[ 448.467729] vivid-007: kernel_thread() failed [ 449.358606] vivid-005: kernel_thread() failed [ 450.000264] vivid-001: kernel_thread() failed [ 450.924835] vivid-003: kernel_thread() failed [ 455.057988] vivid-005: kernel_thread() failed [ 456.968418] vivid-001: kernel_thread() failed [ 458.369534] vivid-009: kernel_thread() failed [ 458.421204] vivid-005: kernel_thread() failed [ 458.736899] vivid-001: kernel_thread() failed [ 459.838719] vivid-001: kernel_thread() failed [ 460.858981] vivid-009: kernel_thread() failed [ 461.541091] device bridge_slave_1 left promiscuous mode [ 461.546852] bridge0: port 2(bridge_slave_1) entered disabled state [ 461.601162] device bridge_slave_0 left promiscuous mode [ 461.606661] bridge0: port 1(bridge_slave_0) entered disabled state [ 461.722847] device hsr_slave_1 left promiscuous mode [ 461.762072] device hsr_slave_0 left promiscuous mode [ 461.802998] team0 (unregistering): Port device team_slave_1 removed [ 461.811923] team0 (unregistering): Port device team_slave_0 removed [ 461.823249] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 461.881814] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 461.944150] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.0.172' (ECDSA) to the list of known hosts. [ 466.418680] device bridge_slave_1 left promiscuous mode [ 466.424238] bridge0: port 2(bridge_slave_1) entered disabled state [ 466.481484] device bridge_slave_0 left promiscuous mode [ 466.486998] bridge0: port 1(bridge_slave_0) entered disabled state [ 466.529953] device bridge_slave_1 left promiscuous mode [ 466.535443] bridge0: port 2(bridge_slave_1) entered disabled state [ 466.569721] device bridge_slave_0 left promiscuous mode [ 466.575235] bridge0: port 1(bridge_slave_0) entered disabled state [ 466.609373] device bridge_slave_1 left promiscuous mode [ 466.614904] bridge0: port 2(bridge_slave_1) entered disabled state [ 466.641086] device bridge_slave_0 left promiscuous mode [ 466.647146] bridge0: port 1(bridge_slave_0) entered disabled state [ 466.679891] device bridge_slave_1 left promiscuous mode [ 466.685425] bridge0: port 2(bridge_slave_1) entered disabled state [ 466.730320] device bridge_slave_0 left promiscuous mode [ 466.736123] bridge0: port 1(bridge_slave_0) entered disabled state [ 466.779674] device bridge_slave_1 left promiscuous mode [ 466.785162] bridge0: port 2(bridge_slave_1) entered disabled state [ 466.839618] device bridge_slave_0 left promiscuous mode [ 466.845234] bridge0: port 1(bridge_slave_0) entered disabled state [ 467.054122] device hsr_slave_1 left promiscuous mode [ 467.080603] device hsr_slave_0 left promiscuous mode [ 467.121427] team0 (unregistering): Port device team_slave_1 removed [ 467.132319] team0 (unregistering): Port device team_slave_0 removed [ 467.142494] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 467.181238] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 467.261470] bond0 (unregistering): Released all slaves [ 467.340324] device hsr_slave_1 left promiscuous mode [ 467.381328] device hsr_slave_0 left promiscuous mode [ 467.416459] team0 (unregistering): Port device team_slave_1 removed [ 467.426581] team0 (unregistering): Port device team_slave_0 removed [ 467.436734] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 467.462341] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 467.524729] bond0 (unregistering): Released all slaves [ 467.599524] device hsr_slave_1 left promiscuous mode [ 467.640803] device hsr_slave_0 left promiscuous mode [ 467.661379] team0 (unregistering): Port device team_slave_1 removed [ 467.672088] team0 (unregistering): Port device team_slave_0 removed [ 467.694531] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 467.741633] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 467.806292] bond0 (unregistering): Released all slaves [ 467.894390] device hsr_slave_1 left promiscuous mode [ 467.931389] device hsr_slave_0 left promiscuous mode [ 467.981312] team0 (unregistering): Port