From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f78.google.com (mail-ot1-f78.google.com [209.85.210.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9B2D480323 for ; Fri, 14 Aug 2026 15:11:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786720293; cv=none; b=rxpg0Jy2a/rqv70H8F4aHYZ8yuI4c8EHvWCtgQ5DQ/xC10YoK0yZjq9DSt3c0VX7GKNx7qiK8LcWTRqopkpyfa6HUuSUZNsk7ED0U1lbyas2r6UecNL1vIm6MBXkTck2ZfZY9XXuWDNo7i14FE+RFm7vuvysNfa90we520Hn4/M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786720293; c=relaxed/simple; bh=/ZrmtC2pVKkk+Fgrao8x+BBCzcnQ5vlH+XOL5czNtDc=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=HtHcNJD87xBVY3W6j6SiMxgXPbqldj+oN6qhd8rCLIXmktWKnpqToKcQmfUM4a05XIvQRYuteUoFTSUzO9s0ChXYOraLbCqQalVSotacHlY6jwLMus1D7GRjvbdAoMM18R1JCl1PqMU2pPnPQtQDoxnRQhhUB1cSyQOniLepehU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.210.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-ot1-f78.google.com with SMTP id 46e09a7af769-7e6b73b3920so894690a34.0 for ; Fri, 14 Aug 2026 08:11:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786720289; x=1787325089; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=ckS03SzjPkKNDuc+6LezxBOebF0DwUwc/THgl/tiQUA=; b=c+h4KMHixgtv1p5WRE6WNWNL3l4ra84MFGn1foB7kM2YPGL8Id6Y7fpbJsa9aaknz/ ZQwSL6o+0Da+J12UQaRujESyZbaaBSzPuq2rdzKbKtJPNC2iOm2byuWRViOdS2d47jt8 Cp1veliXuXt6/KOIJRILV4HKpCw8yGGuUJwa+c1mcnycPLuG8QPZAHy0LioGVPLL3R0G LYZzMYQh6VD3l82AUsLuyJCT38Va8bLF5eSNlo8z7ctle6UfgBcUwMfGdI68qDRHaWLI 7fV6OgBi78agYUWpNskYk+BwLKqVYzMds/GEGMCLNIvYVcJsgaw1bD5ENsrc3LP5vD4n HrUw== X-Gm-Message-State: AOJu0YxCpa+FKzzuc2vqbrgXofNiMwMyM733srlrBxqSEvcHasWqg7/4 +jWjc1nxEqJqWPVdh6TszESoWwOXRg12BYsbjFC1WrI0ZUHfW/GmBHzDj+2LjPInFYdal+zgQ4y Uf/7Dz7XVHq57YSnMq8Lk4kIDwNZZh/zPU//PqOF/d2wvZdCVFC6vx0vYRw4iCQ== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:201b:b0:6b0:589e:42f4 with SMTP id 006d021491bc7-6b0d6245e3bmr5390234eaf.20.1786720288815; Fri, 14 Aug 2026 08:11:28 -0700 (PDT) Date: Fri, 14 Aug 2026 08:11:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7f3020.5ca1970b.32aa76.0004.GAE@google.com> Subject: [syzbot] [mmc?] WARNING: suspicious RCU usage in cancel_delayed_work_sync From: syzbot To: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com, ulf.hansson@linaro.org, ulfh@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 05abeffcc27e Merge tag 'usb-serial-7.3-rc1' of ssh://gitol.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=172cfac6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8bdeea7ee6735f91 dashboard link: https://syzkaller.appspot.com/bug?extid=9c1988bc953fca2086a3 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f63099341558/disk-05abeffc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2f8181068028/vmlinux-05abeffc.xz kernel image: https://storage.googleapis.com/syzbot-assets/7d35739c76eb/bzImage-05abeffc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9c1988bc953fca2086a3@syzkaller.appspotmail.com ============================= WARNING: suspicious RCU usage syzkaller #0 Not tainted ----------------------------- kernel/sched/core.c:9159 Illegal context switch in RCU-sched read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 9 locks held by syz-executor/2973: #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289 #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline] #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739 #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline] #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746 #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline] #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404 #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555 #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270 #8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 stack backtrace: CPU: 0 UID: 0 PID: 2973 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 lockdep_rcu_suspicious.cold+0x4f/0xb1 kernel/locking/lockdep.c:6876 __might_resched+0x2e0/0x330 kernel/sched/core.c:9159 __cancel_work_sync kernel/workqueue.c:4487 [inline] cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1dd/0x990 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x26/0xe0 lib/smp_processor_id.c:54 Code: 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 65 1f 82 05 65 f7 05 56 1f 82 05 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d 41 5c cc cc cc cc 9c 58 f6 