bisecting fixing commit since f2d285669aae656dfeafa0bf25e86bbbc5d22329
building syzkaller on 676bd07e7e80f8a270af7f0276443c68f4a99e25
testing commit f2d285669aae656dfeafa0bf25e86bbbc5d22329 with gcc (GCC) 8.1.0
kernel signature: 28fb24079656274109579038dbef0586b3a1c074
run #0: crashed: WARNING in hfs_bnode_create
run #1: crashed: WARNING in hfs_bnode_create
run #2: crashed: WARNING in hfs_bnode_create
run #3: crashed: WARNING in hfs_bnode_create
run #4: crashed: WARNING in hfs_bnode_create
run #5: crashed: WARNING in hfs_bnode_create
run #6: crashed: WARNING in corrupted
run #7: crashed: WARNING in hfs_bnode_create
run #8: crashed: WARNING in hfs_bnode_create
run #9: crashed: WARNING in hfs_bnode_create
testing current HEAD 6794862a16ef41f753abd75c03a152836e4c8028
testing commit 6794862a16ef41f753abd75c03a152836e4c8028 with gcc (GCC) 8.1.0
kernel signature: 9f4f1ae4f49bd2cd5a2f7b53cd71f38cde69343e
run #0: crashed: WARNING in corrupted
run #1: crashed: WARNING in corrupted
run #2: crashed: WARNING in hfs_bnode_create
run #3: crashed: WARNING in hfs_bnode_create
run #4: crashed: WARNING in hfs_bnode_create
run #5: crashed: WARNING in corrupted
run #6: crashed: WARNING in hfs_bnode_create
run #7: crashed: WARNING in corrupted
run #8: crashed: WARNING in hfs_bnode_create
run #9: crashed: WARNING in hfs_bnode_create
revisions tested: 2, total time: 16m51.742708015s (build: 10m3.588020585s, test: 6m5.05042213s)
the crash still happens on HEAD
commit msg: Merge tag 'for-5.5-rc1-kconfig-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
crash: WARNING in hfs_bnode_create
IPVS: ftp: loaded support on port[0] = 21
hfs: unable to locate alternate MDB
hfs: continuing without an alternate MDB
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4441 at fs/hfs/bnode.c:416 hfs_bnode_create.cold.12+0xe/0x15 fs/hfs/bnode.c:415
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 4441 Comm: syz-executor4 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12f/0x187 lib/dump_stack.c:118
 panic+0x22a/0x4f5 kernel/panic.c:221
 __warn.cold.10+0x25/0x28 kernel/panic.c:582
 report_bug+0x1b0/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:hfs_bnode_create.cold.12+0xe/0x15 fs/hfs/bnode.c:416
Code: db e8 aa 53 5a ff e9 5e e0 ff ff 48 c7 c7 e0 90 3a 87 e8 99 53 5a ff e9 8f f6 ff ff 89 de 48 c7 c7 20 91 3a 87 e8 86 53 5a ff <0f> 0b e9 c8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41
RSP: 0018:ffff8881c5ab7880 EFLAGS: 00010282
RAX: 000000000000001f RBX: 0000000000000000 RCX: ffffffff82d7e28e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881db129dec
RBP: ffff8881c5ab78c8 R08: ffffed103b626631 R09: ffffed103b626631
R10: ffffed103b626630 R11: ffff8881db133187 R12: ffff8881c94520d0
R13: dffffc0000000000 R14: ffff8881d39a7f00 R15: ffff8881d39a7f00
 hfs_bmap_alloc+0x423/0x5d0 fs/hfs/btree.c:288
 hfs_bnode_split+0xbd/0xe20 fs/hfs/brec.c:241
 hfs_brec_insert+0x2f0/0xbb0 fs/hfs/brec.c:102
 hfs_cat_create+0x697/0x880 fs/hfs/catalog.c:131
 hfs_mkdir+0x57/0xc0 fs/hfs/dir.c:231
 vfs_mkdir+0x384/0x600 fs/namei.c:3819
 do_mkdirat+0x1b7/0x210 fs/namei.c:3842
 __do_sys_mkdir fs/namei.c:3858 [inline]
 __se_sys_mkdir fs/namei.c:3856 [inline]
 __x64_sys_mkdir+0x57/0x80 fs/namei.c:3856
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455429
Code: 1d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f62a00eec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f62a00ef6d4 RCX: 0000000000455429
RDX: 0000000000000000 RSI: 0000000000000021 RDI: 0000000020000180
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000003ea R14: 00000000006f8e90 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..