sshd (11138) used greatest stack depth: 53632 bytes left
==================================================================
BUG: KMSAN: kernel-infoleak in _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32
CPU: 0 PID: 11180 Comm: syz-executor070 Not tainted 5.0.0-rc1+ #7
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+0x173/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:600
 kmsan_internal_check_memory+0x465/0xb10 mm/kmsan/kmsan.c:663
 kmsan_copy_to_user+0xab/0xc0 mm/kmsan/kmsan_hooks.c:601
 _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32
 copy_to_user include/linux/uaccess.h:174 [inline]
 snd_pcm_oss_read2 sound/core/oss/pcm_oss.c:1484 [inline]
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1537 [inline]
 snd_pcm_oss_read+0xd4a/0x1960 sound/core/oss/pcm_oss.c:2758
 __vfs_read+0x1e5/0xbf0 fs/read_write.c:416
 vfs_read+0x359/0x6f0 fs/read_write.c:452
 ksys_read fs/read_write.c:578 [inline]
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read+0x17a/0x370 fs/read_write.c:586
 __x64_sys_read+0x4a/0x70 fs/read_write.c:586
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x449ec9
Code: e8 2c b3 02 00 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 4b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fbb4447edb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00000000006dac48 RCX: 0000000000449ec9
RDX: 0000000000001000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00000000006dac40 R08: 00007fbb4447f700 R09: 0000000000000000
R10: 00007fbb4447f700 R11: 0000000000000246 R12: 00000000006dac4c
R13: 00007ffc0a1f617f R14: 00007fbb4447f9c0 R15: 0000000000000001

Uninit was created at:
No stack

Byte 2052 of 2640 is uninitialized
Memory access of size 2640 starts at ffff8880ba529000
Data copied to user address 0000000020000080
==================================================================