[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 33.638429] audit: type=1800 audit(1544658559.816:33): pid=5987 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 33.659568] audit: type=1800 audit(1544658559.816:34): pid=5987 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.897363] audit: type=1400 audit(1544658563.076:35): avc: denied { map } for pid=6164 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 '10.128.0.60' (ECDSA) to the list of known hosts. [ 97.062717] audit: type=1400 audit(1544658623.236:36): avc: denied { map } for pid=6178 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/12/12 23:50:23 parsed 1 programs [ 97.640404] audit: type=1400 audit(1544658623.816:37): avc: denied { map } for pid=6178 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=699 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 99.084416] collect2 (6187) used greatest stack depth: 15296 bytes left 2018/12/12 23:50:25 executed programs: 0 [ 99.559394] IPVS: ftp: loaded support on port[0] = 21 [ 99.564700] IPVS: ftp: loaded support on port[0] = 21 [ 99.566722] IPVS: ftp: loaded support on port[0] = 21 [ 99.572966] IPVS: ftp: loaded support on port[0] = 21 [ 99.583001] IPVS: ftp: loaded support on port[0] = 21 [ 99.583387] IPVS: ftp: loaded support on port[0] = 21 [ 100.336644] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.343350] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.360746] device bridge_slave_0 entered promiscuous mode [ 100.376340] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.386745] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.393516] device bridge_slave_0 entered promiscuous mode [ 100.403241] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.411169] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.417988] device bridge_slave_0 entered promiscuous mode [ 100.432205] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.441018] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.448199] device bridge_slave_1 entered promiscuous mode [ 100.454922] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.461586] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.468428] device bridge_slave_0 entered promiscuous mode [ 100.474610] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.481025] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.488004] device bridge_slave_1 entered promiscuous mode [ 100.495422] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.502093] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.509100] device bridge_slave_1 entered promiscuous mode [ 100.519364] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 100.527800] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.534124] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.545085] device bridge_slave_0 entered promiscuous mode [ 100.556221] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 100.564689] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.571506] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.578561] device bridge_slave_1 entered promiscuous mode [ 100.585778] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 100.594041] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 100.603949] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.614589] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.622342] device bridge_slave_1 entered promiscuous mode [ 100.630062] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 100.639777] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.646143] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.657231] device bridge_slave_0 entered promiscuous mode [ 100.667929] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 100.677605] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 100.684787] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.701506] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.708770] device bridge_slave_1 entered promiscuous mode [ 100.719014] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 100.740100] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 100.765522] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 100.782569] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 100.798562] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 100.816519] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 100.830960] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 100.846481] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 100.864593] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 100.884058] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 100.895690] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 100.933888] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 100.950062] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 100.977847] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 100.993737] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 101.008814] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 101.066285] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 101.103775] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 101.116293] team0: Port device team_slave_0 added [ 101.134699] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 101.145796] team0: Port device team_slave_0 added [ 101.152040] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 101.166105] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 101.178183] team0: Port device team_slave_1 added [ 101.183198] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 101.195352] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 101.202840] team0: Port device team_slave_1 added [ 101.217674] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 101.224989] team0: Port device team_slave_0 added [ 101.232931] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 101.240130] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 101.249216] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 101.258201] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 101.270491] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 101.279891] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 101.295729] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 101.305257] team0: Port device team_slave_0 added [ 