R10: 0000000000000000 R11: 0000000000000246 R12: 00007f94f75eb6d4 R13: 00000000004c6ed7 R14: 00000000004dc798 R15: 0000000000000006 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:352 [inline] BUG: KASAN: slab-out-of-bounds in default_write_copy_kernel+0xdc/0x130 sound/core/pcm_lib.c:1946 Read of size 64 at addr ffff8880a825f140 by task syz-executor.4/8535 CPU: 1 PID: 8535 Comm: syz-executor.4 Not tainted 5.0.0+ #19 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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 memcpy+0x24/0x50 mm/kasan/common.c:132 memcpy include/linux/string.h:352 [inline] default_write_copy_kernel+0xdc/0x130 sound/core/pcm_lib.c:1946 interleaved_copy+0xd0/0x100 sound/core/pcm_lib.c:2007 __snd_pcm_lib_xfer+0xea3/0x1cfa sound/core/pcm_lib.c:2225 snd_pcm_oss_write3+0xee/0x230 sound/core/oss/pcm_oss.c:1237 io_playback_transfer+0x280/0x330 sound/core/oss/io.c:47 snd_pcm_plug_write_transfer+0x30c/0x400 sound/core/oss/pcm_plugin.c:620 snd_pcm_oss_write2+0x250/0x410 sound/core/oss/pcm_oss.c:1366 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1432 [inline] snd_pcm_oss_write+0x6c2/0x8f0 sound/core/oss/pcm_oss.c:2774 __vfs_write+0x8d/0x110 fs/read_write.c:485 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0xea/0x1f0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457f29 Code: ad b8 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 b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f94f75eac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f94f75eac90 RCX: 0000000000457f29 RDX: 00000000fffffefd RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f94f75eb6d4 R13: 00000000004c6ed7 R14: 00000000004dc798 R15: 0000000000000006 Allocated by task 8535: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511 __do_kmalloc_node mm/slab.c:3686 [inline] __kmalloc_node+0x4e/0x70 mm/slab.c:3693 kmalloc_node include/linux/slab.h:588 [inline] kvmalloc_node+0x68/0x100 mm/util.c:430 kvmalloc include/linux/mm.h:604 [inline] kvzalloc include/linux/mm.h:612 [inline] snd_pcm_plugin_alloc+0x585/0x770 sound/core/oss/pcm_plugin.c:70 snd_pcm_plug_alloc+0x212/0x330 sound/core/oss/pcm_plugin.c:117 snd_pcm_oss_change_params_locked+0x2118/0x3750 sound/core/oss/pcm_oss.c:1038 snd_pcm_oss_make_ready_locked+0xbc/0x130 sound/core/oss/pcm_oss.c:1183 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1397 [inline] snd_pcm_oss_write+0x42b/0x8f0 sound/core/oss/pcm_oss.c:2774 __vfs_write+0x8d/0x110 fs/read_write.c:485 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0xea/0x1f0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 29404: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:459 kasan_slab_free+0xe/0x10 mm/kasan/common.c:467 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3821 tomoyo_find_next_domain+0x6f3/0x1f8a security/tomoyo/domain.c:873 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:107 [inline] tomoyo_bprm_check_security+0x12a/0x1b0 security/tomoyo/tomoyo.c:97 security_bprm_check+0x69/0xb0 security/security.c:751 search_binary_handler+0x77/0x570 fs/exec.c:1644 exec_binprm fs/exec.c:1698 [inline] __do_execve_file.isra.0+0x1394/0x23f0 fs/exec.c:1818 do_execveat_common fs/exec.c:1865 [inline] do_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1958 [inline] __se_sys_execve fs/exec.c:1953 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1953 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a825f140 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8880a825f140, ffff8880a825f160) The buggy address belongs to the page: page:ffffea0002a097c0 count:1 mapcount:0 mapping:ffff88812c3f01c0 index:0xffff8880a825ffc1 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea00021dcb48 ffffea0002827888 ffff88812c3f01c0 raw: ffff8880a825ffc1 ffff8880a825f000 000000010000002b 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a825f000: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880a825f080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880a825f100: fb fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff8880a825f180: fb fb fb fb fc fc fc fc 00 fc fc fc fc fc fc fc ffff8880a825f200: 00 00 fc fc fc fc fc fc 05 fc fc fc fc fc fc fc ==================================================================