Messages in this thread | | | Date | 18 Feb 2011 00:03:21 -0500 | From | "George Spelvin" <> | Subject | 2.6.38-rc5 tcp_connect oops: EIP = 0x0 |
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But wonder of wonders, kernel mode switching worked so I got to see the oops on the text-mode console. It happened just as I tried to ssh out.
It's a Core 2 duo laptop (Dell E1405), 2 GB RAM, running a 32-bit kernel. It's worth noting that I was using wired internet (b44 driver) and not wireless.
I've been having a lot of weird lockups with 2.6.38-rcX, quite a change from the very stable 2.6.36, but this is the first time I booted -rc5. Also, the symptoms are very different; before the lockup did not seen correlated with any particular activity, but the "lockup" was more like something getting wedged in the kernel that more and more tasks would get stuck on until everything stopped responding.
I should mention that this is transcribed by hand from the screen. Oh, and also, it is far from the first time I ran ssh this boot. (I re-tested it ater rebooting, just to be sure. Not a consistent crash.)
Anyway, jumping to address 0 looks "interesting", so it seems worth reporting.
BUG: unable to handle kernel NULL pointer dereference at (null) IP: [< (null)>] (null) *pde = 00000000 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/uevent Modules linked in: rfcomm btusb sco l2cap crc16 bluetooth b43 mac80211 cfg80211 [last unloaded: sha256_generic]
Pid: 12178, comm: ssh Not tainted 2.6.38-rc5 #227 Dell Inc. MXC061 /0MG532 EIP: 0060:[<00000000>] EFLAGS: 0021246 CPU: 0 EIP is at 0x0 EAX: f5947e00 EBX: f5982f80 ECX: 00000024 EDX: c148fe00 ESI: f5947e00 EDI: ebf29e54 EBP: ebf29ee0 ESP: ebf29dd0 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process ssh (pid: 12178, ti=ebf28000 task=ebefc6c0 task.ti = ebef28000) Stack: c12c83ea 07e2427d 02000000 7b018f79 c117b827 0b996609 7b018f79 5f5f6644 f5982f80 00000000 ebf29e58 ebf29ee0 c12cc0e0 00001600 00000000 00000001 03641600 00000000 00000000 00000000 00000000 036423c0 3e6423c0 00000000 Call Trace: [<c12c83ea>] ? tcp_connect+0xdd/0x3fd [<c117b827>] ? secure_tcp_sequence_number+0x4f/0x65 [<c12cc0e0>] ? tcp_v4_connect+0x3c1/0x417 [<c12d6726>] ? inet_stream_connect+0x88/0x1fc [<c1110705>] ? _copy_from_user+0x2b/0x10e [<c129307d>] ? sys_connect+0x70/0x98 [<c108df0f>] ? get_empty_filp+0x9f/0x121 [<c108dfa0>] ? alloc_file+0xf/0x85 [<c1293287>] ? sock_alloc_file+0x97/0xeb [<c108b758>] ? fd_install+0x1b/0x38 [<c12932f6>] ? sock_map_fd+0x1b/0x20 [<c1293bdf>] ? sys_socketcall+0x9d/0x291 [<c1002750>] ? sysenter_do_call+0x12/0x26 Code: Bad EIP value EIP: [<00000000>] 0x0 SS:ESP 0068:ebf29dd0 CR2: 0000000000000000
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