Tomas reports that mptsas can crash if probe is interrupted by a signal: Tomas Cernaj <tcernaj@xxxxxx> wrote: > Dear Maintainer, > > after upgrading from linux-image-3.12 to 3.13, systemd-udevd kills the mptsas > module initialization during boot after 30 seconds while probing the SAS > hardware. As a consequence the system can't be booted. Kernel output is > attached as precision-boot.log. > > I increased systemd's timeout to 45 seconds by adding "udevadm control > --timeout=45" directly after the daemon start in /usr/share/initramfs- > tools/scripts/init-top/udev and regenerating the initrd. This resulted in the > kernel failing to load the mptsas module completely, but it could be loaded > manually from the initramfs shell. The kernel output is attached in > dmesg_manual-load-mptsas-with-udev-timeout-45s.log. > > I have a LSI SAS1068E controller with two SAS disks as RAID-0. The mptsas > driver normally takes about 30 seconds to initialize. > > Kernel output follows. (Note: in this instance I manually added mptsas to /etc > /initramfs-tools/modules, but the behavior was the same without this entry. > Also different from the normal boot is netconsole to capture the kernel > output.) Quoting part of that log (full logs are at <https://bugs.debian.org/741686>): > [ 32.392600] systemd-udevd[95]: timeout: killing '/sbin/modprobe -b pci:v00001000d00000058sv00001028sd00001F0Ebc01sc00i00' [204] > [ 33.419390] systemd-udevd[95]: timeout: killing '/sbin/modprobe -b pci:v00001000d00000058sv00001028sd00001F0Ebc01sc00i00' [204] > [ 33.422860] systemd-udevd[92]: worker [95] /devices/pci0000:20/0000:20:09.0/0000:23:00.0 timeout; kill it > [ 33.422867] systemd-udevd[92]: seq 688 '/devices/pci0000:20/0000:20:09.0/0000:23:00.0' killed > [ 33.473577] systemd-udevd[92]: worker [95] terminated by signal 9 (Killed) > [ 33.488028] netpoll: netconsole: local port 6665 > [ 33.501909] netpoll: netconsole: local IPv4 address 192.168.1.20 > [ 33.516006] netpoll: netconsole: interface 'eth0' > [ 33.530072] netpoll: netconsole: remote port 6666 > [ 33.544275] netpoll: netconsole: remote IPv4 address 192.168.1.128 > [ 33.558569] netpoll: netconsole: remote ethernet address ff:ff:ff:ff:ff:ff > [ 33.572813] netpoll: netconsole: device eth0 not up yet, forcing it > [ 33.586981] tg3 0000:06:00.0: irq 91 for MSI/MSI-X > [ 33.683276] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready > [ 34.091924] scsi6: error handler thread failed to spawn, error = -12 > [ 34.105904] mptsas: ioc0: WARNING - Unable to register controller with SCSI subsystem > [ 34.120160] BUG: unable to handle kernel NULL pointer dereference at 0000000000000060 > [ 34.134430] IP: [<ffffffff814a5099>] mutex_lock+0x9/0x25 > [ 34.148658] PGD 0 > [ 34.162680] Oops: 0002 [#1] SMP > [ 34.176706] Modules linked in: netconsole(+) configfs sg sr_mod cdrom hid_generic usbhid hid mptsas(+) tg3 ahci scsi_transport_sas ptp mptscsih libahci uhci_hcd ehci_pci libata mptbase ehci_hcd pps_core libphy scsi_mod usbcore usb_common > [ 34.207141] CPU: 0 PID: 204 Comm: modprobe Tainted: G I 3.13-1-amd64 #1 Debian 3.13.5-1 > [ 34.222620] Hardware