Warning: Permanently added '10.128.0.98' (ECDSA) to the list of known hosts. syzkaller login: [ 36.453132] IPVS: ftp: loaded support on port[0] = 21 [ 36.522764] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 36.530469] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 36.541327] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 36.557871] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program [ 36.571503] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 36.578117] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 36.585879] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 36.593518] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 executing program executing program executing program executing program executing program executing program [ 44.368020] ================================================================== [ 44.375772] BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x22c/0x240 [ 44.382784] Read of size 8 at addr ffff8880a0c3b400 by task syz-executor453/11921 [ 44.390381] [ 44.391998] CPU: 1 PID: 11921 Comm: syz-executor453 Not tainted 4.19.194-syzkaller #0 [ 44.399946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.409481] Call Trace: [ 44.412062] dump_stack+0x1fc/0x2ef [ 44.415683] print_address_description.cold+0x54/0x219 [ 44.420950] kasan_report_error.cold+0x8a/0x1b9 [ 44.425904] ? vgem_gem_dumb_create+0x22c/0x240 [ 44.430581] __asan_report_load8_noabort+0x88/0x90 [ 44.435519] ? drm_gem_object_put_unlocked+0x70/0x180 [ 44.440695] ? vgem_gem_dumb_create+0x22c/0x240 [ 44.445376] vgem_gem_dumb_create+0x22c/0x240 [ 44.449875] drm_mode_create_dumb+0x27c/0x300 [ 44.454374] drm_ioctl_kernel+0x208/0x2a0 [ 44.458511] ? drm_mode_create_dumb+0x300/0x300 [ 44.463167] ? drm_ioctl_permit+0x210/0x210 [ 44.467501] ? __might_fault+0x192/0x1d0 [ 44.471589] drm_ioctl+0x507/0x9c0 [ 44.475132] ? drm_mode_create_dumb+0x300/0x300 [ 44.479805] ? drm_getstats+0x20/0x20 [ 44.484314] ? lock_downgrade+0x720/0x720 [ 44.488496] ? lock_acquire+0x170/0x3c0 [ 44.492479] ? futex_exit_release+0x220/0x220 [ 44.496964] ? drm_getstats+0x20/0x20 [ 44.500874] do_vfs_ioctl+0xcdb/0x12e0 [ 44.504805] ? lock_downgrade+0x720/0x720 [ 44.508942] ? check_preemption_disabled+0x41/0x280 [ 44.513948] ? ioctl_preallocate+0x200/0x200 [ 44.518376] ? __fget+0x356/0x510 [ 44.521914] ? do_dup2+0x450/0x450 [ 44.525512] ? __se_sys_futex+0x298/0x3b0 [ 44.529647] ? __fdget+0x1a0/0x230 [ 44.533262] ksys_ioctl+0x9b/0xc0 [ 44.536705] __x64_sys_ioctl+0x6f/0xb0 [ 44.540601] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 44.545271] do_syscall_64+0xf9/0x620 [ 44.549063] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.554239] RIP: 0033:0x44b8e9 [ 44.557418] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 44.576418] RSP: 002b:00007fc530fa1308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 44.584136] RAX: ffffffffffffffda RBX: 00000000004cc4e8 RCX: 000000000044b8e9 [ 44.591394] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000003 [ 44.598735] RBP: 00000000004cc4e0 R08: 0000000000000000 R09: 0000000000000000 [ 44.605991] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cc4ec [ 44.613258] R13: 000000000049c290 R14: 6972642f7665642f R15: 0000000000022000 [ 44.620543] [ 44.622172] Allocated by task 11921: [ 44.625886] kmem_cache_alloc_trace+0x12f/0x380 [ 44.630543] __vgem_gem_create+0x44/0xf0 [ 44.634595] vgem_gem_dumb_create+0xcf/0x240 [ 44.639003] drm_mode_create_dumb+0x27c/0x300 [ 44.643508] drm_ioctl_kernel+0x208/0x2a0 [ 44.647652] drm_ioctl+0x507/0x9c0 [ 44.651358] do_vfs_ioctl+0xcdb/0x12e0 [ 44.655247] ksys_ioctl+0x9b/0xc0 [ 44.658685] __x64_sys_ioctl+0x6f/0xb0 [ 44.662560] do_syscall_64+0xf9/0x620 [ 44.666356] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.671527] [ 44.673138] Freed by task 11921: [ 44.676500] kfree+0xcc/0x210 [ 44.679593] drm_gem_object_free+0x91/0x1c0 [ 44.683912] drm_gem_object_put_unlocked+0xd1/0x180 [ 44.688914] vgem_gem_dumb_create+0x10c/0x240 [ 44.693400] drm_mode_create_dumb+0x27c/0x300 [ 44.697891] drm_ioctl_kernel+0x208/0x2a0 [ 