c4 02 74 ea 65 4c 8b 25 1e 1f 82 05 48 89 RSP: 0018:ffffc90001457430 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000125cae RCX: ffffffff82216929 RDX: ffff8881236b0000 RSI: ffffffff87b15680 RDI: ffffffff87b156c0 RBP: ffff88823ff5d480 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 rcu_read_lock_sched include/linux/rcupdate.h:939 [inline] pfn_valid+0x2d0/0x4a0 include/linux/mmzone.h:2270 page_table_check_set+0x25/0x580 mm/page_table_check.c:105 __page_table_check_ptes_set+0x217/0x270 mm/page_table_check.c:223 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline] set_ptes include/linux/pgtable.h:447 [inline] __copy_present_ptes mm/memory.c:1118 [inline] copy_present_ptes mm/memory.c:1197 [inline] copy_pte_range mm/memory.c:1320 [inline] copy_pmd_range mm/memory.c:1408 [inline] copy_pud_range mm/memory.c:1445 [inline] copy_p4d_range mm/memory.c:1469 [inline] copy_page_range+0x1c87/0x56a0 mm/memory.c:1555 dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840 dup_mm kernel/fork.c:1543 [inline] copy_mm kernel/fork.c:1595 [inline] copy_process+0x4996/0x7dd0 kernel/fork.c:2289 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 __do_sys_clone+0xd9/0x120 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2fd1056b52 Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc26622180 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc26622180 RCX: 00007f2fd1056b52 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc2662230c R08: 0000000000000000 R09: 0000000000000001 R10: 000055558a3997d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000927c0 R14: 000000000001c243 R15: 00007ffc26622360 BUG: sleeping function called from invalid context at kernel/workqueue.c:4487 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2973, name: syz-executor preempt_count: 104, expected: 0 RCU nest depth: 2, expected: 0 9 locks held by syz-executor/2973: #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289 #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline] #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739 #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline] #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746 #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline] #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404 #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555 #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270 #8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 UID: 0 PID: 2973 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9197 __cancel_work_sync kernel/workqueue.c:4487 [inline] cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1dd/0x990 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x26/0xe0 lib/smp_processor_id.c:54 Code: 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 65 1f 82 05 65 f7 05 56 1f 82 05 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d 41 5c cc cc cc cc 9c 58 f6 c4 02 74 ea 65 4c 8b 25 1e 1f 82 05 48 89 RSP: 0018:ffffc90001457430 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000125cae RCX: ffffffff82216929 RDX: ffff8881236b0000 RSI: ffffffff87b15680 RDI: ffffffff87b156c0 RBP: ffff88823ff5d480 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 rcu_read_lock_sched include/linux/rcupdate.h:939 [inline] pfn_valid+0x2d0/0x4a0 include/linux/mmzone.h:2270 page_table_check_set+0x25/0x580 mm/page_table_check.c:105 __page_table_check_ptes_set+0x217/0x270 mm/page_table_check.c:223 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline] set_ptes include/linux/pgtable.h:447 [inline] __copy_present_ptes mm/memory.c:1118 [inline] copy_present_ptes mm/memory.c:1197 [inline] copy_pte_range mm/memory.c:1320 [inline] copy_pmd_range mm/memory.c:1408 [inline] copy_pud_range mm/memory.c:1445 [inline] copy_p4d_range mm/memory.c:1469 [inline] copy_page_range+0x1c87/0x56a0 mm/memory.c:1555 dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840 dup_mm kernel/fork.c:1543 [inline] copy_mm kernel/fork.c:1595 [inline] copy_process+0x4996/0x7dd0 kernel/fork.c:2289 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 __do_sys_clone+0xd9/0x120 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2fd1056b52 Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc26622180 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc26622180 RCX: 00007f2fd1056b52 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc2662230c