On Wed, Feb 03, 2021 at 02:41:53PM -0800, Ivan Babrou wrote: > On Wed, Feb 3, 2021 at 11:05 AM Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > > > > On Wed, Feb 03, 2021 at 09:46:55AM -0800, Ivan Babrou wrote: > > > > Can you pretty please not line-wrap console output? It's unreadable. > > > > > > GMail doesn't make it easy, I'll send a link to a pastebin next time. > > > Let me know if you'd like me to regenerate the decoded stack. > > > > > > > > edfd9b7838ba5e47f19ad8466d0565aba5c59bf0 is the first bad commit > > > > > commit edfd9b7838ba5e47f19ad8466d0565aba5c59bf0 > > > > > > > > Not sure what tree you're on, but that's not the upstream commit. > > > > > > I mentioned that it's a rebased core-static_call-2020-10-12 tag and > > > added a link to the upstream hash right below. > > > > > > > > Author: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> > > > > > Date: Tue Aug 18 15:57:52 2020 +0200 > > > > > > > > > > tracepoint: Optimize using static_call() > > > > > > > > > > > > > There's a known issue with that patch, can you try: > > > > > > > > http://lkml.kernel.org/r/20210202220121.435051654@xxxxxxxxxxx > > > > > > I've tried it on top of core-static_call-2020-10-12 tag rebased on top > > > of v5.9 (to make it reproducible), and the patch did not help. Do I > > > need to apply the whole series or something else? > > > > Can you recreate with this patch, and add "unwind_debug" to the cmdline? > > It will spit out a bunch of stack data. > > Here's the three I'm building: > > * https://github.com/bobrik/linux/tree/ivan/static-call-5.9 > > It contains: > > * v5.9 tag as the base > * static_call-2020-10-12 tag > * dm-crypt patches to reproduce the issue with KASAN > * x86/unwind: Add 'unwind_debug' cmdline option > * tracepoint: Fix race between tracing and removing tracepoint > > The very same issue can be reproduced on 5.10.11 with no patches, > but I'm going with 5.9, since it boils down to static call changes. > > Here's the decoded stack from the kernel with unwind debug enabled: > > * https://gist.github.com/bobrik/ed052ac0ae44c880f3170299ad4af56b > > See my first email for the exact commands that trigger this. Thanks. Do you happen to have the original dmesg, before running it through the post-processing script? I assume you're using decode_stacktrace.sh? It could use some improvement, it's stripping the function offset. Also spaces are getting inserted in odd places, messing the alignment. [ 137.291837][ C0] ffff88809c409858: d7c4f3ce817a1700 (0xd7c4f3ce817a1700) [ 137.291837][ C0] ffff88809c409860: 0000000000000000 (0x0) [ 137.291839][ C0] ffff88809c409868: 00000000ffffffff (0xffffffff) [ 137.291841][ C0] ffff88809c409870: ffffffffa4f01a52 unwind_next_frame (arch/x86/kernel/unwind_orc.c:380 arch/x86/kernel/unwind_orc.c:553) [ 137.291843][ C0] ffff88809c409878: ffffffffa4f01a52 unwind_next_frame (arch/x86/kernel/unwind_orc.c:380 arch/x86/kernel/unwind_orc.c:553) [ 137.291844][ C0] ffff88809c409880: ffff88809c409ac8 (0xffff88809c409ac8) [ 137.291845][ C0] ffff88809c409888: 0000000000000086 (0x86) -- Josh
