Bug 174545 – gentoo-sources-2.6.19-r5 - 8250_pnp module occasionally oops' on load

• Product: Gentoo Linux
• Status: VERIFIED TEST-REQUEST

[Description Joshua Hoblitt 2007-04-14 02:27:53 UTC]

Ironically, this is captured from the serial console:

 *   udev loading module 8250_pnp
Unable to handle kernel NULL pointer dereference at 0000000000000014 RIP: 
 [<ffffffff8028cc56>] uart_write_room+0xb/0x19
PGD 222c1e067 PUD 222c0b067 PMD 0 
Oops: 0000 [1] SMP 
CPU 3 
Modules linked in: 8250_pnp k8temp forcedeth arcmsr sg tg3 e1000 nfs lockd sunrpc raid10 raid1 raid0 dm_mirror dm_mod sata_nv libata sbp2 ohci1394 ieee1394 sl811_hcd usbhid ff_memless ohci_hcd uhci_hcd usb_storage ehci_hcd usbcore
Pid: 2906, comm: modprobe.sh Not tainted 2.6.19-gentoo-r5 #5
RIP: 0010:[<ffffffff8028cc56>]  [<ffffffff8028cc56>] uart_write_room+0xb/0x19
RSP: 0018:ffff8102232a1e50  EFLAGS: 00010202
RAX: ffff8102245d2400 RBX: 0000000000000025 RCX: ffff81012370aa10
RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff81012370a800
RBP: ffff81012370a800 R08: 0000000000000001 R09: ffff8102232a1e68
R10: 0000000000000022 R11: 0000000000000246 R12: ffff8102244b7000
R13: 0000000000000025 R14: ffff8102246eab80 R15: ffff8102244b7000
FS:  00002ab666a9cda0(0000) GS:ffff81012815f6c0(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000014 CR3: 0000000223365000 CR4: 00000000000006e0
Process modprobe.sh (pid: 2906, threadinfo ffff8102232a0000, task ffff810223302140)
Stack:  ffffffff80118982 0000000000000000 ffff810223302140 ffffffff8017aa5a
 ffff81012370aa10 ffff81012370aa10 2222222222222222 2222222222222222
 0000000000000025 0000000000000025 ffff81012370a800 0000000000000025
Call Trace:
 [<ffffffff80118982>] write_chan+0x102/0x2ff
 [<ffffffff8017aa5a>] default_wake_function+0x0/0xe
 [<ffffffff80126b14>] tty_write+0x181/0x219
 [<ffffffff80118880>] write_chan+0x0/0x2ff
 [<ffffffff8011545a>] vfs_write+0xad/0x153
 [<ffffffff80115e0e>] sys_write+0x45/0x6e
 [<ffffffff8015911e>] system_call+0x7e/0x83


Code: 8b 42 14 2b 42 10 ff c8 25 ff 0f 00 00 c3 48 8b 87 a0 02 00 
RIP  [<ffffffff8028cc56>] uart_write_room+0xb/0x19
 RSP <ffff8102232a1e50>
CR2: 0000000000000014
 <6>eth0: forcedeth.c: subsystem: 010de:cb84 bound to 0000:00:08.0
ACPI: PCI Interrupt Link [LMAD] enabled at IRQ 21
ACPI: PCI Interrupt 0000:00:09.0[A] -> Link [LMAD] -> GSI 21 (level, low) -> IRQ 21
PCI: Setting latency timer of device 0000:00:09.0 to 64
forcedeth: using HIGHDMA
eth1: forcedeth.c: subsystem: 010de:cb84 bound to 0000:00:09.0


The system is hosed (and remote) at the moment but I can provide the .config if need be (just not right now)

Reproducible: Always

[Comment 1 Joshua Hoblitt 2007-04-14 02:32:33 UTC]

Created attachment 116213 [details]
output of lspci -v

[Comment 2 Joshua Hoblitt 2007-04-14 02:33:06 UTC]

The motherboard is a Tyan S2927 running BIOS v1.04.

[Comment 3 Jakub Moc (RETIRED) 2007-04-14 06:49:47 UTC]

Still a problem w/ 2.6.20-r5?

[Comment 4 Joshua Hoblitt 2007-07-19 00:20:22 UTC]

This issue is resolved with the serial console changes in 2.6.22.