Date: Mon, 04 Feb 2019 12:51:49 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 235489] llan driver causes fatal kernel trap: 0x300 (data storage interrupt) when system is low on memory Message-ID: <bug-235489-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235489 Bug ID: 235489 Summary: llan driver causes fatal kernel trap: 0x300 (data storage interrupt) when system is low on memory Product: Base System Version: CURRENT Hardware: powerpc OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: luporl@FreeBSD.org When running several builders in parallel, on QEMU, with 8GB of memory, a fatal kernel trap caused by llan driver is sometimes observed, when the system starts to run out of swap space. fatal kernel trap: exception = 0x300 (data storage interrupt) virtual address = 0x18 dsisr = 0x42000000 srr0 = 0xc000000000ac9104 (0xac9104) srr1 = 0x8000000000009032 current msr = 0x8000000000009032 lr = 0xc000000000ac90ec (0xac90ec) curthread = 0xc000000006deb000 pid = 12, comm = irq16781321: llan0 panic: data storage interrupt trap cpuid = 2 time = 1549288422 KDB: stack backtrace: 0xe0000000005a5ed0: at .kdb_backtrace+0x5c 0xe0000000005a6000: at .vpanic+0x1b4 0xe0000000005a60c0: at .panic+0x38 0xe0000000005a6150: at .trap_fatal+0x25c 0xe0000000005a61e0: at .trap+0xeec 0xe0000000005a6380: at .powerpc_interrupt+0x290 0xe0000000005a6420: kernel DSI write trap @ 0x18 by .llan_intr+0xf4: srr1=0x8000000000009032 r1=0xe0000000005a66d0 cr=0x22000042 xer=0 ctr=0 r2=0xc000000001569528 sr=0x42000000 0xe0000000005a66d0: at .llan_intr+0xd8 0xe0000000005a6770: at .ithread_loop+0x25c 0xe0000000005a6850: at .fork_exit+0xd0 0xe0000000005a68f0: at .fork_trampoline+0x10 0xe0000000005a6920: at -0x4 KDB: enter: panic [ thread pid 12 tid 100153 ] Stopped at .kdb_enter+0x60: ld r2, r1, 0x28 db> It seems like there is some point in the driver that does not check properly if UMA allocation failed. -- You are receiving this mail because: You are the assignee for the bug.help
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