Date: Thu, 05 Mar 2026 08:10:03 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293382] Dead lock and kernel crash around closefp_impl Message-ID: <bug-293382-227-aa0w6oOKwE@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-293382-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293382 --- Comment #6 from Paul <devgs@ukr.net> --- Finally caught another crash. Alas I was a bit busy at the time and only reporting back now. The bad thing is: somehow it did not produce the /var/crash/vmcore.1. After the reboot it has spitted out: Starting syslogd. savecore 1735 - - reboot after panic: general protection fault Mar 3 12:14:25 frv21 savecore[1735]: reboot after panic: general protection fault savecore 1735 - - writing core to /var/crash/textdump.tar.1 Writing crash summary to /var/crash/core.txt.1. Starting chronyd. but... $ cat core.txt.1 /var/crash/vmcore.1 not found Available files are: config.txt core.txt.1 ddb.txt msgbuf.txt panic.txt textdump.tar.1 Last messages: $ tail -n 50 msgbuf.txt <5>Limiting tcp reset response from 67253 to 49997 packets/sec <5>Limiting tcp reset response from 67169 to 49995 packets/sec <5>Limiting tcp reset response from 65293 to 49993 packets/sec <5>Limiting tcp reset response from 64794 to 50015 packets/sec <5>Limiting tcp reset response from 65880 to 50012 packets/sec <5>Limiting tcp reset response from 65243 to 50000 packets/sec <5>Limiting tcp reset response from 71695 to 49993 packets/sec <5>Limiting tcp reset response from 79815 to 49998 packets/sec <5>Limiting tcp reset response from 71724 to 49997 packets/sec <5>Limiting tcp reset response from 67537 to 50005 packets/sec <5>Limiting tcp reset response from 65417 to 50000 packets/sec <5>Limiting tcp reset response from 75635 to 50009 packets/sec <5>Limiting tcp reset response from 71016 to 50005 packets/sec <5>Limiting tcp reset response from 78743 to 49986 packets/sec <4>TCP syncache overflow detected; using syncookies for the next 15 seconds <118>Mar 3 00:40:02 frv21 kernel: TCP syncache overflow detected; using syncookies for the next 15 seconds Fatal trap 9: general protection fault while in kernel mode cpuid = 3; apic id = 03 instruction pointer = 0x20:0xffffffff80b590fd stack pointer = 0x28:0xfffffe07e5854d70 frame pointer = 0x28:0xfffffe07e5854d70 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 86706 (<redacted-3>) rdi: deadc0dedeadc0f6 rsi: 0000000000000004 rdx: ffffffff811ab239 rcx: 0000000000000122 r8: 0000000000000001 r9: ffffffff81e1cba8 rax: fffff801be6b4000 rbx: 00000000000774c3 rbp: fffffe07e5854d70 r10: 0000000000000000 r11: 0000000000000004 r12: fffff8010bbfa418 r13: fffff84f0bab13c0 r14: 00000000000774c3 r15: fffff8010bbfa400 trap number = 9 panic: general protection fault cpuid = 3 time = 1772532522 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe07e5854af0 vpanic() at vpanic+0x161/frame 0xfffffe07e5854c20 panic() at panic+0x43/frame 0xfffffe07e5854c80 trap_fatal() at trap_fatal+0x68/frame 0xfffffe07e5854ca0 calltrap() at calltrap+0x8/frame 0xfffffe07e5854ca0 --- trap 0x9, rip = 0xffffffff80b590fd, rsp = 0xfffffe07e5854d70, rbp = 0xfffffe07e5854d70 --- __mtx_assert() at __mtx_assert+0x3d/frame 0xfffffe07e5854d70 knote_fdclose() at knote_fdclose+0x12e/frame 0xfffffe07e5854dc0 closefp_impl() at closefp_impl+0x96/frame 0xfffffe07e5854e00 amd64_syscall() at amd64_syscall+0x15a/frame 0xfffffe07e5854f30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe07e5854f30 --- syscall (6, FreeBSD ELF64, close), rip = 0x82d3ea32a, rsp = 0x860151bb8, rbp = 0x860151bd0 --- Crash point still looks the same. We aren't sure why there is no core dump. Have we configured/built the kernel improperly? But, the last time, only one of the two crashes have produced it. Seems like it chance related and we have to keep trying? -- You are receiving this mail because: You are the assignee for the bug.home | help
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