Hello, syzbot found the following issue on: HEAD commit: 02bf43c7b7f7 Merge tag 'fs.xattr.simple.rework.rbtree.rwlo.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1009ecd0480000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c59170b68d26a55 dashboard link: https://syzkaller.appspot.com/bug?extid=bfbc1eecdfb9b10e5792 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1798429d880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=161b948f880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/45f211dceffb/disk-02bf43c7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fd0c63aa3713/vmlinux-02bf43c7.xz kernel image: https://storage.googleapis.com/syzbot-assets/734647e04fd0/bzImage-02bf43c7.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/bd0897600624/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bfbc1eecdfb9b10e5792@xxxxxxxxxxxxxxxxxxxxxxxxx XFS (loop0): Quotacheck: Done. general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 3630 Comm: syz-executor203 Not tainted 6.1.0-syzkaller-03295-g02bf43c7b7f7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:xfs_free_extent_fix_freelist fs/xfs/libxfs/xfs_alloc.c:3358 [inline] RIP: 0010:__xfs_free_extent+0x1f5/0x600 fs/xfs/libxfs/xfs_alloc.c:3407 Code: 00 74 05 e8 bd 96 cc fe 4c 89 ac 24 88 00 00 00 4c 89 7c 24 08 49 8d 5f 08 48 89 d8 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df <42> 8a 04 38 84 c0 0f 85 02 03 00 00 44 8b 23 4c 8d b4 24 80 00 00 RSP: 0018:ffffc90003d9f580 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000000000080 RSI: 0000000000000000 RDI: ffffc90003d9f608 RBP: ffffc90003d9f730 R08: dffffc0000000000 R09: ffffc90003d9f610 R10: fffff520007b3ed2 R11: 1ffff920007b3ec2 R12: 1ffff1100e8a82bf R13: ffff888022c3e000 R14: dffffc0000000000 R15: dffffc0000000000 FS: 0000555555e1a300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9470a976a8 CR3: 000000007dad7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> xfs_free_extent fs/xfs/libxfs/xfs_alloc.h:147 [inline] xfs_ag_extend_space+0x365/0x5a0 fs/xfs/libxfs/xfs_ag.c:985 xfs_growfs_data_private fs/xfs/xfs_fsops.c:151 [inline] xfs_growfs_data+0x959/0x10e0 fs/xfs/xfs_fsops.c:294 xfs_file_ioctl+0xf7f/0x1320 fs/xfs/xfs_ioctl.c:2068 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f23555938c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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:00007ffc24b23568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f23555938c9 RDX: 0000000020000200 RSI: 000000004010586e RDI: 0000000000000004 RBP: 00007f2355553160 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000095cb R11: 0000000000000246 R12: 00007f23555531f0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:xfs_free_extent_fix_freelist fs/xfs/libxfs/xfs_alloc.c:3358 [inline] RIP: 0010:__xfs_free_extent+0x1f5/0x600 fs/xfs/libxfs/xfs_alloc.c:3407 Code: 00 74 05 e8 bd 96 cc fe 4c 89 ac 24 88 00 00 00 4c 89 7c 24 08 49 8d 5f 08 48 89 d8 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df <42> 8a 04 38 84 c0 0f 85 02 03 00 00 44 8b 23 4c 8d b4 24 80 00 00 RSP: 0018:ffffc90003d9f580 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000000000080 RSI: 0000000000000000 RDI: ffffc90003d9f608 RBP: ffffc90003d9f730 R08: dffffc0000000000 R09: ffffc90003d9f610 R10: fffff520007b3ed2 R11: 1ffff920007b3ec2 R12: 1ffff1100e8a82bf R13: ffff888022c3e000 R14: dffffc0000000000 R15: dffffc0000000000 FS: 0000555555e1a300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9470a976a8 CR3: 000000007dad7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 74 05 e8 add %dh,-0x18(%rbp,%rax,1) 4: bd 96 cc fe 4c mov $0x4cfecc96,%ebp 9: 89 ac 24 88 00 00 00 mov %ebp,0x88(%rsp) 10: 4c 89 7c 24 08 mov %r15,0x8(%rsp) 15: 49 8d 5f 08 lea 0x8(%r15),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 27: fc ff df * 2a: 42 8a 04 38 mov (%rax,%r15,1),%al <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 02 03 00 00 jne 0x338 36: 44 8b 23 mov (%rbx),%r12d 39: 4c rex.WR 3a: 8d .byte 0x8d 3b: b4 24 mov $0x24,%ah 3d: 80 00 00 addb $0x0,(%rax) --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
