================================================================== BUG: KASAN: use-after-free in _aead_recvmsg crypto/algif_aead.c:297 [inline] BUG: KASAN: use-after-free in aead_recvmsg+0x1827/0x1bc0 crypto/algif_aead.c:329 Write of size 4 at addr ffff8801ca768bf4 by task syz-executor4/17329 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 17340 Comm: syz-executor5 Not tainted 4.15.0-rc2+ #207 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3371 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3545 aio_get_req fs/aio.c:1033 [inline] io_submit_one fs/aio.c:1562 [inline] do_io_submit+0x353/0x14f0 fs/aio.c:1682 SYSC_io_submit fs/aio.c:1707 [inline] SyS_io_submit+0x27/0x30 fs/aio.c:1704 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x4529d9 RSP: 002b:00007fba127c7c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007fba127c7aa0 RCX: 00000000004529d9 RDX: 0000000020bd9fe0 RSI: 0000000000000001 RDI: 00007fba127a7000 RBP: 00007fba127c7a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b759b R13: 00007fba127c7bc8 R14: 00000000004b759b R15: 0000000000000000 CPU: 1 PID: 17329 Comm: syz-executor4 Not tainted 4.15.0-rc2+ #207 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_store4_noabort+0x17/0x20 mm/kasan/report.c:434 _aead_recvmsg crypto/algif_aead.c:297 [inline] aead_recvmsg+0x1827/0x1bc0 crypto/algif_aead.c:329 sock_recvmsg_nosec net/socket.c:805 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:812 sock_read_iter+0x361/0x560 net/socket.c:889 call_read_iter include/linux/fs.h:1766 [inline] aio_read+0x2b0/0x3a0 fs/aio.c:1501 io_submit_one fs/aio.c:1611 [inline] do_io_submit+0xf99/0x14f0 fs/aio.c:1682 SYSC_io_submit fs/aio.c:1707 [inline] SyS_io_submit+0x27/0x30 fs/aio.c:1704 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x4529d9 RSP: 002b:00007fa6ba0a6c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9 RDX: 0000000020bd9fe0 RSI: 0000000000000001 RDI: 00007fa6ba085000 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed0b8 R13: 00000000ffffffff R14: 00007fa6ba0a76d4 R15: 0000000000000000 Allocated by task 17329: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 __do_kmalloc mm/slab.c:3711 [inline] __kmalloc+0x162/0x760 mm/slab.c:3720 kmalloc include/linux/slab.h:504 [inline] sock_kmalloc+0x112/0x190 net/core/sock.c:1979 af_alg_alloc_areq+0x74/0x2f0 crypto/af_alg.c:1095 _aead_recvmsg crypto/algif_aead.c:152 [inline] aead_recvmsg+0x443/0x1bc0 crypto/algif_aead.c:329 sock_recvmsg_nosec net/socket.c:805 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:812 sock_read_iter+0x361/0x560 net/socket.c:889 call_read_iter include/linux/fs.h:1766 [inline] aio_read+0x2b0/0x3a0 fs/aio.c:1501 io_submit_one fs/aio.c:1611 [inline] do_io_submit+0xf99/0x14f0 fs/aio.c:1682 SYSC_io_submit fs/aio.c:1707 [inline] SyS_io_submit+0x27/0x30 fs/aio.c:1704 entry_SYSCALL_64_fastpath+0x1f/0x96 Freed by task 24: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3491 [inline] kfree+0xca/0x250 mm/slab.c:3806 __sock_kfree_s net/core/sock.c:2000 [inline] sock_kfree_s+0x29/0x60 net/core/sock.c:2006 af_alg_free_resources+0x6b/0x80 crypto/af_alg.c:1031 af_alg_async_cb+0xbc/0x160 crypto/af_alg.c:1054 aead_request_complete include/crypto/internal/aead.h:75 [inline] pcrypt_aead_serial+0x75/0xa0 crypto/pcrypt.c:123 padata_serial_worker+0x476/0x750 kernel/padata.c:348 process_one_work+0xbfd/0x1be0 kernel/workqueue.c:2112 worker_thread+0x223/0x1990 kernel/workqueue.c:2246 kthread+0x37a/0x440 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:441 The buggy address belongs to the object at ffff8801ca768900 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 756 bytes inside of 1024-byte region [ffff8801ca768900, ffff8801ca768d00) The buggy address belongs to the page: page:00000000e0015ecf count:1 mapcount:0 mapping:00000000078af355 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801ca768000 0000000000000000 0000000100000007 raw: ffffea000744d220 ffffea00072891a0 ffff8801db000ac0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ca768a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801ca768b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801ca768b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801ca768c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801ca768c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================