loop0: detected capacity change from 0 to 32768 overlay: filesystem on ./file0 not supported ERROR: (device loop0): xtSearch: xt_getpage: xtree page corrupt ERROR: (device loop0): remounting filesystem as read-only BUG: unable to handle page fault for address: ffffffffa1ae5920 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD dd3f067 P4D dd3f067 PUD dd40063 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5347 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:222 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:233 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:__lock_acquire+0x6ce/0x2cf0 kernel/locking/lockdep.c:5207 Code: 24 08 4c 89 f7 4c 89 ee ba 08 00 00 00 e8 6a 44 00 00 31 ed 85 c0 0f 84 6d 0d 00 00 83 3d 79 0b ee 17 00 75 13 48 63 44 24 18 <48> 0f a3 05 8a 7b ea 11 0f 83 8a 1e 00 00 49 8b 9e 20 0b 00 00 48 RSP: 0018:ffffc9000a8bf230 EFLAGS: 00010046 RAX: 00000000712f271a RBX: 0000000000000000 RCX: ffffffff932f0000 RDX: 0000000000000008 RSI: ffff88801a21b090 RDI: ffff88801a21a4c0 RBP: 0000000000000000 R08: ffffffff819b39cf R09: ffff88805545c0d8 R10: dffffc0000000000 R11: fffffbfff1f048cf R12: 000000000000071a R13: ffff88801a21b090 R14: ffff88801a21a4c0 R15: ffff88801a21aff0 FS: 00007fe12f93f6c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa1ae5920 CR3: 00000000126d9000 CR4: 0000000000352ef0 Call Trace: lock_acquire+0x107/0x340 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 __wake_up_common_lock+0x2f/0x1f0 kernel/sched/wait.c:124 unlock_metapage fs/jfs/jfs_metapage.c:40 [inline] release_metapage+0x13c/0xac0 fs/jfs/jfs_metapage.c:871 xtTruncate+0xe84/0x2e70 fs/jfs/jfs_xtree.c:-1 jfs_truncate_nolock+0x2a7/0x340 fs/jfs/inode.c:381 jfs_truncate fs/jfs/inode.c:420 [inline] jfs_write_failed+0x119/0x190 fs/jfs/inode.c:295 jfs_write_begin+0x6f/0x80 fs/jfs/inode.c:308 generic_perform_write+0x2c5/0x900 mm/filemap.c:4314 generic_file_write_iter+0x117/0x550 mm/filemap.c:4457 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe12eb8f7c9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe12f93f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe12ede5fa0 RCX: 00007fe12eb8f7c9 RDX: 0000000000000009 RSI: 0000200000000280 RDI: 0000000000000005 RBP: 00007fe12ec13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe12ede6038 R14: 00007fe12ede5fa0 R15: 00007ffc03531208 Modules linked in: CR2: ffffffffa1ae5920 ---[ end trace 0000000000000000 ]--- RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:222 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:233 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:__lock_acquire+0x6ce/0x2cf0 kernel/locking/lockdep.c:5207 Code: 24 08 4c 89 f7 4c 89 ee ba 08 00 00 00 e8 6a 44 00 00 31 ed 85 c0 0f 84 6d 0d 00 00 83 3d 79 0b ee 17 00 75 13 48 63 44 24 18 <48> 0f a3 05 8a 7b ea 11 0f 83 8a 1e 00 00 49 8b 9e 20 0b 00 00 48 RSP: 0018:ffffc9000a8bf230 EFLAGS: 00010046 RAX: 00000000712f271a RBX: 0000000000000000 RCX: ffffffff932f0000 RDX: 0000000000000008 RSI: ffff88801a21b090 RDI: ffff88801a21a4c0 RBP: 0000000000000000 R08: ffffffff819b39cf R09: ffff88805545c0d8 R10: dffffc0000000000 R11: fffffbfff1f048cf R12: 000000000000071a R13: ffff88801a21b090 R14: ffff88801a21a4c0 R15: ffff88801a21aff0 FS: 00007fe12f93f6c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffa1ae5920 CR3: 00000000126d9000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 24 08 and $0x8,%al 2: 4c 89 f7 mov %r14,%rdi 5: 4c 89 ee mov %r13,%rsi 8: ba 08 00 00 00 mov $0x8,%edx d: e8 6a 44 00 00 call 0x447c 12: 31 ed xor %ebp,%ebp 14: 85 c0 test %eax,%eax 16: 0f 84 6d 0d 00 00 je 0xd89 1c: 83 3d 79 0b ee 17 00 cmpl $0x0,0x17ee0b79(%rip) # 0x17ee0b9c 23: 75 13 jne 0x38 25: 48 63 44 24 18 movslq 0x18(%rsp),%rax * 2a: 48 0f a3 05 8a 7b ea bt %rax,0x11ea7b8a(%rip) # 0x11ea7bbc <-- trapping instruction 31: 11 32: 0f 83 8a 1e 00 00 jae 0x1ec2 38: 49 8b 9e 20 0b 00 00 mov 0xb20(%r14),%rbx 3f: 48 rex.W