Messages in this thread | | | Date | Mon, 19 Mar 2007 18:30:13 +0300 | From | Alexey Dobriyan <> | Subject | Oops after cd /sys/.../cpufreq/; rmmod; cat stats/time_in_state |
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Steps to reproduce:
# modprobe p4-clockmod $ cd /sys/devices/system/cpu/cpu0/cpufreq/ # rmmod p4-clockmod $ cat stats/time_in_state Segmentation fault
p4-clockmod: P4/Xeon(TM) CPU On-Demand Clock Modulation available BUG: unable to handle kernel paging request at virtual address 6b6b6b6f printing eip: c01906b4 *pde = 00000000 Oops: 0000 [#1] PREEMPT Modules linked in: speedstep_lib ohci_hcd af_packet e1000 ehci_hcd uhci_hcd usbcore xfs CPU: 0 EIP: 0060:[<c01906b4>] Not tainted VLI EFLAGS: 00010202 (2.6.21-rc4-5851fadce8824d5d4b8fd02c22ae098401f6489e #2) EIP is at sysfs_open_file+0xd3/0x259 eax: 6b6b6b6b ebx: 00000000 ecx: f371b000 edx: 00000000 esi: c03a7330 edi: f35c8408 ebp: f371c9b0 esp: f371bee0 ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068 Process cat (pid: 6876, ti=f371b000 task=c192f550 task.ti=f371b000) Stack: f3713b2c c0393400 00000000 f371c9b0 00000000 f3713b2c c01905e1 c0158575 c18d3208 f71c4cd8 00000000 f371c9b0 00008000 f371bf38 ffffff9c c0158702 f371c9b0 00000000 00000000 c0158744 00000000 f371bf38 f71c4cd8 c18d3208 Call Trace: [<c01905e1>] sysfs_open_file+0x0/0x259 [<c0158575>] __dentry_open+0xec/0x1ec [<c0158702>] nameidata_to_filp+0x31/0x3a [<c0158744>] do_filp_open+0x39/0x40 [<c0158478>] get_unused_fd+0xa1/0xb2 [<c02d4cde>] _spin_unlock+0x25/0x3b [<c0158478>] get_unused_fd+0xa1/0xb2 [<c0158785>] do_sys_open+0x3a/0x6d [<c01587f3>] sys_open+0x1c/0x20 [<c0103e72>] sysenter_past_esp+0x5f/0x99 ======================= Code: 00 f0 ff ff 8b 40 08 a8 08 0f 85 95 01 00 00 bb ed ff ff ff 8b 44 24 08 85 c0 0f 84 f8 00 00 00 8b 47 28 85 c0 0f 84 34 01 00 00 <8b> 40 04 85 c0 0f 84 29 01 00 00 8b 58 04 85 db 0f 84 0f 01 00 EIP: [<c01906b4>] sysfs_open_file+0xd3/0x259 SS:ESP 0068:f371bee0 Slab corruption: start=f35c83bc, len=256 Redzone: 0x5a2cf071/0x5a2cf071. Last user: [<c0181d54>](load_elf_binary+0x161b/0x1ac7) 060: 6b 6b 6b 6b 6c 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b Prev obj: start=f35c82b0, len=256 Redzone: 0x170fc2a5/0x170fc2a5. Last user: [<c0180758>](load_elf_binary+0x1f/0x1ac7) 000: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 010: 02 00 03 00 01 00 00 00 b0 85 04 08 34 00 00 00 Next obj: start=f35c84c8, len=256 Redzone: 0x170fc2a5/0x170fc2a5. Last user: [<c01807ea>](load_elf_binary+0xb1/0x1ac7) 000: 06 00 00 00 34 00 00 00 34 80 04 08 34 80 04 08 010: 00 01 00 00 00 01 00 00 05 00 00 00 04 00 00 00
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