device team_slave_1 removed [ 467.992462] team0 (unregistering): Port device team_slave_0 removed [ 468.002489] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 468.031489] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 468.104410] bond0 (unregistering): Released all slaves [ 468.179535] device hsr_slave_1 left promiscuous mode [ 468.210849] device hsr_slave_0 left promiscuous mode [ 468.251137] team0 (unregistering): Port device team_slave_1 removed [ 468.261011] team0 (unregistering): Port device team_slave_0 removed [ 468.270068] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 468.302404] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 468.363334] bond0 (unregistering): Released all slaves [ 504.248158] ================================================================== [ 504.255734] BUG: KASAN: use-after-free in __vb2_perform_fileio+0x10fd/0x12b0 [ 504.262902] Read of size 4 at addr ffff8880a00d951c by task syz-executor633/5526 [ 504.270409] [ 504.272021] CPU: 0 PID: 5526 Comm: syz-executor633 Not tainted 4.14.182-syzkaller #0 [ 504.279877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 504.289253] Call Trace: [ 504.291848] dump_stack+0xf7/0x13b [ 504.295364] ? __vb2_perform_fileio+0x10fd/0x12b0 [ 504.300197] print_address_description.cold.7+0x9/0x1c9 [ 504.305536] ? __vb2_perform_fileio+0x10fd/0x12b0 [ 504.310350] kasan_report.cold.8+0x11a/0x2d3 [ 504.314729] __asan_report_load4_noabort+0x14/0x20 [ 504.319631] __vb2_perform_fileio+0x10fd/0x12b0 [ 504.324275] ? vb2_core_poll+0x730/0x730 [ 504.328313] ? __lock_is_held+0xb5/0x140 [ 504.332350] vb2_read+0xf/0x20 [ 504.335519] vb2_fop_read+0x1b6/0x390 [ 504.339294] ? vb2_fop_write+0x390/0x390 [ 504.343447] v4l2_read+0x133/0x240 [ 504.346982] __vfs_read+0xdb/0x840 [ 504.350493] ? vfs_copy_file_range+0xb40/0xb40 [ 504.355046] ? fsnotify+0x1160/0x1160 [ 504.358830] ? __inode_security_revalidate+0xd3/0x100 [ 504.363996] ? selinux_file_permission+0x31f/0x3e0 [ 504.368908] ? security_file_permission+0x149/0x1c0 [ 504.373903] ? __do_page_fault+0x479/0xb00 [ 504.378116] ? rw_verify_area+0xb8/0x2b0 [ 504.382167] vfs_read+0xf5/0x300 [ 504.385508] SyS_read+0x100/0x250 [ 504.388938] ? kernel_write+0x130/0x130 [ 504.392897] ? do_syscall_64+0x4c/0x5b0 [ 504.396861] ? kernel_write+0x130/0x130 [ 504.400828] do_syscall_64+0x1c7/0x5b0 [ 504.404796] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 504.409670] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 504.414864] RIP: 0033:0x444f19 [ 504.418041] RSP: 002b:00007fffa2712ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 504.425723] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444f19 [ 504.433317] RDX: 000000000000001e RSI: 0000000020000300 RDI: 0000000000000003 [ 504.440564] RBP: 000000000007b1a5 R08: 0000000000000004 R09: 00000000004002e0 [ 504.447826] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004020b0 [ 504.455770] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 504.463050] [ 504.464739] Allocated by task 5524: [ 504.468373] save_stack_trace+0x16/0x20 [ 504.472363] save_stack+0x43/0xd0 [ 504.475855] kasan_kmalloc+0xc7/0xe0 [ 504.479557] kmem_cache_alloc_trace+0x152/0x7a0 [ 504.484297] __vb2_init_fileio+0x160/0xaf0 [ 504.488510] __vb2_perform_fileio+0xa9f/0x12b0 [ 504.493074] vb2_read+0xf/0x20 [ 504.496244] vb2_fop_read+0x1b6/0x390 [ 504.500020] v4l2_read+0x133/0x240 [ 504.503538] __vfs_read+0xdb/0x840 [ 504.507052] vfs_read+0xf5/0x300 [ 504.510393] SyS_read+0x100/0x250 [ 504.513840] do_syscall_64+0x1c7/0x5b0 [ 504.517707] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 504.522880] [ 504.524503] Freed by task 5524: [ 504.527757] save_stack_trace+0x16/0x20 [ 504.531712] save_stack+0x43/0xd0 [ 504.535165] kasan_slab_free+0x71/0xc0 [ 504.539026] kfree+0xcc/0x270 [ 504.542122] __vb2_cleanup_fileio+0xee/0x140 [ 504.546504] vb2_core_queue_release+0xf/0x70 [ 504.550884] _vb2_fop_release+0x1ac/0x280 [ 504.555004] vb2_fop_release+0x66/0xd0 [ 504.559109] vivid_fop_release+0x15f/0x3a0 [ 504.563344] v4l2_release+0xeb/0x1a0 [ 504.567035] __fput+0x232/0x750 [ 504.570288] ____fput+0x9/0x10 [ 504.573465] task_work_run+0xe5/0x170 [ 504.577271] do_exit+0x94b/0x2c00 [ 504.580787] do_group_exit+0xf4/0x2f0 [ 504.584567] SyS_exit_group+0x18/0x20 [ 504.588342] do_syscall_64+0x1c7/0x5b0 [ 504.592219] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 504.597383] [ 504.598985] The buggy address belongs to the object at ffff8880a00d9200 [ 504.598985] which belongs to the cache kmalloc-1024 of size 1024 [ 504.611789] The buggy address is located 796 bytes inside of [ 504.611789] 1024-byte region [ffff8880a00d9200, ffff8880a00d9600) [ 504.623793] The buggy address belongs to the page: [ 504.628734] page:ffffea0002803600 count:1 mapcount:0 mapping:ffff8880a00d8000 index:0xffff8880a00d8d80 compound_mapcount: 0 [ 504.639983] flags: 0x1fffc0000008100(slab|head) [ 504.644662] raw: 01fffc0000008100 ffff8880a00d8000 ffff8880a00d8d80 0000000100000006 [ 504.652517] raw: ffffea00021d52a0 ffffea00022aa320 ffff8880aa800ac0 0000000000000000 [ 504.660394] page dumped because: kasan: bad access detected [ 504.666102] [ 504.667728] Memory state around the buggy address: [ 504.672630] ffff8880a00d9400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 504.679977] ffff8880a00d9480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 504.687308] >ffff8880a00d9500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 504.694658] ^ [ 504.698785] ffff8880a00d9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 504.706115] ffff8880a00d9600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 504.713463] ================================================================== [ 504.720811] Disabling lock debugging due to kernel taint [ 504.732608] Kernel panic - not syncing: panic_on_warn set ... [ 504.732608] [ 504.740156] CPU: 0 PID: 5526 Comm: syz-executor633 Tainted: G B 4.14.182-syzkaller #0 [ 504.749331] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 504.758679] Call Trace: [ 504.761349] dump_stack+0xf7/0x13b [ 504.764971] ? __vb2_perform_fileio+0x10fd/0x12b0 [ 504.769802] panic+0x1b0/0x358 [ 504.772978] ? add_taint.cold.5+0x11/0x11 [ 504.777202] ? ___preempt_schedule+0x16/0x18 [ 504.781595] ? __vb2_perform_fileio+0x10fd/0x12b0 [ 504.786474] kasan_end_report+0x47/0x4f [ 504.790478] kasan_report.cold.8+0x76/0x2d3 [ 504.794776] __asan_report_load4_noabort+0x14/0x20 [ 504.799677] __vb2_perform_fileio+0x10fd/0x12b0 [ 504.804333] ? vb2_core_poll+0x730/0x730 [ 504.808399] ? __lock_is_held+0xb5/0x140 [ 504.812465] vb2_read+0xf/0x20 [ 504.815663] vb2_fop_read+0x1b6/0x390 [ 504.819441] ? vb2_fop_write+0x390/0x390 [ 504.823650] v4l2_read+0x133/0x240 [ 504.827184] __vfs_read+0xdb/0x840 [ 504.830704] ? vfs_copy_file_range+0xb40/0xb40 [ 504.835613] ? fsnotify+0x1160/0x1160 [ 504.839416] ? __inode_security_revalidate+0xd3/0x100 [ 504.844595] ? selinux_file_permission+0x31f/0x3e0 [ 504.849521] ? security_file_permission+0x149/0x1c0 [ 504.854515] ? __do_page_fault+0x479/0xb00 [ 504.858764] ? rw_verify_area+0xb8/0x2b0 [ 504.862805] vfs_read+0xf5/0x300 [ 504.866185] SyS_read+0x100/0x250 [ 504.869613] ? kernel_write+0x130/0x130 [ 504.873577] ? do_syscall_64+0x4c/0x5b0 [ 504.877545] ? kernel_write+0x130/0x130 [ 504.881492] do_syscall_64+0x1c7/0x5b0 [ 504.885366] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 504.890185] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 504.895349] RIP: 0033:0x444f19 [ 504.898530] RSP: 002b:00007fffa2712ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 504.906212] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444f19 [ 504.913481] RDX: 000000000000001e RSI: 0000000020000300 RDI: 0000000000000003 [ 504.920744] RBP: 000000000007b1a5 R08: 0000000000000004 R09: 00000000004002e0 [ 504.927998] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004020b0 [ 504.935264] R13: 0000000000402140 R14: 0000000000000000 R15: 0000000000000000 [ 504.944161] Kernel Offset: disabled [ 504.947795] Rebooting in 86400 seconds..