[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.10.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.252131][ T27] audit: type=1400 audit(1600937416.538:8): avc: denied { execmem } for pid=6854 comm="syz-executor329" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 67.325586][ T6854] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [ 67.337320][ T6854] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 67.345728][ T6854] CPU: 1 PID: 6854 Comm: syz-executor329 Not tainted 5.9.0-rc6-syzkaller #0 [ 67.354365][ T6854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.364403][ T6854] RIP: 0010:__lock_acquire+0xd38/0x5780 [ 67.369931][ T6854] Code: 69 0b 41 bf 01 00 00 00 0f 86 8e 00 00 00 89 05 0e 10 69 0b e9 83 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 df 31 00 00 49 81 3e 00 15 9a 8c 0f 84 95 f3 ff [ 67.390409][ T6854] RSP: 0018:ffffc90005327700 EFLAGS: 00010006 [ 67.396446][ T6854] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 67.404388][ T6854] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018 [ 67.412333][ T6854] RBP: ffff88809d60e3c0 R08: 0000000000000001 R09: 0000000000000000 [ 67.420278][ T6854] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 67.428225][ T6854] R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000000 [ 67.436172][ T6854] FS: 000000000160d880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 67.445070][ T6854] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.451640][ T6854] CR2: 000000002100003f CR3: 000000009e24b000 CR4: 00000000001506e0 [ 67.459596][ T6854] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.467552][ T6854] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.475518][ T6854] Call Trace: [ 67.478799][ T6854] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 67.484598][ T6854] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 67.490564][ T6854] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 67.496627][ T6854] ? split_huge_page_to_list+0x502/0x34c0 [ 67.502347][ T6854] lock_acquire+0x1f3/0xaf0 [ 67.506827][ T6854] ? madvise_cold_or_pageout_pte_range+0xb0d/0x2f10 [ 67.513547][ T6854] ? lock_release+0x8f0/0x8f0 [ 67.518200][ T6854] ? can_split_huge_page+0x400/0x400 [ 67.523480][ T6854] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 67.530194][ T6854] ? lock_is_held_type+0xbb/0xf0 [ 67.535129][ T6854] _raw_spin_lock+0x2a/0x40 [ 67.539654][ T6854] ? madvise_cold_or_pageout_pte_range+0xb0d/0x2f10 [ 67.546245][ T6854] madvise_cold_or_pageout_pte_range+0xb0d/0x2f10 [ 67.552754][ T6854] ? do_madvise.part.0+0x1d00/0x1d00 [ 67.558125][ T6854] ? __lock_acquire+0x164a/0x5780 [ 67.563149][ T6854] ? do_madvise.part.0+0x1d00/0x1d00 [ 67.568442][ T6854] __walk_page_range+0xeed/0x22c0 [ 67.573483][ T6854] ? walk_page_test+0x78/0x180 [ 67.578240][ T6854] walk_page_range+0x20d/0x400 [ 67.582996][ T6854] ? __walk_page_range+0x22c0/0x22c0 [ 67.588341][ T6854] madvise_pageout+0x21b/0x390 [ 67.593094][ T6854] ? madvise_free_single_vma+0x550/0x550 [ 67.598705][ T6854] ? down_read+0x10a/0x420 [ 67.603091][ T6854] ? vmacache_find+0x62/0x330 [ 67.607739][ T6854] ? find_vma_prev+0x7d/0x260 [ 67.612429][ T6854] do_madvise.part.0+0x659/0x1d00 [ 67.617430][ T6854] ? randomize_stack_top+0x100/0x100 [ 67.622689][ T6854] ? swapin_walk_pmd_entry+0x7b0/0x7b0 [ 67.628145][ T6854] ? fput_many+0x2f/0x1a0 [ 67.632468][ T6854] ? lock_is_held_type+0xbb/0xf0 [ 67.637385][ T6854] ? syscall_enter_from_user_mode+0x1d/0x60 [ 67.643284][ T6854] __x64_sys_madvise+0xd9/0x110 [ 67.648118][ T6854] do_syscall_64+0x2d/0x70 [ 67.652510][ T6854] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.658373][ T6854] RIP: 0033:0x4440e9 [ 67.662253][ T6854] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 db d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.681828][ T6854] RSP: 002b:00007fffaa5be0a8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c [ 67.690212][ T6854] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004440e9 [ 67.698167][ T6854] RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000000020000000 [ 67.706112][ T6854] RBP: 00000000006ce018 R08: 0000000000000000 R09: 0000000000000000 [ 67.714069][ T6854] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401d50 [ 67.722012][ T6854] R13: 0000000000401de0 R14: 0000000000000000 R15: 0000000000000000 [ 67.729955][ T6854] Modules linked in: [ 67.733830][ T6854] ---[ end trace 06ad33b1be53d83b ]--- [ 67.739263][ T6854] RIP: 0010:__lock_acquire+0xd38/0x5780 [ 67.744786][ T6854] Code: 69 0b 41 bf 01 00 00 00 0f 86 8e 00 00 00 89 05 0e 10 69 0b e9 83 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 df 31 00 00 49 81 3e 00 15 9a 8c 0f 84 95 f3 ff [ 67.764364][ T6854] RSP: 0018:ffffc90005327700 EFLAGS: 00010006 [ 67.770404][ T6854] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 [ 67.778350][ T6854] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018 [ 67.786306][ T6854] RBP: ffff88809d60e3c0 R08: 0000000000000001 R09: 0000000000000000 [ 67.794248][ T6854] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 67.802205][ T6854] R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000000 [ 67.810156][ T6854] FS: 000000000160d880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 67.819093][ T6854] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.825649][ T6854] CR2: 000000002100003f CR3: 000000009e24b000 CR4: 00000000001506e0 [ 67.833595][ T6854] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.841541][ T6854] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.849484][ T6854] Kernel panic - not syncing: Fatal exception [ 67.856613][ T6854] Kernel Offset: disabled [ 67.860933][ T6854] Rebooting in 86400 seconds..