INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-android-49-kasan-gce-5,10.128.0.59' (ECDSA) to the list of known hosts. 2017/08/24 08:21:55 parsed 1 programs 2017/08/24 08:21:55 executed programs: 0 syzkaller login: [ 50.483843] ================================================================== [ 50.484941] BUG: KASAN: use-after-free in bio_copy_user_iov+0xe61/0xea0 at addr ffff8801d78303c0 [ 50.486102] Read of size 8 by task syz-executor0/3648 [ 50.486826] CPU: 1 PID: 3648 Comm: syz-executor0 Not tainted 4.9.44-g34803e7 #33 [ 50.487827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.489046] ffff8801d6f874c0 ffffffff81d929c9 ffff8801da0013c0 ffff8801d78303c0 [ 50.490190] ffff8801d78304c0 ffffed003af06078 ffff8801d78303c0 ffff8801d6f874e8 [ 50.491350] ffffffff8153c5ec ffffed003af06078 ffff8801da0013c0 0000000000000000 [ 50.492479] Call Trace: [ 50.492832] [] dump_stack+0xc1/0x128 [ 50.493541] [] kasan_object_err+0x1c/0x70 [ 50.494304] [] kasan_report.part.1+0x21c/0x500 [ 50.495139] [] ? bio_copy_user_iov+0xe61/0xea0 [ 50.495957] [] __asan_report_load8_noabort+0x29/0x30 [ 50.496854] [] bio_copy_user_iov+0xe61/0xea0 [ 50.497655] [] ? bio_uncopy_user+0x600/0x600 [ 50.498604] [] ? __sbitmap_queue_get+0xfb/0x230 [ 50.499473] [] ? __bt_get+0x199/0x1f0 [ 50.500195] [] blk_rq_map_user_iov+0x237/0x790 [ 50.501014] [] ? blk_rq_append_bio+0x1a0/0x1a0 [ 50.501837] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 50.502791] [] ? kvm_sched_clock_read+0x9/0x20 [ 50.503629] [] ? import_single_range+0x1d4/0x2b0 [ 50.507975] [] blk_rq_map_user+0x111/0x1a0 [ 50.513823] [] ? blk_rq_map_user_iov+0x790/0x790 [ 50.520191] [] ? sg_res_in_use+0x1f/0x130 [ 50.525952] [] ? sg_res_in_use+0xea/0x130 [ 50.531717] [] ? _raw_read_unlock_irqrestore+0x45/0x70 [ 50.538605] [] sg_common_write.isra.24+0xc1a/0x17c0 [ 50.545232] [] ? sg_open+0x15a0/0x15a0 [ 50.550733] [] ? __might_fault+0xe4/0x1d0 [ 50.556495] [] ? check_stack_object+0x68/0x140 [ 50.562687] [] ? __check_object_size+0x174/0x3a9 [ 50.569055] [] sg_write+0x688/0xad0 [ 50.574292] [] ? sg_ioctl+0x29f0/0x29f0 [ 50.579877] [] ? depot_save_stack+0x122/0x4a0 [ 50.585987] [] ? putname+0xee/0x130 [ 50.591227] [] ? save_stack+0xa3/0xd0 [ 50.596641] [] ? do_futex+0x3e8/0x1640 [ 50.602142] [] ? do_sys_open+0x252/0x4c0 [ 50.607816] [] ? SyS_open+0x2d/0x40 [ 50.613056] [] ? entry_SYSCALL_64_fastpath+0x23/0xc6 [ 50.619772] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 50.626748] [] ? depot_save_stack+0x122/0x4a0 [ 50.632855] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 50.639829] [] ? sg_ioctl+0x29f0/0x29f0 [ 50.645415] [] __vfs_write+0x103/0x680 [ 50.650914] [] ? default_llseek+0x290/0x290 [ 50.656851] [] ? __might_sleep+0x95/0x1a0 [ 50.662613] [] ? __inode_security_revalidate+0xd9/0x130 [ 50.669591] [] ? avc_policy_seqno+0x9/0x20 [ 50.675442] [] ? selinux_file_permission+0x82/0x460 [ 50.682071] [] ? security_file_permission+0x89/0x1e0 [ 50.688786] [] ? rw_verify_area+0xe5/0x2b0 [ 50.694633] [] vfs_write+0x170/0x4e0 [ 50.699961] [] SyS_write+0xd9/0x1b0 [ 50.705761] [] ? SyS_read+0x1b0/0x1b0 [ 50.711179] [] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.717723] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 50.724266] Object at ffff8801d78303c0, in