RBP: 00007f66a7c43120 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000002 R13: 0000000000000006 R14: 00007f66a6f9bf80 R15: 00007ffe542a0fc8 BTRFS warning (device loop0): direct IO failed ino 263 op 0x8801 offset 0x4000 len 4096 err no 9 BUG: kernel NULL pointer dereference, address: 0000000000000060 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 104fdb067 P4D 104fdb067 PUD 10430a067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 3004 Comm: syz-executor.0 Not tainted 6.4.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:btrfs_finish_ordered_extent+0x22/0xf0 fs/btrfs/ordered-data.c:375 Code: 0f 1f 84 00 00 00 00 00 66 0f 1f 00 41 57 49 89 f7 41 56 45 0f b6 f0 41 55 49 89 cd 41 54 49 89 d4 55 53 48 89 fb 48 83 ec 08 <48> 8b 6f 60 66 90 65 8b 05 8d c9 6f 7e 89 c0 48 0f a3 05 07 e4 7f RSP: 0018:ffffc900021ffa80 EFLAGS: 00010282 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000001000 RDX: 0000000000004000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88810da56100 R08: 0000000000000000 R09: ffffffff83ca0460 R10: ffffc900021ff8d8 R11: ffffffff83d804a8 R12: 0000000000004000 R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f66a7c436c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000060 CR3: 0000000103b02000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_dio_end_io+0x88/0xc0 fs/btrfs/inode.c:7810 iomap_dio_bio_iter+0x1d0/0x440 fs/iomap/direct-io.c:355 iomap_dio_iter fs/iomap/direct-io.c:438 [inline] __iomap_dio_rw+0x52c/0x8e0 fs/iomap/direct-io.c:598 btrfs_dio_write+0x5a/0x80 fs/btrfs/inode.c:7884 btrfs_direct_write fs/btrfs/file.c:1529 [inline] btrfs_do_write_iter+0x23d/0x560 fs/btrfs/file.c:1670 call_write_iter include/linux/fs.h:1868 [inline] do_iter_readv_writev+0xe4/0x130 fs/read_write.c:735 do_iter_write+0x78/0x1c0 fs/read_write.c:860 vfs_writev+0x108/0x240 fs/read_write.c:933 do_pwritev+0x8e/0xd0 fs/read_write.c:1030 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f66a6e7cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f66a7c430c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f66a6f9bf80 RCX: 00007f66a6e7cb29 RDX: 0000000000000002 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 00007f66a7c43120 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000002 R13: 0000000000000006 R14: 00007f66a6f9bf80 R15: 00007ffe542a0fc8 Modules linked in: CR2: 0000000000000060 ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_finish_ordered_extent+0x22/0xf0 fs/btrfs/ordered-data.c:375 Code: 0f 1f 84 00 00 00 00 00 66 0f 1f 00 41 57 49 89 f7 41 56 45 0f b6 f0 41 55 49 89 cd 41 54 49 89 d4 55 53 48 89 fb 48 83 ec 08 <48> 8b 6f 60 66 90 65 8b 05 8d c9 6f 7e 89 c0 48 0f a3 05 07 e4 7f RSP: 0018:ffffc900021ffa80 EFLAGS: 00010282 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000001000 RDX: 0000000000004000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88810da56100 R08: 0000000000000000 R09: ffffffff83ca0460 R10: ffffc900021ff8d8 R11: ffffffff83d804a8 R12: 0000000000004000 R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f66a7c436c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000060 CR3: 0000000103b02000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: 66 0f 1f 00 nopw (%rax) c: 41 57 push %r15 e: 49 89 f7 mov %rsi,%r15 11: 41 56 push %r14 13: 45 0f b6 f0 movzbl %r8b,%r14d 17: 41 55 push %r13 19: 49 89 cd mov %rcx,%r13 1c: 41 54 push %r12 1e: 49 89 d4 mov %rdx,%r12 21: 55 push %rbp 22: 53 push %rbx 23: 48 89 fb mov %rdi,%rbx 26: 48 83 ec 08 sub $0x8,%rsp * 2a: 48 8b 6f 60 mov 0x60(%rdi),%rbp <-- trapping instruction 2e: 66 90 xchg %ax,%ax 30: 65 8b 05 8d c9 6f 7e mov %gs:0x7e6fc98d(%rip),%eax # 0x7e6fc9c4 37: 89 c0 mov %eax,%eax 39: 48 rex.W 3a: 0f .byte 0xf 3b: a3 .byte 0xa3 3c: 05 .byte 0x5 3d: 07 (bad) 3e: e4 7f in $0x7f,%al