================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:352 [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 ffff888079683960 by task syz-executor.3/14719 CPU: 1 PID: 14719 Comm: syz-executor.3 Not tainted 5.0.0-rc8+ #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+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:130 memcpy include/linux/string.h:352 [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+0x1a1/0x2f0 sound/core/oss/pcm_plugin.c:651 snd_pcm_oss_read2+0x1f0/0x3f0 sound/core/oss/pcm_oss.c:1474 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1531 [inline] snd_pcm_oss_read+0x53a/0x6a0 sound/core/oss/pcm_oss.c:2752 __vfs_read+0x116/0x8c0 fs/read_write.c:416 vfs_read+0x194/0x3e0 fs/read_write.c:452 ksys_read+0xea/0x1f0 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 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:00007fdcaf835c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 000000000000105c RSI: 0000000020000380 RDI: 0000000000000004 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdcaf8366d4 R13: 00000000004c4a4e R14: 00000000004d8468 R15: 00000000ffffffff Allocated by task 14682: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:468 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:509 __do_kmalloc_node mm/slab.c:3678 [inline] __kmalloc_node+0x4e/0x70 mm/slab.c:3685 kmalloc_node include/linux/slab.h:588 [inline] kvmalloc_node+0x68/0x100 mm/util.c:416 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+0x148/0x330 sound/core/oss/pcm_plugin.c:129 snd_pcm_oss_change_params_locked+0x2118/0x3750 sound/core/oss/pcm_oss.c:1038 snd_pcm_oss_change_params+0x7b/0xd0 sound/core/oss/pcm_oss.c:1101 snd_pcm_oss_get_active_substream+0x136/0x190 sound/core/oss/pcm_oss.c:1118 snd_pcm_oss_get_rate sound/core/oss/pcm_oss.c:1768 [inline] snd_pcm_oss_set_rate sound/core/oss/pcm_oss.c:1760 [inline] snd_pcm_oss_ioctl+0x17a6/0x33b0 sound/core/oss/pcm_oss.c:2608 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe net_ratelimit: 12 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Freed by task 8053: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:457 kasan_slab_free+0xe/0x10 mm/kasan/common.c:465 __cache_free mm/slab.c:3494 [inline] kfree+0xcf/0x230 mm/slab.c:3811 ext4_ext_map_blocks+0x8ec/0x4e50 fs/ext4/extents.c:4506 ext4_map_blocks+0xecb/0x1a20 fs/ext4/inode.c:559 ext4_getblk+0xc4/0x510 fs/ext4/inode.c:966 ext4_bread+0x8f/0x230 fs/ext4/inode.c:1016 ext4_append+0x155/0x370 fs/ext4/namei.c:66 ext4_init_new_dir fs/ext4/namei.c:2589 [inline] ext4_mkdir+0x61b/0xdf0 fs/ext4/namei.c:2636 vfs_mkdir+0x433/0x690 fs/namei.c:3816 do_mkdirat+0x234/0x2a0 fs/namei.c:3839 __do_sys_mkdir fs/namei.c:3855 [inline] __se_sys_mkdir fs/namei.c:3853 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3853 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 ffff888079683900 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of 96-byte region [ffff888079683900, ffff888079683960) The buggy address belongs to the page: page:ffffea0001e5a0c0 count:1 mapcount:0 mapping:ffff88812c3f04c0 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea0002769b08 ffffea0002651008 ffff88812c3f04c0 raw: 0000000000000000 ffff888079683000 0000000100000020 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888079683800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888079683880: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888079683900: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ^ ffff888079683980: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888079683a00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================