Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 49.403493][ T7813] ================================================================== [ 49.411808][ T7813] BUG: KASAN: use-after-free in __vb2_perform_fileio+0x1065/0x1140 [ 49.419711][ T7813] Read of size 4 at addr ffff88808f0be31c by task syz-executor341/7813 [ 49.427944][ T7813] [ 49.430296][ T7813] CPU: 0 PID: 7813 Comm: syz-executor341 Not tainted 5.1.0-rc5-next-20190418 #28 [ 49.439383][ T7813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.449503][ T7813] Call Trace: [ 49.452823][ T7813] dump_stack+0x172/0x1f0 [ 49.457171][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 49.462744][ T7813] print_address_description.cold+0x7c/0x20d [ 49.468726][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 49.474307][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 49.479894][ T7813] __kasan_report.cold+0x1b/0x40 [ 49.484863][ T7813] ? __mutex_lock+0x370/0x1310 [ 49.489665][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 49.495225][ T7813] kasan_report+0x12/0x20 [ 49.499602][ T7813] __asan_report_load4_noabort+0x14/0x20 [ 49.505237][ T7813] __vb2_perform_fileio+0x1065/0x1140 [ 49.510750][ T7813] ? aa_path_link+0x460/0x460 [ 49.515457][ T7813] ? find_held_lock+0x35/0x130 [ 49.520348][ T7813] ? vb2_thread_start+0x370/0x370 [ 49.525408][ T7813] vb2_read+0x3b/0x50 [ 49.529422][ T7813] vb2_fop_read+0x212/0x410 [ 49.533977][ T7813] ? vb2_fop_write+0x410/0x410 [ 49.538758][ T7813] v4l2_read+0x1ce/0x230 [ 49.543010][ T7813] __vfs_read+0x8d/0x110 [ 49.547266][ T7813] ? v4l2_write+0x230/0x230 [ 49.551788][ T7813] vfs_read+0x194/0x3e0 [ 49.555954][ T7813] ksys_read+0x14f/0x2d0 [ 49.560219][ T7813] ? kernel_write+0x120/0x120 [ 49.565016][ T7813] ? do_syscall_64+0x26/0x670 [ 49.569807][ T7813] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.576139][ T7813] ? do_syscall_64+0x26/0x670 [ 49.580834][ T7813] __x64_sys_read+0x73/0xb0 [ 49.585350][ T7813] do_syscall_64+0x103/0x670 [ 49.589949][ T7813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.596253][ T7813] RIP: 0033:0x44a5d9 [ 49.600173][ T7813] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 7b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.620027][ T7813] RSP: 002b:00007f30864d9ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 49.628441][ T7813] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 000000000044a5d9 [ 49.636425][ T7813] RDX: 000000000000004b RSI: 0000000020000280 RDI: 0000000000000004 [ 49.644522][ T7813] RBP: 00000000006dbc30 R08: 00007f30864da700 R09: 0000000000000000 [ 49.652493][ T7813] R10: 00007f30864da700 R11: 0000000000000246 R12: 00000000006dbc3c [ 49.660477][ T7813] R13: 00007ffd7767546f R14: 00007f30864da9c0 R15: 0000000000000001 [ 49.668591][ T7813] [ 49.670907][ T7813] Allocated by task 7814: [ 49.675221][ T7813] save_stack+0x45/0xb0 [ 49.679391][ T7813] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 49.685046][ T7813] kasan_kmalloc+0x9/0x10 [ 49.689372][ T7813] kmem_cache_alloc_trace+0x151/0x760 [ 49.694739][ T7813] __vb2_init_fileio+0x1cb/0xbe0 [ 49.699683][ T7813] __vb2_perform_fileio+0xc01/0x1140 [ 49.704977][ T7813] vb2_read+0x3b/0x50 [ 49.708951][ T7813] vb2_fop_read+0x212/0x410 [ 49.713477][ T7813] v4l2_read+0x1ce/0x230 [ 49.717710][ T7813] __vfs_read+0x8d/0x110 [ 49.721948][ T7813] vfs_read+0x194/0x3e0 [ 49.726102][ T7813] ksys_read+0x14f/0x2d0 [ 49.730335][ T7813] __x64_sys_read+0x73/0xb0 [ 49.734844][ T7813] do_syscall_64+0x103/0x670 [ 49.739458][ T7813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.745353][ T7813] [ 49.747688][ T7813] Freed by task 7812: [ 49.751690][ T7813] save_stack+0x45/0xb0 [ 49.755832][ T7813] __kasan_slab_free+0x102/0x150 [ 49.760760][ T7813] kasan_slab_free+0xe/0x10 [ 49.765253][ T7813] kfree+0xcf/0x230 [ 49.769057][ T7813] __vb2_cleanup_fileio+0x100/0x170 [ 49.774369][ T7813] vb2_core_queue_release+0x20/0x80 [ 49.783354][ T7813] _vb2_fop_release+0x1cf/0x2a0 [ 49.788233][ T7813] vb2_fop_release+0x75/0xc0 [ 49.792838][ T7813] vivid_fop_release+0x18e/0x430 [ 49.797910][ T7813] v4l2_release+0x224/0x3a0 [ 49.802867][ T7813] __fput+0x2e5/0x8d0 [ 49.806886][ T7813] ____fput+0x16/0x20 [ 49.811165][ T7813] task_work_run+0x14a/0x1c0 [ 49.816064][ T7813] do_exit+0x90a/0x2fa0 [ 49.820251][ T7813] do_group_exit+0x135/0x370 [ 49.825943][ T7813] get_signal+0x399/0x1d50 [ 49.839614][ T7813] do_signal+0x87/0x1900 [ 49.844055][ T7813] exit_to_usermode_loop+0x244/0x2c0 [ 49.849352][ T7813] do_syscall_64+0x57e/0x670 [ 49.853968][ T7813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.859861][ T7813] [ 49.862218][ T7813] The buggy address belongs to the object at ffff88808f0be000 [ 49.862218][ T7813] which belongs to the cache kmalloc-1k of size 1024 [ 49.876300][ T7813] The buggy address is located 796 bytes inside of [ 49.876300][ T7813] 1024-byte region [ffff88808f0be000, ffff88808f0be400) [ 49.889736][ T7813] The buggy address belongs to the page: [ 49.895626][ T7813] page:ffffea00023c2f80 count:1 mapcount:0 mapping:ffff88812c3deac0 index:0x0 compound_mapcount: 0 [ 49.906290][ T7813] flags: 0x1fffc0000010200(slab|head) [ 49.911668][ T7813] raw: 01fffc0000010200 ffffea0002a28e88 ffffea0002a6b488 ffff88812c3deac0 [ 49.921130][ T7813] raw: 0000000000000000 ffff88808f0be000 0000000100000007 0000000000000000 [ 49.930074][ T7813] page dumped because: kasan: bad access detected [ 49.936519][ T7813] [ 49.938847][ T7813] Memory state around the buggy address: [ 49.944578][ T7813] ffff88808f0be200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.953400][ T7813] ffff88808f0be280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.961650][ T7813] >ffff88808f0be300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.969713][ T7813] ^ [ 49.974590][ T7813] ffff88808f0be380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.982876][ T7813] ffff88808f0be400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.990925][ T7813] ================================================================== executing program [ 49.998994][ T7813] Disabling lock debugging due to kernel taint [ 50.009588][ T7813] Kernel panic - not syncing: panic_on_warn set ... [ 50.016222][ T7813] CPU: 0 PID: 7813 Comm: syz-executor341 Tainted: G B 5.1.0-rc5-next-20190418 #28 [ 50.026803][ T7813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.036974][ T7813] Call Trace: [ 50.040296][ T7813] dump_stack+0x172/0x1f0 [ 50.044646][ T7813] panic+0x2cb/0x72b [ 50.048542][ T7813] ? __warn_printk+0xf3/0xf3 [ 50.053259][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 50.058804][ T7813] ? preempt_schedule+0x4b/0x60 [ 50.063684][ T7813] ? ___preempt_schedule+0x16/0x18 [ 50.068943][ T7813] ? trace_hardirqs_on+0x5e/0x230 [ 50.073972][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 50.080367][ T7813] end_report+0x47/0x4f [ 50.084520][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 50.090059][ T7813] __kasan_report.cold+0xe/0x40 [ 50.095026][ T7813] ? __mutex_lock+0x370/0x1310 [ 50.099890][ T7813] ? __vb2_perform_fileio+0x1065/0x1140 [ 50.105476][ T7813] kasan_report+0x12/0x20 [ 50.109804][ T7813] __asan_report_load4_noabort+0x14/0x20 [ 50.115443][ T7813] __vb2_perform_fileio+0x1065/0x1140 [ 50.120832][ T7813] ? aa_path_link+0x460/0x460 [ 50.125531][ T7813] ? find_held_lock+0x35/0x130 [ 50.130421][ T7813] ? vb2_thread_start+0x370/0x370 [ 50.135504][ T7813] vb2_read+0x3b/0x50 [ 50.139535][ T7813] vb2_fop_read+0x212/0x410 [ 50.144044][ T7813] ? vb2_fop_write+0x410/0x410 [ 50.148822][ T7813] v4l2_read+0x1ce/0x230 [ 50.153060][ T7813] __vfs_read+0x8d/0x110 [ 50.157295][ T7813] ? v4l2_write+0x230/0x230 [ 50.161793][ T7813] vfs_read+0x194/0x3e0 [ 50.165948][ T7813] ksys_read+0x14f/0x2d0 [ 50.170384][ T7813] ? kernel_write+0x120/0x120 [ 50.175092][ T7813] ? do_syscall_64+0x26/0x670 [ 50.179877][ T7813] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.185955][ T7813] ? do_syscall_64+0x26/0x670 [ 50.190678][ T7813] __x64_sys_read+0x73/0xb0 [ 50.196065][ T7813] do_syscall_64+0x103/0x670 [ 50.200758][ T7813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.206659][ T7813] RIP: 0033:0x44a5d9 [ 50.210537][ T7813] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 7b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 50.230214][ T7813] RSP: 002b:00007f30864d9ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 50.238634][ T7813] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 000000000044a5d9 [ 50.246634][ T7813] RDX: 000000000000004b RSI: 0000000020000280 RDI: 0000000000000004 [ 50.254828][ T7813] RBP: 00000000006dbc30 R08: 00007f30864da700 R09: 0000000000000000 [ 50.262911][ T7813] R10: 00007f30864da700 R11: 0000000000000246 R12: 00000000006dbc3c [ 50.270900][ T7813] R13: 00007ffd7767546f R14: 00007f30864da9c0 R15: 0000000000000001 [ 50.279505][ T7813] Kernel Offset: disabled [ 50.283864][ T7813] Rebooting in 86400 seconds..