101.318083] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 101.325789] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 101.335574] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 101.344343] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 101.358954] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 101.366012] team0: Port device team_slave_1 added [ 101.376718] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 101.384218] team0: Port device team_slave_0 added [ 101.392586] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 101.401657] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 101.414755] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 101.423055] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 101.433492] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 101.442883] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 101.453923] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 101.462101] team0: Port device team_slave_0 added [ 101.469991] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 101.478441] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 101.485719] team0: Port device team_slave_1 added [ 101.497328] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 101.505637] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 101.514999] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 101.523805] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 101.532088] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 101.539976] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 101.548709] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 101.555940] team0: Port device team_slave_1 added [ 101.566179] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 101.583624] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 101.593874] team0: Port device team_slave_1 added [ 101.604108] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 101.617515] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 101.633082] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 101.641514] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 101.650082] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 101.660911] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 101.674302] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 101.685744] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 101.694473] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 101.703141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 101.711772] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 101.728123] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 101.737367] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 101.750379] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 101.763005] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 101.777894] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 101.791667] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 101.807437] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 101.815258] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 101.836349] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 101.852460] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 101.874338] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 101.886462] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 101.898181] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 101.908830] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 101.926844] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 101.933950] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 101.949851] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 101.959891] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 101.968146] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 101.987212] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 102.000211] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 102.011588] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 102.039910] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 102.053874] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 102.064897] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 102.505880] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.512417] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.519424] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.525784] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.538420] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 102.568526] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.574877] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.581561] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.587948] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.601823] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 102.628966] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.635340] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.642091] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.648497] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.672209] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 102.696717] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.703088] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.709767] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.716143] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.732256] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 102.742213] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.748694] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.755352] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.761756] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.773119] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 102.864955] bridge0: port 2(bridge_slave_1) entered blocking state [ 102.871366] bridge0: port 2(bridge_slave_1) entered forwarding state [ 102.878030] bridge0: port 1(bridge_slave_0) entered blocking state [ 102.884380] bridge0: port 1(bridge_slave_0) entered forwarding state [ 102.901901] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 103.186873] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 103.198713] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 103.215086] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 