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-kasan-gce-8,10.128.0.12' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 executing program syzkaller login: [ 22.551060] WARNING: kernel stack regs at ffff8801cc947058 in syzkaller866216:3015 has bad 'bp' value ffffffff857301c0 [ 22.551067] unwind stack type:0 next_sp: (null) mask:0x6 graph_idx:0 [ 22.551077] ffff8801db307680: ffff8801db307708 (0xffff8801db307708) [ 22.551089] ffff8801db307688: ffffffff81283c5e (__save_stack_trace+0x6e/0xd0) [ 22.551093] ffff8801db307690: 0000000000000000 ... [ 22.551099] ffff8801db307698: ffff8801cc940000 (0xffff8801cc940000) [ 22.551106] ffff8801db3076a0: ffff8801cc948000 (0xffff8801cc948000) [ 22.551109] ffff8801db3076a8: 0000000000000000 ... [ 22.551115] ffff8801db3076b0: 0000000000000006 (0x6) [ 22.551122] ffff8801db3076b8: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551128] ffff8801db3076c0: 0000010100000000 (0x10100000000) [ 22.551132] ffff8801db3076c8: 0000000000000000 ... [ 22.551138] ffff8801db3076d0: ffff8801db307680 (0xffff8801db307680) [ 22.551146] ffff8801db3076d8: ffffffff813911de (loop2+0x1a4/0x3a6) [ 22.551152] ffff8801db3076e0: ffff8801cc947058 (0xffff8801cc947058) [ 22.551158] ffff8801db3076e8: 0000000001000000 (0x1000000) [ 22.551165] ffff8801db3076f0: ffff8801d8727980 (0xffff8801d8727980) [ 22.551171] ffff8801db3076f8: ffff8801d87279a0 (0xffff8801d87279a0) [ 22.551180] ffff8801db307700: ffffffff820a21e8 (selinux_cred_free+0x48/0x70) [ 22.551184] ffff8801db307708: ffff8801db307718 (0xffff8801db307718) [ 22.551189] ffff8801db307710: ffffffff81283cd6 (save_stack_trace+0x16/0x20) [ 22.551192] ffff8801db307718: ffff8801db307948 (0xffff8801db307948) [ 22.551198] ffff8801db307720: ffffffff81a11893 (save_stack+0x43/0xd0) [ 22.551201] ffff8801db307728: 000000400000000d (0x400000000d) [ 22.551205] ffff8801db307730: ffff8801db307740 (0xffff8801db307740) [ 22.551208] ffff8801db307738: ffffffff00000000 (0xffffffff00000000) [ 22.551212] ffff8801db307740: ffffffff81283cd6 (save_stack_trace+0x16/0x20) [ 22.551217] ffff8801db307748: ffffffff81a11893 (save_stack+0x43/0xd0) [ 22.551221] ffff8801db307750: ffffffff81a121a1 (kasan_slab_free+0x71/0xc0) [ 22.551226] ffff8801db307758: ffffffff81a0fefa (kfree+0xca/0x250) [ 22.551230] ffff8801db307760: ffffffff820a21e8 (selinux_cred_free+0x48/0x70) [ 22.551236] ffff8801db307768: ffffffff8208c3e8 (security_cred_free+0x48/0x80) [ 22.551242] ffff8801db307770: ffffffff81498366 (put_cred_rcu+0x106/0x400) [ 22.551249] ffff8801db307778: ffffffff815cc5ee (rcu_process_callbacks+0xd3e/0x17b0) [ 22.551255] ffff8801db307780: ffffffff84d68c9b (__do_softirq+0x2bb/0xbd0) [ 22.551261] ffff8801db307788: ffffffff814241b3 (irq_exit+0x1d3/0x210) [ 22.551265] ffff8801db307790: ffffffff84d67376 (smp_apic_timer_interrupt+0x76/0xa0) [ 22.551270] ffff8801db307798: ffffffff84d62b1d (apic_timer_interrupt+0x9d/0xb0) [ 22.551273] ffff8801db3077a0: ffffffff813911de (loop2+0x1a4/0x3a6) [ 22.551276] ffff8801db3077a8: 0000000041b58ab3 (0x41b58ab3) [ 22.551282] ffff8801db3077b0: ffffffff85737e68 (K512_4+0x65e8/0x83fe0) [ 22.551287] ffff8801db3077b8: ffffffff8155e260 (lock_downgrade+0x990/0x990) [ 22.551294] ffff8801db3077c0: ffffffff85b3ff00 (rcu_bh_varname+0x60/0x60) [ 22.551298] ffff8801db3077c8: ffff8801db326a00 (0xffff8801db326a00) [ 22.551301] ffff8801db3077d0: 0000000041b58ab3 (0x41b58ab3) [ 22.551305] ffff8801db3077d8: ffffffff85737b10 (K512_4+0x6290/0x83fe0) [ 22.551310] ffff8801db3077e0: ffffffff8154af10 (check_noncircular+0x20/0x20) [ 22.551313] ffff8801db3077e8: ffff8801db307818 (0xffff8801db307818) [ 22.551318] ffff8801db3077f0: ffffffff815ca8d2 (rcu_advance_cbs+0xa2/0xe0) [ 22.551321] ffff8801db3077f8: ffff8801db326a00 (0xffff8801db326a00) [ 22.551326] ffff8801db307800: ffffffff85b3ff00 (rcu_bh_varname+0x60/0x60) [ 22.551329] ffff8801db307808: 1ffff10000000002 (0x1ffff10000000002) [ 22.551333] ffff8801db307810: ffff8801db307928 (0xffff8801db307928) [ 22.551336] ffff8801db307818: ffff8801db307950 (0xffff8801db307950) [ 22.551341] ffff8801db307820: ffffffff815cab5c (__note_gp_changes+0x1cc/0x8d0) [ 22.551343] ffff8801db307828: 0000000000000000 ... [ 22.551346] ffff8801db307830: 0000000000000086 (0x86) [ 22.551349] ffff8801db307838: ffff8801db307888 (0xffff8801db307888) [ 22.551353] ffff8801db307840: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551356] ffff8801db307848: 0000000041b58ab3 (0x41b58ab3) [ 22.551360] ffff8801db307850: ffffffff85737d08 (K512_4+0x6488/0x83fe0) [ 22.551364] ffff8801db307858: ffffffff81556200 (print_usage_bug+0x480/0x480) [ 22.551369] ffff8801db307860: ffffffff85b3ff18 (rcu_sched_state+0x18/0x1720) [ 22.551372] ffff8801db307868: 0000000041b58ab3 (0x41b58ab3) [ 22.551377] ffff8801db307870: ffffffff85738272 (K512_4+0x69f2/0x83fe0) [ 22.551381] ffff8801db307878: ffffffff8156baf0 (do_raw_spin_trylock+0x190/0x190) [ 22.551385] ffff8801db307880: ffff8801db3078c0 (0xffff8801db3078c0) [ 22.551398] ffff8801db307888: ffffffff8154b900 (match_held_lock+0x9f0/0x9f0) [ 22.551401] ffff8801db307890: 0000000000000001 (0x1) [ 22.551404] ffff8801db307898: 0000000000000003 (0x3) [ 22.551408] ffff8801db3078a0: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551411] ffff8801db3078a8: dffffc0000000000 (0xdffffc0000000000) [ 22.551415] ffff8801db3078b0: ffff8801ce948db8 (0xffff8801ce948db8) [ 22.551418] ffff8801db3078b8: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551421] ffff8801db3078c0: ffffed0039d291aa (0xffffed0039d291aa) [ 22.551426] ffff8801db3078c8: ffffffff85b3c720 (rcu_callback_map+0x60/0x60) [ 