Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. executing program [ 154.025961][ T33] audit: type=1400 audit(1595228945.085:8): avc: denied { execmem } for pid=8448 comm="syz-executor909" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 154.033042][ T8448] ===================================================== [ 154.053534][ T8448] BUG: KMSAN: uninit-value in kmsan_check_memory+0xd/0x10 [ 154.060651][ T8448] CPU: 1 PID: 8448 Comm: syz-executor909 Not tainted 5.8.0-rc5-syzkaller #0 [ 154.069320][ T8448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 154.079377][ T8448] Call Trace: [ 154.082682][ T8448] dump_stack+0x1df/0x240 [ 154.087040][ T8448] kmsan_report+0xf7/0x1e0 [ 154.091481][ T8448] kmsan_internal_check_memory+0x238/0x3d0 [ 154.097297][ T8448] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 154.103481][ T8448] kmsan_check_memory+0xd/0x10 [ 154.108254][ T8448] _copy_to_user+0x100/0x1d0 [ 154.112870][ T8448] video_usercopy+0x248a/0x2c00 [ 154.117799][ T8448] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 154.123889][ T8448] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 154.130063][ T8448] video_ioctl2+0x9f/0xb0 [ 154.134408][ T8448] ? video_usercopy+0x2c00/0x2c00 [ 154.139443][ T8448] v4l2_ioctl+0x23f/0x270 [ 154.143791][ T8448] ? v4l2_poll+0x400/0x400 [ 154.148214][ T8448] do_video_ioctl+0x1399/0x10f20 [ 154.153206][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.158421][ T8448] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 154.164245][ T8448] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 154.170324][ T8448] ? do_vfs_ioctl+0x10c7/0x2f50 [ 154.175184][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.180399][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.185614][ T8448] ? v4l2_poll+0x340/0x400 [ 154.190039][ T8448] v4l2_compat_ioctl32+0x2b7/0x320 [ 154.195177][ T8448] ? v4l2_fill_pixfmt+0x860/0x860 [ 154.200215][ T8448] __se_compat_sys_ioctl+0x57c/0xed0 [ 154.205511][ T8448] ? kmsan_get_metadata+0x4f/0x180 [ 154.210648][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.215872][ T8448] ? compat_ptr_ioctl+0x150/0x150 [ 154.220911][ T8448] __ia32_compat_sys_ioctl+0x4a/0x70 [ 154.226226][ T8448] __do_fast_syscall_32+0x2aa/0x400 [ 154.231449][ T8448] do_fast_syscall_32+0x6b/0xd0 [ 154.236336][ T8448] do_SYSENTER_32+0x73/0x90 [ 154.240855][ T8448] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 154.247195][ T8448] RIP: 0023:0xf7f89549 [ 154.251257][ T8448] Code: Bad RIP value. [ 154.255323][ T8448] RSP: 002b:00000000ffc3365c EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 154.263738][ T8448] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c050560f [ 154.271711][ T8448] RDX: 0000000020000040 RSI: 00000000080ea078 RDI: 00000000ffc336b0 [ 154.279685][ T8448] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 154.287658][ T8448] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 154.295630][ T8448] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 154.303630][ T8448] [ 154.305964][ T8448] Local variable ----vb32.i@video_usercopy created at: [ 154.312819][ T8448] video_usercopy+0x20bd/0x2c00 [ 154.317670][ T8448] video_usercopy+0x20bd/0x2c00 [ 154.322510][ T8448] [ 154.324850][ T8448] Bytes 52-55 of 80 are uninitialized [ 154.330219][ T8448] Memory access of size 80 starts at ffffa9c4c0d9f950 [ 154.336974][ T8448] ===================================================== [ 154.343916][ T8448] Disabling lock debugging due to kernel taint [ 154.350066][ T8448] Kernel panic - not syncing: panic_on_warn set ... [ 154.356749][ T8448] CPU: 1 PID: 8448 Comm: syz-executor909 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 154.366818][ T8448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 154.376875][ T8448] Call Trace: [ 154.380180][ T8448] dump_stack+0x1df/0x240 [ 154.384530][ T8448] panic+0x3d5/0xc3e [ 154.388572][ T8448] kmsan_report+0x1df/0x1e0 [ 154.393101][ T8448] kmsan_internal_check_memory+0x238/0x3d0 [ 154.398922][ T8448] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 154.405112][ T8448] kmsan_check_memory+0xd/0x10 [ 154.409891][ T8448] _copy_to_user+0x100/0x1d0 [ 154.414505][ T8448] video_usercopy+0x248a/0x2c00 [ 154.419428][ T8448] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 154.425534][ T8448] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 154.431703][ T8448] video_ioctl2+0x9f/0xb0 [ 154.436058][ T8448] ? video_usercopy+0x2c00/0x2c00 [ 154.441088][ T8448] v4l2_ioctl+0x23f/0x270 [ 154.445436][ T8448] ? v4l2_poll+0x400/0x400 [ 154.449860][ T8448] do_video_ioctl+0x1399/0x10f20 [ 154.454849][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.460083][ T8448] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 154.465904][ T8448] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 154.471987][ T8448] ? do_vfs_ioctl+0x10c7/0x2f50 [ 154.476847][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.482059][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.487282][ T8448] ? v4l2_poll+0x340/0x400 [ 154.491705][ T8448] v4l2_compat_ioctl32+0x2b7/0x320 [ 154.496837][ T8448] ? v4l2_fill_pixfmt+0x860/0x860 [ 154.501870][ T8448] __se_compat_sys_ioctl+0x57c/0xed0 [ 154.507162][ T8448] ? kmsan_get_metadata+0x4f/0x180 [ 154.512302][ T8448] ? kmsan_get_metadata+0x11d/0x180 [ 154.517514][ T8448] ? compat_ptr_ioctl+0x150/0x150 [ 154.522553][ T8448] __ia32_compat_sys_ioctl+0x4a/0x70 [ 154.527861][ T8448] __do_fast_syscall_32+0x2aa/0x400 [ 154.533088][ T8448] do_fast_syscall_32+0x6b/0xd0 [ 154.537953][ T8448] do_SYSENTER_32+0x73/0x90 [ 154.542473][ T8448] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 154.548804][ T8448] RIP: 0023:0xf7f89549 [ 154.552879][ T8448] Code: Bad RIP value. [ 154.556948][ T8448] RSP: 002b:00000000ffc3365c EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 154.565364][ T8448] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c050560f [ 154.573340][ T8448] RDX: 0000000020000040 RSI: 00000000080ea078 RDI: 00000000ffc336b0 [ 154.581315][ T8448] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 154.589320][ T8448] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 154.597296][ T8448] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 154.606341][ T8448] Kernel Offset: 0x14e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 154.618071][ T8448] Rebooting in 86400 seconds..