R08: 0000000000000000 R09: 0000000000000001 R10: 000055558a3997d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000927c0 R14: 000000000001c243 R15: 00007ffc26622360 ============================= WARNING: suspicious RCU usage syzkaller #0 Tainted: G W ----------------------------- kernel/rcu/srcutree.c:1483 Illegal synchronize_srcu() in same-type SRCU (or in RCU) read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 9 locks held by syz-executor/2973: #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289 #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline] #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739 #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline] #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746 #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline] #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404 #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555 #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270 #8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 stack backtrace: CPU: 0 UID: 0 PID: 2973 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 lockdep_rcu_suspicious.cold+0x4f/0xb1 kernel/locking/lockdep.c:6876 __synchronize_srcu+0x29d/0x300 kernel/rcu/srcutree.c:1483 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline] wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69 device_release+0xd2/0x270 drivers/base/core.c:2636 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3880 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1dd/0x990 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x26/0xe0 lib/smp_processor_id.c:54 Code: 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 65 1f 82 05 65 f7 05 56 1f 82 05 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d 41 5c cc cc cc cc 9c 58 f6 c4 02 74 ea 65 4c 8b 25 1e 1f 82 05 48 89 RSP: 0018:ffffc90001457430 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000125cae RCX: ffffffff82216929 RDX: ffff8881236b0000 RSI: ffffffff87b15680 RDI: ffffffff87b156c0 RBP: ffff88823ff5d480 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 rcu_read_lock_sched include/linux/rcupdate.h:939 [inline] pfn_valid+0x2d0/0x4a0 include/linux/mmzone.h:2270 page_table_check_set+0x25/0x580 mm/page_table_check.c:105 __page_table_check_ptes_set+0x217/0x270 mm/page_table_check.c:223 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline] set_ptes include/linux/pgtable.h:447 [inline] __copy_present_ptes mm/memory.c:1118 [inline] copy_present_ptes mm/memory.c:1197 [inline] copy_pte_range mm/memory.c:1320 [inline] copy_pmd_range mm/memory.c:1408 [inline] copy_pud_range mm/memory.c:1445 [inline] copy_p4d_range mm/memory.c:1469 [inline] copy_page_range+0x1c87/0x56a0 mm/memory.c:1555 dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840 dup_mm kernel/fork.c:1543 [inline] copy_mm kernel/fork.c:1595 [inline] copy_process+0x4996/0x7dd0 kernel/fork.c:2289 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 __do_sys_clone+0xd9/0x120 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2fd1056b52 Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc26622180 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc26622180 RCX: 00007f2fd1056b52 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc2662230c R08: 0000000000000000 R09: 0000000000000001 R10: 000055558a3997d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000927c0 R14: 000000000001c243 R15: 00007ffc26622360 BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1491 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2973, name: syz-executor preempt_count: 104, expected: 0 RCU nest depth: 2, expected: 0 9 locks held by syz-executor/2973: #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1542 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm kernel/fork.c:1595 [inline] #0: ffffffff89823d10 (dup_mmap_sem){.+.