22.551429] ffff8801db3078d0: 0000000000000002 (0x2) [ 22.551433] ffff8801db3078d8: ffff8801db307928 (0xffff8801db307928) [ 22.551437] ffff8801db3078e0: ffffffff8154bb8c (__lock_is_held+0xbc/0x140) [ 22.551441] ffff8801db3078e8: ffffffff8571d932 (inat_primary_table+0x240552/0x252700) [ 22.551445] ffff8801db3078f0: ffff8801ce948d50 (0xffff8801ce948d50) [ 22.551448] ffff8801db3078f8: ffff8801ce948d58 (0xffff8801ce948d58) [ 22.551451] ffff8801db307900: 0000000000000086 (0x86) [ 22.551454] ffff8801db307908: ffff8801ce948df8 (0xffff8801ce948df8) [ 22.551458] ffff8801db307910: ffff8801d8727980 (0xffff8801d8727980) [ 22.551461] ffff8801db307918: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551464] ffff8801db307920: ffff8801db307970 (0xffff8801db307970) [ 22.551469] ffff8801db307928: ffffffff815585f8 (debug_check_no_locks_freed+0x268/0x3d0) [ 22.551472] ffff8801db307930: 0000000000000286 (0x286) [ 22.551475] ffff8801db307938: ffff8801d8727980 (0xffff8801d8727980) [ 22.551478] ffff8801db307940: ffff8801dac001c0 (0xffff8801dac001c0) [ 22.551482] ffff8801db307948: ffff8801db307970 (0xffff8801db307970) [ 22.551486] ffff8801db307950: ffffffff81a121a1 (kasan_slab_free+0x71/0xc0) [ 22.551490] ffff8801db307958: ffff8801d8727980 (0xffff8801d8727980) [ 22.551493] ffff8801db307960: 0000000000000286 (0x286) [ 22.551496] ffff8801db307968: ffff8801dac001c0 (0xffff8801dac001c0) [ 22.551499] ffff8801db307970: ffff8801db3079a0 (0xffff8801db3079a0) [ 22.551503] ffff8801db307978: ffffffff81a0fefa (kfree+0xca/0x250) [ 22.551507] ffff8801db307980: ffff8801ccd06e00 (0xffff8801ccd06e00) [ 22.551510] ffff8801db307988: ffff8801d8727980 (0xffff8801d8727980) [ 22.551513] ffff8801db307990: ffff8801ccd06e00 (0xffff8801ccd06e00) [ 22.551517] ffff8801db307998: 1ffff1003b660f44 (0x1ffff1003b660f44) [ 22.551520] ffff8801db3079a0: ffff8801db3079c0 (0xffff8801db3079c0) [ 22.551525] ffff8801db3079a8: ffffffff820a21e8 (selinux_cred_free+0x48/0x70) [ 22.551531] ffff8801db3079b0: ffffffff85c8ad70 (selinux_hooks+0xb90/0x1ac0) [ 22.551534] ffff8801db3079b8: dffffc0000000000 (0xdffffc0000000000) [ 22.551538] ffff8801db3079c0: ffff8801db3079e8 (0xffff8801db3079e8) [ 22.551542] ffff8801db3079c8: ffffffff8208c3e8 (security_cred_free+0x48/0x80) [ 22.551546] ffff8801db3079d0: ffff8801ccd06e00 (0xffff8801ccd06e00) [ 22.551549] ffff8801db3079d8: ffff8801ccd06e98 (0xffff8801ccd06e98) [ 22.551552] ffff8801db3079e0: 1ffff1003b660f40 (0x1ffff1003b660f40) [ 22.551556] ffff8801db3079e8: ffff8801db307ac8 (0xffff8801db307ac8) [ 22.551560] ffff8801db3079f0: ffffffff81498366 (put_cred_rcu+0x106/0x400) [ 22.551563] ffff8801db3079f8: dffffc0000000000 (0xdffffc0000000000) [ 22.551566] ffff8801db307a00: 0000000041b58ab3 (0x41b58ab3) [ 22.551571] ffff8801db307a08: ffffffff8571d7d0 (inat_primary_table+0x2403f0/0x252700) [ 22.551575] ffff8801db307a10: ffffffff81498260 (override_creds+0x140/0x140) [ 22.551578] ffff8801db307a18: ffffed0039d291aa (0xffffed0039d291aa) [ 22.551581] ffff8801db307a20: 0000000000000000 ... [ 22.551584] ffff8801db307a28: 0000000000000001 (0x1) [ 22.551587] ffff8801db307a30: 0000000000000003 (0x3) [ 22.551590] ffff8801db307a38: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551593] ffff8801db307a40: dffffc0000000000 (0xdffffc0000000000) [ 22.551597] ffff8801db307a48: ffff8801ce948d58 (0xffff8801ce948d58) [ 22.551600] ffff8801db307a50: ffff8801db307a98 (0xffff8801db307a98) [ 22.551602] ffff8801db307a58: 0000000000000000 ... [ 22.551606] ffff8801db307a60: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551609] ffff8801db307a68: ffffffff00000002 (0xffffffff00000002) [ 22.551612] ffff8801db307a70: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551617] ffff8801db307a78: ffffffff815cc9c6 (rcu_process_callbacks+0x1116/0x17b0) [ 22.551622] ffff8801db307a80: ffffffff85b3ff00 (rcu_bh_varname+0x60/0x60) [ 22.551625] ffff8801db307a88: dffffc0000000000 (0xdffffc0000000000) [ 22.551629] ffff8801db307a90: ffff8801db307d88 (0xffff8801db307d88) [ 22.551632] ffff8801db307a98: ffff8801ccd06e98 (0xffff8801ccd06e98) [ 22.551635] ffff8801db307aa0: ffff8801ccd06e98 (0xffff8801ccd06e98) [ 22.551639] ffff8801db307aa8: ffff8801db307d48 (0xffff8801db307d48) [ 22.551642] ffff8801db307ab0: ffff8801ccd06ea0 (0xffff8801ccd06ea0) [ 22.551645] ffff8801db307ab8: dffffc0000000000 (0xdffffc0000000000) [ 22.551649] ffff8801db307ac0: ffff8801db307d88 (0xffff8801db307d88) [ 22.551652] ffff8801db307ac8: ffff8801db307db0 (0xffff8801db307db0) [ 22.551657] ffff8801db307ad0: ffffffff815cc5ee (rcu_process_callbacks+0xd3e/0x17b0) [ 22.551660] ffff8801db307ad8: ffff8801db326a00 (0xffff8801db326a00) [ 22.551665] ffff8801db307ae0: ffffffff85b3ff00 (rcu_bh_varname+0x60/0x60) [ 22.551671] ffff8801db307ae8: ffffffff85acdfa8 (pv_irq_ops+0x8/0x60) [ 22.551674] ffff8801db307af0: ffff8801db326ab0 (0xffff8801db326ab0) [ 22.551677] ffff8801db307af8: 000000000000000a (0xa) [ 22.551680] ffff8801db307b00: ffffed0039d29098 (0xffffed0039d29098) [ 22.551684] ffff8801db307b08: ffff8801ce9484c0 (0xffff8801ce9484c0) [ 22.551688] ffff8801db307b10: ffffffff81498260 (override_creds+0x140/0x140) [ 22.551691] ffff8801db307b18: 1ffff1003b660f65 (0x1ffff1003b660f65) [ 22.551695] ffff8801db307b20: ffff8801db326a38 (0xffff8801db326a38) [ 22.551698] ffff8801db307b28: 0000000041b58ab3 (0x41b58ab3) [ 22.551702] ffff8801db307b30: ffffffff8573a048 (K512_4+0x87c8/0x83fe0) [ 22.551707] ffff8801db307b38: ffffffff815cb8b0 (note_gp_changes+0x650/0x650) [ 22.551711] ffff8801db307b40: ffffffff81556200 (print_usage_bug+0x480/0x480)