Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 45.968759] can: request_module (can-proto-0) failed. [ 45.971275] can: request_module (can-proto-0) failed. [ 46.688504] IPVS: ftp: loaded support on port[0] = 21 [ 46.922524] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.950695] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 47.062090] tipc: TX() has been purged, node left! [ 47.655214] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. 2020/08/27 04:25:44 parsed 1 programs 2020/08/27 04:25:44 executed programs: 0 [ 53.761461] IPVS: ftp: loaded support on port[0] = 21 [ 53.763688] IPVS: ftp: loaded support on port[0] = 21 [ 53.769579] IPVS: ftp: loaded support on port[0] = 21 [ 53.776064] IPVS: ftp: loaded support on port[0] = 21 [ 53.784177] IPVS: ftp: loaded support on port[0] = 21 [ 53.786870] IPVS: ftp: loaded support on port[0] = 21 [ 53.812062] hfs: unable to locate alternate MDB [ 53.816812] hfs: continuing without an alternate MDB [ 53.833844] hfs: new node 0 already hashed? [ 53.838261] ------------[ cut here ]------------ [ 53.843049] WARNING: CPU: 1 PID: 3661 at fs/hfs/bnode.c:416 hfs_bnode_create.cold.13+0xe/0x1b [ 53.851737] Kernel panic - not syncing: panic_on_warn set ... [ 53.857604] CPU: 1 PID: 3661 Comm: syz-executor4 Not tainted 5.9.0-rc2-syzkaller #0 [ 53.865376] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.874713] Call Trace: [ 53.877280] dump_stack+0xb9/0xf1 [ 53.880717] panic+0x115/0x30c [ 53.883913] ? hfs_bnode_create.cold.13+0xe/0x1b [ 53.888655] __warn.cold.13+0x20/0x26 [ 53.892446] ? hfs_bnode_create.cold.13+0xe/0x1b [ 53.894151] hfs: unable to locate alternate MDB [ 53.897185] report_bug+0xc5/0x100 [ 53.897194] handle_bug+0x39/0xa0 [ 53.897197] exc_invalid_op+0x18/0x70 [ 53.897202] asm_exc_invalid_op+0x12/0x20 [ 53.897206] RIP: 0010:hfs_bnode_create.cold.13+0xe/0x1b [ 53.897208] Code: f6 e8 5a aa c6 ff e9 22 f6 ff ff 48 c7 c7 38 19 9a 83 e8 49 aa c6 ff e9 1a fd ff ff 89 de 48 c7 c7 88 19 9a 83 e8 36 aa c6 ff <0f> 0b e9 47 ff ff ff cc cc cc cc cc cc 55 48 89 e5 41 57 41 56 49 [ 53.897210] RSP: 0018:ffffc900003d7bd8 EFLAGS: 00010246 [ 53.897213] RAX: 000000000000001f RBX: 0000000000000000 RCX: 0000000000000000 [ 53.897215] RDX: 0000000000000000 RSI: ffff888218518e20 RDI: ffff888218518e20 [ 53.897217] RBP: ffffc900003d7c08 R08: 0000000000000001 R09: 0000000000000001 [ 53.897218] R10: 0000000000000001 R11: a6bbbf94605eafa6 R12: ffff8882093f10e0 [ 53.897220] R13: ffff888207f13840 R14: ffff8882093f1000 R15: ffff888207f13840 [ 53.897227] ? hfs_bnode_create.cold.13+0xe/0x1b [ 53.901880] hfs: continuing without an alternate MDB [ 53.905397] hfs_bmap_alloc+0x218/0x270 [ 53.905402] hfs_bnode_split+0x37/0x390 [ 53.905405] ? _cond_resched+0x14/0x30 [ 53.905409] hfs_brec_insert+0xce/0x370 [ 53.905415] hfs_cat_create+0x298/0x2f0 [ 53.905422] hfs_mkdir+0x3c/0xa0 [ 53.924247] hfs: unable to locate alternate MDB [ 53.940964] vfs_mkdir+0x10d/0x1c0 [ 53.940969] do_mkdirat+0xe3/0x110 [ 53.940974] __x64_sys_mkdir+0x16/0x20 [ 53.940979] do_syscall_64+0x37/0x80 [ 53.940983] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.940987] RIP: 0033:0x4554a9 [ 53.940990] 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 [ 53.940992] RSP: 002b:00007fb682c96c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 53.940995] RAX: ffffffffffffffda RBX: 00007fb682c976d4 RCX: 00000000004554a9 [ 53.940996] RDX: 0000000000000000 RSI: 0000000000000021 RDI: 0000000020000180 [ 53.940998] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 53.941000] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 53.941001] R13: 00000000000003ea R14: 00000000006f8e90 R15: 0000000000000000 [ 53.946873] Kernel Offset: disabled [ 54.110377] Rebooting in 86400 seconds..