[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 12.661279] audit: type=1400 audit(1514029396.872:6): avc: denied { map } for pid=3126 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-net-kasan-gce-6,10.128.0.49' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 18.877215] audit: type=1400 audit(1514029403.088:7): avc: denied { map } for pid=3140 comm="syzkaller724316" path="/root/syzkaller724316740" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.841140] ================================================================== [ 28.848589] BUG: KASAN: use-after-free in crypto_aead_free_instance+0xc0/0xd0 [ 28.855841] Read of size 8 at addr ffff8801c7dac4c0 by task cryptomgr_test/14806 [ 28.863344] [ 28.864947] CPU: 0 PID: 14806 Comm: cryptomgr_test Not tainted 4.15.0-rc4+ #164 [ 28.872366] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.881700] Call Trace: [ 28.884272] dump_stack+0x194/0x257 [ 28.887887] ? arch_local_irq_restore+0x53/0x53 [ 28.892539] ? show_regs_print_info+0x18/0x18 [ 28.897026] ? crypto_aead_free_instance+0xc0/0xd0 [ 28.901954] print_address_description+0x73/0x250 [ 28.906777] ? crypto_aead_free_instance+0xc0/0xd0 [ 28.911696] kasan_report+0x25b/0x340 [ 28.915486] __asan_report_load8_noabort+0x14/0x20 [ 28.920403] crypto_aead_free_instance+0xc0/0xd0 [ 28.925145] ? aead_register_instance+0x1c0/0x1c0 [ 28.929966] crypto_free_instance+0x6d/0x100 [ 28.934357] crypto_destroy_instance+0x3c/0x80 [ 28.938917] ? crypto_free_instance+0x100/0x100 [ 28.943567] crypto_remove_final+0x212/0x370 [ 28.947958] ? do_wait_intr_irq+0x3e0/0x3e0 [ 28.952256] ? crypto_attr_alg2+0x140/0x140 [ 28.956565] ? up_write+0x6b/0x120 [ 28.960090] ? up_read+0x40/0x40 [ 28.963449] ? trace_hardirqs_on+0xd/0x10 [ 28.967596] crypto_alg_tested+0x445/0x6f0 [ 28.971815] ? crypto_unregister_template+0x6e0/0x6e0 [ 28.976986] ? lockdep_init_map+0x9/0x10 [ 28.981036] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 28.986134] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.991137] ? trace_hardirqs_on+0xd/0x10 [ 28.995278] cryptomgr_test+0x17/0x30 [ 28.999066] kthread+0x33c/0x400 [ 29.002422] ? crypto_acomp_scomp_free_ctx+0x100/0x100 [ 29.007683] ? kthread_stop+0x7a0/0x7a0 [ 29.011642] ret_from_fork+0x24/0x30 [ 29.015354] [ 29.016961] Allocated by task 14802: [ 29.020657] save_stack+0x43/0xd0 [ 29.024093] kasan_kmalloc+0xad/0xe0 [ 29.027807] kmem_cache_alloc_trace+0x136/0x750 [ 29.032457] pcrypt_create+0x137/0x6c0 [ 29.036333] cryptomgr_probe+0x74/0x240 [ 29.040293] kthread+0x33c/0x400 [ 29.043645] ret_from_fork+0x24/0x30 [ 29.047337] [ 29.048948] Freed by task 3138: [ 29.052216] save_stack+0x43/0xd0 [ 29.055647] kasan_slab_free+0x71/0xc0 [ 29.059510] kfree+0xd6/0x260 [ 29.062598] skb_free_head+0x74/0xb0 [ 29.066286] skb_release_data+0x58c/0x790 [ 29.070414] skb_release_all+0x4a/0x60 [ 29.074274] consume_skb+0x153/0x490 [ 29.077960] __dev_kfree_skb_any+0x85/0xa0 [ 29.082172] free_old_xmit_skbs.isra.27+0x15a/0x2c0 [ 29.087170] start_xmit+0x1b9/0x1650 [ 29.090862] dev_hard_start_xmit+0x248/0xac0 [ 29.095256] sch_direct_xmit+0x2e0/0x920 [ 29.099300] __qdisc_run+0x571/0x1930 [ 29.103079] __dev_queue_xmit+0x89e/0x2200 [ 29.107295] dev_queue_xmit+0x17/0x20 [ 29.111080] ip_finish_output2+0xec8/0x1460 [ 29.115388] ip_finish_output+0x85e/0xd10 [ 29.119512] ip_output+0x1cc/0x860 [ 29.123034] ip_local_out+0x95/0x160 [ 29.126725] ip_queue_xmit+0x8c0/0x18e0 [ 29.130674] tcp_transmit_skb+0x1b12/0x38b0 [ 29.134971] tcp_write_xmit+0x680/0x5190 [ 29.139015] __tcp_push_pending_frames+0xa0/0x250 [ 29.143837] tcp_push+0x538/0x770 [ 29.147274] tcp_sendmsg_locked+0x2663/0x3b30 [ 