do_group_exit+0xd3/0x2a0 kernel/exit.c:1023 __do_sys_exit_group kernel/exit.c:1034 [inline] __se_sys_exit_group kernel/exit.c:1032 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1507! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 29725 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:folio_unlock mm/filemap.c:1507 [inline] RIP: 0010:folio_unlock+0xb3/0xd0 mm/filemap.c:1502 Code: 33 5b cd ff 48 89 ef 31 f6 e8 59 eb ff ff 5b 5d e9 22 5b cd ff e8 1d 5b cd ff 48 c7 c6 20 b8 37 8b 48 89 ef e8 4e 21 11 00 90 <0f> 0b 48 89 df e8 d3 8d 2a 00 e9 7b ff ff ff 66 66 2e 0f 1f 84 00 RSP: 0018:ffffc90002d17258 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9002b410000 RDX: 0000000000040000 RSI: ffffffff81c134c2 RDI: ffff888026928444 RBP: ffffea000187e400 R08: 0000000000000001 R09: fffffbfff283f47d R10: ffffffff941fa3ef R11: 0000000000000000 R12: ffff888049094458 R13: ffffea000187e400 R14: 00000000fffffffb R15: 00000000fffffffb FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5e87b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c00173f000 CR3: 00000000289ea000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __extent_writepage fs/btrfs/extent_io.c:1519 [inline] extent_write_cache_pages+0x10fd/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 filemap_fdatawrite_wbc mm/filemap.c:397 [inline] filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430 btrfs_fdatawrite_range+0x4a/0x110 fs/btrfs/file.c:4066 start_ordered_ops.constprop.0+0x96/0xe0 fs/btrfs/file.c:1753 btrfs_sync_file+0x1fd/0xe10 fs/btrfs/file.c:1828 vfs_fsync_range+0x141/0x230 fs/sync.c:188 generic_write_sync include/linux/fs.h:2794 [inline] btrfs_do_write_iter+0x584/0x10c0 fs/btrfs/file.c:1705 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6b6/0x1140 fs/read_write.c:590 ksys_write+0x12f/0x260 fs/read_write.c:643 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72b6579 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 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e875ac EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000100 RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_unlock mm/filemap.c:1507 [inline] RIP: 0010:folio_unlock+0xb3/0xd0 mm/filemap.c:1502 Code: 33 5b cd ff 48 89 ef 31 f6 e8 59 eb ff ff 5b 5d e9 22 5b cd ff e8 1d 5b cd ff 48 c7 c6 20 b8 37 8b 48 89 ef e8 4e 21 11 00 90 <0f> 0b 48 89 df e8 d3 8d 2a 00 e9 7b ff ff ff 66 66 2e 0f 1f 84 00 RSP: 0018:ffffc90002d17258 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9002b410000 RDX: 0000000000040000 RSI: ffffffff81c134c2 RDI: ffff888026928444 RBP: ffffea000187e400 R08: 0000000000000001 R09: fffffbfff283f47d R10: ffffffff941fa3ef R11: 0000000000000000 R12: ffff888049094458 R13: ffffea000187e400 R14: 00000000fffffffb R15: 00000000fffffffb FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:00000000f5e87b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f5ea8ba8 CR3: 00000000289ea000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi