==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 lib/list_debug.c:26
Read of size 8 at addr ffff888049fc8620 by task syz-executor.5/25904
CPU: 1 PID: 25904 Comm: syz-executor.5 Not tainted 4.19.112-syzkaller #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+0x188/0x20d lib/dump_stack.c:118
print_address_description.cold+0x7c/0x212 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+0x88/0x2b9 mm/kasan/report.c:396
__list_add_valid+0x93/0xa0 lib/list_debug.c:26
__list_add include/linux/list.h:60 [inline]
list_add_tail include/linux/list.h:93 [inline]
cma_listen_on_all drivers/infiniband/core/cma.c:2380 [inline]
rdma_listen+0x609/0x880 drivers/infiniband/core/cma.c:3408
ucma_listen+0x14d/0x1c0 drivers/infiniband/core/ucma.c:1100
ucma_write+0x285/0x350 drivers/infiniband/core/ucma.c:1689
__vfs_write+0xf7/0x760 fs/read_write.c:485
vfs_write+0x206/0x550 fs/read_write.c:549
ksys_write+0x12b/0x2a0 fs/read_write.c:599
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
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:00007fe298549c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe29854a6d4 RCX: 000000000045c849
RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000006
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000cc0 R14: 00000000004cee66 R15: 000000000076bf0c
Allocated by task 24911:
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc mm/kasan/kasan.c:553 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531
__do_kmalloc_node mm/slab.c:3689 [inline]
__kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703
__kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:137
__alloc_skb+0xef/0x5b0 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:995 [inline]
nlmsg_new include/net/netlink.h:511 [inline]
audit_buffer_alloc kernel/audit.c:1682 [inline]
audit_log_start kernel/audit.c:1795 [inline]
audit_log_start+0x2c8/0x750 kernel/audit.c:1746
integrity_audit_msg+0x100/0x430 security/integrity/integrity_audit.c:41
ima_add_violation+0x163/0x1d0 security/integrity/ima/ima_api.c:154
ima_rdwr_violation_check security/integrity/ima/ima_main.c:116 [inline]
process_measurement+0xf89/0x1430 security/integrity/ima/ima_main.c:214
ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391
do_last fs/namei.c:3425 [inline]
path_openat+0x1086/0x4200 fs/namei.c:3537
do_filp_open+0x1a1/0x280 fs/namei.c:3567
do_sys_open+0x3c0/0x500 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 28:
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0xf7/0x140 mm/kasan/kasan.c:521
__cache_free mm/slab.c:3503 [inline]
kfree+0xce/0x220 mm/slab.c:3822
skb_free_head+0x91/0xb0 net/core/skbuff.c:554
skb_release_data+0x600/0x8c0 net/core/skbuff.c:574
skb_release_all+0x46/0x60 net/core/skbuff.c:631
__kfree_skb net/core/skbuff.c:645 [inline]
kfree_skb net/core/skbuff.c:663 [inline]
kfree_skb+0xe1/0x390 net/core/skbuff.c:657
kauditd_hold_skb+0x155/0x180 kernel/audit.c:583
kauditd_send_queue+0x12d/0x170 kernel/audit.c:742
kauditd_thread+0x6f4/0xa20 kernel/audit.c:868
kthread+0x34a/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
The buggy address belongs to the object at ffff888049fc8440
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 480 bytes inside of
2048-byte region [ffff888049fc8440, ffff888049fc8c40)
The buggy address belongs to the page:
page:ffffea000127f200 count:1 mapcount:0 mapping:ffff88812c3dcc40 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffffea00021fd208 ffffea0002a53308 ffff88812c3dcc40
raw: 0000000000000000 ffff888049fc8440 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888049fc8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888049fc8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888049fc8600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888049fc8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888049fc8700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================