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BUG: KMSAN: uninit-value in snd_pcm_hw_rule_add+0x745/0xdd0 sound/core/pcm_lib.c:1146
CPU: 0 PID: 19153 Comm: syz-executor0 Not tainted 4.20.0-rc7+ #3
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:613
 __msan_warning+0x82/0xf0 mm/kmsan/kmsan_instr.c:313
 snd_pcm_hw_rule_add+0x745/0xdd0 sound/core/pcm_lib.c:1146
 snd_pcm_hw_constraints_init+0xc97/0x1ea0 sound/core/pcm_native.c:2184
 snd_pcm_open_substream+0x1b5/0x490 sound/core/pcm_native.c:2416
 snd_pcm_open_file sound/core/pcm_native.c:2450 [inline]
 snd_pcm_open+0x2f1/0xa60 sound/core/pcm_native.c:2517
 snd_pcm_capture_open+0x139/0x210 sound/core/pcm_native.c:2491
 snd_open+0x5f4/0x780 sound/core/sound.c:175
 chrdev_open+0xc5b/0xe00 fs/char_dev.c:417
 do_dentry_open+0xf4f/0x1750 fs/open.c:771
 vfs_open+0xaf/0xe0 fs/open.c:880
 do_last fs/namei.c:3418 [inline]
 path_openat+0x185b/0x6b90 fs/namei.c:3534
 do_filp_open+0x2b8/0x710 fs/namei.c:3564
 do_sys_open+0x640/0x960 fs/open.c:1063
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open+0xad/0xc0 fs/open.c:1076
 __x64_sys_open+0x4a/0x70 fs/open.c:1076
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x411e71
Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 b4 17 00 00 c3 48 83 ec 08 e8 2a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 73 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fab885907a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000411e71
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fab88590850
RBP: 000000000073bf00 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fab885916d4
R13: 00000000004c68da R14: 00000000004dbab8 R15: 00000000ffffffff

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline]
 kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:158
 kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176
 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2759 [inline]
 slab_alloc mm/slub.c:2767 [inline]
 __kmalloc_track_caller+0xafc/0xce0 mm/slub.c:4353
 __do_krealloc mm/slab_common.c:1489 [inline]
 krealloc+0x143/0x380 mm/slab_common.c:1536
 snd_pcm_hw_rule_add+0x375/0xdd0 sound/core/pcm_lib.c:1136
 snd_pcm_hw_constraints_init+0xc97/0x1ea0 sound/core/pcm_native.c:2184
 snd_pcm_open_substream+0x1b5/0x490 sound/core/pcm_native.c:2416
 snd_pcm_open_file sound/core/pcm_native.c:2450 [inline]
 snd_pcm_open+0x2f1/0xa60 sound/core/pcm_native.c:2517
 snd_pcm_capture_open+0x139/0x210 sound/core/pcm_native.c:2491
 snd_open+0x5f4/0x780 sound/core/sound.c:175
 chrdev_open+0xc5b/0xe00 fs/char_dev.c:417
 do_dentry_open+0xf4f/0x1750 fs/open.c:771
 vfs_open+0xaf/0xe0 fs/open.c:880
 do_last fs/namei.c:3418 [inline]
 path_openat+0x185b/0x6b90 fs/namei.c:3534
 do_filp_open+0x2b8/0x710 fs/namei.c:3564
 do_sys_open+0x640/0x960 fs/open.c:1063
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open+0xad/0xc0 fs/open.c:1076
 __x64_sys_open+0x4a/0x70 fs/open.c:1076
 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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