103.223387] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 103.231590] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 103.239269] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 105.277093] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.371440] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.405689] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.532419] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.544568] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.571570] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.589921] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.633196] 8021q: adding VLAN 0 to HW filter on device bond0 [ 105.652447] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.776304] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 105.794781] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 105.810787] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 105.828732] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.848146] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.881088] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 105.891575] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 105.901050] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 105.929389] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 105.938912] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 105.950012] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 105.960259] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 106.087694] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 106.099507] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 106.106536] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 106.122301] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 106.132652] 8021q: adding VLAN 0 to HW filter on device team0 [ 106.142746] 8021q: adding VLAN 0 to HW filter on device team0 [ 106.152800] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 106.163176] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 106.224935] 8021q: adding VLAN 0 to HW filter on device team0 [ 106.236160] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 106.256759] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 106.265437] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 106.364797] 8021q: adding VLAN 0 to HW filter on device team0 [ 106.462969] 8021q: adding VLAN 0 to HW filter on device team0 [ 106.519191] 8021q: adding VLAN 0 to HW filter on device team0 [ 107.474921] audit: type=1400 audit(1544658633.646:38): avc: denied { associate } for pid=6197 comm="syz-executor3" name="syz3" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 2018/12/12 23:50:33 executed programs: 6 2018/12/12 23:50:38 executed programs: 261 2018/12/12 23:50:43 executed programs: 531 2018/12/12 23:50:48 executed programs: 786 2018/12/12 23:50:53 executed programs: 1051 2018/12/12 23:50:58 executed programs: 1321 2018/12/12 23:51:03 executed programs: 1585 2018/12/12 23:51:08 executed programs: 1832 [ 145.488544] ================================================================== [ 145.496108] BUG: KASAN: use-after-free in link_path_walk.part.40+0x12e6/0x1530 [ 145.503471] Read of size 1 at addr ffff8881c2948b02 by task syz-executor2/15759 [ 145.510918] [ 145.512545] CPU: 0 PID: 15759 Comm: syz-executor2 Not tainted 4.20.0-rc6+ #151 [ 145.519900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 145.529260] Call Trace: [ 145.531865] dump_stack+0x244/0x39d [ 145.535524] ? dump_stack_print_info.cold.1+0x20/0x20 [ 145.540718] ? printk+0xa7/0xcf [ 145.544000] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 145.548764] print_address_description.cold.7+0x9/0x1ff [ 145.554133] kasan_report.cold.8+0x242/0x309 [ 145.558531] ? link_path_walk.part.40+0x12e6/0x1530 [ 145.563528] __asan_report_load1_noabort+0x14/0x20 [ 145.568466] link_path_walk.part.40+0x12e6/0x1530 [ 145.573327] ? pick_link+0xaf0/0xaf0 [ 145.577025] ? walk_component+0x2590/0x2590 [ 145.581361] ? selinux_inode_free_security+0x460/0x460 [ 145.586631] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 145.591631] ? atime_needs_update+0x507/0x710 [ 145.596160] ? new_inode+0x40/0x40 [ 145.599716] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 145.605256] ? security_inode_follow_link+0xe8/0x120 [ 145.610338] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 145.615855] ? trailing_symlink+0x2ac/0x970 [ 145.620162] path_lookupat.isra.43+0xf7/0xc00 [ 145.624673] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 145.629848] ? path_parentat.isra.41+0x160/0x160 [ 145.634589] ? usercopy_warn+0x110/0x110 [ 145.638633] ? check_preemption_disabled+0x48/0x280 [ 145.643645] filename_lookup+0x26a/0x520 [ 145.647707] ? filename_parentat.isra.56+0x570/0x570 [ 145.652805] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 145.658355] ? kmem_cache_alloc+0x33a/0x730 [ 145.662686] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 145.668244] ? getname_flags+0x26e/0x590 [ 145.672312] user_path_at_empty+0x40/0x50 [ 145.676480] do_mount+0x177/0x31f0 [ 145.680004] ? lock_downgrade+0x900/0x900 [ 145.684133] ? copy_mount_string+0x40/0x40 [ 145.688349] ? usercopy_warn+0x110/0x110 [ 145.692399] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 145.697918] ? _copy_from_user+0xdf/0x150 [ 145.702057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 145.707573] ? copy_mount_options+0x315/0x430 [ 145.712049] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 145.717630] ksys_mount+0x12d/0x140 [ 145.721264] __x64_sys_mount+0xbe/0x150 [ 145.725236] do_syscall_64+0x1b9/0x820 [ 145.729104] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 145.734444] ? syscall_return_slowpath+0x5e0/0x5e0 [ 145.739355] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 145.744176] ? trace_hardirqs_on_caller+0x310/0x310 [ 145.749211] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 145.754259] ? prepare_exit_to_usermode+0x291/0x3b0 [ 145.759270] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 145.764093] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 145.769270] RIP: 0033:0x457679 [ 145.772466] Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 145.791345] RSP: 002b:00007f265e69ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 