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BUG: KMSAN: uninit-value in __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline]
BUG: KMSAN: uninit-value in __fswab32 include/uapi/linux/swab.h:59 [inline]
BUG: KMSAN: uninit-value in do_convert sound/core/oss/linear.c:50 [inline]
BUG: KMSAN: uninit-value in convert sound/core/oss/linear.c:81 [inline]
BUG: KMSAN: uninit-value in linear_transfer+0x92d/0xca0 sound/core/oss/linear.c:110
CPU: 0 PID: 10198 Comm: syz-executor1 Not tainted 4.20.0-rc3+ #101
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+0x32d/0x480 lib/dump_stack.c:113
 kmsan_report+0x12c/0x290 mm/kmsan/kmsan.c:682
 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:316
 __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline]
 __fswab32 include/uapi/linux/swab.h:59 [inline]
 do_convert sound/core/oss/linear.c:50 [inline]
 convert sound/core/oss/linear.c:81 [inline]
 linear_transfer+0x92d/0xca0 sound/core/oss/linear.c:110
 snd_pcm_plug_read_transfer+0x3bf/0x590 sound/core/oss/pcm_plugin.c:659
 snd_pcm_oss_read2 sound/core/oss/pcm_oss.c:1480 [inline]
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1518 [inline]
 snd_pcm_oss_read+0xeb2/0x1ca0 sound/core/oss/pcm_oss.c:2758
 __vfs_read+0x1e2/0xb00 fs/read_write.c:416
 vfs_read+0x380/0x6b0 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+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457569
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5b5a1bbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000184 RSI: 0000000020002180 RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5b5a1bc6d4
R13: 00000000004c38f5 R14: 00000000004d5dd0 R15: 00000000ffffffff

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:245 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:260 [inline]
 kmsan_internal_chain_origin+0x13d/0x240 mm/kmsan/kmsan.c:468
 kmsan_memcpy_memmove_metadata+0x1a9/0xf70 mm/kmsan/kmsan.c:343
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:361
 __msan_memcpy+0x61/0x70 mm/kmsan/kmsan_instr.c:148
 do_convert sound/core/oss/linear.c:48 [inline]
 convert sound/core/oss/linear.c:81 [inline]
 linear_transfer+0x74c/0xca0 sound/core/oss/linear.c:110
 snd_pcm_plug_read_transfer+0x3bf/0x590 sound/core/oss/pcm_plugin.c:659
 snd_pcm_oss_read2 sound/core/oss/pcm_oss.c:1480 [inline]
 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1518 [inline]
 snd_pcm_oss_read+0xeb2/0x1ca0 sound/core/oss/pcm_oss.c:2758
 __vfs_read+0x1e2/0xb00 fs/read_write.c:416
 vfs_read+0x380/0x6b0 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+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Uninit was created at:
 kmsan_save_stack_with_flags+0x51/0x100 mm/kmsan/kmsan.c:245
 kmsan_internal_alloc_meta_for_pages+0x10e/0x640 mm/kmsan/kmsan_hooks.c:102
 kmsan_alloc_page+0x77/0xc0 mm/kmsan/kmsan_hooks.c:402
 __alloc_pages_nodemask+0x175b/0x63e0 mm/page_alloc.c:4416
 alloc_pages_current+0x55d/0x7d0 mm/mempolicy.c:2080
 alloc_pages include/linux/gfp.h:511 [inline]
 __vmalloc_area_node mm/vmalloc.c:1693 [inline]
 __vmalloc_node_range+0x88b/0x10f0 mm/vmalloc.c:1756
 __vmalloc_node mm/vmalloc.c:1801 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1815 [inline]
 vmalloc+0xd8/0xf0 mm/vmalloc.c:1837
 snd_pcm_plugin_alloc+0x255/0xc80 sound/core/oss/pcm_plugin.c:71
 snd_pcm_plug_alloc+0x261/0x5f0 sound/core/oss/pcm_plugin.c:137
 snd_pcm_oss_change_params_locked+0x5e40/0x6e30 sound/core/oss/pcm_oss.c:1039
 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1107 [inline]
 snd_pcm_oss_get_active_substream+0x4f7/0x5a0 sound/core/oss/pcm_oss.c:1124
 snd_pcm_oss_get_rate sound/core/oss/pcm_oss.c:1774 [inline]
 snd_pcm_oss_set_rate sound/core/oss/pcm_oss.c:1766 [inline]
 snd_pcm_oss_ioctl+0x4abf/0x8800 sound/core/oss/pcm_oss.c:2614
 do_vfs_ioctl+0xefc/0x2ca0 fs/ioctl.c:46
 ksys_ioctl fs/ioctl.c:713 [inline]
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl+0x1da/0x270 fs/ioctl.c:718
 __x64_sys_ioctl+0x4a/0x70 fs/ioctl.c:718
 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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