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AJvYcCVfPS2vHaJ26xxzeSB+YUDyo39/muG9X1t68e41de9Doo+WCaJQqcoBa2H9LqqBUYXIVJ9NUKVEbXrHemE=@vger.kernel.org X-Gm-Message-State: AOJu0Yxmr2MnmX7mDgds0QFjWcQEfaMDO170PIOXlhoppOgj4XanOhgD RNItC4nJcRlEY86yd5mQsn1YH51x/ECY2KpytIu4ypNpVEVw6gs3XMsqa9AydjPJ2cmWwCQoDh7 ldPrhmZBrvnm5RmBA+Hw5DCDPOuaE4OPgZtGj1d/ABQJtI72Y1RVkNJIg5kw= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:e848:0:b0:67b:dc7d:8141 with SMTP id 006d021491bc7-67c22f85c1fmr10438635eaf.39.1774345561409; Tue, 24 Mar 2026 02:46:01 -0700 (PDT) Date: Tue, 24 Mar 2026 02:46:01 -0700 In-Reply-To: <20260324092747.1459265-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69c25d59.a70a0220.3cae05.000b.GAE@google.com> Subject: Re: [syzbot] [gfs2?] INFO: task hung in gfs2_recover_journal (4) From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in gfs2_fill_super loop1: detected capacity change from 0 to 32768 ------------[ cut here ]------------ kmem_cache of name 'gfs2-bufdata/syz:syz' already exists WARNING: mm/slab_common.c:112 at kmem_cache_sanity_check mm/slab_common.c:111 [inline], CPU#0: syz.1.18/6515 WARNING: mm/slab_common.c:112 at __kmem_cache_create_args+0xac/0x440 mm/slab_common.c:352, CPU#0: syz.1.18/6515 Modules linked in: CPU: 0 UID: 0 PID: 6515 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:kmem_cache_sanity_check mm/slab_common.c:111 [inline] RIP: 0010:__kmem_cache_create_args+0xaf/0x440 mm/slab_common.c:352 Code: 86 8e 4d 8b 24 24 49 81 fc 18 68 86 8e 74 20 49 8b 7c 24 f8 48 89 de e8 3f 5c 9c 09 85 c0 75 e2 48 8d 3d 54 70 06 0e 48 89 de <67> 48 0f b9 3a 48 89 df be 20 00 00 00 e8 df 5d 9c 09 48 85 c0 0f RSP: 0018:ffffc90003407948 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880563c5040 RCX: 0000000000000005 RDX: 00000000563c5004 RSI: ffff8880563c5040 RDI: ffffffff9016e0b0 RBP: 0000000000000000 R08: ffffffff901246f7 R09: 1ffffffff20248de R10: dffffc0000000000 R11: fffffbfff20248df R12: ffff88814a3b6a60 R13: ffff888035dd4000 R14: 0000000000000050 R15: ffffc90003407a60 FS: 00007fdcb83716c0(0000) GS:ffff888125448000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdcb7585900 CR3: 000000005e392000 CR4: 00000000003526f0 Call Trace: __kmem_cache_create include/linux/slab.h:390 [inline] gfs2_fill_super+0x13a7/0x21f0 fs/gfs2/ops_fstype.c:1202 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1343 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3764 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3840 do_mount fs/namespace.c:4173 [inline] __do_sys_mount fs/namespace.c:4372 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4349 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdcb759da0a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdcb8370e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fdcb8370ee0 RCX: 00007fdcb759da0a RDX: 0000200000037f40 RSI: 0000200000037f80 RDI: 00007fdcb8370ea0 RBP: 0000200000037f40 R08: 00007fdcb8370ee0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000037f80 R13: 00007fdcb8370ea0 R14: 0000000000037fc4 R15: 0000200000000300 ---------------- Code disassembly (best guess): 0: 86 8e 4d 8b 24 24 xchg %cl,0x24248b4d(%rsi) 6: 49 81 fc 18 68 86 8e cmp $0xffffffff8e866818,%r12 d: 74 20 je 0x2f f: 49 8b 7c 24 f8 mov -0x8(%r12),%rdi 14: 48 89 de mov %rbx,%rsi 17: e8 3f 5c 9c 09 call 0x99c5c5b 1c: 85 c0 test %eax,%eax 1e: 75 e2 jne 0x2 20: 48 8d 3d 54 70 06 0e lea 0xe067054(%rip),%rdi # 0xe06707b 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 89 df mov %rbx,%rdi 32: be 20 00 00 00 mov $0x20,%esi 37: e8 df 5d 9c 09 call 0x99c5e1b 3c: 48 85 c0 test %rax,%rax 3f: 0f .byte 0xf Tested on: commit: 09c0f7f1 Add linux-next specific files for 20260323 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=10f39e16580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c0c30527ccbcb0f2 dashboard link: https://syzkaller.appspot.com/bug?extid=9013411dc43f3582823a compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=132fc1d6580000