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WARNING in hfsplus_bnode_create

Status: upstream: reported C repro on 2022/12/29 14:39
Subsystems: hfsplus
[Documentation on labels]
Reported-by: syzbot+a55a48f369871ee9f90d@syzkaller.appspotmail.com
First crash: 1261d, last: 1223d
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in hfsplus_bnode_create hfs -1 C error 1338 60d 1289d 29/29 fixed on 2026/05/21 13:51
linux-5.15 WARNING in hfsplus_bnode_create origin:upstream -1 C error 58 6d09h 1126d 0/3 upstream: reported C repro on 2023/05/13 19:31
upstream WARNING in hfsplus_bnode_create (2) hfs prio:low -1 C error 6 4d04h 14d 0/29 upstream: reported C repro on 2026/05/29 20:01
linux-4.19 WARNING in hfsplus_bnode_create hfsplus -1 C error 5 1222d 1291d 0/1 upstream: reported C repro on 2022/11/30 07:43
linux-6.1 WARNING in hfsplus_bnode_create origin:upstream missing-backport -1 C error 44 29d 1145d 0/3 upstream: reported C repro on 2023/04/25 07:57
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/02/02 13:23 23m (2) bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
hfsplus: xattr searching failed
hfsplus: xattr searching failed
audit: type=1800 audit(1672324642.219:2): pid=8012 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor272" name="file1" dev="loop0" ino=20 res=0
hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8012 at fs/hfsplus/bnode.c:588 hfsplus_bnode_create.cold+0x1b/0x42 fs/hfsplus/bnode.c:587
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8012 Comm: syz-executor272 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:hfsplus_bnode_create.cold+0x1b/0x42 fs/hfsplus/bnode.c:588
RSP: 0018:ffff8880b2c071a8 EFLAGS: 00010286
RAX: 0000000000000023 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016580e2b
RBP: 0000000000000000 R08: 0000000000000023 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ab8ab900
R13: ffff8880b2a8aa80 R14: ffff8880b2a8ab50 R15: 0000000000000007
 hfsplus_bmap_alloc+0x5db/0x740 fs/hfsplus/btree.c:414
 hfs_btree_inc_height.isra.0+0xb7/0x910 fs/hfsplus/brec.c:474
 hfsplus_brec_insert+0x8f3/0xb30 fs/hfsplus/brec.c:75
 __hfsplus_ext_write_extent+0x439/0x560 fs/hfsplus/extents.c:107
 __hfsplus_ext_cache_extent fs/hfsplus/extents.c:186 [inline]
 hfsplus_ext_read_extent+0x81a/0x9e0 fs/hfsplus/extents.c:218
 hfsplus_file_extend+0x616/0xef0 fs/hfsplus/extents.c:456
 hfsplus_get_block+0x15b/0x820 fs/hfsplus/extents.c:245
 get_more_blocks fs/direct-io.c:718 [inline]
 do_direct_IO fs/direct-io.c:1004 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1337 [inline]
 __blockdev_direct_IO+0x3f74/0xdcb0 fs/direct-io.c:1423
 blockdev_direct_IO include/linux/fs.h:2994 [inline]
 hfsplus_direct_IO+0x10a/0x290 fs/hfsplus/inode.c:135
 generic_file_direct_write+0x1df/0x420 mm/filemap.c:2958
 __generic_file_write_iter+0x2a2/0x590 mm/filemap.c:3137
 generic_file_write_iter+0x36f/0x650 mm/filemap.c:3208
 call_write_iter include/linux/fs.h:1780 [inline]
 do_iter_readv_writev+0x4cf/0x5f0 fs/read_write.c:675
 do_iter_write+0x152/0x550 fs/read_write.c:954
 vfs_writev+0x125/0x290 fs/read_write.c:999
 do_pwritev fs/read_write.c:1088 [inline]
 SYSC_pwritev2 fs/read_write.c:1147 [inline]
 SyS_pwritev2+0x195/0x230 fs/read_write.c:1138
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f11e8f2d7d9
RSP: 002b:00007ffe20835578 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f11e8f2d7d9
RDX: 0000000000000001 RSI: 0000000020000680 RDI: 0000000000000004
RBP: 00007f11e8eed070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000600 R11: 0000000000000246 R12: 00007f11e8eed100
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
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
2022/12/29 14:39 linux-4.14.y c4215ee4771b 44712fbc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-4-14 WARNING in hfsplus_bnode_create
* Struck through repros no longer work on HEAD.