[ 45.821105] audit: type=1800 audit(1547041803.057:30): pid=8193 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 49.984409] kauditd_printk_skb: 4 callbacks suppressed [ 49.984425] audit: type=1400 audit(1547041807.257:35): avc: denied { map } for pid=8371 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 Warning: Permanently added '10.128.0.89' (ECDSA) to the list of known hosts. [ 71.099960] audit: type=1400 audit(1547041828.377:36): avc: denied { map } for pid=8383 comm="syz-executor133" path="/root/syz-executor133592858" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 71.126929] IPVS: ftp: loaded support on port[0] = 21 [ 71.133847] IPVS: ftp: loaded support on port[0] = 21 [ 71.137963] IPVS: ftp: loaded support on port[0] = 21 [ 71.146249] IPVS: ftp: loaded support on port[0] = 21 [ 71.151735] IPVS: ftp: loaded support on port[0] = 21 [ 71.179680] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 77.566893] ================================================================== [ 77.574411] BUG: KASAN: use-after-free in __xfrm_policy_unlink+0x9ec/0xa00 [ 77.581418] Write of size 8 at addr ffff88808daba050 by task syz-executor133/9146 [ 77.589032] [ 77.590668] CPU: 1 PID: 9146 Comm: syz-executor133 Not tainted 5.0.0-rc1+ #16 [ 77.597941] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.607289] Call Trace: [ 77.609872] dump_stack+0x1db/0x2d0 [ 77.613496] ? dump_stack_print_info.cold+0x20/0x20 [ 77.618715] ? lock_downgrade+0x910/0x910 [ 77.622870] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 77.627541] print_address_description.cold+0x7c/0x20d [ 77.632810] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 77.637473] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 77.642202] kasan_report.cold+0x1b/0x40 [ 77.646262] ? __sanitizer_cov_trace_cmp2+0x11/0x20 [ 77.651270] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 77.655937] __asan_report_store8_noabort+0x17/0x20 [ 77.660955] __xfrm_policy_unlink+0x9ec/0xa00 [ 77.665463] ? xfrm_policy_walk_done+0x360/0x360 [ 77.670227] ? xfrm_policy_byid+0x4a0/0x4a0 [ 77.674586] ? refcount_inc_checked+0x2b/0x70 [ 77.679103] ? __xfrm_policy_link+0x220/0x2f0 [ 77.683601] ? xfrm_pol_inexact_addr_use_any_list+0x1f0/0x1f0 [ 77.689601] xfrm_policy_insert+0x223/0x910 [ 77.693935] ? xfrm_policy_inexact_insert+0xda0/0xda0 [ 77.699133] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 77.704337] pfkey_spdadd+0x111a/0x19a0 [ 77.708322] ? pfkey_spddelete+0x1090/0x1090 [ 77.712730] ? pfkey_spddelete+0x1090/0x1090 [ 77.717139] pfkey_process+0x6d2/0x810 [ 77.721040] ? pfkey_send_new_mapping+0x11f0/0x11f0 [ 77.726077] ? copyin+0xb5/0x100 [ 77.729469] pfkey_sendmsg+0x5bb/0xfc0 [ 77.733401] ? pfkey_spdget+0xa50/0xa50 [ 77.737375] ? selinux_socket_sendmsg+0x36/0x40 [ 77.742043] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.747583] ? security_socket_sendmsg+0x93/0xc0 [ 77.752346] ? pfkey_spdget+0xa50/0xa50 [ 77.756327] sock_sendmsg+0xdd/0x130 [ 77.760062] ___sys_sendmsg+0x7ec/0x910 [ 77.764085] ? copy_msghdr_from_user+0x570/0x570 [ 77.768851] ? find_held_lock+0x35/0x120 [ 77.772918] ? __fd_install+0x2a0/0x8c0 [ 77.776898] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.782444] ? lock_downgrade+0x910/0x910 [ 77.786589] ? kasan_check_read+0x11/0x20 [ 77.790742] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.796280] ? __fget_light+0x2db/0x420 [ 77.800261] ? fget_raw+0x20/0x20 [ 77.803738] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.809288] ? __fdget+0x1b/0x20 [ 77.812647] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.818188] ? sockfd_lookup_light+0xc2/0x160 [ 