bisecting fixing commit since f2d285669aae656dfeafa0bf25e86bbbc5d22329 building syzkaller on 676bd07e7e80f8a270af7f0276443c68f4a99e25 testing commit f2d285669aae656dfeafa0bf25e86bbbc5d22329 with gcc (GCC) 8.1.0 kernel signature: f3c5f8e10ff080d0628224d96666dd140e1e542b64994e8185bfcb2a11cabfad run #0: crashed: WARNING in hfs_bnode_create 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 hfs_bnode_create run #6: crashed: WARNING in hfs_bnode_create 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 04300d66f0a06d572d9f2ad6768c38cabde22179 testing commit 04300d66f0a06d572d9f2ad6768c38cabde22179 with gcc (GCC) 8.1.0 kernel signature: 81217d2eae2f1f443d450c07ea90eba5b6231d33b2306abc42c8fb37a85549d9 run #0: crashed: WARNING in corrupted 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 hfs_bnode_create run #7: crashed: WARNING in hfs_bnode_create run #8: crashed: WARNING in hfs_bnode_create run #9: crashed: WARNING in corrupted revisions tested: 2, total time: 15m4.377049352s (build: 8m30.494377937s, test: 5m53.75420198s) the crash still happens on HEAD commit msg: Merge tag 'riscv-for-linus-5.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux into master crash: WARNING in corrupted IPVS: ftp: loaded support on port[0] = 21 hfs: new node 0 already hashed? hfs: new node 0 already hashed? ------------[ cut here ]------------ ------------[ cut here ]------------ WARNING: CPU: 1 PID: 3660 at fs/hfs/bnode.c:416 hfs_bnode_create.cold.13+0xe/0x1b fs/hfs/bnode.c:415 WARNING: CPU: 0 PID: 3659 at fs/hfs/bnode.c:416 hfs_bnode_create.cold.13+0xe/0x1b fs/hfs/bnode.c:415 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 3659 Comm: syz-executor3 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Modules linked in: Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xb9/0xf1 lib/dump_stack.c:118 panic+0x115/0x30c kernel/panic.c:231 CPU: 1 PID: 3660 Comm: syz-executor1 Not tainted 5.8.0-rc6-syzkaller #0 __warn.cold.13+0x20/0x26 kernel/panic.c:600 report_bug+0xc5/0x100 lib/bug.c:198 handle_bug+0x39/0xa0 arch/x86/kernel/traps.c:235 exc_invalid_op+0x18/0x70 arch/x86/kernel/traps.c:255 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540 RIP: 0010:hfs_bnode_create.cold.13+0xe/0x1b fs/hfs/bnode.c:416 Code: f6 e8 9a 2a c7 ff e9 22 f6 ff ff 48 c7 c7 f0 46 99 83 e8 89 2a c7 ff e9 1a fd ff ff 89 de 48 c7 c7 40 47 99 83 e8 76 2a c7 ff <0f> 0b e9 47 ff ff ff cc cc cc cc cc cc 55 48 89 e5 41 57 41 56 49 RSP: 0018:ffffc900003cbbd0 EFLAGS: 00010246 RAX: 000000000000001f RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888218418e20 RDI: ffff888218418e20 RIP: 0010:hfs_bnode_create.cold.13+0xe/0x1b fs/hfs/bnode.c:416 RBP: ffffc900003cbc00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8882095720e0 R13: ffff888209552f00 R14: ffff888209572000 R15: ffff888209552f00 hfs_bmap_alloc+0x218/0x270 fs/hfs/btree.c:288 hfs_bnode_split+0x37/0x390 fs/hfs/brec.c:241 Code: f6 e8 9a 2a c7 ff e9 22 f6 ff ff 48 c7 c7 f0 46 99 83 e8 89 2a c7 ff e9 1a fd ff ff 89 de 48 c7 c7 40 47 99 83 e8 76 2a c7 ff <0f> 0b e9 47 ff ff ff cc cc cc cc cc cc 55 48 89 e5 41 57 41 56 49 hfs_brec_insert+0xce/0x370 fs/hfs/brec.c:102 hfs_cat_create+0x298/0x2f0 fs/hfs/catalog.c:131 hfs_mkdir+0x3c/0xa0 fs/hfs/dir.c:231 RSP: 0018:ffffc90000367bd0 EFLAGS: 00010246 vfs_mkdir+0x10d/0x1e0 fs/namei.c:3641 do_mkdirat+0xe3/0x110 fs/namei.c:3664 __do_sys_mkdir fs/namei.c:3680 [inline] __se_sys_mkdir fs/namei.c:3678 [inline] __x64_sys_mkdir+0x16/0x20 fs/namei.c:3678 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RAX: 000000000000001f RBX: 0000000000000000 RCX: 0000000000000000 RIP: 0033:0x4554a9 Code: 9d b9 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 6b b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7baca3fc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f7baca406d4 RCX: 00000000004554a9 RDX: 0000000000000000 RSI: 0000000000000021 RDI: 0000000020000180 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000003ea R14: 00000000006f8e90 R15: 0000000000000000 RDX: 0000000000000000 RSI: ffff888218518e20 RDI: ffff888218518e20 Kernel Offset: disabled Rebooting in 86400 seconds..