name: Dell Inc. Precision WorkStation T5500 /0D883F, BIOS A05 04/12/2010 > [ 34.238232] task: ffff880312060010 ti: ffff880312126000 task.ti: ffff880312126000 > [ 34.253972] RIP: 0010:[<ffffffff814a5099>] [<ffffffff814a5099>] mutex_lock+0x9/0x25 > [ 34.270077] RSP: 0018:ffff880312127ba8 EFLAGS: 00010246 > [ 34.286124] RAX: 0000000000000000 RBX: 0000000000000060 RCX: 0000000000001464 > [ 34.302018] RDX: 0000000000001464 RSI: 0000000000000046 RDI: 0000000000000060 > [ 34.317456] RBP: 0000000000000060 R08: 0000000000000000 R09: 0000000000000312 > [ 34.332672] R10: 000000000000000f R11: 0000000007070707 R12: ffff880316372000 > [ 34.347735] R13: ffff880316372098 R14: ffffffffa014a3f0 R15: 0000000000000001 > [ 34.362525] FS: 00007fed06cf3700(0000) GS:ffff880323200000(0000) knlGS:0000000000000000 > [ 34.377141] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [ 34.391580] CR2: 0000000000000060 CR3: 000000031202a000 CR4: 00000000000007f0 > [ 34.406043] Stack: > [ 34.420328] 0000000000000000 ffffffffa019f4f3 0000000000000000 ffff880316051000 > [ 34.435163] ffff880316372000 ffffffffa009c215 ffff880316051000 00000000ffffffff > [ 34.449977] ffff880316372000 ffffffffa0146fa8 ffff880316372000 0000000000000000 > [ 34.464604] Call Trace: > [ 34.479035] [<ffffffffa019f4f3>] ? scsi_remove_host+0x13/0x100 [scsi_mod] > [ 34.493578] [<ffffffffa009c215>] ? mptscsih_remove+0x25/0x80 [mptscsih] > [ 34.507795] [<ffffffffa0146fa8>] ? mptsas_probe+0x398/0x4a0 [mptsas] > [ 34.521684] [<ffffffff812a0e8a>] ? local_pci_probe+0x3a/0xa0 > [ 34.535584] [<ffffffff812a219a>] ? pci_device_probe+0xca/0x120 > [ 34.549436] [<ffffffff81354c78>] ? driver_probe_device+0x68/0x220 > [ 34.562960] [<ffffffff81354eeb>] ? __driver_attach+0x7b/0x80 > [ 34.576082] [<ffffffff81354e70>] ? __device_attach+0x40/0x40 > [ 34.588726] [<ffffffff81353033>] ? bus_for_each_dev+0x53/0x90 > [ 34.600982] [<ffffffff81354430>] ? bus_add_driver+0x170/0x220 > [ 34.612910] [<ffffffffa014d000>] ? 0xffffffffa014cfff > [ 34.624691] [<ffffffff81355486>] ? driver_register+0x56/0xd0 > [ 34.636367] [<ffffffffa014d000>] ? 0xffffffffa014cfff > [ 34.647907] [<ffffffffa014d11a>] ? mptsas_init+0x11a/0x1000 [mptsas] > [ 34.659558] [<ffffffff81002162>] ? do_one_initcall+0x112/0x170 > [ 34.671205] [<ffffffff810c6937>] ? load_module+0x1b07/0x23f0 > [ 34.682908] [<ffffffff810c3530>] ? m_show+0x1c0/0x1c0 > [ 34.694597] [<ffffffff810c734d>] ? SyS_finit_module+0x6d/0x70 > [ 34.706285] [<ffffffff814adb39>] ? system_call_fastpath+0x16/0x1b > [ 34.718018] Code: 00 00 48 89 e6 4c 89 f7 e8 35 56 bf ff e9 40 ff ff ff b8 01 00 00 00 e9 87 fe ff ff 66 0f 1f 44 00 00 53 48 89 fb e8 57 e4 ff ff <f0> ff 0b 79 08 48 89 df e8 3a fe ff ff 65 48 8b 04 25 40 c8 00 > [ 34.742873] RIP [<ffffffff814a5099>] mutex_lock+0x9/0x25 > [ 34.754928] RSP <ffff880312127ba8> > [ 34.766735] CR2: 0000000000000060 > [ 34.778493] ---[ end trace 7cf83da47bb3f354 ]--- -- Ben Hutchings When you say `I wrote a program that crashed Windows', people just stare ... and say `Hey, I got those with the system, *for free*'. - Linus Torvalds
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