Description of problem: firefox had been crashing recently for me, so I installed firefox-debuginfo, and ran: gdb /usr/lib/firefox-1.5.0.5/firefox-bin $(pidof firefox-bin) After getting to the point where I could tell gdb to continue, the system locked. Version-Release number of selected component (if applicable): gdb-6.5-3.fc6 firefox-1.5.0.5-8 firefox-debuginfo-1.5.0.5-8 kernel-2.6.17-1.2462.fc6 How reproducible: Twice so far, don't feel like trying again. :) Steps to Reproduce: 1. install firefox-debuginfo 2. launch firefox 3. gdb /usr/lib/firefox-1.5.0.5/firefox-bin $(pidof firefox-bin) Actual results: System locks. Can't even ping it. Expected results: Not that.
Probably a dup of bug 200605.
No panic, just a lock. Hitting sysrq-p, then sysrq-t, yields: ... [Thread -$BIGNUM (LWP 3349) exited] [THread -$OTHER_BIGNUM (LWP 3350) exited] BUG: write-lock lockup on CPU#0, gdb/3286, c0718a00 (Not tainted) [<c04051ea>] show_trace_log+lvl+0x54/0xfd [<c04057a6>] show_trace+0xd/0x10 [<c04058bf>] dump_stack+0x19/0x1b [<c04e5186>] _raw_write_lock+0xd4/0xf6 [<c060884a>] _write_lock_irq+0x26/0x2e [<c04260cf>] release_task+0x31/0x287 [<c04537cf>] checK-noreap+0x2f/0x63 [<c04539ab>] wake_quiescent+0x51/0xf0 [<c0453c0e>] utrace_detach+0x67/0x78 [<c042b7cb>] ptrace_detach+0x13/0x26 [<c042c81b>] ptrace_do_wait+0x282/0x28c [<c0426b31>] do_wait+0x80c/0x9ad [<c0426cf8>] sys_wait4+0x26/0x2a [<c0426d0f>] sys_waitpid+0x13/0x15 [<c0403faf>] syscall_call+0x7/0xb Apologies for any typos.
That call chain gives me a very strong idea what the problem might be. I will look for the issue I suspect.
Please try kernel-2.6.17-1.2488.fc6 and see if the problem persists there.
Works for me.