145.799035] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457679 [ 145.806326] RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000000000000 [ 145.813574] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 145.820818] R10: 0000000000200000 R11: 0000000000000246 R12: 00007f265e69b6d4 [ 145.828065] R13: 00000000004c2e25 R14: 00000000004d5200 R15: 00000000ffffffff [ 145.835332] [ 145.836949] Allocated by task 15760: [ 145.840666] save_stack+0x43/0xd0 [ 145.844120] kasan_kmalloc+0xc7/0xe0 [ 145.847812] __kmalloc_track_caller+0x157/0x760 [ 145.852458] kstrdup+0x39/0x70 [ 145.855634] bpf_symlink+0x26/0x140 [ 145.859255] vfs_symlink+0x37a/0x5d0 [ 145.862966] do_symlinkat+0x242/0x2d0 [ 145.866755] __x64_sys_symlink+0x59/0x80 [ 145.870805] do_syscall_64+0x1b9/0x820 [ 145.874667] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 145.879824] [ 145.881429] Freed by task 15766: [ 145.884770] save_stack+0x43/0xd0 [ 145.888207] __kasan_slab_free+0x102/0x150 [ 145.892436] kasan_slab_free+0xe/0x10 [ 145.896214] kfree+0xcf/0x230 [ 145.899314] bpf_evict_inode+0x11f/0x150 [ 145.903351] evict+0x4b9/0x980 [ 145.906524] iput+0x679/0xa90 [ 145.909630] do_unlinkat+0x733/0xa30 [ 145.913331] __x64_sys_unlink+0x42/0x50 [ 145.917292] do_syscall_64+0x1b9/0x820 [ 145.921158] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 145.926320] [ 145.927924] The buggy address belongs to the object at ffff8881c2948b00 [ 145.927924] which belongs to the cache kmalloc-32 of size 32 [ 145.940384] The buggy address is located 2 bytes inside of [ 145.940384] 32-byte region [ffff8881c2948b00, ffff8881c2948b20) [ 145.951977] The buggy address belongs to the page: [ 145.956885] page:ffffea00070a5200 count:1 mapcount:0 mapping:ffff8881da8001c0 index:0xffff8881c2948fc1 [ 145.966304] flags: 0x2fffc0000000200(slab) [ 145.970522] raw: 02fffc0000000200 ffffea0007614888 ffffea0006d6afc8 ffff8881da8001c0 [ 145.978406] raw: ffff8881c2948fc1 ffff8881c2948000 000000010000003e 0000000000000000 [ 145.986270] page dumped because: kasan: bad access detected [ 145.991950] [ 145.993561] Memory state around the buggy address: [ 145.998468] ffff8881c2948a00: 00 07 fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 146.005811] ffff8881c2948a80: 00 00 00 fc fc fc fc fc fb fb fb fb fc fc fc fc [ 146.013157] >ffff8881c2948b00: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 146.020495] ^ [ 146.023853] ffff8881c2948b80: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc [ 146.031201] ffff8881c2948c00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 146.038538] ================================================================== [ 146.045874] Disabling lock debugging due to kernel taint [ 146.051801] Kernel panic - not syncing: panic_on_warn set ... [ 146.057721] CPU: 1 PID: 15759 Comm: syz-executor2 Tainted: G B 4.20.0-rc6+ #151 [ 146.066464] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 146.075793] Call Trace: [ 146.078356] dump_stack+0x244/0x39d [ 146.081976] ? dump_stack_print_info.cold.1+0x20/0x20 [ 146.087167] panic+0x2ad/0x55c [ 146.090334] ? add_taint.cold.5+0x16/0x16 [ 146.094457] ? preempt_schedule+0x4d/0x60 [ 146.098582] ? ___preempt_schedule+0x16/0x18 [ 146.102987] ? trace_hardirqs_on+0xb4/0x310 [ 146.107289] kasan_end_report+0x47/0x4f [ 146.111255] kasan_report.cold.8+0x76/0x309 [ 146.115601] ? link_path_walk.part.40+0x12e6/0x1530 [ 146.120597] __asan_report_load1_noabort+0x14/0x20 [ 146.125506] link_path_walk.part.40+0x12e6/0x1530 [ 146.130370] ? pick_link+0xaf0/0xaf0 [ 146.134085] ? walk_component+0x2590/0x2590 [ 146.138386] ? selinux_inode_free_security+0x460/0x460 [ 146.143641] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 146.148658] ? atime_needs_update+0x507/0x710 [ 146.153135] ? new_inode+0x40/0x40 [ 146.156665] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 146.162187] ? security_inode_follow_link+0xe8/0x120 [ 146.167299] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 146.172817] ? trailing_symlink+0x2ac/0x970 [ 146.177120] path_lookupat.isra.43+0xf7/0xc00 [ 146.181591] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 146.186761] ? path_parentat.isra.41+0x160/0x160 [ 146.191496] ? usercopy_warn+0x110/0x110 [ 146.195539] ? check_preemption_disabled+0x48/0x280 [ 146.200537] filename_lookup+0x26a/0x520 [ 146.204588] ? filename_parentat.isra.56+0x570/0x570 [ 146.209687] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 146.215206] ? kmem_cache_alloc+0x33a/0x730 [ 146.219506] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 146.225033] ? getname_flags+0x26e/0x590 [ 146.229073] user_path_at_empty+0x40/0x50 [ 146.233211] do_mount+0x177/0x31f0 [ 146.236735] ? lock_downgrade+0x900/0x900 [ 146.240875] ? copy_mount_string+0x40/0x40 [ 146.245088] ? usercopy_warn+0x110/0x110 [ 146.249128] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 146.254651] ? _copy_from_user+0xdf/0x150 [ 146.258779] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 146.264294] ? copy_mount_options+0x315/0x430 [ 146.268764] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 146.274278] ksys_mount+0x12d/0x140 [ 146.277883] __x64_sys_mount+0xbe/0x150 [ 146.281847] do_syscall_64+0x1b9/0x820 [ 146.285715] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 146.291075] ? syscall_return_slowpath+0x5e0/0x5e0 [ 146.296005] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 146.300826] ? trace_hardirqs_on_caller+0x310/0x310 [ 146.305821] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 146.310813] ? prepare_exit_to_usermode+0x291/0x3b0 [ 146.315806] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 146.320625] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 146.325798] RIP: 0033:0x457679 [ 146.328971] Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 146.347848] RSP: 002b:00007f265e69ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 146.355530] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457679 [ 146.362788] RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000000000000 [ 146.370051] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 146.377296] R10: 0000000000200000 R11: 0000000000000246 R12: 00007f265e69b6d4 [ 146.384540] R13: 00000000004c2e25 R14: 00000000004d5200 R15: 00000000ffffffff [ 146.392720] Kernel Offset: disabled [ 146.396352] Rebooting in 86400 seconds..