================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:380 [inline] BUG: KASAN: slab-out-of-bounds in do_convert sound/core/oss/linear.c:48 [inline] BUG: KASAN: slab-out-of-bounds in convert sound/core/oss/linear.c:81 [inline] BUG: KASAN: slab-out-of-bounds in linear_transfer sound/core/oss/linear.c:110 [inline] BUG: KASAN: slab-out-of-bounds in linear_transfer+0x6de/0x970 sound/core/oss/linear.c:88 Read of size 1 at addr ffff8880a7407440 by task syz-executor.0/9307 CPU: 0 PID: 9307 Comm: syz-executor.0 Not tainted 5.4.0-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+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:638 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 memcpy+0x24/0x50 mm/kasan/common.c:124 memcpy include/linux/string.h:380 [inline] do_convert sound/core/oss/linear.c:48 [inline] convert sound/core/oss/linear.c:81 [inline] linear_transfer sound/core/oss/linear.c:110 [inline] linear_transfer+0x6de/0x970 sound/core/oss/linear.c:88 snd_pcm_plug_read_transfer+0x197/0x2e0 sound/core/oss/pcm_plugin.c:651 snd_pcm_oss_read2+0x1f0/0x3f0 sound/core/oss/pcm_oss.c:1460 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1517 [inline] snd_pcm_oss_read+0x548/0x6a0 sound/core/oss/pcm_oss.c:2741 __vfs_read+0x8a/0x110 fs/read_write.c:425 vfs_read+0x1f0/0x440 fs/read_write.c:461 ksys_read+0x14f/0x290 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __ia32_sys_read+0x71/0xb0 fs/read_write.c:595 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f9fa39 Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7f9b0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000380 RDX: 0000000000001000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 9307: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:485 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:526 __do_kmalloc_node mm/slab.c:3616 [inline] __kmalloc_node+0x4e/0x70 mm/slab.c:3623 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0x68/0x100 mm/util.c:574 kvmalloc include/linux/mm.h:655 [inline] kvzalloc include/linux/mm.h:663 [inline] snd_pcm_plugin_alloc+0x585/0x770 sound/core/oss/pcm_plugin.c:70 snd_pcm_plug_alloc+0x146/0x330 sound/core/oss/pcm_plugin.c:129 snd_pcm_oss_change_params_locked+0x210f/0x3750 sound/core/oss/pcm_oss.c:1024 snd_pcm_oss_change_params+0x7b/0xd0 sound/core/oss/pcm_oss.c:1087 snd_pcm_oss_get_active_substream+0x136/0x190 sound/core/oss/pcm_oss.c:1104 snd_pcm_oss_get_rate sound/core/oss/pcm_oss.c:1754 [inline] snd_pcm_oss_set_rate sound/core/oss/pcm_oss.c:1746 [inline] snd_pcm_oss_ioctl+0x1794/0x33a0 sound/core/oss/pcm_oss.c:2593 snd_pcm_oss_ioctl_compat+0x24/0x30 sound/core/oss/pcm_oss.c:2724 __do_compat_sys_ioctl fs/compat_ioctl.c:214 [inline] __se_compat_sys_ioctl fs/compat_ioctl.c:142 [inline] __ia32_compat_sys_ioctl+0x233/0x610 fs/compat_ioctl.c:142 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8880a7407400 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes to the right of 64-byte region [ffff8880a7407400, ffff8880a7407440) The buggy address belongs to the page: page:ffffea00029d01c0 refcount:1 mapcount:0 mapping:ffff8880aa400380 index:0x0 raw: 00fffe0000000200 ffffea00025fa2c8 ffffea0002697c88 ffff8880aa400380 raw: 0000000000000000 ffff8880a7407000 0000000100000020 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a7407300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880a7407380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880a7407400: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8880a7407480: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ffff8880a7407500: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ==================================================================