Hello, syzbot found the following issue on: HEAD commit: 549738f1 Linux 5.9-rc8 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=138b8993900000 kernel config: https://syzkaller.appspot.com/x/.config?x=c06bcf3cc963d91c dashboard link: https://syzkaller.appspot.com/bug?extid=d8dcf068719ec73f6ea9 compiler: gcc (GCC) 10.1.0-syz 20200507 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d8dcf068719ec73f6ea9@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 1 PID: 7216 Comm: syz-executor.5 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:894 [inline] register_lock_class+0x157d/0x1630 kernel/locking/lockdep.c:1206 __lock_acquire+0x101/0x5780 kernel/locking/lockdep.c:4320 lock_acquire+0x1f3/0xaf0 kernel/locking/lockdep.c:5029 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x94/0xd0 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:379 [inline] clear_inode+0x1b/0x1e0 fs/inode.c:529 shmem_evict_inode+0x240/0xbc0 mm/shmem.c:1182 evict+0x2ed/0x750 fs/inode.c:576 iput_final fs/inode.c:1652 [inline] iput.part.0+0x424/0x850 fs/inode.c:1678 iput+0x58/0x70 fs/inode.c:1668 do_unlinkat+0x40b/0x660 fs/namei.c:3902 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f4f549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000090bed1c EFLAGS: 00000212 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00000000090bedac RCX: 000000005f7aa726 RDX: 0000000009908228 RSI: 0000000000000000 RDI: 00000000080d8a9e RBP: 00000000090bedac R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ kernel BUG at fs/inode.c:533! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7216 Comm: syz-executor.5 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:clear_inode+0x189/0x1e0 fs/inode.c:533 Code: 75 38 e8 aa 5e ad ff 48 c7 83 d8 00 00 00 60 00 00 00 5b 5d 41 5c c3 e8 95 5e ad ff 0f 0b e8 8e 5e ad ff 0f 0b e8 87 5e ad ff <0f> 0b e8 80 5e ad ff 0f 0b e8 79 5e ad ff 0f 0b e8 72 5e ad ff 0f RSP: 0018:ffffc90006677c38 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88800011c120 RCX: 0000000000000000 RDX: ffff8880910aa380 RSI: ffffffff81c8e009 RDI: 0000000000000001 RBP: ffff88800011c4c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000031323754 R12: ffff88800011c350 R13: ffff888086128878 R14: ffff88800011c0c8 R15: ffff88800011c0c8 FS: 0000000000000000(0000) GS:ffff8880ae500000(0063) knlGS:0000000009907900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002001d000 CR3: 00000000a4575000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: shmem_evict_inode+0x240/0xbc0 mm/shmem.c:1182 evict+0x2ed/0x750 fs/inode.c:576 iput_final fs/inode.c:1652 [inline] iput.part.0+0x424/0x850 fs/inode.c:1678 iput+0x58/0x70 fs/inode.c:1668 do_unlinkat+0x40b/0x660 fs/namei.c:3902 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f4f549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000090bed1c EFLAGS: 00000212 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00000000090bedac RCX: 000000005f7aa726 RDX: 0000000009908228 RSI: 0000000000000000 RDI: 00000000080d8a9e RBP: 00000000090bedac R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 9126b3e9e9b64308 ]--- RIP: 0010:clear_inode+0x189/0x1e0 fs/inode.c:533 Code: 75 38 e8 aa 5e ad ff 48 c7 83 d8 00 00 00 60 00 00 00 5b 5d 41 5c c3 e8 95 5e ad ff 0f 0b e8 8e 5e ad ff 0f 0b e8 87 5e ad ff <0f> 0b e8 80 5e ad ff 0f 0b e8 79 5e ad ff 0f 0b e8 72 5e ad ff 0f RSP: 0018:ffffc90006677c38 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88800011c120 RCX: 0000000000000000 RDX: ffff8880910aa380 RSI: ffffffff81c8e009 RDI: 0000000000000001 RBP: ffff88800011c4c8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000031323754 R12: ffff88800011c350 R13: ffff888086128878 R14: ffff88800011c0c8 R15: ffff88800011c0c8 FS: 0000000000000000(0000) GS:ffff8880ae500000(0063) knlGS:0000000009907900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000090c7850 CR3: 00000000a4575000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. 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