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syzbot To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c03c1a14507d Linux 7.3 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=128d8ca5580000 kernel config: https://syzkaller.appspot.com/x/.config?x=129d675874dbf896 dashboard link: https://syzkaller.appspot.com/bug?extid=f11512d1e5878ba5e60e compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=168d8ca5580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f11512d1e5878ba5e60e@syzkaller.appspotmail.com ============================= [ BUG: Invalid wait context ] syzkaller #0 Tainted: G S ----------------------------- syz-executor177/6041 is trying to lock: ffff88801d040618 (&n->list_lock){-.-.}-{3:3}, at: get_partial_node_bulk mm/slub.c:3831 [inline] ffff88801d040618 (&n->list_lock){-.-.}-{3:3}, at: __refill_objects_node+0x104/0xab0 mm/slub.c:7279 other info that might help us debug this: context-{2:2} locks held by syz-executor177/6041: 1, last CPU#1: #0: ffffffff9090b438 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #0: ffffffff9090b438 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #0: ffffffff9090b438 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline] #0: ffffffff9090b438 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_check_open_permission+0x169/0x3c0 security/tomoyo/file.c:772 stack backtrace: CPU: 1 UID: 0 PID: 6041 Comm: syz-executor177 Tainted: G S syzkaller #0 PREEMPT(full) Tainted: [S]=CPU_OUT_OF_SPEC Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4874 [inline] check_wait_context kernel/locking/lockdep.c:4946 [inline] __lock_acquire+0xfcc/0x1f40 kernel/locking/lockdep.c:5238 lock_acquire kernel/locking/lockdep.c:5942 [inline] lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:181 get_partial_node_bulk mm/slub.c:3831 [inline] __refill_objects_node+0x104/0xab0 mm/slub.c:7279 refill_objects+0x58/0x410 mm/slub.c:7405 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __kmalloc_cache_noprof+0x4f4/0x6d0 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] kvm_async_pf_task_wake arch/x86/kernel/kvm.c:224 [inline] __sysvec_kvm_asyncpf_interrupt+0x334/0x610 arch/x86/kernel/kvm.c:338 instr_sysvec_kvm_asyncpf_interrupt arch/x86/kernel/kvm.c:327 [inline] sysvec_kvm_asyncpf_interrupt+0x9e/0xc0 arch/x86/kernel/kvm.c:327 asm_sysvec_kvm_asyncpf_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:753 RIP: 0010:memcmp+0x156/0x1d0 lib/string.c:665 Code: 0f 86 fb fe ff ff 48 89 d8 48 89 de 48 c1 e8 03 83 e6 07 42 0f b6 14 28 48 8d 43 07 48 89 c1 48 c1 e9 03 40 38 f2 40 0f 9e c6 <84> d2 42 0f b6 0c 29 0f 95 c2 40 84 d6 0f 84 45 ff ff ff be 08 00 RSP: 0018:ffffc90003ab7538 EFLAGS: 00000297 RAX: ffff8880220be413 RBX: ffff8880220be40c RCX: 1ffff11004417c82 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880220be40c RBP: ffffffff8c58a940 R08: 0000000000000001 R09: 0000000000000066 R10: 0000000000000066 R11: 0000000000000001 R12: 0000000000000012 R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000000 strstr+0x109/0x170 lib/string.c:743 tomoyo_add_entry security/tomoyo/common.c:2157 [inline] tomoyo_supervisor+0xf47/0x1340 security/tomoyo/common.c:2238 tomoyo_audit_path_log security/tomoyo/file.c:169 [inline] tomoyo_path_permission security/tomoyo/file.c:592 [inline] tomoyo_path_permission+0x270/0x3b0 security/tomoyo/file.c:577 tomoyo_check_open_permission+0x37f/0x3c0 security/tomoyo/file.c:782 tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334 security_file_open+0xb5/0x1e0 security/security.c:2739 do_dentry_open+0x588/0x14d0 fs/open.c:973 vfs_open+0x82/0x3f0 fs/open.c:1101 do_open fs/namei.c:4836 [inline] path_openat+0x1a23/0x2450 fs/namei.c:4999 do_file_open+0x20e/0x430 fs/namei.c:5028 do_sys_openat2+0x10f/0x1e0 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1434 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f589f9da7be Code: 08 0f 85 55 ec ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007f589affe098 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f589affe6c0 RCX: 00007f589f9da7be RDX: 0000000000000002 RSI: 00007f589affe1a0 RDI: ffffffffffffff9c RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f589affe1a0 R13: 0000000000000001 R14: 00007ffef59973a0 R15: 00007ffef5997488 ---------------- Code disassembly (best guess): 0: 0f 86 fb fe ff ff jbe 0xffffff01 6: 48 89 d8 mov %rbx,%rax 9: 48 89 de mov %rbx,%rsi c: 48 c1 e8 03 shr $0x3,%rax 10: 83 e6 07 and $0x7,%esi 13: 42 0f b6 14 28 movzbl (%rax,%r13,1),%edx 18: 48 8d 43 07 lea 0x7(%rbx),%rax 1c: 48 89 c1 mov %rax,%rcx 1f: 48 c1 e9 03 shr $0x3,%rcx 23: 40 38 f2 cmp %sil,%dl 26: 40 0f 9e c6 setle %sil * 2a: 84 d2 test %dl,%dl <-- trapping instruction 2c: 42 0f b6 0c 29 movzbl (%rcx,%r13,1),%ecx 31: 0f 95 c2 setne %dl 34: 40 84 d6 test %dl,%sil 37: 0f 84 45 ff ff ff je 0xffffff82 3d: be .byte 0xbe 3e: 08 00 or %al,(%rax) --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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