cache kmalloc-256 size: 256 [ 50.730891] Allocated: [ 50.733349] PID = 3648 [ 50.735814] save_stack_trace+0x16/0x20 [ 50.739751] save_stack+0x43/0xd0 [ 50.743166] kasan_kmalloc+0xad/0xe0 [ 50.747275] __kmalloc+0x11d/0x310 [ 50.750778] sg_build_indirect.isra.23+0x8b/0x550 [ 50.755582] sg_build_reserve+0x8d/0xb0 [ 50.759519] sg_open+0x946/0x15a0 [ 50.762933] chrdev_open+0x22b/0x4c0 [ 50.766612] do_dentry_open+0x607/0xc60 [ 50.770549] vfs_open+0x105/0x220 [ 50.773966] path_openat+0x64c/0x2a60 [ 50.777728] do_filp_open+0x197/0x290 [ 50.781490] do_sys_open+0x352/0x4c0 [ 50.785165] SyS_open+0x2d/0x40 [ 50.788407] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 50.793124] Freed: [ 50.795234] PID = 3649 [ 50.797694] save_stack_trace+0x16/0x20 [ 50.801631] save_stack+0x43/0xd0 [ 50.805045] kasan_slab_free+0x73/0xc0 [ 50.808893] kfree+0xf0/0x2f0 [ 50.811962] sg_remove_scat.isra.20+0x212/0x2d0 [ 50.816593] sg_ioctl+0x12d0/0x29f0 [ 50.820182] do_vfs_ioctl+0x1aa/0x10c0 [ 50.824031] SyS_ioctl+0x8f/0xc0 [ 50.827361] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 50.832077] Memory state around the buggy address: [ 50.836970] ffff8801d7830280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.844293] ffff8801d7830300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.851616] >ffff8801d7830380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 50.858938] ^ [ 50.864351] ffff8801d7830400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.871674] ffff8801d7830480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.878996] ================================================================== [ 50.886559] ================================================================== [ 50.893888] BUG: KASAN: wild-memory-access on address ffe7087631eb8000 [ 50.900521] Write of size 38 by task syz-executor0/3648 [ 50.905870] CPU: 1 PID: 3648 Comm: syz-executor0 Tainted: G B 4.9.44-g34803e7 #33 [ 50.914581] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.923903] ffff8801d6f87448 ffffffff81d929c9 ffff8801d6f87618 0000000000000026 [ 50.931852] 0000000000000001 ffff8801d6f87840 ffe7087631eb8000 ffff8801d6f874d0 [ 50.939799] ffffffff8153ca9f 0000000000000000 0000000000000001 ffffffff81ddc284 [ 50.947747] Call Trace: [ 50.950304] [] dump_stack+0xc1/0x128 [ 50.955649] [] kasan_report.part.1+0x40f/0x500 [ 50.961871] [] ? copy_page_from_iter+0x1a4/0x5d0 [ 50.968247] [] ? __might_fault+0xe4/0x1d0 [ 50.974010] [] kasan_report+0x20/0x30 [ 50.979423] [] check_memory_region+0x137/0x190 [ 50.985616] [] kasan_check_write+0x14/0x20 [ 50.991462] [] copy_page_from_iter+0x1a4/0x5d0 [ 50.997659] [] bio_copy_user_iov+0xb05/0xea0 [ 51.003680] [] ? bio_uncopy_user+0x600/0x600 [ 51.009704] [] ? __bt_get+0x199/0x1f0 [ 51.015120] [] blk_rq_map_user_iov+0x237/0x790 [ 51.021317] [] ? blk_rq_append_bio+0x1a0/0x1a0 [ 51.027516] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 51.034495] [] ? kvm_sched_clock_read+0x9/0x20 [ 51.040690] [] ? import_single_range+0x1d4/0x2b0 [ 51.047058] [] blk_rq_map_user+0x111/0x1a0 [ 51.052905] [] ? blk_rq_map_user_iov+0x790/0x790 [ 51.059276] [] ? sg_res_in_use+0x1f/0x130 [ 51.065036] [] ? sg_res_in_use+0xea/0x130 [ 51.070799] [] ? _raw_read_unlock_irqrestore+0x45/0x70 [ 51.077689] [] sg_common_write.isra.24+0xc1a/0x17c0 [ 51.084317] [] ? sg_open+0x15a0/0x15a0 [ 51.089821] [] ? __might_fault+0xe4/0x1d0 [ 51.095583] [] ? check_stack_object+0x68/0x140 [ 51.101788] [] ? __check_object_size+0x174/0x3a9 [ 51.108156] [] sg_write+0x688/0xad0 [ 51.113393] [] ? sg_ioctl+0x29f0/0x29f0 [ 51.118984] [] ? depot_save_stack+0x122/0x4a0 [ 51.125094] [] ? putname+0xee/0x130 [ 51.130333] [] ? save_stack+0xa3/0xd0 [ 51.135748] [] ? do_futex+0x3e8/0x1640 [ 51.141248] [] ? do_sys_open+0x252/0x4c0 [ 51.146921] [] ? SyS_open+0x2d/0x40 [ 51.152162] [] ? entry_SYSCALL_64_fastpath+0x23/0xc6 [ 51.158879] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 51.165856] [] ? depot_save_stack+0x122/0x4a0 [ 51.171966] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 51.178942] [] ? sg_ioctl+0x29f0/0x29f0 [ 51.184527] [] __vfs_write+0x103/0x680 [ 51.190027] [] ? default_llseek+0x290/0x290 [ 51.195961] [] ? __might_sleep+0x95/0x1a0 [ 51.201723] [] ? __inode_security_revalidate+0xd9/0x130 [ 51.208696] [] ? avc_policy_seqno+0x9/0x20 [ 51.214544] [] ? selinux_file_permission+0x82/0x460 [ 51.221176] [] ? security_file_permission+0x89/0x1e0 [ 51.227891] [] ? rw_verify_area+0xe5/0x2b0 [ 51.233738] [] vfs_write+0x170/0x4e0 [ 51.239064] [] SyS_write+0xd9/0x1b0 [ 51.244305] [] ? SyS_read+0x1b0/0x1b0 [ 51.249717] [] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.256260] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 51.262798] ================================================================== [ 51.270249] ================================================================== [ 51.277578] BUG: KASAN: wild-memory-access on address ffe7087631eb8000 [ 51.284207] Write of size 38 by task syz-executor0/3648 [ 51.289535] CPU: 1 PID: 3648 Comm: syz-executor0 Tainted: G B 4.9.44-g34803e7 #33 [ 51.298243] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.307561] ffff8801d6f873f8 ffffffff81d929c9 ffe7087631eb8000 0000000000000026 [ 51.315504] 0000000000000001 0000000020006fdb ffe7087631eb8000 ffff8801d6f87480 [ 51.323453] ffffffff8153ca9f 0000000000000000 0000000000000000 ffffffff81dc60d4 [ 51.331399] Call Trace: [ 51.333952] [] dump_stack+0xc1/0x128 [ 51.339280] [] kasan_report.part.1+0x40f/0x500 [ 51.345478] [] ? copy_user_handle_tail+0xb4/0xd0 [ 51.351850] [] ? retint_kernel+0x2d/0x2d [ 51.357535] [] kasan_report+0x20/0x30 [ 51.362948] [] check_memory_region+0x137/0x190 [ 51.369142] [] memset+0x23/0x40 [ 51.374033] [] copy_user_handle_tail+0xb4/0xd0 [ 51.380229] [] copy_page_from_iter+0x1c0/0x5d0 [ 51.386427] [] bio_copy_user_iov+0xb05/0xea0 [ 51.392447] [] ? bio_uncopy_user+0x600/0x600 [ 51.398468] [] ? __bt_get+0x199/0x1f0 [ 51.403883] [] blk_rq_map_user_iov+0x237/0x790 [ 51.410083] [] ? blk_rq_append_bio+0x1a0/0x1a0 [ 51.416280] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 51.423257] [] ? kvm_sched_clock_read+0x9/0x20 [ 51.429453] [] ? import_single_range+0x1d4/0x2b0 [ 51.435824] [] blk_rq_map_user+0x111/0x1a0 [ 51.441671] [] ? blk_rq_map_user_iov+0x790/0x790 [ 51.448042] [] ? sg_res_in_use+0x1f/0x130 [ 51.453803] [] ? sg_res_in_use+0xea/0x130 [ 51.459569] [] ? _raw_read_unlock_irqrestore+0x45/0x70 [ 51.466460] [] sg_common_write.isra.24+0xc1a/0x17c0 [ 51.473088] [] ? sg_open+0x15a0/0x15a0 [ 51.478594] [] ? __might_fault+0xe4/0x1d0