Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts. executing program [ 53.237136] audit: type=1400 audit(1578562314.351:36): avc: denied { map } for pid=8008 comm="syz-executor864" path="/root/syz-executor864159292" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 53.327319] ================================================================== [ 53.327357] BUG: KASAN: null-ptr-deref in insert_char+0x206/0x450 [ 53.327370] Read of size 4294967294 at addr 0000000000000010 by task syz-executor864/8008 [ 53.327373] [ 53.327389] CPU: 1 PID: 8008 Comm: syz-executor864 Not tainted 4.19.93-syzkaller #0 [ 53.327397] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.327402] Call Trace: [ 53.327420] dump_stack+0x197/0x210 [ 53.327440] ? insert_char+0x206/0x450 [ 53.327464] kasan_report.cold+0x199/0x2ba [ 53.327484] check_memory_region+0x123/0x190 [ 53.327499] memmove+0x24/0x50 [ 53.327517] insert_char+0x206/0x450 [ 53.327538] do_con_trol+0x3ca8/0x6070 [ 53.327559] ? reset_palette+0x190/0x190 [ 53.327576] ? kasan_check_read+0x11/0x20 [ 53.327598] ? __atomic_notifier_call_chain+0xfd/0x1a0 [ 53.327622] do_con_write.part.0+0xfd5/0x1eb0 [ 53.327656] ? do_con_trol+0x6070/0x6070 [ 53.327671] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.327686] ? add_wait_queue+0x112/0x170 [ 53.327700] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.327719] ? trace_hardirqs_on+0x67/0x220 [ 53.327741] con_write+0x46/0xd0 [ 53.327758] n_tty_write+0x3f9/0x1140 [ 53.327786] ? process_echoes+0x170/0x170 [ 53.327804] ? do_wait_intr_irq+0x2b0/0x2b0 [ 53.327824] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.327846] ? _copy_from_user+0xdd/0x150 [ 53.327865] tty_write+0x458/0x7a0 [ 53.327885] ? process_echoes+0x170/0x170 [ 53.327904] __vfs_write+0x114/0x810 [ 53.327918] ? tty_read+0x2a0/0x2a0 [ 53.327932] ? kernel_read+0x120/0x120 [ 53.327948] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.327965] ? __inode_security_revalidate+0xda/0x120 [ 53.327980] ? avc_policy_seqno+0xd/0x70 [ 53.327992] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 53.328006] ? selinux_file_permission+0x92/0x550 [ 53.328024] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.328040] ? security_file_permission+0x89/0x230 [ 53.328057] ? rw_verify_area+0x118/0x360 [ 53.328074] vfs_write+0x20c/0x560 [ 53.328093] ksys_write+0x14f/0x2d0 [ 53.328111] ? __ia32_sys_read+0xb0/0xb0 [ 53.328129] ? do_syscall_64+0x26/0x620 [ 53.328142] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.328156] ? do_syscall_64+0x26/0x620 [ 53.328175] __x64_sys_write+0x73/0xb0 [ 53.328192] do_syscall_64+0xfd/0x620 [ 53.328210] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.328221] RIP: 0033:0x4404f9 [ 53.328235] 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.328243] RSP: 002b:00007fff1e748358 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 53.328257] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 53.328266] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 53.328274] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.328282] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 53.328290] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 53.328311] ================================================================== [ 53.328316] Disabling lock debugging due to kernel taint [ 53.329681] Kernel panic - not syncing: panic_on_warn set ... [ 53.329681] [ 53.329698] CPU: 1 PID: 8008 Comm: syz-executor864 Tainted: G B 4.19.93-syzkaller #0 [ 53.329706] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.329710] Call Trace: [ 53.329728] dump_stack+0x197/0x210 [ 53.329744] ? insert_char+0x206/0x450 [ 53.329756] panic+0x26a/0x50e [ 53.329767] ? __warn_printk+0xf3/0xf3 [ 53.329783] ? insert_char+0x206/0x450 [ 53.329798] ? preempt_schedule+0x4b/0x60 [ 53.329812] ? ___preempt_schedule+0x16/0x18 [ 53.329828] ? trace_hardirqs_on+0x5e/0x220 [ 53.329844] ? insert_char+0x206/0x450 [ 53.329859] kasan_end_report+0x47/0x4f [ 53.329873] kasan_report.cold+0xa9/0x2ba [ 53.329888] check_memory_region+0x123/0x190 [ 53.329902] memmove+0x24/0x50 [ 53.329915] insert_char+0x206/0x450 [ 53.329934] do_con_trol+0x3ca8/0x6070 [ 53.329949] ? reset_palette+0x190/0x190 [ 53.329962] ? kasan_check_read+0x11/0x20 [ 53.329980] ? __atomic_notifier_call_chain+0xfd/0x1a0 [ 53.329998] do_con_write.part.0+0xfd5/0x1eb0 [ 53.330021] ? do_con_trol+0x6070/0x6070 [ 53.330033] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.330047] ? add_wait_queue+0x112/0x170 [ 53.330060] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 53.330073] ? trace_hardirqs_on+0x67/0x220 [ 53.330090] con_write+0x46/0xd0 [ 53.330106] n_tty_write+0x3f9/0x1140 [ 53.330128] ? process_echoes+0x170/0x170 [ 53.330143] ? do_wait_intr_irq+0x2b0/0x2b0 [ 53.330157] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.330169] ? _copy_from_user+0xdd/0x150 [ 53.330183] tty_write+0x458/0x7a0 [ 53.330198] ? process_echoes+0x170/0x170 [ 53.330213] __vfs_write+0x114/0x810 [ 53.330225] ? tty_read+0x2a0/0x2a0 [ 53.330237] ? kernel_read+0x120/0x120 [ 53.330250] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 53.330265] ? __inode_security_revalidate+0xda/0x120 [ 53.330279] ? avc_policy_seqno+0xd/0x70 [ 53.330291] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 53.330304] ? selinux_file_permission+0x92/0x550 [ 53.330319] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.330334] ? security_file_permission+0x89/0x230 [ 53.330348] ? rw_verify_area+0x118/0x360 [ 53.330363] vfs_write+0x20c/0x560 [ 53.330379] ksys_write+0x14f/0x2d0 [ 53.330394] ? __ia32_sys_read+0xb0/0xb0 [ 53.330417] ? do_syscall_64+0x26/0x620 [ 53.330430] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.330441] ? do_syscall_64+0x26/0x620 [ 53.330455] __x64_sys_write+0x73/0xb0 [ 53.330470] do_syscall_64+0xfd/0x620 [ 53.330485] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.330495] RIP: 0033:0x4404f9 [ 53.330508] 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.330515] RSP: 002b:00007fff1e748358 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 53.330526] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 53.330534] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 53.330542] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.330549] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 53.330557] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 53.332581] Kernel Offset: disabled [ 53.989277] Rebooting in 86400 seconds..