[....] Starting enhanced syslogd: rsyslogd[ 12.379248] audit: type=1400 audit(1513203645.339:5): avc: denied { syslog } for pid=2989 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 mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.339427] audit: type=1400 audit(1513203651.299:6): avc: denied { map } for pid=3129 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-mmots-kasan-gce-4,10.128.15.241' (ECDSA) to the list of known hosts. executing program [ 24.655686] audit: type=1400 audit(1513203657.615:7): avc: denied { map } for pid=3143 comm="syzkaller162856" path="/root/syzkaller162856845" 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 [ 24.660787] ================================================================== [ 24.660809] BUG: KASAN: global-out-of-bounds in show_timer+0x278/0x2b0 [ 24.660817] Read of size 8 at addr ffffffff85742fb8 by task syzkaller162856/3143 [ 24.660821] [ 24.660831] CPU: 1 PID: 3143 Comm: syzkaller162856 Not tainted 4.15.0-rc2-mm1+ #39 [ 24.660837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.660842] Call Trace: [ 24.660855] dump_stack+0x194/0x257 [ 24.660870] ? arch_local_irq_restore+0x53/0x53 [ 24.660881] ? show_regs_print_info+0x18/0x18 [ 24.660896] ? seq_printf+0xb3/0xe0 [ 24.660909] ? show_timer+0x278/0x2b0 [ 24.660923] print_address_description+0x178/0x250 [ 24.660933] ? show_timer+0x278/0x2b0 [ 24.660944] kasan_report+0x25b/0x340 [ 24.660961] __asan_report_load8_noabort+0x14/0x20 [ 24.660970] show_timer+0x278/0x2b0 [ 24.660978] ? timers_start+0x14c/0x1c0 [ 24.660994] seq_read+0x385/0x13d0 [ 24.661032] ? seq_lseek+0x3c0/0x3c0 [ 24.661042] ? selinux_file_permission+0x82/0x460 [ 24.661060] ? security_file_permission+0x89/0x1f0 [ 24.661075] ? rw_verify_area+0xe5/0x2b0 [ 24.661092] do_iter_read+0x3db/0x5b0 [ 24.661107] ? dup_iter+0x260/0x260 [ 24.661134] vfs_readv+0x121/0x1c0 [ 24.661142] ? may_open_dev+0xe0/0xe0 [ 24.661157] ? compat_rw_copy_check_uvector+0x2e0/0x2e0 [ 24.661172] ? mm_fault_error+0x2c0/0x2c0 [ 24.661193] ? fget_raw+0x20/0x20 [ 24.661207] ? do_page_fault+0xee/0x720 [ 24.661225] ? putname+0xf3/0x130 [ 24.661241] ? do_sys_open+0x320/0x6d0 [ 24.661264] do_preadv+0x11b/0x1a0 [ 24.661272] ? do_preadv+0x11b/0x1a0 [ 24.661290] SyS_preadv+0x30/0x40 [ 24.661308] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.661316] RIP: 0033:0x440149 [ 24.661322] RSP: 002b:00007ffc3da16208 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 24.661334] RAX: ffffffffffffffda RBX: 00007ffc3da16210 RCX: 0000000000440149 [ 24.661340] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003 [ 24.661347] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f [ 24.661353] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a10 [ 24.661359] R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000 [ 24.661389] [ 24.661394] The buggy address belongs to the variable: [ 24.661403] nstr.44378+0x18/0x40 [ 24.661406] [ 24.661411] Memory state around the buggy address: [ 24.661419] ffffffff85742e80: fa fa fa fa 00 06 fa fa fa fa fa fa 07 fa fa fa [ 24.661426] ffffffff85742f00: fa fa fa fa 05 fa fa fa fa fa fa fa 07 fa fa fa [ 24.661433] >ffffffff85742f80: fa fa fa fa 00 00 00 fa fa fa fa fa 00 fa fa fa [ 24.661439] ^ [ 24.661446] ffffffff85743000: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.661453] ffffffff85743080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.661457] ================================================================== [ 24.661461] Disabling lock debugging due to kernel taint [ 24.661464] Kernel panic - not syncing: panic_on_warn set ... [ 24.661464] [ 24.661470] CPU: 1 PID: 3143 Comm: syzkaller162856 Tainted: G B 4.15.0-rc2-mm1+ #39 [ 24.661473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.661475] Call Trace: [ 24.661481] dump_stack+0x194/0x257 [ 24.661490] ? arch_local_irq_restore+0x53/0x53 [ 24.661498] ? vprintk_default+0x28/0x30 [ 24.661506] ? vsnprintf+0x1ed/0x1900 [ 24.661513] ? show_timer+0x1e0/0x2b0 [ 24.661520] panic+0x1e4/0x41c [ 24.661526] ? refcount_error_report+0x214/0x214 [ 24.661536] ? add_taint+0x40/0x50 [ 24.661542] ? add_taint+0x1c/0x50 [ 24.661550] ? show_timer+0x278/0x2b0 [ 24.661556] kasan_end_report+0x50/0x50 [ 24.661563] kasan_report+0x144/0x340 [ 24.661572] __asan_report_load8_noabort+0x14/0x20 [ 24.661578] show_timer+0x278/0x2b0 [ 24.661584] ? timers_start+0x14c/0x1c0 [ 24.661593] seq_read+0x385/0x13d0 [ 24.661610] ? seq_lseek+0x3c0/0x3c0 [ 24.661615] ? selinux_file_permission+0x82/0x460 [ 24.661625] ? security_file_permission+0x89/0x1f0 [ 24.661634] ? rw_verify_area+0xe5/0x2b0 [ 24.661642] do_iter_read+0x3db/0x5b0 [ 24.661649] ? dup_iter+0x260/0x260 [ 24.661662] vfs_readv+0x121/0x1c0 [ 24.661668] ? may_open_dev+0xe0/0xe0 [ 24.661676] ? compat_rw_copy_check_uvector+0x2e0/0x2e0 [ 24.661684] ? mm_fault_error+0x2c0/0x2c0 [ 24.661695] ? fget_raw+0x20/0x20 [ 24.661703] ? do_page_fault+0xee/0x720 [ 24.661713] ? putname+0xf3/0x130 [ 24.661722] ? do_sys_open+0x320/0x6d0 [ 24.661734] do_preadv+0x11b/0x1a0 [ 24.661739] ? do_preadv+0x11b/0x1a0 [ 24.661749] SyS_preadv+0x30/0x40 [ 24.661758] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.661762] RIP: 0033:0x440149 [ 24.661765] RSP: 002b:00007ffc3da16208 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 24.661771] RAX: ffffffffffffffda RBX: 00007ffc3da16210 RCX: 0000000000440149 [ 24.661775] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003 [ 24.661778] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f [ 24.661782] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401a10 [ 24.661785] R13: 0000000000401aa0 R14: 0000000000000000 R15: 0000000000000000 [ 24.682289] Dumping ftrace buffer: [ 24.682291] (ftrace buffer empty) [ 24.682293] Kernel Offset: disabled [ 25.184982] Rebooting in 86400 seconds..