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BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x81/0x90 mm/kmsan/kmsan_hooks.c:253
CPU: 0 PID: 19947 Comm: syz-executor.4 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
 kmsan_internal_check_memory+0x238/0x3d0 mm/kmsan/kmsan.c:423
 kmsan_copy_to_user+0x81/0x90 mm/kmsan/kmsan_hooks.c:253
 _copy_to_user+0x15a/0x1f0 lib/usercopy.c:33
 copy_to_user include/linux/uaccess.h:174 [inline]
 video_put_user drivers/media/v4l2-core/v4l2-ioctl.c:3165 [inline]
 video_usercopy+0x248c/0x2b50 drivers/media/v4l2-core/v4l2-ioctl.c:3264
 video_ioctl2+0x9f/0xb0 drivers/media/v4l2-core/v4l2-ioctl.c:3274
 v4l2_ioctl+0x23f/0x270 drivers/media/v4l2-core/v4l2-dev.c:360
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:763 [inline]
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl+0x2e9/0x410 fs/ioctl.c:770
 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:770
 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c449
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2c7efd0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2c7efd16d4 RCX: 000000000045c449
RDX: 00000000200000c0 RSI: 00000000c050560f RDI: 0000000000000003
RBP: 000000000076c060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000616 R14: 00000000004c8975 R15: 000000000076c06c

Local variable ----vb32.i@video_usercopy created at:
 video_put_user drivers/media/v4l2-core/v4l2-ioctl.c:3149 [inline]
 video_usercopy+0x20bf/0x2b50 drivers/media/v4l2-core/v4l2-ioctl.c:3264
 video_put_user drivers/media/v4l2-core/v4l2-ioctl.c:3149 [inline]
 video_usercopy+0x20bf/0x2b50 drivers/media/v4l2-core/v4l2-ioctl.c:3264

Bytes 52-55 of 80 are uninitialized
Memory access of size 80 starts at ffffbd2c00d97ce0
Data copied to user address 00000000200000c0
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