Date: Sun, 03 May 2026 17:18:04 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 294984] Kernel panic in udp6_send when underlying interface disappears Message-ID: <bug-294984-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294984 Bug ID: 294984 Summary: Kernel panic in udp6_send when underlying interface disappears Product: Base System Version: 15.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: stephan@lichtenauer.co.za When restarting netif, I can reproduce a kernel panic that seems to be related to the underlying network interface disappearing according to bz@ (see discussion in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279717): Below is what it prints before it writes the dump (please note below is iOS picture text recognition which I tried to manually correct, but if something doesn't make any sense it might be my mistake). I also have a crash dump in /var/crash which I could provide. <<< Fatal trap 12: page fault while in kernel mode cpuid = 12; apic id = 0c fault virtual address = 0x10 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff80d8e305 stack pointer = 0x28:0xfffffe0250efda10 frame pointer = 0x28:0xfffffe0250efda40 code segment = base Øxø, limit Oxfffff, type @x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 4804 (pool-2387) rdi: fffff80017747000 rsi: 000000000000001c rdx: fffff80b45542278 rcx: fffff80017747000 r8: fffffe0250efd9c0 r9: 0000000000000018 rax: 0000000000000000 rbx: 0000000000000000 rbp: fffffe0250efda40 r10: 0000001000000000 r11: fffff8027d498260 r12: fffff8011869fc94 r13: fffff8011869fc00 r14: fffffe0250efda1c r15: fffff80666969380 trap number = 12 panic: page fault cpuid = 12 time = 1777799864 KDB: stack backtrace: #0 Uxffffffff80bbelad at kdb_backtrace+0x5d #1 0xffffffff80b71536 at vpanic+0x136 #2 0xffffffff80b713f3 at panic+0x43 #3 0xffffffff81079fa9 at trap_pfault+0x3c9 #4 0xffffffff81050028 at calltrap+0x8 #5 0xffffffff80dabd1a at udp6_send+0x69a #6 0xffffffff80c18bcc at sosend_dgram+0x2fc #7 0xffffffff80c19b7f at sousrsend+0x5f #8 0xffffffff80c21b70 at kern_sendit+0x1c0 #9 0xffffffff80c21e98 at sendit+0x1a8 #10 0xffffffff80c21cdd at sys_sendto+0x4d #11 0xffffffff8107a8e6 at amd64_syscal1+0x126 #12 0xffffffff8105091b at fast_syscall_common+0xf8 >>> -- You are receiving this mail because: You are the assignee for the bug.home | help
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