[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 607.697394][ T28] audit: type=1400 audit(1599946217.038:8): avc: denied { execmem } for pid=6848 comm="syz-executor624" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process 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 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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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 643.579238][T10359] ================================================================== [ 643.579416][T10359] BUG: KASAN: unknown-crash in do_exit+0x24a6/0x29f0 [ 643.579427][T10359] Read of size 8 at addr ffffc9000cf30130 by task syz-executor624/10359 [ 643.579430][T10359] [ 643.579443][T10359] CPU: 1 PID: 10359 Comm: syz-executor624 Not tainted 5.9.0-rc4-syzkaller #0 [ 643.579450][T10359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 643.579470][T10359] Call Trace: [ 643.579535][T10359] dump_stack+0x198/0x1fd [ 643.579549][T10359] ? do_exit+0x24a6/0x29f0 [ 643.579559][T10359] ? do_exit+0x24a6/0x29f0 [ 643.579642][T10359] print_address_description.constprop.0.cold+0x5/0x497 [ 643.579655][T10359] ? do_exit+0x24a6/0x29f0 [ 643.579725][T10359] ? lockdep_hardirqs_off+0x96/0xd0 [ 643.579761][T10359] ? vprintk_func+0x97/0x1a6 [ 643.579775][T10359] ? do_exit+0x24a6/0x29f0 [ 643.579784][T10359] ? do_exit+0x24a6/0x29f0 [ 643.579795][T10359] kasan_report.cold+0x1f/0x37 [ 643.579808][T10359] ? do_exit+0x24a6/0x29f0 [ 643.579821][T10359] do_exit+0x24a6/0x29f0 [ 643.579842][T10359] ? mm_update_next_owner+0x7a0/0x7a0 [ 643.579868][T10359] ? get_signal+0x34f/0x1f00 [ 643.579913][T10359] ? lock_downgrade+0x830/0x830 [ 643.579928][T10359] ? lock_is_held_type+0xbb/0xf0 [ 643.579943][T10359] do_group_exit+0x125/0x310 [ 643.579958][T10359] get_signal+0x428/0x1f00 [ 643.579986][T10359] ? put_pid+0x1b/0x30 [ 643.580031][T10359] arch_do_signal+0x82/0x2520 [ 643.580051][T10359] ? copy_siginfo_to_user32+0xa0/0xa0 [ 643.580064][T10359] ? __do_sys_clone+0xc8/0x110 [ 643.580075][T10359] ? _do_fork+0xb10/0xb10 [ 643.580110][T10359] ? exit_to_user_mode_prepare+0xb9/0x200 [ 643.580122][T10359] ? check_preemption_disabled+0x50/0x130 [ 643.580139][T10359] exit_to_user_mode_prepare+0x1ae/0x200 [ 643.580151][T10359] syscall_exit_to_user_mode+0x7e/0x2e0 [ 643.580179][T10359] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 643.580189][T10359] RIP: 0033:0x446b99 [ 643.580194][T10359] Code: Bad RIP value. [ 643.580200][T10359] RSP: 002b:00007f70f5ed9d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 643.580212][T10359] RAX: 0000000000002878 RBX: 00000000006dbc58 RCX: 0000000000446b99 [ 643.580220][T10359] RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000020002004ffc [ 643.580227][T10359] RBP: 00000000006dbc50 R08: ffffffffffffffff R09: 0000000000000000 [ 643.580234][T10359] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c [ 643.580242][T10359] R13: 00007f70f5ed9d20 R14: 00007f70f5ed9d20 R15: 000000000000002d [ 643.580259][T10359] [ 643.580262][T10359] [ 643.580266][T10359] Memory state around the buggy address: [ 643.580276][T10359] ffffc9000cf30000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 643.580285][T10359] ffffc9000cf30080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 643.580293][T10359] >ffffc9000cf30100: 00 00 00 00 00 00 70 07 00 00 77 00 00 00 00 00 [ 643.580298][T10359] ^ [ 643.580306][T10359] ffffc9000cf30180: 00 00 70 07 00 00 70 07 00 00 00 00 77 00 70 07 [ 643.580315][T10359] ffffc9000cf30200: 00 70 07 00 77 00 00 00 00 00 70 07 00 00 00 00 [ 643.580319][T10359] ================================================================== [ 643.580323][T10359] Disabling lock debugging due to kernel taint [ 643.580377][T10359] Kernel panic - not syncing: panic_on_warn set ... [ 643.580387][T10359] CPU: 1 PID: 10359 Comm: syz-executor624 Tainted: G B 5.9.0-rc4-syzkaller #0 [ 643.580392][T10359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 643.580395][T10359] Call Trace: [ 643.580405][T10359] dump_stack+0x198/0x1fd [ 643.580415][T10359] ? do_exit+0x23d0/0x29f0 [ 643.580424][T10359] panic+0x347/0x7c0 [ 643.580434][T10359] ? __warn_printk+0xf3/0xf3 [ 643.580443][T10359] ? do_exit+0x24a6/0x29f0 [ 643.580483][T10359] ? trace_hardirqs_on+0x55/0x220 [ 643.580493][T10359] ? do_exit+0x24a6/0x29f0 [ 643.580501][T10359] ? do_exit+0x24a6/0x29f0 [ 643.580510][T10359] end_report+0x4d/0x53 [ 643.580519][T10359] kasan_report.cold+0xd/0x37 [ 643.580529][T10359] ? do_exit+0x24a6/0x29f0 [ 643.580538][T10359] do_exit+0x24a6/0x29f0 [ 643.580549][T10359] ? mm_update_next_owner+0x7a0/0x7a0 [ 643.580558][T10359] ? get_signal+0x34f/0x1f00 [ 643.580569][T10359] ? lock_downgrade+0x830/0x830 [ 643.580579][T10359] ? lock_is_held_type+0xbb/0xf0 [ 643.580589][T10359] do_group_exit+0x125/0x310 [ 643.580599][T10359] get_signal+0x428/0x1f00 [ 643.580607][T10359] ? put_pid+0x1b/0x30 [ 643.580619][T10359] arch_do_signal+0x82/0x2520 [ 643.580632][T10359] ? copy_siginfo_to_user32+0xa0/0xa0 [ 643.580641][T10359] ? __do_sys_clone+0xc8/0x110 [ 643.580651][T10359] ? _do_fork+0xb10/0xb10 [ 643.580664][T10359] ? exit_to_user_mode_prepare+0xb9/0x200 [ 643.580673][T10359] ? check_preemption_disabled+0x50/0x130 [ 643.580684][T10359] exit_to_user_mode_prepare+0x1ae/0x200 [ 643.580694][T10359] syscall_exit_to_user_mode+0x7e/0x2e0 [ 643.580704][T10359] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 643.580710][T10359] RIP: 0033:0x446b99 [ 643.580713][T10359] Code: Bad RIP value. [ 643.580718][T10359] RSP: 002b:00007f70f5ed9d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 643.580727][T10359] RAX: 0000000000002878 RBX: 00000000006dbc58 RCX: 0000000000446b99 [ 643.580734][T10359] RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000020002004ffc [ 643.580740][T10359] RBP: 00000000006dbc50 R08: ffffffffffffffff R09: 0000000000000000 [ 643.580745][T10359] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c [ 643.580751][T10359] R13: 00007f70f5ed9d20 R14: 00007f70f5ed9d20 R15: 000000000000002d [ 643.582114][T10359] Kernel Offset: disabled