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https://bugzilla.mindrot.org/show_bug.cgi?id=3417

Bug ID: 3417
Summary: Crash of sshd with exit code 6 SIGABRT
Product: Portable OpenSSH
Version: 8.0p1
Hardware: Other
OS: Linux
Status: NEW
Severity: critical
Priority: P5
Component: sshd
Assignee: unassigned-bugs@mindrot.org
Reporter: narcislachausse@gmail.com

Hello,

I am currently using the v8.0p1 openssh version and during automate
testing of the system found a crash of sshd with the occurence: 4 times
in 460 cycles.

The following stacktrace has been extracted:
=======================================================================
Core was generated by `sshd: [net]
'.
Program terminated with signal SIGABRT, Aborted.

#0 __GI_raise (sig=sig@entry=6) at
../sysdeps/unix/sysv/linux/raise.c:51
set = {__val = {0, 0, 96, 67, 101, 213, 243, 129, 67, 152, 37,
232, 91, 226, 87, 184, 10, 116, 186, 106, 98, 129, 131,
101,
21, 199, 54, 106, 25, 74, 243, 116}}
pid = <optimized out>
tid = <optimized out>
ret = <optimized out>

#1 0xb6bf2e74 in __GI_abort () at abort.c:79
save_stage = 1
act =
{__sigaction_handler = {sa_handler = 0x152,
sa_sigaction = 0x152}, sa_mask = {__val = {3067101776, 7,
0,
344, 3067103204, 61, 2147410092, 91, 43, 360, 110,
3070047952, 5, 43, 0, 335, 0, 124, 0, 119, 1311297405,
44,
2136970460, 44, 2136970460, 2147483400, 2147445960,
3066275400, 2147445960, 3066258516, 253, 273}},
sa_flags = 2147483400, sa_restorer = 0x7f5f94dc}
sigs = {__val = {32, 0 <repeats 31 times>}}

#2 0x7f5f8a94 in __subvsi3 (
a=<optimized out>, b=<optimized out>)
at ../../../libgcc/libgcc2.c:119
w = <optimized out>

#3 0x7f5f72a4 in strlcpy ()
No symbol table info available.

#4 0x7f5d7494 in xstrdup ()
No symbol table info available.

#5 0x7f5cf884 in match_list ()
No symbol table info available.

#6 0x7f5e35fc in kex_names_cat ()
No symbol table info available.

#7 0x7f5e37cc in kex_assemble_names ()
No symbol table info available.

#8 0x7f592c40 in assemble_algorithms ()
No symbol table info available.

#9 0x7f597fb4 in copy_set_server_options ()
No symbol table info available.

#10 0x7f5ae578 in mm_getpwnamallow ()
No symbol table info available.

#11 0x7f59eaf8 in input_userauth_request ()
No symbol table info available.
=======================================================================

Thank you in advance,
Narcis

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