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| Started by | Aapo Vienamo <avienamo@nvidia.com> |
|---|---|
| First post | 2015-08-05 18:00 +0200 |
| Last post | 2015-08-05 18:00 +0200 |
| Articles | 1 — 1 participant |
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[BUG] arm: kgdb: patch_text() in kgdb_arch_set_breakpoint() may sleep Aapo Vienamo <avienamo@nvidia.com> - 2015-08-05 18:00 +0200
| From | Aapo Vienamo <avienamo@nvidia.com> |
|---|---|
| Date | 2015-08-05 18:00 +0200 |
| Subject | [BUG] arm: kgdb: patch_text() in kgdb_arch_set_breakpoint() may sleep |
| Message-ID | <pU9gL-5S2-35@gated-at.bofh.it> |
Hi, The breakpoint setting code in arch/arm/kernel/kgdb.c calls patch_text(), which ends up trying to sleep while in interrupt context. The bug was introduced by commit: 23a4e40 arm: kgdb: Handle read-only text / modules. The resulting behavior is "BUG: scheduling while atomic..." when setting a breakpoint in kgdb. This was tested on an Nvidia Jetson TK1 board with 4.2.0-rc5-next-20150805 kernel. Regards, Aapo Vienamo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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