Hello, syzbot found the following issue on: HEAD commit: 55be6084c8e0 Merge tag 'timers-core-2022-10-05' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=127fc1a4880000 kernel config: https://syzkaller.appspot.com/x/.config?x=c29b6436e994d72e dashboard link: https://syzkaller.appspot.com/bug?extid=f587f14d28021bea6455 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c8f5131ab57d/disk-55be6084.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/77167f226f35/vmlinux-55be6084.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f587f14d28021bea6455@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 64 general protection fault, probably for non-canonical address 0xe0017c0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x000c000000000030-0x000c000000000037] CPU: 1 PID: 13181 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:owner_on_cpu include/linux/sched.h:2283 [inline] RIP: 0010:mutex_can_spin_on_owner kernel/locking/mutex.c:409 [inline] RIP: 0010:mutex_optimistic_spin+0x12d/0x2d0 kernel/locking/mutex.c:452 Code: 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 08 99 75 00 4c 8b 23 49 83 e4 f8 74 72 49 8d 6c 24 34 48 89 e8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 4f 01 00 00 83 7d 00 00 74 78 49 83 c4 14 RSP: 0018:ffffc90004bf77e8 EFLAGS: 00010207 RAX: 0001800000000006 RBX: ffff88801dc69228 RCX: ffffffff81676b52 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801dc69228 RBP: 000c000000000034 R08: dffffc0000000000 R09: ffffed1003b8d246 R10: ffffed1003b8d246 R11: 1ffff11003b8d245 R12: 000c000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fed86ab8700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed85913e09 CR3: 000000007cedc000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __mutex_lock_common+0x210/0x26c0 kernel/locking/mutex.c:607 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x77/0xd0 fs/reiserfs/lock.c:27 reiserfs_readdir_inode+0x170/0x1470 fs/reiserfs/dir.c:79 iterate_dir+0x257/0x5f0 __do_sys_getdents fs/readdir.c:286 [inline] __se_sys_getdents+0x1e9/0x4a0 fs/readdir.c:271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fed8588b5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fed86ab8168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007fed859abf80 RCX: 00007fed8588b5a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fed858e6580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3696e99f R14: 00007fed86ab8300 R15: 0000000000022000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:owner_on_cpu include/linux/sched.h:2283 [inline] RIP: 0010:mutex_can_spin_on_owner kernel/locking/mutex.c:409 [inline] RIP: 0010:mutex_optimistic_spin+0x12d/0x2d0 kernel/locking/mutex.c:452 Code: 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 08 99 75 00 4c 8b 23 49 83 e4 f8 74 72 49 8d 6c 24 34 48 89 e8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 4f 01 00 00 83 7d 00 00 74 78 49 83 c4 14 RSP: 0018:ffffc90004bf77e8 EFLAGS: 00010207 RAX: 0001800000000006 RBX: ffff88801dc69228 RCX: ffffffff81676b52 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801dc69228 RBP: 000c000000000034 R08: dffffc0000000000 R09: ffffed1003b8d246 R10: ffffed1003b8d246 R11: 1ffff11003b8d245 R12: 000c000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fed86ab8700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed85913e09 CR3: 000000007cedc000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 d8 mov %ebx,%eax 2: 48 c1 e8 03 shr $0x3,%rax 6: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) b: 74 08 je 0x15 d: 48 89 df mov %rbx,%rdi 10: e8 08 99 75 00 callq 0x75991d 15: 4c 8b 23 mov (%rbx),%r12 18: 49 83 e4 f8 and $0xfffffffffffffff8,%r12 1c: 74 72 je 0x90 1e: 49 8d 6c 24 34 lea 0x34(%r12),%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 8a 04 28 mov (%rax,%r13,1),%al <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 4f 01 00 00 jne 0x185 36: 83 7d 00 00 cmpl $0x0,0x0(%rbp) 3a: 74 78 je 0xb4 3c: 49 83 c4 14 add $0x14,%r12 --- This report is generated by a bot. 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