77.822700] __sys_sendmsg+0x112/0x270 [ 77.826633] ? __ia32_sys_shutdown+0x80/0x80 [ 77.831049] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.836416] ? trace_hardirqs_off_caller+0x300/0x300 [ 77.841571] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.846367] __x64_sys_sendmsg+0x78/0xb0 [ 77.850438] do_syscall_64+0x1a3/0x800 [ 77.854334] ? syscall_return_slowpath+0x5f0/0x5f0 [ 77.859261] ? prepare_exit_to_usermode+0x232/0x3b0 [ 77.864276] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 77.869145] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.874338] RIP: 0033:0x441f79 [ 77.877562] Code: e8 6c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 cb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.896576] RSP: 002b:00007ffd4dfd7528 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 77.904289] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441f79 [ 77.911564] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 [ 77.918824] RBP: 0000000000012ea5 R08: 0000000000000000 R09: 0000000000000000 [ 77.926093] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000 [ 77.933355] R13: 0000000000402e60 R14: 00000000006ce440 R15: 0000000000000000 [ 77.940640] [ 77.942300] Allocated by task 9134: [ 77.945937] save_stack+0x45/0xd0 [ 77.949394] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 77.954319] kasan_kmalloc+0x9/0x10 [ 77.957948] kmem_cache_alloc_trace+0x151/0x760 [ 77.962629] xfrm_policy_alloc+0xfb/0x530 [ 77.966772] pfkey_spdadd+0x24d/0x19a0 [ 77.970697] pfkey_process+0x6d2/0x810 [ 77.974592] pfkey_sendmsg+0x5bb/0xfc0 [ 77.978487] sock_sendmsg+0xdd/0x130 [ 77.982230] ___sys_sendmsg+0x7ec/0x910 [ 77.986199] __sys_sendmsg+0x112/0x270 [ 77.990080] __x64_sys_sendmsg+0x78/0xb0 [ 77.994145] do_syscall_64+0x1a3/0x800 [ 77.998044] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.003222] [ 78.004851] Freed by task 0: [ 78.007871] save_stack+0x45/0xd0 [ 78.011338] __kasan_slab_free+0x102/0x150 [ 78.015578] kasan_slab_free+0xe/0x10 [ 78.019376] kfree+0xcf/0x230 [ 78.022481] xfrm_policy_destroy_rcu+0x48/0x60 [ 78.027058] rcu_process_callbacks+0xc4a/0x1680 [ 78.031722] __do_softirq+0x30b/0xb11 [ 78.035522] [ 78.037170] The buggy address belongs to the object at ffff88808daba040 [ 78.037170] which belongs to the cache kmalloc-1k of size 1024 [ 78.049828] The buggy address is located 16 bytes inside of [ 78.049828] 1024-byte region [ffff88808daba040, ffff88808daba440) [ 78.061694] The buggy address belongs to the page: [ 78.066628] page:ffffea000236ae80 count:1 mapcount:0 mapping:ffff88812c3f0ac0 index:0x0 compound_mapcount: 0 [ 78.076587] flags: 0x1fffc0000010200(slab|head) [ 78.081252] raw: 01fffc0000010200 ffffea00023bfb08 ffffea0002361c08 ffff88812c3f0ac0 [ 78.089128] raw: 0000000000000000 ffff88808daba040 0000000100000007 0000000000000000 [ 78.097044] page dumped because: kasan: bad access detected [ 78.102742] [ 78.104363] Memory state around the buggy address: [ 78.109294] ffff88808dab9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 78.116644] ffff88808dab9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 78.124012] >ffff88808daba000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 78.131368] ^ [ 78.137351] ffff88808daba080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.144710] ffff88808daba100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 78.152062] ================================================================== [ 78.159414] Disabling lock debugging due to kernel taint [ 78.164949] Kernel panic - not syncing: panic_on_warn set ... [ 78.170853] CPU: 1 PID: 9146 Comm: syz-executor133 Tainted: G B 5.0.0-rc1+ #16 [ 