syzbot


WARNING in iomap_apply

Status: upstream: reported on 2023/02/14 11:53
Subsystems: xfs
[Documentation on labels]
Reported-by: syzbot+7f1cc5dbfd63c85dff42@syzkaller.appspotmail.com
First crash: 408d, last: 408d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in iomap_apply iomap C done 25 1407d 1447d 15/26 fixed on 2020/07/20 12:39

Sample crash report:
audit: type=1804 audit(1676375605.954:10): pid=10143 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir2315737806/syzkaller.gk3fas/8/bus/bus" dev="loop1" ino=263 res=1
audit: type=1804 audit(1676375605.954:11): pid=10143 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir2315737806/syzkaller.gk3fas/8/bus/bus" dev="loop1" ino=263 res=1
------------[ cut here ]------------
audit: type=1800 audit(1676375605.964:12): pid=10152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="loop5" ino=42 res=0
WARNING: CPU: 1 PID: 10152 at fs/iomap.c:70 iomap_apply.cold+0x11/0x3e fs/iomap.c:70
audit: type=1800 audit(1676375605.964:13): pid=10152 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="loop5" ino=42 res=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 10152 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:iomap_apply.cold+0x11/0x3e fs/iomap.c:70
Code: f9 48 c7 c7 a0 40 76 88 49 c7 c5 ea ff ff ff e8 1e d0 fe ff e9 fd 77 c8 f9 e8 a9 9e 6d f9 48 c7 c7 c0 43 76 88 e8 08 d0 fe ff <0f> 0b 49 c7 c4 fb ff ff ff e9 6e eb c8 f9 e8 8a 9e 6d f9 48 c7 c7
RSP: 0018:ffff88809f40fb40 EFLAGS: 00010282
RAX: 0000000000000024 RBX: ffffffff889c73c0 RCX: 0000000000000000
RDX: 000000000000f812 RSI: ffffffff814dff01 RDI: ffffed1013e81f5a
RBP: fffffffffffffe00 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000200 R14: ffff888043208460 R15: ffff88809f40fba0
 iomap_bmap+0x10c/0x170 fs/iomap.c:2184
 xfs_vm_bmap+0x197/0x440 fs/xfs/xfs_aops.c:988
 ioctl_fibmap fs/ioctl.c:67 [inline]
 file_ioctl fs/ioctl.c:493 [inline]
 do_vfs_ioctl+0xf0c/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1e2c3a90f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1e2a91b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1e2c4c8f80 RCX: 00007f1e2c3a90f9
RDX: 00000000200000c0 RSI: 0000000000000001 RDI: 0000000000000009
RBP: 00007f1e2c404ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf92b083f R14: 00007f1e2a91b300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/14 11:53 linux-4.19.y 3f8a27f9e27b 93ae7e0a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 WARNING in iomap_apply
* Struck through repros no longer work on HEAD.