INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-mmots-kasan-gce-7,10.128.15.222' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.100978] ------------[ cut here ]------------ [ 58.101838] WARNING: CPU: 0 PID: 2993 at mm/slab_common.c:1001 kmalloc_slab+0x5d/0x70 [ 58.103104] Kernel panic - not syncing: panic_on_warn set ... [ 58.103104] [ 58.104127] CPU: 0 PID: 2993 Comm: syzkaller880153 Not tainted 4.14.0-rc5-mm1+ #20 [ 58.105138] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.106364] Call Trace: [ 58.106747] dump_stack+0x194/0x257 [ 58.107242] ? arch_local_irq_restore+0x53/0x53 [ 58.107870] ? vsnprintf+0x1ed/0x1900 [ 58.108402] panic+0x1e4/0x41c [ 58.108841] ? refcount_error_report+0x214/0x214 [ 58.109491] ? show_regs_print_info+0x65/0x65 [ 58.110099] ? __warn+0x1a9/0x1e0 [ 58.110574] ? kmalloc_slab+0x5d/0x70 [ 58.111086] __warn+0x1c4/0x1e0 [ 58.111533] ? kmalloc_slab+0x5d/0x70 [ 58.112047] report_bug+0x211/0x2d0 [ 58.112545] fixup_bug+0x40/0x90 [ 58.113003] do_trap+0x260/0x390 [ 58.113503] do_error_trap+0x120/0x390 [ 58.114034] ? do_trap+0x390/0x390 [ 58.114536] ? kmalloc_slab+0x5d/0x70 [ 58.115055] ? __lock_is_held+0xb6/0x140 [ 58.115607] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 58.116259] do_invalid_op+0x1b/0x20 [ 58.116772] invalid_op+0x18/0x20 [ 58.117238] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 58.117826] RSP: 0018:ffff8801d2077670 EFLAGS: 00010246 [ 58.118539] RAX: 0000000000000000 RBX: ffff8801d23f0a80 RCX: ffffffff81707df7 [ 58.119493] RDX: 1ffff1003a3a2262 RSI: 0000000000000000 RDI: 0000000000d00000 [ 58.120481] RBP: ffff8801d2077670 R08: 0000000000000001 R09: 0000000000000000 [ 58.123430] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d1d11310 [ 58.130669] R13: 0000000000000000 R14: 00000000014000c0 R15: ffffffff85976aa0 [ 58.137924] ? relay_open_buf.part.10+0x97/0x9b0 [ 58.142657] __kmalloc+0x25/0x760 [ 58.146075] ? kmem_cache_alloc_trace+0x456/0x750 [ 58.150888] ? relay_open_buf.part.10+0xc8/0x9b0 [ 58.155617] relay_open_buf.part.10+0xc8/0x9b0 [ 58.160186] ? find_next_bit+0x27/0x30 [ 58.164051] relay_open+0x57a/0xa40 [ 58.167668] ? relay_open_buf.part.10+0x9b0/0x9b0 [ 58.172495] ? __debugfs_create_file+0x2cc/0x3e0 [ 58.177224] ? debugfs_create_file+0x57/0x70 [ 58.181604] do_blk_trace_setup+0x4a4/0xcf0 [ 58.185897] ? blk_tracer_print_line+0x40/0x40 [ 58.190454] ? __might_sleep+0x95/0x190 [ 58.194408] ? kasan_check_write+0x14/0x20 [ 58.198614] ? _copy_from_user+0x99/0x110 [ 58.202731] blk_trace_setup+0xbd/0x180 [ 58.206675] ? do_blk_trace_setup+0xcf0/0xcf0 [ 58.211147] ? disk_name+0x98/0x100 [ 58.214751] ? __handle_mm_fault+0x587/0x39c0 [ 58.219222] blk_trace_ioctl+0x1ab/0x2d0 [ 58.223253] ? blk_add_trace_rq_remap+0x600/0x600 [ 58.228070] ? avc_has_extended_perms+0x7fa/0x12c0 [ 58.232972] blkdev_ioctl+0x8e6/0x1de0 [ 58.236830] ? blkpg_ioctl+0xb20/0xb20 [ 58.240693] ? avc_ss_reset+0x110/0x110 [ 58.244636] ? find_held_lock+0x35/0x1d0 [ 58.248675] ? __do_page_fault+0x64c/0xd60 [ 58.252878] ? lock_downgrade+0x990/0x990 [ 58.257008] ? handle_mm_fault+0x410/0x8d0 [ 58.261226] ? trace_event_raw_event_sched_switch+0x8a0/0x8a0 [ 58.267093] ? up_read+0x1a/0x40 [ 58.270438] ? rcu_note_context_switch+0x710/0x710 [ 58.275341] block_ioctl+0xde/0x120 [ 58.278938] ? blkdev_fallocate+0x3b0/0x3b0 [ 58.283229] do_vfs_ioctl+0x1b1/0x1520 [ 58.287085] ? _cond_resched+0x14/0x30 [ 58.290945] ? ioctl_preallocate+0x2b0/0x2b0 [ 58.295338] ? selinux_capable+0x40/0x40 [ 58.299371] ? putname+0xf3/0x130 [ 58.302799] ? do_sys_open+0x320/0x6d0 [ 58.306665] ? security_file_ioctl+0x89/0xb0 [ 58.311044] SyS_ioctl+0x8f/0xc0 [ 58.314385] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 58.319111] RIP: 0033:0x443e49 [ 58.322271] RSP: 002b:00007ffe7783d698 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 58.329947] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e49 [ 58.337187] RDX: 0000000020ed6000 RSI: 00000000c0481273 RDI: 0000000000000003 [ 58.344426] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 58.351662] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401b30 [ 58.358899] R13: 0000000000401bc0 R14: 0000000000000000 R15: 0000000000000000 [ 58.366350] Dumping ftrace buffer: [ 58.369934] (ftrace buffer empty) [ 58.373614] Kernel Offset: disabled [ 58.377215] Rebooting in 86400 seconds..