Hello, syzbot found the following issue on: HEAD commit: 3f01e9fed845 Merge tag 'linux-watchdog-6.5-rc2' of git://w.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=117b9b6ca80000 kernel config: https://syzkaller.appspot.com/x/.config?x=29fd3392a08741ef dashboard link: https://syzkaller.appspot.com/bug?extid=5b82f0e951f8c2bcdb8f compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12f5014ca80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f5adb0a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d8b0db7be621/disk-3f01e9fe.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e54c8d8a4367/vmlinux-3f01e9fe.xz kernel image: https://storage.googleapis.com/syzbot-assets/a266546d6979/bzImage-3f01e9fe.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/954ae8a07707/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5b82f0e951f8c2bcdb8f@xxxxxxxxxxxxxxxxxxxxxxxxx RBP: 00007ffef40699e0 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000006 R13: 00007ffef4069a20 R14: 00007ffef4069a00 R15: 0000000000000004 </TASK> BTRFS warning (device loop0): direct IO failed ino 263 op 0x8801 offset 0x4000 len 4096 err no 9 general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 1 PID: 5096 Comm: syz-executor315 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:btrfs_finish_ordered_extent+0x43/0x3c0 fs/btrfs/ordered-data.c:375 Code: 4c 24 10 48 89 54 24 08 48 89 74 24 18 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 b8 4e f9 fd 49 8d 6e 60 49 89 ec 49 c1 ec 03 <41> 80 3c 1c 00 74 08 48 89 ef e8 7e 04 52 fe 4c 8b 7d 00 49 8d 9f RSP: 0018:ffffc90003dcf438 EFLAGS: 00010206 RAX: ffffffff8392b4f8 RBX: dffffc0000000000 RCX: ffff888020f01dc0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000060 R08: 0000000000000000 R09: ffffffff838ef2c7 R10: 0000000000000003 R11: ffff888020f01dc0 R12: 000000000000000c R13: 0000000000001000 R14: 0000000000000000 R15: ffff88814c43c300 FS: 0000555555a85300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8a9d884140 CR3: 0000000079cdb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> btrfs_dio_end_io+0x171/0x470 fs/btrfs/inode.c:7810 iomap_dio_submit_bio fs/iomap/direct-io.c:75 [inline] iomap_dio_bio_iter+0xe15/0x1430 fs/iomap/direct-io.c:347 __iomap_dio_rw+0x11fa/0x2250 fs/iomap/direct-io.c:575 btrfs_dio_write+0xb6/0x100 fs/btrfs/inode.c:7884 btrfs_direct_write fs/btrfs/file.c:1526 [inline] btrfs_do_write_iter+0x61c/0x1020 fs/btrfs/file.c:1667 do_iter_write+0x84f/0xde0 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_pwritev+0x21a/0x360 fs/read_write.c:1030 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f8a9d80cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffef40699a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f8a9d80cb29 RDX: 0000000000000002 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 00007ffef40699e0 R08: 0000000000000000 R09: 0000000000000008 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000006 R13: 00007ffef4069a20 R14: 00007ffef4069a00 R15: 0000000000000004 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_finish_ordered_extent+0x43/0x3c0 fs/btrfs/ordered-data.c:375 Code: 4c 24 10 48 89 54 24 08 48 89 74 24 18 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 b8 4e f9 fd 49 8d 6e 60 49 89 ec 49 c1 ec 03 <41> 80 3c 1c 00 74 08 48 89 ef e8 7e 04 52 fe 4c 8b 7d 00 49 8d 9f RSP: 0018:ffffc90003dcf438 EFLAGS: 00010206 RAX: ffffffff8392b4f8 RBX: dffffc0000000000 RCX: ffff888020f01dc0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000060 R08: 0000000000000000 R09: ffffffff838ef2c7 R10: 0000000000000003 R11: ffff888020f01dc0 R12: 000000000000000c R13: 0000000000001000 R14: 0000000000000000 R15: ffff88814c43c300 FS: 0000555555a85300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005609e4054978 CR3: 0000000079cdb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4c 24 10 rex.WR and $0x10,%al 3: 48 89 54 24 08 mov %rdx,0x8(%rsp) 8: 48 89 74 24 18 mov %rsi,0x18(%rsp) d: 49 89 fe mov %rdi,%r14 10: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 17: fc ff df 1a: e8 b8 4e f9 fd callq 0xfdf94ed7 1f: 49 8d 6e 60 lea 0x60(%r14),%rbp 23: 49 89 ec mov %rbp,%r12 26: 49 c1 ec 03 shr $0x3,%r12 * 2a: 41 80 3c 1c 00 cmpb $0x0,(%r12,%rbx,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 ef mov %rbp,%rdi 34: e8 7e 04 52 fe callq 0xfe5204b7 39: 4c 8b 7d 00 mov 0x0(%rbp),%r15 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: 9f lahf --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
