BTRFS error (device loop3 state A): Transaction aborted (error -5) BTRFS: error (device loop3 state A) in __cow_file_range_inline:701: errno=-5 IO failure BTRFS info (device loop3 state EA): forced readonly Oops: general protection fault, probably for non-canonical address 0xdffffc0000000026: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137] CPU: 1 PID: 45 Comm: kworker/u32:2 Not tainted 6.9.0-syzkaller-09868-g6e51b4b5bbc0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: writeback wb_workfn (flush-btrfs-4) RIP: 0010:errseq_set+0x28/0x150 lib/errseq.c:72 Code: 90 90 f3 0f 1e fa 41 56 41 89 f6 41 55 41 54 55 53 48 89 fb e8 c9 8f 0c fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 01 RSP: 0018:ffffc900009d71b0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000130 RCX: 0000000000000000 RDX: 0000000000000026 RSI: ffffffff848158b7 RDI: 0000000000000130 RBP: 00000000fffffffb R08: 0000000000000001 R09: fffffbfff284be69 R10: ffffffff9425f34f R11: ffffffff93946908 R12: 0000000000000000 R13: ffffea0001239140 R14: 00000000fffffffb R15: ffffea0001239158 FS: 0000000000000000(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b40fc284f8 CR3: 000000004466c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __filemap_set_wb_err+0x22/0x200 mm/filemap.c:705 mapping_set_error include/linux/pagemap.h:234 [inline] __extent_writepage fs/btrfs/extent_io.c:1517 [inline] extent_write_cache_pages+0x105e/0x1ce0 fs/btrfs/extent_io.c:2173 btrfs_writepages+0x21b/0x4a0 fs/btrfs/extent_io.c:2294 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2634 __writeback_single_inode+0x163/0xf90 fs/fs-writeback.c:1651 writeback_sb_inodes+0x611/0x1150 fs/fs-writeback.c:1947 wb_writeback+0x199/0xb50 fs/fs-writeback.c:2127 wb_do_writeback fs/fs-writeback.c:2274 [inline] wb_workfn+0x28d/0xf40 fs/fs-writeback.c:2314 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:errseq_set+0x28/0x150 lib/errseq.c:72 Code: 90 90 f3 0f 1e fa 41 56 41 89 f6 41 55 41 54 55 53 48 89 fb e8 c9 8f 0c fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 01 RSP: 0018:ffffc900009d71b0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000130 RCX: 0000000000000000 RDX: 0000000000000026 RSI: ffffffff848158b7 RDI: 0000000000000130 RBP: 00000000fffffffb R08: 0000000000000001 R09: fffffbfff284be69 R10: ffffffff9425f34f R11: ffffffff93946908 R12: 0000000000000000 R13: ffffea0001239140 R14: 00000000fffffffb R15: ffffea0001239158 FS: 0000000000000000(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b40fc284f8 CR3: 000000002c1d8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: f3 0f 1e fa endbr64 6: 41 56 push %r14 8: 41 89 f6 mov %esi,%r14d b: 41 55 push %r13 d: 41 54 push %r12 f: 55 push %rbp 10: 53 push %rbx 11: 48 89 fb mov %rdi,%rbx 14: e8 c9 8f 0c fd call 0xfd0c8fe2 19: 48 89 da mov %rbx,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 d8 mov %rbx,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 01 test %eax,(%rcx)