78.179560] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.188902] Call Trace: [ 78.191496] dump_stack+0x1db/0x2d0 [ 78.195174] ? dump_stack_print_info.cold+0x20/0x20 [ 78.200188] panic+0x2cb/0x65c [ 78.203375] ? add_taint.cold+0x16/0x16 [ 78.207345] ? trace_hardirqs_on+0xb4/0x310 [ 78.211657] ? trace_hardirqs_on+0xb4/0x310 [ 78.215971] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 78.220646] end_report+0x47/0x4f [ 78.224093] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 78.228767] kasan_report.cold+0xe/0x40 [ 78.232755] ? __sanitizer_cov_trace_cmp2+0x11/0x20 [ 78.237775] ? __xfrm_policy_unlink+0x9ec/0xa00 [ 78.242488] __asan_report_store8_noabort+0x17/0x20 [ 78.247509] __xfrm_policy_unlink+0x9ec/0xa00 [ 78.252044] ? xfrm_policy_walk_done+0x360/0x360 [ 78.256890] ? xfrm_policy_byid+0x4a0/0x4a0 [ 78.261216] ? refcount_inc_checked+0x2b/0x70 [ 78.265724] ? __xfrm_policy_link+0x220/0x2f0 [ 78.270226] ? xfrm_pol_inexact_addr_use_any_list+0x1f0/0x1f0 [ 78.276119] xfrm_policy_insert+0x223/0x910 [ 78.280451] ? xfrm_policy_inexact_insert+0xda0/0xda0 [ 78.285632] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 78.290819] pfkey_spdadd+0x111a/0x19a0 [ 78.294803] ? pfkey_spddelete+0x1090/0x1090 [ 78.299216] ? pfkey_spddelete+0x1090/0x1090 [ 78.303631] pfkey_process+0x6d2/0x810 [ 78.307569] ? pfkey_send_new_mapping+0x11f0/0x11f0 [ 78.312582] ? copyin+0xb5/0x100 [ 78.315950] pfkey_sendmsg+0x5bb/0xfc0 [ 78.319835] ? pfkey_spdget+0xa50/0xa50 [ 78.323802] ? selinux_socket_sendmsg+0x36/0x40 [ 78.328462] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.333989] ? security_socket_sendmsg+0x93/0xc0 [ 78.338770] ? pfkey_spdget+0xa50/0xa50 [ 78.342750] sock_sendmsg+0xdd/0x130 [ 78.346459] ___sys_sendmsg+0x7ec/0x910 [ 78.350434] ? copy_msghdr_from_user+0x570/0x570 [ 78.355198] ? find_held_lock+0x35/0x120 [ 78.359253] ? __fd_install+0x2a0/0x8c0 [ 78.363219] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.368778] ? lock_downgrade+0x910/0x910 [ 78.372936] ? kasan_check_read+0x11/0x20 [ 78.377078] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.382613] ? __fget_light+0x2db/0x420 [ 78.386579] ? fget_raw+0x20/0x20 [ 78.390038] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.395569] ? __fdget+0x1b/0x20 [ 78.398931] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 78.404462] ? sockfd_lookup_light+0xc2/0x160 [ 78.408963] __sys_sendmsg+0x112/0x270 [ 78.412876] ? __ia32_sys_shutdown+0x80/0x80 [ 78.417282] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.422638] ? trace_hardirqs_off_caller+0x300/0x300 [ 78.427732] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 78.432480] __x64_sys_sendmsg+0x78/0xb0 [ 78.436539] do_syscall_64+0x1a3/0x800 [ 78.440423] ? syscall_return_slowpath+0x5f0/0x5f0 [ 78.445359] ? prepare_exit_to_usermode+0x232/0x3b0 [ 78.450380] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 78.455219] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.460400] RIP: 0033:0x441f79 [ 78.463593] Code: e8 6c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 cb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 78.482510] RSP: 002b:00007ffd4dfd7528 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 78.490213] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441f79 [ 78.497473] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 [ 78.504733] RBP: 0000000000012ea5 R08: 0000000000000000 R09: 0000000000000000 [ 78.512019] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000 [ 78.519292] R13: 0000000000402e60 R14: 00000000006ce440 R15: 0000000000000000 [ 78.527668] Kernel Offset: disabled [ 78.531296] Rebooting in 86400 seconds..