RDX: 0000000000000001 RSI: 0000000020001640 RDI: 0000000000000003 RBP: 00007fed2693eca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed2693f6d4 R13: 00000000004aab09 R14: 00000000006e8c28 R15: 0000000000000004 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:352 [inline] BUG: KASAN: slab-out-of-bounds in default_read_copy_kernel+0xe1/0x140 sound/core/pcm_lib.c:1988 Write of size 64 at addr ffff880058e03600 by task syz-executor1/7447 CPU: 1 PID: 7447 Comm: syz-executor1 Not tainted 4.20.0-rc1+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 memcpy+0x37/0x50 mm/kasan/kasan.c:303 memcpy include/linux/string.h:352 [inline] default_read_copy_kernel+0xe1/0x140 sound/core/pcm_lib.c:1988 interleaved_copy+0xd1/0x110 sound/core/pcm_lib.c:2007 __snd_pcm_lib_xfer+0x115f/0x1f23 sound/core/pcm_lib.c:2227 snd_pcm_oss_read3+0x1c8/0x410 sound/core/oss/pcm_oss.c:1274 io_capture_transfer+0x27d/0x310 sound/core/oss/io.c:73 snd_pcm_plug_read_transfer+0x1d7/0x3b0 sound/core/oss/pcm_plugin.c:651 snd_pcm_oss_read2+0x221/0x450 sound/core/oss/pcm_oss.c:1474 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1531 [inline] snd_pcm_oss_read+0x638/0x830 sound/core/oss/pcm_oss.c:2752 do_loop_readv_writev fs/read_write.c:700 [inline] do_iter_read+0x4a3/0x650 fs/read_write.c:924 vfs_readv+0x175/0x1c0 fs/read_write.c:986 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 do_readv+0x11a/0x310 fs/read_write.c:1019 __do_sys_readv fs/read_write.c:1106 [inline] __se_sys_readv fs/read_write.c:1103 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x456fc9 Code: 5d af 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 2b af fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fed2693ec88 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 000000000071bf00 RCX: 0000000000456fc9 RDX: 0000000000000001 RSI: 0000000020001640 RDI: 0000000000000003 RBP: 00007fed2693eca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed2693f6d4 R13: 00000000004aab09 R14: 00000000006e8c28 R15: 0000000000000004 CPU: 0 PID: 7470 Comm: syz-executor4 Not tainted 4.20.0-rc1+ #1 Allocated by task 7447: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3684 [inline] __kmalloc_node+0x50/0x70 mm/slab.c:3691 Call Trace: kmalloc_node include/linux/slab.h:589 [inline] kvmalloc_node+0x65/0xf0 mm/util.c:416 kvmalloc include/linux/mm.h:577 [inline] kvzalloc include/linux/mm.h:585 [inline] snd_pcm_plugin_alloc+0x577/0x770 sound/core/oss/pcm_plugin.c:70 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 snd_pcm_plug_alloc+0x149/0x340 sound/core/oss/pcm_plugin.c:129 snd_pcm_oss_change_params_locked+0x2209/0x3c60 sound/core/oss/pcm_oss.c:1038 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 snd_pcm_oss_make_ready_locked+0xbc/0x130 sound/core/oss/pcm_oss.c:1183 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1507 [inline] snd_pcm_oss_read+0x417/0x830 sound/core/oss/pcm_oss.c:2752 do_loop_readv_writev fs/read_write.c:700 [inline] do_iter_read+0x4a3/0x650 fs/read_write.c:924 vfs_readv+0x175/0x1c0 fs/read_write.c:986 do_readv+0x11a/0x310 fs/read_write.c:1019 __do_sys_readv fs/read_write.c:1106 [inline] __se_sys_readv fs/read_write.c:1103 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1103 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 16: save_stack+0x43/0xd0 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:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3817 kzfree+0x28/0x30 mm/slab_common.c:1564 aa_free_task_ctx security/apparmor/include/task.h:61 [inline] apparmor_task_free+0x13a/0x1e0 security/apparmor/lsm.c:95 security_task_free+0x4a/0x80 security/security.c:1007 __put_task_struct+0x195/0x620 kernel/fork.c:724 __should_failslab+0x124/0x180 mm/failslab.c:32 put_task_struct include/linux/sched/task.h:96 [inline] delayed_put_task_struct+0x2ff/0x4c0 kernel/exit.c:181 should_failslab+0x9/0x14 mm/slab_common.c:1578 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2437 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline] rcu_process_callbacks+0x100a/0x1ac0 kernel/rcu/tree.c:2697 __do_softirq+0x308/0xb7e kernel/softirq.c:292 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 The buggy address belongs to the object at ffff880058e03600 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff880058e03600, ffff880058e03620) kmalloc_array include/linux/slab.h:669 [inline] kcalloc include/linux/slab.h:680 [inline] constrain_params_by_rules+0x149/0x13b0 sound/core/pcm_native.c:371 The buggy address belongs to the page: page:ffffea00016380c0 count:1 mapcount:0 mapping:ffff88006c0001c0 index:0xffff880058e03fc1 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea0001a88508 ffffea0001aaf008 ffff88006c0001c0 raw: ffff880058e03fc1 ffff880058e03000 000000010000003f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff880058e03500: 00 06 fc fc fc fc fc fc 00 07 fc fc fc fc fc fc ffff880058e03580: 00 00 fc fc fc fc fc fc fb fb fb fb fc fc fc fc >ffff880058e03600: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff880058e03680: 00 00 03 fc fc fc fc fc 00 01 fc fc fc fc fc fc ffff880058e03700: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================