RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007f7673c8c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 000080001d00c0d0 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffdb0b3c32f R14: 00007f7673c8c300 R15: 0000000000022000
MTD: Attempt to mount non-MTD device "/dev/loop5"
WARNING: can't dereference registers at 1ffff110174a0f90 for ip apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 18098 Comm: syz-executor.2 Not tainted 4.14.285-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x149 lib/fault-inject.c:149
 should_failslab+0xd6/0x130 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc+0x28e/0x3c0 mm/slab.c:3550
 kmem_cache_zalloc include/linux/slab.h:651 [inline]
 sctp_chunkify+0x4b/0x2d0 net/sctp/sm_make_chunk.c:1330
 _sctp_make_chunk+0x13d/0x250 net/sctp/sm_make_chunk.c:1403
 sctp_make_data net/sctp/sm_make_chunk.c:1424 [inline]
 sctp_make_datafrag_empty+0x146/0x210 net/sctp/sm_make_chunk.c:738
 sctp_datamsg_from_user+0x5ea/0xdd0 net/sctp/chunk.c:268
 sctp_sendmsg+0x1339/0x2f30 net/sctp/socket.c:2037
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 sock_no_sendpage+0xe2/0x110 net/core/sock.c:2610
 kernel_sendpage net/socket.c:3409 [inline]
 sock_sendpage+0x10d/0x140 net/socket.c:871
 pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x326/0x7a0 fs/splice.c:626
 splice_from_pipe fs/splice.c:661 [inline]
 generic_splice_sendpage+0xc1/0x110 fs/splice.c:832
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x115/0x160 fs/splice.c:1018
 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973
 do_splice_direct+0x164/0x210 fs/splice.c:1061
 do_sendfile+0x47f/0xb30 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1502 [inline]
 SyS_sendfile64+0xff/0x110 fs/read_write.c:1488
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f7675317109
RSP: 002b:00007f7673c8c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7675429f60 RCX: 00007f7675317109
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007f7673c8c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 000080001d00c0d0 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffdb0b3c32f R14: 00007f7673c8c300 R15: 0000000000022000
FAT-fs (loop5): Unrecognized mount option "measure" or missing value
==================================================================
BUG: KASAN: stack-out-of-bounds in deref_stack_regs arch/x86/kernel/unwind_orc.c:304 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:437
Read of size 8 at addr ffff8880a5077818 by task syz-executor.1/18188

CPU: 1 PID: 18188 Comm: syz-executor.1 Not tainted 4.14.285-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 deref_stack_regs arch/x86/kernel/unwind_orc.c:304 [inline]
 unwind_next_frame+0x146f/0x17d0 arch/x86/kernel/unwind_orc.c:437
 perf_callchain_kernel+0x38c/0x520 arch/x86/events/core.c:2344
 get_perf_callchain+0x2de/0x740 kernel/events/callchain.c:217
 perf_callchain+0x147/0x190 kernel/events/callchain.c:190
 perf_prepare_sample+0xc9a/0x1370 kernel/events/core.c:6166
 __perf_event_output kernel/events/core.c:6282 [inline]
 perf_event_output_forward+0xc9/0x1f0 kernel/events/core.c:6300
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7549
 perf_swevent_overflow kernel/events/core.c:7625 [inline]
 perf_swevent_event+0x299/0x460 kernel/events/core.c:7653
 perf_tp_event+0x540/0x6e0 kernel/events/core.c:8087
 perf_trace_run_bpf_submit+0x119/0x200 kernel/events/core.c:8057
 perf_trace_lock+0x2d6/0x490 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x4df/0x870 kernel/locking/lockdep.c:4016
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:184
 rcu_preempt_ctxt_queue kernel/rcu/tree_plugin.h:270 [inline]
 rcu_preempt_note_context_switch kernel/rcu/tree_plugin.h:352 [inline]
 rcu_note_context_switch+0xa8a/0x1590 kernel/rcu/tree.c:458
 __schedule+0x1d7/0x1de0 kernel/sched/core.c:3317
 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3614
 retint_kernel+0x1b/0x2d
RIP: 0010:__sctp_v6_cmp_addr+0x7a/0x460 net/sctp/ipv6.c:539
RSP: 0018:ffff8880a5077a80 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff02
RAX: 0000000000000001 RBX: ffff8880afd586a0 RCX: 1ffffffff1198fad
RDX: 0000000000000000 RSI: ffff8880a5077b58 RDI: ffff8880afd586a0
RBP: ffff8880a5077b58 R08: 0000000000000000 R09: 0000000000020011
R10: ffff8880b4938ad8 R11: ffff8880b4938200 R12: 0000000000000002
R13: 000000000000000a R14: ffffffff89e4af40 R15: fffffbfff13c95f0
 sctp_v6_cmp_addr+0x1a/0xc0 net/sctp/ipv6.c:574
 sctp_bind_addr_state+0x129/0x2c0 net/sctp/bind_addr.c:396
 sctp_copy_local_addr_list+0x1d6/0x400 net/sctp/protocol.c:227
 sctp_copy_one_addr net/sctp/bind_addr.c:452 [inline]
 sctp_bind_addr_copy+0xde/0x430 net/sctp/bind_addr.c:71
 __sctp_connect+0x639/0xbb0 net/sctp/socket.c:1235
 sctp_connect net/sctp/socket.c:4210 [inline]
 sctp_inet_connect+0x13a/0x1d0 net/sctp/socket.c:4225
 SYSC_connect net/socket.c:1655 [inline]
 SyS_connect+0x1f4/0x240 net/socket.c:1636
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f85d7c46109
RSP: 002b:00007f85d65bb168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f85d7d58f60 RCX: 00007f85d7c46109
RDX: 000000000000001c RSI: 0000000020000080 RDI: 0000000000000005
RBP: 00007f85d7ca005d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf74b496f R14: 00007f85d65bb300 R15: 0000000000022000

The buggy address belongs to the page:
page:ffffea0002941dc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0xfff00000000000()
raw: 00fff00000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a5077700: 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00
 ffff8880a5077780: f3 f3 f3 00 00 00 00 00 00 00 00 00 00 f1 f1 f1
>ffff8880a5077800: f1 04 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00
                            ^
 ffff8880a5077880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880a5077900: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 00
==================================================================