softlockup issue - Githubissues

varun2784 commented 9 years ago

Process kedr_lc0 (pid: 23851, threadinfo ffff881041142000, task ffff8810577b2040) Stack: ffff881041143fd8 ffffe8f7a8a14480 ffffe8f7a8a14480 ffffffffa0357560

ffff881041143fd8 ffffe8f7a8a14488 ffff881041143ee0 ffffffff81098090 000012bf3443bb6f 0000000000000000 ffff881041143e60 ffff8810577b26b8 Call Trace: [] ? work_func_free+0x0/0x1d0 [kedr_leak_check] [] ? worker_thread+0x170/0x2a0 [] ? autoremove_wake_function+0x0/0x40 [] ? worker_thread+0x0/0x2a0 [] ? kthread+0x9e/0xc0 [] ? child_rip+0xa/0x20 [] ? kthread+0x0/0xc0 [] ? child_rip+0x0/0x20 Code: 01 f8 48 c1 e2 39 48 29 f0 48 01 c8 48 29 d0 48 89 da 48 c1 e2 3f 48 01 d0 48 c1 e8 36 49 8b 7c c5 38 48 85 ff 74 16 48 3b 5f 10 <48> 8b 07 0f 84 cc 00 00 00 48 85 c0 0f 85 bb 00 00 00 41 8b 85 Call Trace: [] ? work_func_free+0x0/0x1d0 [kedr_leak_check] [] ? worker_thread+0x170/0x2a0 [] ? autoremove_wake_function+0x0/0x40 [] ? worker_thread+0x0/0x2a0 [] ? kthread+0x9e/0xc0 [] ? child_rip+0xa/0x20 [] ? kthread+0x0/0xc0 [] ? child_rip+0x0/0x20 Bridge firewalling registered

euspectre commented 9 years ago

What kind of Linux is that?
Which kernel version is used?
Which operations were you doing with KEDR before the problem happened? Which kernel modules were being analyzed then?
Did the problem show up only once or, perhaps, it can be reproduced reliably?

varun2784 commented 9 years ago

Sorry to get you so late. I was running centos 6.7(2.6.32-573). I was running a proprietary kernel module and was doing some testing with it.

Tsyvarev commented 9 years ago

Rather strange: work_func_free doesn't use any locking, so shouldn't prevent other processes to be executed.

euspectre commented 8 years ago

Kernel 2.6.32 is no longer supported by KEDR. If the problem is still reproducible with kernel 3.2 or newer (or, better, 3.10 or newer), please open another bug report here.

euspectre / kedr

softlockup issue #25