Messages in this thread | | | Subject | kernel BUG at kernel/kallsyms.c:222! | From | Axel Lin <> | Date | Thu, 07 Nov 2013 09:53:28 +0800 |
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Hi, I got below oops while debugging a sd controller driver:
[ 4.032026] ------------[ cut here ]------------ [ 4.036730] kernel BUG at kernel/kallsyms.c:222! [ 4.041501] Internal error: Oops - BUG: 0 [#1] ARM [ 4.046847] CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 3.12.0-00061-g0835d93-dirty #1657
I can avoid the oops by either revert commit f6537f2f0eba4eba "scripts/kallsyms: filter symbols not in kernel address space", or comment out below line in drivers/mmc/core/sdio.c. dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
The f->vendor_fixup points to add_quirk_for_sdio_devices. It looks like the symbol add_quirk_for_sdio_devices is missing.
So I revert commit f6537f2f and check /proc/kallsyms: ~ # grep add_quirk_for_sdio_devices /proc/kallsyms 00157bf8 t add_quirk_for_sdio_devices
If I don't revert commit f6537f2f and just comment out above dev_dbg line, Checking /proc/kallsyms then I got: ~ # grep add_quirk_for_sdio_devices /proc/kallsyms [sched_delayed] sched: RT throttling activated BUG: soft lockup - CPU#0 stuck for 21s! [grep:59]
CPU: 0 PID: 59 Comm: grep Not tainted 3.12.0-00061-g0835d93-dirty #1675 task: 01d36320 ti: 008be000 task.ti: 008be000
BTW, I'm testing it on a noMMU platform (arm7tdmi).
Regards, Axel
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