44.702028] drm_ioctl+0x507/0x9c0 [ 44.705554] do_vfs_ioctl+0xcdb/0x12e0 [ 44.709438] ksys_ioctl+0x9b/0xc0 [ 44.712923] __x64_sys_ioctl+0x6f/0xb0 [ 44.716812] do_syscall_64+0xf9/0x620 [ 44.720616] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.725884] [ 44.727497] The buggy address belongs to the object at ffff8880a0c3b300 [ 44.727497] which belongs to the cache kmalloc-512 of size 512 [ 44.740235] The buggy address is located 256 bytes inside of [ 44.740235] 512-byte region [ffff8880a0c3b300, ffff8880a0c3b500) [ 44.752194] The buggy address belongs to the page: [ 44.757113] page:ffffea0002830ec0 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 44.765241] flags: 0xfff00000000100(slab) [ 44.769379] raw: 00fff00000000100 ffffea00023deb48 ffffea000287d5c8 ffff88813bff0940 [ 44.777333] raw: 0000000000000000 ffff8880a0c3b080 0000000100000006 0000000000000000 [ 44.785193] page dumped because: kasan: bad access detected [ 44.790895] [ 44.792512] Memory state around the buggy address: [ 44.797516] ffff8880a0c3b300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.804960] ffff8880a0c3b380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.812304] >ffff8880a0c3b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.819679] ^ [ 44.823031] ffff8880a0c3b480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.830655] ffff8880a0c3b500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.838001] ================================================================== [ 44.845530] Disabling lock debugging due to kernel taint [ 44.852796] Kernel panic - not syncing: panic_on_warn set ... [ 44.852796] [ 44.860313] CPU: 1 PID: 11921 Comm: syz-executor453 Tainted: G B 4.19.194-syzkaller #0 [ 44.869794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.879154] Call Trace: [ 44.881757] dump_stack+0x1fc/0x2ef [ 44.885482] panic+0x26a/0x50e [ 44.888702] ? __warn_printk+0xf3/0xf3 [ 44.892609] ? preempt_schedule_common+0x45/0xc0 [ 44.897350] ? ___preempt_schedule+0x16/0x18 [ 44.902125] ? trace_hardirqs_on+0x55/0x210 [ 44.906441] kasan_end_report+0x43/0x49 [ 44.910400] kasan_report_error.cold+0xa7/0x1b9 [ 44.915180] ? vgem_gem_dumb_create+0x22c/0x240 [ 44.919839] __asan_report_load8_noabort+0x88/0x90 [ 44.924766] ? drm_gem_object_put_unlocked+0x70/0x180 [ 44.929939] ? vgem_gem_dumb_create+0x22c/0x240 [ 44.934593] vgem_gem_dumb_create+0x22c/0x240 [ 44.939088] drm_mode_create_dumb+0x27c/0x300 [ 44.943573] drm_ioctl_kernel+0x208/0x2a0 [ 44.947706] ? drm_mode_create_dumb+0x300/0x300 [ 44.952388] ? drm_ioctl_permit+0x210/0x210 [ 44.956705] ? __might_fault+0x192/0x1d0 [ 44.960757] drm_ioctl+0x507/0x9c0 [ 44.964384] ? drm_mode_create_dumb+0x300/0x300 [ 44.969051] ? drm_getstats+0x20/0x20 [ 44.972838] ? lock_downgrade+0x720/0x720 [ 44.976969] ? lock_acquire+0x170/0x3c0 [ 44.980929] ? futex_exit_release+0x220/0x220 [ 44.985903] ? drm_getstats+0x20/0x20 [ 44.989794] do_vfs_ioctl+0xcdb/0x12e0 [ 44.993744] ? lock_downgrade+0x720/0x720 [ 44.997966] ? check_preemption_disabled+0x41/0x280 [ 45.002966] ? ioctl_preallocate+0x200/0x200 [ 45.007542] ? __fget+0x356/0x510 [ 45.011071] ? do_dup2+0x450/0x450 [ 45.014598] ? __se_sys_futex+0x298/0x3b0 [ 45.018850] ? __fdget+0x1a0/0x230 [ 45.022377] ksys_ioctl+0x9b/0xc0 [ 45.025823] __x64_sys_ioctl+0x6f/0xb0 [ 45.029712] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 45.034293] do_syscall_64+0xf9/0x620 [ 45.038097] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.043267] RIP: 0033:0x44b8e9 [ 45.046489] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 45.065390] RSP: 002b:00007fc530fa1308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.073182] RAX: ffffffffffffffda RBX: 00000000004cc4e8 RCX: 000000000044b8e9 [ 45.080621] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000003 [ 45.087898] RBP: 00000000004cc4e0 R08: 0000000000000000 R09: 0000000000000000 [ 45.095219] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cc4ec [ 45.102489] R13: 000000000049c290 R14: 6972642f7665642f R15: 0000000000022000 [ 45.110670] Kernel Offset: disabled [ 45.114466] Rebooting in 86400 seconds..