https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258196
Bug ID: 258196
Summary: Kernel panic on pf_free_state with HardenedBSD
Product: Base System
Version: 12.2-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Hi everyone,
We're currently experiencing kernel panics on HardenedBSD machines following
12.2-stable :
uname -a :
FreeBSD [redacted] 12.2-STABLE-HBSD FreeBSD 12.2-STABLE-HBSD #0 : Tue Aug 10
20:14:33 UTC 2021
[email protected]:/usr/obj/usr/src/amd64.amd64/sys/HARDENEDBSD
amd64
Since an update of kernel around July, some of our machines began rebooting at
random times following a kernel panic :
/var/crash/info.0 :
Dump header from device: /dev/da1
Architecture: amd64
Architecture Version: 2
Dump Length: 626298880
Blocksize: 512
Compression: none
Dumptime: Tue Aug 31 14:22:24 2021
Hostname: [redacted]
Magic: FreeBSD Kernel Dump
Version String: FreeBSD 12.2-STABLE-HBSD #0 : Tue Aug 10 20:14:33 UTC 2021
[email protected]:/usr/obj/usr/src/amd64.amd64/sys/HARDENEDBSD
Panic String: pf_free_state: timeout 0
Dump Parity: 436929362
Bounds: 0
Dump Status: good
/var/log/messages :
Sep 1 05:23:08 [redacted] syslogd: kernel boot file is /boot/kernel/kernel
Sep 1 05:23:08 [redacted] kernel: [4048] panic: pf_free_state: timeout 0
Sep 1 05:23:08 [redacted] kernel: [4048] cpuid = 2
Sep 1 05:23:08 [redacted] kernel: [4048] time = 1630473734
Sep 1 05:23:08 [redacted] kernel: [4048] __HardenedBSD_version = 1200060
__FreeBSD_version = 1202508
Sep 1 05:23:08 [redacted] kernel: [4048] version = FreeBSD 12.2-STABLE-HBSD #0
: Tue Aug 10 20:14:33 UTC 2021
Sep 1 05:23:08 [redacted] kernel: [4048]
[email protected]:/usr/obj/usr/src/amd64.amd64/sys/HARDENEDBSD
Sep 1 05:23:08 [redacted] kernel: [4048] KDB: stack backtrace:
Sep 1 05:23:08 [redacted] kernel: [4048] #0 0xffffffff80b9f12b at
kdb_backtrace+0x6b
Sep 1 05:23:08 [redacted] kernel: [4048] #1 0xffffffff80b581e0 at vpanic+0x180
Sep 1 05:23:08 [redacted] kernel: [4048] #2 0xffffffff80b57fe3 at panic+0x43
Sep 1 05:23:08 [redacted] kernel: [4048] #3 0xffffffff82923622 at
pf_free_state+0xb2
Sep 1 05:23:08 [redacted] kernel: [4048] #4 0xffffffff8292cdde at
pf_test_rule+0x312e
Sep 1 05:23:08 [redacted] kernel: [4048] #5 0xffffffff82930282 at
pf_test6+0x772
Sep 1 05:23:08 [redacted] kernel: [4048] #6 0xffffffff8293abe9 at
pf_check6_out+0x59
Sep 1 05:23:08 [redacted] kernel: [4048] #7 0xffffffff80c7095a at
pfil_run_hooks+0xaa
Sep 1 05:23:08 [redacted] kernel: [4048] #8 0xffffffff80da192f at
ip6_output+0x15af
Sep 1 05:23:08 [redacted] kernel: [4048] #9 0xffffffff80d67317 at
tcp_output+0x1d37
Sep 1 05:23:08 [redacted] kernel: [4048] #10 0xffffffff80d7acb0 at
tcp6_usr_connect+0x2f0
Sep 1 05:23:08 [redacted] kernel: [4048] #11 0xffffffff80be75fc at
soconnectat+0xdc
Sep 1 05:23:08 [redacted] kernel: [4048] #12 0xffffffff80beea8e at
kern_connectat+0xfe
Sep 1 05:23:08 [redacted] kernel: [4048] #13 0xffffffff80bee965 at
sys_connect+0x75
Sep 1 05:23:08 [redacted] kernel: [4048] #14 0xffffffff81023556 at
amd64_syscall+0x2b6
Sep 1 05:23:08 [redacted] kernel: [4048] #15 0xffffffff80ffa99e at
fast_syscall_common+0xf8
Sep 1 05:23:08 [redacted] kernel: [4048] Uptime: 1h7m28s
Sep 1 05:23:08 [redacted] kernel: [4048] Dumping 580 out of 4056
MB:..3%..12%..23%..31%..42%..53%..61%..72%..83%..91%
Sep 1 05:23:08 [redacted] kernel: [4048] Dump complete
Sep 1 05:23:08 [redacted] kernel: [4048] Automatic reboot in 15 seconds -
press a key on the console to abort
A bug has already been filled over at HardenedBSD, but the problem seems
inherent to PF's source code :
https://groups.google.com/a/hardenedbsd.org/g/users/c/rX7-zJQWnu0
It should be interesting to note that all the impacted machines use an IPv6
stack
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