29.151750] tcp_sendmsg+0x2f/0x50 [ 29.155274] inet_sendmsg+0x11f/0x5e0 [ 29.159052] sock_sendmsg+0xca/0x110 [ 29.162744] sock_write_iter+0x31a/0x5d0 [ 29.166785] __vfs_write+0x684/0x970 [ 29.170475] vfs_write+0x189/0x510 [ 29.173990] SyS_write+0xef/0x220 [ 29.177424] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 29.182149] [ 29.183759] The buggy address belongs to the object at ffff8801c7dac4c0 [ 29.183759] which belongs to the cache kmalloc-1024 of size 1024 [ 29.196571] The buggy address is located 0 bytes inside of [ 29.196571] 1024-byte region [ffff8801c7dac4c0, ffff8801c7dac8c0) [ 29.208337] The buggy address belongs to the page: [ 29.213251] page:00000000f084d1a7 count:1 mapcount:0 mapping:00000000fcb9d527 index:0x0 compound_mapcount: 0 [ 29.223205] flags: 0x2fffc0000008100(slab|head) [ 29.227859] raw: 02fffc0000008100 ffff8801c7dac040 0000000000000000 0000000100000007 [ 29.235722] raw: ffffea00071f0620 ffffea00071f8120 ffff8801db000ac0 0000000000000000 [ 29.243575] page dumped because: kasan: bad access detected [ 29.249256] [ 29.250864] Memory state around the buggy address: [ 29.255774] ffff8801c7dac380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.263121] ffff8801c7dac400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.270464] >ffff8801c7dac480: fb fb fb fb fb fb fb fb fb fb fb fb 00 00 00 00 [ 29.277793] ^ [ 29.283226] ffff8801c7dac500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.291095] ffff8801c7dac580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.298429] ================================================================== [ 29.305761] Disabling lock debugging due to kernel taint [ 29.311276] Kernel panic - not syncing: panic_on_warn set ... [ 29.311276] [ 29.318624] CPU: 0 PID: 14806 Comm: cryptomgr_test Tainted: G B 4.15.0-rc4+ #164 [ 29.327349] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.336682] Call Trace: [ 29.339261] dump_stack+0x194/0x257 [ 29.342873] ? arch_local_irq_restore+0x53/0x53 [ 29.347527] ? kasan_end_report+0x32/0x50 [ 29.351661] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.356401] ? vsnprintf+0x1ed/0x1900 [ 29.360190] ? aead_register_instance+0x1a0/0x1c0 [ 29.365018] panic+0x1e4/0x41c [ 29.368197] ? refcount_error_report+0x214/0x214 [ 29.372937] ? add_taint+0x1c/0x50 [ 29.376459] ? add_taint+0x1c/0x50 [ 29.379985] ? crypto_aead_free_instance+0xc0/0xd0 [ 29.384899] kasan_end_report+0x50/0x50 [ 29.388854] kasan_report+0x144/0x340 [ 29.392639] __asan_report_load8_noabort+0x14/0x20 [ 29.397549] crypto_aead_free_instance+0xc0/0xd0 [ 29.402283] ? aead_register_instance+0x1c0/0x1c0 [ 29.407107] crypto_free_instance+0x6d/0x100 [ 29.411497] crypto_destroy_instance+0x3c/0x80 [ 29.416060] ? crypto_free_instance+0x100/0x100 [ 29.420712] crypto_remove_final+0x212/0x370 [ 29.425106] ? do_wait_intr_irq+0x3e0/0x3e0 [ 29.429411] ? crypto_attr_alg2+0x140/0x140 [ 29.434116] ? up_write+0x6b/0x120 [ 29.437639] ? up_read+0x40/0x40 [ 29.440988] ? trace_hardirqs_on+0xd/0x10 [ 29.445123] crypto_alg_tested+0x445/0x6f0 [ 29.449346] ? crypto_unregister_template+0x6e0/0x6e0 [ 29.454519] ? lockdep_init_map+0x9/0x10 [ 29.458564] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 29.463649] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.468646] ? trace_hardirqs_on+0xd/0x10 [ 29.472782] cryptomgr_test+0x17/0x30 [ 29.476562] kthread+0x33c/0x400 [ 29.479908] ? crypto_acomp_scomp_free_ctx+0x100/0x100 [ 29.485164] ? kthread_stop+0x7a0/0x7a0 [ 29.489125] ret_from_fork+0x24/0x30 [ 29.493247] Dumping ftrace buffer: [ 29.496760] (ftrace buffer empty) [ 29.500437] Kernel Offset: disabled [ 29.504029] Rebooting in 86400 seconds..