sshd (5230) used greatest stack depth: 16200 bytes left
startpar (5163) used greatest stack depth: 15984 bytes left
==================================================================
BUG: KASAN: slab-out-of-bounds in sctp_getsockopt_pr_streamstatus net/sctp/socket.c:7174 [inline]
BUG: KASAN: slab-out-of-bounds in sctp_getsockopt+0x7516/0x7cc2 net/sctp/socket.c:7582
Read of size 8 at addr ffff8801bdb97668 by task syz-executor672/5321

CPU: 1 PID: 5321 Comm: syz-executor672 Not tainted 4.19.0+ #206
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+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
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 sctp_getsockopt_pr_streamstatus net/sctp/socket.c:7174 [inline]
 sctp_getsockopt+0x7516/0x7cc2 net/sctp/socket.c:7582
 compat_sock_common_getsockopt+0x10c/0x150 net/core/sock.c:2950
 __compat_sys_getsockopt+0x1b6/0x8a0 net/compat.c:530
 __do_compat_sys_getsockopt net/compat.c:543 [inline]
 __se_compat_sys_getsockopt net/compat.c:540 [inline]
 __ia32_compat_sys_getsockopt+0xbd/0x150 net/compat.c:540
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7ff7a29
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f7ff31ec EFLAGS: 00000296 ORIG_RAX: 000000000000016d
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000084
RDX: 0000000000000074 RSI: 0000000020000080 RDI: 0000000020000040
RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 5322:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
 kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620
 kmalloc include/linux/slab.h:513 [inline]
 kzalloc include/linux/slab.h:707 [inline]
 sctp_stream_init_ext+0x4f/0xf0 net/sctp/stream.c:237
 sctp_sendmsg_to_asoc+0x1308/0x1a20 net/sctp/socket.c:1896
 sctp_sendmsg+0x13c2/0x1da0 net/sctp/socket.c:2113
 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:631
 __sys_sendto+0x3d7/0x670 net/socket.c:1788
 __do_sys_sendto net/socket.c:1800 [inline]
 __se_sys_sendto net/socket.c:1796 [inline]
 __ia32_sys_sendto+0xdf/0x1a0 net/socket.c:1796
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Freed by task 3308:
 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:3813
 kzfree+0x28/0x30 mm/slab_common.c:1543
 aa_free_file_ctx security/apparmor/include/file.h:76 [inline]
 apparmor_file_free_security+0x133/0x1a0 security/apparmor/lsm.c:448
 security_file_free+0x4a/0x80 security/security.c:900
 file_free fs/file_table.c:54 [inline]
 __fput+0x4e8/0xa30 fs/file_table.c:294
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801bdb97600
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 8 bytes to the right of
 96-byte region [ffff8801bdb97600, ffff8801bdb97660)
The buggy address belongs to the page:
page:ffffea0006f6e5c0 count:1 mapcount:0 mapping:ffff8801da8004c0 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006f774c8 ffffea0006f772c8 ffff8801da8004c0
raw: 0000000000000000 ffff8801bdb97000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801bdb97500: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8801bdb97580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8801bdb97600: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
                                                          ^
 ffff8801bdb97680: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8801bdb97700: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
==================================================================