syzbot


WARNING in hfs_bnode_create

Status: upstream: reported C repro on 2018/04/04 03:02
Reported-by: syzbot+a19ca73b21fe8bc69101@syzkaller.appspotmail.com
First crash: 1701d, last: 3d04h

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: no output from test machine (log)
Repro: C syz .config

Fix bisection: failed (bisect log)
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in hfs_bnode_create C 1 4d16h 4d16h 0/1 upstream: reported C repro on 2022/11/26 06:17
Patch testing requests:
Created Duration User Patch Repo Result
2022/09/27 06:30 11m upstream error
2022/04/09 19:20 5m phil@philpotter.co.uk upstream error

Sample crash report:
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007ffde9a45690 R08: 0000000000000002 R09: 00007ffde9a456a0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffde9a456d0 R14: 00007ffde9a456b0 R15: 0000000000000134
 </TASK>
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3955 at fs/hfs/bnode.c:421 hfs_bnode_create+0x3d4/0x460 fs/hfs/bnode.c:420
Modules linked in:
CPU: 1 PID: 3955 Comm: syz-executor286 Not tainted 6.1.0-rc6-syzkaller-00315-gfaf68e3523c2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:hfs_bnode_create+0x3d4/0x460 fs/hfs/bnode.c:421
Code: 31 c0 e8 5b fe 31 08 e9 5f fd ff ff e8 55 6a 2c ff 4c 89 ff e8 3d 69 3d 08 48 c7 c7 20 de 07 8b 44 89 e6 31 c0 e8 38 fe 31 08 <0f> 0b eb b1 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 61 fc ff ff 48 89
RSP: 0018:ffffc9000425ef90 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88801916f400 RCX: c4d3206178de5900
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff816e55cd R09: fffff5200084bd69
R10: fffff5200084bd69 R11: 1ffff9200084bd68 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88802750e000 R15: ffff88802750e0e0
FS:  0000555555b7f300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020004200 CR3: 000000007e547000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x598/0x620 fs/hfs/btree.c:291
 hfs_btree_inc_height+0xec/0xca0 fs/hfs/brec.c:471
 hfs_brec_insert+0x74a/0xc00 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x2a6/0x460 fs/hfs/extent.c:124
 __hfs_ext_cache_extent+0x67/0x980 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x323/0x1420 fs/hfs/extent.c:401
 hfs_get_block+0x3fc/0xbb0 fs/hfs/extent.c:353
 __block_write_begin_int+0x54c/0x1a80 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x93/0x1e0 fs/buffer.c:2102
 cont_write_begin+0x606/0x860 fs/buffer.c:2456
 hfs_write_begin+0x86/0xd0 fs/hfs/inode.c:58
 generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3753
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3881
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3913
 call_write_iter include/linux/fs.h:2191 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7dc/0xc50 fs/read_write.c:584
 ksys_write+0x177/0x2a0 fs/read_write.c:637
 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: 0033:0x7f0fa5191c89
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 18 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:00007ffde9a45668 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0fa5191c89
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007ffde9a45690 R08: 0000000000000002 R09: 00007ffde9a456a0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffde9a456d0 R14: 00007ffde9a456b0 R15: 0000000000000134
 </TASK>

Crashes (9):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-fs 2022/11/27 18:44 upstream faf68e3523c2 f4470a7b .config log report syz C WARNING in hfs_bnode_create
ci2-upstream-fs 2022/11/25 15:29 upstream c3eb11fbb826 74a66371 .config log report syz C WARNING in hfs_bnode_create
ci-upstream-kasan-gce-root 2022/11/25 13:42 upstream 08ad43d554ba 74a66371 .config log report syz C WARNING in hfs_bnode_create
ci-upstream-gce-arm64 2022/11/27 11:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6d464646530f 74a66371 .config log report syz C WARNING in hfs_bnode_create
ci-upstream-kasan-gce-root 2018/04/04 01:26 upstream f2d285669aae 676bd07e .config log report syz C
ci2-upstream-fs 2022/11/27 12:03 upstream faf68e3523c2 f4470a7b .config log report info WARNING in hfs_bnode_create
ci2-upstream-fs 2022/11/26 13:58 upstream 08ad43d554ba f4470a7b .config log report info WARNING in hfs_bnode_create
ci-upstream-kasan-gce-root 2022/11/26 02:31 upstream 0b1dcc2cf55a 74a66371 .config log report info WARNING in hfs_bnode_create
ci-upstream-kasan-gce-root 2022/11/25 13:27 upstream 08ad43d554ba 74a66371 .config log report info WARNING in hfs_bnode_create
* Struck through repros no longer work on HEAD.