syzbot


kernel BUG in iomap_read_inline_data

Status: upstream: reported C repro on 2022/11/28 17:50
Reported-by: syzbot+bcecad5667aa0b8b55d8@syzkaller.appspotmail.com
First crash: 542d, last: 542d
Fix bisection: failed (error log, bisect log)
  

Sample crash report:
gfs2: fsid=syz:syz.0: jid=0, already locked for use
gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
gfs2: fsid=syz:syz.0: jid=0: Done
gfs2: fsid=syz:syz.0: first mount done, others may mount
------------[ cut here ]------------
kernel BUG at fs/iomap.c:277!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8129 Comm: syz-executor287 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:iomap_read_inline_data.isra.0+0x2b4/0x320 fs/iomap.c:277
Code: e8 f1 fb a4 ff e8 96 b3 42 ff eb 99 e8 e5 fb a4 ff 48 8b 1c 24 48 83 eb 01 e9 b8 fd ff ff e8 d3 fb a4 ff 0f 0b e8 cc fb a4 ff <0f> 0b e8 25 d8 da ff e9 b3 fe ff ff e8 1b d8 da ff e9 40 ff ff ff
RSP: 0018:ffff888091c5f060 EFLAGS: 00010293
RAX: ffff8880b164e000 RBX: 0000000000000f18 RCX: ffffffff81bd881a
RDX: 0000000000000000 RSI: ffffffff81bd89a4 RDI: 0000000000000006
RBP: ffffea0002236f40 R08: ffff888091c5f1e8 R09: 00000040000000c0
R10: 0000000000000006 R11: 0000000000000000 R12: 00000040000000c0
R13: ffff888091c5f1e8 R14: ffffea0002236f48 R15: ffff888091c5f218
FS:  0000555556976300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558604d56848 CR3: 00000000aa812000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 iomap_readpage_actor+0xa95/0xdb0 fs/iomap.c:320
 iomap_apply+0x18b/0x290 fs/iomap.c:87
 iomap_readpage+0x131/0x3f0 fs/iomap.c:393
 __gfs2_readpage+0x23e/0x2c0 fs/gfs2/aops.c:516
 do_read_cache_page+0x533/0x1170 mm/filemap.c:2828
 gfs2_internal_read+0xed/0x4d0 fs/gfs2/aops.c:590
 read_rindex_entry+0x1ea/0x13d0 fs/gfs2/rgrp.c:910
 gfs2_ri_update+0x73/0x580 fs/gfs2/rgrp.c:1006
 gfs2_rindex_update+0x3ba/0x430 fs/gfs2/rgrp.c:1056
 init_inodes+0x1061/0x1cf0 fs/gfs2/ops_fstype.c:819
 fill_super+0x18a6/0x2550 fs/gfs2/ops_fstype.c:1153
 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1a2a9a9dea
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 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:00007ffec359db58 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1a2a9a9dea
RDX: 00000000200124c0 RSI: 0000000020012500 RDI: 00007ffec359db60
RBP: 00007ffec359db60 R08: 00007ffec359dba0 R09: 0000000000012511
R10: 0000000000000819 R11: 0000000000000282 R12: 0000000000000004
R13: 00005555569762c0 R14: 00007ffec359dba0 R15: 0000000000000000
Modules linked in:
---[ end trace 89cd7189b8b97422 ]---
RIP: 0010:iomap_read_inline_data.isra.0+0x2b4/0x320 fs/iomap.c:277
Code: e8 f1 fb a4 ff e8 96 b3 42 ff eb 99 e8 e5 fb a4 ff 48 8b 1c 24 48 83 eb 01 e9 b8 fd ff ff e8 d3 fb a4 ff 0f 0b e8 cc fb a4 ff <0f> 0b e8 25 d8 da ff e9 b3 fe ff ff e8 1b d8 da ff e9 40 ff ff ff
RSP: 0018:ffff888091c5f060 EFLAGS: 00010293
RAX: ffff8880b164e000 RBX: 0000000000000f18 RCX: ffffffff81bd881a
RDX: 0000000000000000 RSI: ffffffff81bd89a4 RDI: 0000000000000006
RBP: ffffea0002236f40 R08: ffff888091c5f1e8 R09: 00000040000000c0
R10: 0000000000000006 R11: 0000000000000000 R12: 00000040000000c0
R13: ffff888091c5f1e8 R14: ffffea0002236f48 R15: ffff888091c5f218
FS:  0000555556976300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9e4003c0d8 CR3: 00000000aa812000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/11/28 17:49 linux-4.19.y 3f8a27f9e27b 247de55b .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 kernel BUG in iomap_read_inline_data
* Struck through repros no longer work on HEAD.