Warning: Permanently added '10.128.1.74' (ECDSA) to the list of known hosts.
2021/09/29 01:10:37 fuzzer started
2021/09/29 01:10:37 dialing manager at 10.128.0.248:24295
2021/09/29 01:10:38 syscalls: 828
2021/09/29 01:10:38 code coverage: enabled
2021/09/29 01:10:38 comparison tracing: enabled
2021/09/29 01:10:38 extra coverage: support is not implemented in syzkaller
2021/09/29 01:10:38 setuid sandbox: support is not implemented in syzkaller
2021/09/29 01:10:38 namespace sandbox: support is not implemented in syzkaller
2021/09/29 01:10:38 Android sandbox: support is not implemented in syzkaller
2021/09/29 01:10:38 fault injection: support is not implemented in syzkaller
2021/09/29 01:10:38 leak checking: support is not implemented in syzkaller
2021/09/29 01:10:38 net packet injection: enabled
2021/09/29 01:10:38 net device setup: support is not implemented in syzkaller
2021/09/29 01:10:38 concurrency sanitizer: support is not implemented in syzkaller
2021/09/29 01:10:38 devlink PCI setup: support is not implemented in syzkaller
2021/09/29 01:10:38 USB emulation: support is not implemented in syzkaller
2021/09/29 01:10:38 hci packet injection: support is not implemented in syzkaller
2021/09/29 01:10:38 wifi device emulation: support is not implemented in syzkaller
2021/09/29 01:10:38 802.15.4 emulation: support is not implemented in syzkaller
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login: Expensive timeout(9) function: 0xffffffff8184ff00(0) 0.026919179 s
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2021/09/29 01:10:52 starting 4 fuzzer processes
01:10:52 executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$DIOCGETSTATUS(r0, 0xc1a04415, &(0x7f0000000500))

01:10:52 executing program 1:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000004c0), 0x1, 0x0)
ioctl$DIOCGETSTATES(r0, 0xc0104419, &(0x7f0000000040))

01:10:52 executing program 2:
r0 = socket$inet6_sctp(0x1c, 0x1, 0x84)
setsockopt$inet6_sctp_SCTP_INITMSG(r0, 0x84, 0x3, &(0x7f0000000000)={0xffff}, 0x8)
connect$inet6(r0, &(0x7f0000000100)={0x1c, 0x1c, 0x0, 0x0, @remote={0xfe, 0x80, '\x00', 0x0}}, 0x1c)
setsockopt$inet6_sctp_SCTP_DEFAULT_SNDINFO(r0, 0x84, 0x1203, &(0x7f0000000300)={0x0, 0x0, 0x3}, 0x10)
setsockopt$inet_tcp_int(0xffffffffffffffff, 0x6, 0x0, 0x0, 0x0)

01:10:52 executing program 3:
r0 = socket$inet6_sctp(0x1c, 0x1, 0x84)
r1 = socket$inet6_sctp(0x1c, 0x1, 0x84)
r2 = dup2(r1, r1)
r3 = dup2(r0, r2)
sendmsg$inet_sctp(r3, &(0x7f0000000240)={&(0x7f0000000300)=@in6={0x1c, 0x1c, 0x2, 0x0, @local={0xfe, 0x80, '\x00', 0x0}}, 0x1c, &(0x7f0000000280)=[{&(0x7f0000000080)="ff", 0x1}], 0x1}, 0x0)
setsockopt$inet6_sctp_SCTP_SET_PEER_PRIMARY_ADDR(r3, 0x84, 0x6, &(0x7f0000000340)={@in={{0x10, 0x2, 0x1, @loopback}}}, 0x8c)
sendmsg$inet_sctp(r3, &(0x7f0000000580)={0x0, 0x0, 0x0}, 0x20108)

[fib_algo] inet.0 (bsearch4#26) rebuild_fd_flm: switching algo to radix4_lockless
01:10:53 executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$DIOCGETSTATUS(r0, 0xc1a04415, &(0x7f0000000500))

01:10:53 executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$DIOCGETSTATUS(r0, 0xc1a04415, &(0x7f0000000500))

01:10:53 executing program 0:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$DIOCGETSTATUS(r0, 0xc1a04415, &(0x7f0000000500))

01:10:53 executing program 1:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000004c0), 0x1, 0x0)
ioctl$DIOCGETSTATES(r0, 0xc0104419, &(0x7f0000000040))

01:10:53 executing program 1:
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000004c0), 0x1, 0x0)
ioctl$DIOCGETSTATES(r0, 0xc0104419, &(0x7f0000000040))

01:10:53 executing program 0:
r0 = socket(0x1c, 0x1, 0x0)
setsockopt$inet_tcp_TCP_FUNCTION_BLK(r0, 0x6, 0x2000, &(0x7f0000000040)={'bbr\x00'}, 0x24)
setsockopt$inet_tcp_int(r0, 0x6, 0x428, &(0x7f00000000c0), 0x4)

Kernel page fault with the following non-sleepable locks held:
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe009eaa6c70) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_usrreq.c:5851
stack backtrace:
#0 0xffffffff817fc8d3 at witness_debugger+0x173
#1 0xffffffff817fed43 at witness_warn+0x893
#2 0xffffffff821dd522 at trap_pfault+0x162
#3 0xffffffff821dbd17 at trap+0x5e7
#4 0xffffffff82181908 at calltrap+0x8
#5 0xffffffff84962ddc at sctp_med_chunk_output+0x190c
#6 0xffffffff8495e935 at sctp_chunk_output+0x2b25
#7 0xffffffff849c80a6 at sctp_setopt+0xdcf6
#8 0xffffffff849ba2bf at sctp_ctloutput+0x3df
#9 0xffffffff81882064 at sosetopt+0x234
#10 0xffffffff8188f0ec at kern_setsockopt+0x23c
#11 0xffffffff8188ee96 at sys_setsockopt+0x76
#12 0xffffffff82356cbf at ia32_syscall+0x41f
#13 0xffffffff82182aaf at int0x80_syscall_common+0x9c


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0xffffffffffffffff
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff849a0c92
stack pointer	        = 0x0:0xfffffe009bf52e80
frame pointer	        = 0x0:0xfffffe009bf52eb0
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interr
upt enabled, resume, IOPL = 0
current process		= 834 (syz-executor.3)
trap number		= 12