9pnet: Insufficient options for proto=fd ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:348 [inline] BUG: KASAN: slab-out-of-bounds in default_read_copy_kernel+0xdb/0x130 sound/core/pcm_lib.c:1988 Write of size 5120 at addr ffff888080f7c080 by task syz-executor.2/10454 CPU: 0 PID: 10454 Comm: syz-executor.2 Not tainted 4.19.84 #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.cold+0x7c/0x20d mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x38/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:348 [inline] default_read_copy_kernel+0xdb/0x130 sound/core/pcm_lib.c:1988 interleaved_copy+0xce/0x100 sound/core/pcm_lib.c:2007 __snd_pcm_lib_xfer+0x101d/0x1ce6 sound/core/pcm_lib.c:2220 snd_pcm_oss_read3+0x1ca/0x420 sound/core/oss/pcm_oss.c:1275 io_capture_transfer+0x26c/0x300 sound/core/oss/io.c:73 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:1475 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1532 [inline] snd_pcm_oss_read+0x53a/0x6a0 sound/core/oss/pcm_oss.c:2753 __vfs_read+0x114/0x800 fs/read_write.c:416 vfs_read+0x194/0x3d0 fs/read_write.c:452 ksys_read+0x14f/0x2d0 fs/read_write.c:579 __do_sys_read fs/read_write.c:589 [inline] __se_sys_read fs/read_write.c:587 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:587 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a669 Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5773561c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000001000 RSI: 0000000020001880 RDI: 0000000000000003 RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f57735626d4 R13: 00000000004c800c R14: 00000000004de068 R15: 00000000ffffffff Allocated by task 10445: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node+0x51/0x80 mm/slab.c:3696 kmalloc_node include/linux/slab.h:557 [inline] kvmalloc_node+0xbd/0x100 mm/util.c:423 kvmalloc include/linux/mm.h:577 [inline] kvzalloc include/linux/mm.h:585 [inline] snd_pcm_plugin_alloc+0x594/0x760 sound/core/oss/pcm_plugin.c:70 snd_pcm_plug_alloc+0x16d/0x2f0 sound/core/oss/pcm_plugin.c:129 snd_pcm_oss_change_params_locked+0x210f/0x3750 sound/core/oss/pcm_oss.c:1039 snd_pcm_oss_change_params+0x7b/0xd0 sound/core/oss/pcm_oss.c:1102 snd_pcm_oss_get_active_substream+0x136/0x190 sound/core/oss/pcm_oss.c:1119 snd_pcm_oss_get_rate sound/core/oss/pcm_oss.c:1769 [inline] snd_pcm_oss_set_rate sound/core/oss/pcm_oss.c:1761 [inline] snd_pcm_oss_ioctl+0x13df/0x3390 sound/core/oss/pcm_oss.c:2609 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 9257: save_stack+0x45/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3503 [inline] kfree+0xcf/0x220 mm/slab.c:3822 kvfree+0x61/0x70 mm/util.c:452 snd_pcm_plugin_free+0xae/0xe0 sound/core/oss/pcm_plugin.c:194 snd_pcm_oss_plugin_clear sound/core/oss/pcm_oss.c:562 [inline] snd_pcm_oss_release_substream+0x11a/0x1f0 sound/core/oss/pcm_oss.c:2335 snd_pcm_release_substream.part.0+0x209/0x330 sound/core/pcm_native.c:2409 snd_pcm_release_substream+0x61/0x80 sound/core/pcm_native.c:2395 snd_pcm_oss_release_file.part.0+0x75/0xa0 sound/core/oss/pcm_oss.c:2383 snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2378 [inline] snd_pcm_oss_release+0x116/0x280 sound/core/oss/pcm_oss.c:2563 __fput+0x2dd/0x8b0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x145/0x1c0 kernel/task_work.c:113 get_signal+0x1baa/0x1fc0 kernel/signal.c:2385 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888080f7c080 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 0 bytes inside of 8192-byte region [ffff888080f7c080, ffff888080f7e080) The buggy address belongs to the page: page:ffffea000203df00 count:1 mapcount:0 mapping:ffff88812c3f2080 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000008100(slab|head) raw: 01fffc0000008100 ffffea000294fc08 ffffea000203f808 ffff88812c3f2080 raw: 0000000000000000 ffff888080f7c080 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888080f7d280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888080f7d300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888080f7d380: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff888080f7d400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888080f7d480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================