+}-{0:0}, at: copy_process+0x498b/0x7dd0 kernel/fork.c:2289 #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline] #1: ffff888123fdceb8 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x11f/0x1f60 mm/mmap.c:1739 #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:544 [inline] #2: ffff888118e9e7b8 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x1ba/0x1f60 mm/mmap.c:1746 #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #3: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline] #4: ffff88810cf5e8b8 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: pte_offset_map_lock+0x10f/0x320 mm/pgtable-generic.c:404 #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #5: ffffffff896e2bc0 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x2f/0x300 mm/pgtable-generic.c:290 #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pte_range mm/memory.c:1272 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pmd_range mm/memory.c:1408 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_pud_range mm/memory.c:1445 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_p4d_range mm/memory.c:1469 [inline] #6: ffff888123d09f18 (ptlock_ptr(ptdesc)#2/1){+.+.}-{3:3}, at: copy_page_range+0xcc2/0x56a0 mm/memory.c:1555 #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #7: ffffffff896e2b00 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xbc/0x4a0 include/linux/mmzone.h:2270 #8: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 UID: 0 PID: 2973 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9197 __synchronize_srcu+0x13c/0x300 kernel/rcu/srcutree.c:1491 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline] wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69 device_release+0xd2/0x270 drivers/base/core.c:2636 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3880 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1dd/0x990 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x160/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x26/0xe0 lib/smp_processor_id.c:54 Code: 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 65 1f 82 05 65 f7 05 56 1f 82 05 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d 41 5c cc cc cc cc 9c 58 f6 c4 02 74 ea 65 4c 8b 25 1e 1f 82 05 48 89 RSP: 0018:ffffc90001457430 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 0000000000125cae RCX: ffffffff82216929 RDX: ffff8881236b0000 RSI: ffffffff87b15680 RDI: ffffffff87b156c0 RBP: ffff88823ff5d480 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88823ff5e000 R14: dffffc0000000000 R15: 0000000000000000 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 rcu_read_lock_sched include/linux/rcupdate.h:939 [inline] pfn_valid+0x2d0/0x4a0 include/linux/mmzone.h:2270 page_table_check_set+0x25/0x580 mm/page_table_check.c:105 __page_table_check_ptes_set+0x217/0x270 mm/page_table_check.c:223 page_table_check_ptes_set include/linux/page_table_check.h:83 [inline] set_ptes include/linux/pgtable.h:447 [inline] __copy_present_ptes mm/memory.c:1118 [inline] copy_present_ptes mm/memory.c:1197 [inline] copy_pte_range mm/memory.c:1320 [inline] copy_pmd_range mm/memory.c:1408 [inline] copy_pud_range mm/memory.c:1445 [inline] copy_p4d_range mm/memory.c:1469 [inline] copy_page_range+0x1c87/0x56a0 mm/memory.c:1555 dup_mmap+0xcd8/0x1f60 mm/mmap.c:1840 dup_mm kernel/fork.c:1543 [inline] copy_mm kernel/fork.c:1595 [inline] copy_process+0x4996/0x7dd0 kernel/fork.c:2289 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 __do_sys_clone+0xd9/0x120 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0x7f0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2fd1056b52 Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc26622180 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc26622180 RCX: 00007f2fd1056b52 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc2662230c R08: 0000000000000000 R09: 0000000000000001 R10: 000055558a3997d0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000927c0 R14: 000000000001c243 R15: 00007ffc26622360 ODEBUG: object ffffc90000007a70 is NOT on stack ffffc90001450000, but annotated. ====================================================== ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 41 54 push %r12 6: 55 push %rbp 7: 53 push %rbx 8: 48 83 ec 08 sub $0x8,%rsp c: 65 8b 1d 65 1f 82 05 mov %gs:0x5821f65(%rip),%ebx # 0x5821f78 13: 65 f7 05 56 1f 82 05 testl $0x7fffffff,%gs:0x5821f56(%rip) # 0x5821f74 1a: ff ff ff 7f 1e: 74 0f je 0x2f 20: 48 83 c4 08 add $0x8,%rsp 24: 89 d8 mov %ebx,%eax 26: 5b pop %rbx 27: 5d pop %rbp 28: 41 5c pop %r12 * 2a: c3 ret <-- trapping instruction 2b: cc int3 2c: cc int3 2d: cc int3 2e: cc int3 2f: 9c pushf 30: 58 pop %rax 31: f6 c4 02 test $0x2,%ah 34: 74 ea je 0x20 36: 65 4c 8b 25 1e 1f 82 mov %gs:0x5821f1e(%rip),%r12 # 0x5821f5c 3d: 05 3e: 48 rex.W 3f: 89 .byte 0x89 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup