[....] Starting enhanced syslogd: rsyslogd[ 12.895119] audit: type=1400 audit(1513023257.173:5): avc: denied { syslog } for pid=2993 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.414946] audit: type=1400 audit(1513023278.693:6): avc: denied { map } for pid=3138 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 'ci-upstream-next-kasan-gce-2,10.128.0.31' (ECDSA) to the list of known hosts. executing program [ 40.473129] audit: type=1400 audit(1513023284.751:7): avc: denied { map } for pid=3150 comm="syzkaller936177" path="/root/syzkaller936177457" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 40.477390] ================================================================== [ 40.477407] BUG: KASAN: global-out-of-bounds in show_timer+0x278/0x2b0 [ 40.477412] Read of size 8 at addr ffffffff857430f8 by task syzkaller936177/3150 [ 40.477414] [ 40.477421] CPU: 0 PID: 3150 Comm: syzkaller936177 Not tainted 4.15.0-rc2-next-20171211+ #64 [ 40.477425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.477429] Call Trace: [ 40.477438] dump_stack+0x194/0x257 [ 40.477448] ? arch_local_irq_restore+0x53/0x53 [ 40.477456] ? show_regs_print_info+0x18/0x18 [ 40.477466] ? seq_printf+0xb3/0xe0 [ 40.477473] ? show_timer+0x278/0x2b0 [ 40.477483] print_address_description+0x178/0x250 [ 40.477489] ? show_timer+0x278/0x2b0 [ 40.477496] kasan_report+0x25b/0x340 [ 40.477507] __asan_report_load8_noabort+0x14/0x20 [ 40.477513] show_timer+0x278/0x2b0 [ 40.477517] ? timers_start+0x14c/0x1c0 [ 40.477527] seq_read+0x385/0x13d0 [ 40.477549] ? seq_lseek+0x3c0/0x3c0 [ 40.477555] ? selinux_file_permission+0x82/0x460 [ 40.477567] ? security_file_permission+0x89/0x1f0 [ 40.477577] ? rw_verify_area+0xe5/0x2b0 [ 40.477587] do_iter_read+0x3db/0x5b0 [ 40.477595] ? dup_iter+0x260/0x260 [ 40.477612] vfs_readv+0x121/0x1c0 [ 40.477618] ? may_open_dev+0xe0/0xe0 [ 40.477627] ? compat_rw_copy_check_uvector+0x2e0/0x2e0 [ 40.477638] ? mm_fault_error+0x2c0/0x2c0 [ 40.477652] ? fget_raw+0x20/0x20 [ 40.477660] ? do_page_fault+0xee/0x720 [ 40.477671] ? putname+0xf3/0x130 [ 40.477682] ? do_sys_open+0x320/0x6d0 [ 40.477696] do_preadv+0x11b/0x1a0 [ 40.477701] ? do_preadv+0x11b/0x1a0 [ 40.477712] SyS_preadv+0x30/0x40 [ 40.477722] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 40.477727] RIP: 0033:0x440149 [ 40.477730] RSP: 002b:00007fffcd96c2e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 40.477738] RAX: ffffffffffffffda RBX: 00007fffcd96c2f0 RCX: 0000000000440149 [ 40.477742] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003 [ 40.477745] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f [ 40.477749] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a10 [ 40.477752] R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000 [ 40.477772] [ 40.477774] The buggy address belongs to the variable: [ 40.477780] nstr.44399+0x18/0x40 [ 40.477782] [ 40.477785] Memory state around the buggy address: [ 40.477790] ffffffff85742f80: fa fa fa fa 00 00 00 fa fa fa fa fa 00 06 fa fa [ 40.477794] ffffffff85743000: fa fa fa fa 07 fa fa fa fa fa fa fa 05 fa fa fa [ 40.477798] >ffffffff85743080: fa fa fa fa 07 fa fa fa fa fa fa fa 00 00 00 fa [ 40.477802] ^ [ 40.477806] ffffffff85743100: fa fa fa fa 00 fa fa fa fa fa fa fa 00 00 00 00 [ 40.477810] ffffffff85743180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.477812] ================================================================== [ 40.477814] Disabling lock debugging due to kernel taint [ 40.477817] Kernel panic - not syncing: panic_on_warn set ... [ 40.477817] [ 40.477821] CPU: 0 PID: 3150 Comm: syzkaller936177 Tainted: G B 4.15.0-rc2-next-20171211+ #64 [ 40.477823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.477824] Call Trace: [ 40.477828] dump_stack+0x194/0x257 [ 40.477833] ? arch_local_irq_restore+0x53/0x53 [ 40.477838] ? vprintk_default+0x28/0x30 [ 40.477843] ? vsnprintf+0x1ed/0x1900 [ 40.477847] ? show_timer+0x180/0x2b0 [ 40.477852] panic+0x1e4/0x41c [ 40.477856] ? refcount_error_report+0x214/0x214 [ 40.477862] ? add_taint+0x40/0x50 [ 40.477866] ? add_taint+0x1c/0x50 [ 40.477870] ? show_timer+0x278/0x2b0 [ 40.477874] kasan_end_report+0x50/0x50 [ 40.477878] kasan_report+0x144/0x340 [ 40.477884] __asan_report_load8_noabort+0x14/0x20 [ 40.477887] show_timer+0x278/0x2b0 [ 40.477891] ? timers_start+0x14c/0x1c0 [ 40.477896] seq_read+0x385/0x13d0 [ 40.477907] ? seq_lseek+0x3c0/0x3c0 [ 40.477910] ? selinux_file_permission+0x82/0x460 [ 40.477916] ? security_file_permission+0x89/0x1f0 [ 40.477921] ? rw_verify_area+0xe5/0x2b0 [ 40.477927] do_iter_read+0x3db/0x5b0 [ 40.477930] ? dup_iter+0x260/0x260 [ 40.477939] vfs_readv+0x121/0x1c0 [ 40.477942] ? may_open_dev+0xe0/0xe0 [ 40.477947] ? compat_rw_copy_check_uvector+0x2e0/0x2e0 [ 40.477952] ? mm_fault_error+0x2c0/0x2c0 [ 40.477959] ? fget_raw+0x20/0x20 [ 40.477964] ? do_page_fault+0xee/0x720 [ 40.477970] ? putname+0xf3/0x130 [ 40.477975] ? do_sys_open+0x320/0x6d0 [ 40.477983] do_preadv+0x11b/0x1a0 [ 40.477986] ? do_preadv+0x11b/0x1a0 [ 40.477992] SyS_preadv+0x30/0x40 [ 40.477998] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 40.478003] RIP: 0033:0x440149 [ 40.478005] RSP: 002b:00007fffcd96c2e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 40.478009] RAX: ffffffffffffffda RBX: 00007fffcd96c2f0 RCX: 0000000000440149 [ 40.478011] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003 [ 40.478013] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f [ 40.478015] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a10 [ 40.478017] R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000 [ 40.499015] Dumping ftrace buffer: [ 40.499019] (ftrace buffer empty) [ 40.499021] Kernel Offset: disabled [ 41.002412] Rebooting in 86400 seconds..