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um: Always dump trace for specified task in show_stack

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[ Upstream commit 0f659ff362eac69777c4c191b7e5ccb19d76c67d ]

Currently, show_stack() always dumps the trace of the current task.
However, it should dump the trace of the specified task if one is
provided. Otherwise, things like running "echo t > sysrq-trigger"
won't work as expected.

Fixes: 970e51feaddb ("um: Add support for CONFIG_STACKTRACE")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20241106103933.1132365-1-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tiwei Bie 2024-11-06 18:39:33 +08:00 committed by Greg Kroah-Hartman
parent a6294d6010
commit fcf32ea819
1 changed files with 1 additions and 1 deletions
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2
arch/um/kernel/sysrq.c
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@ -52,5 +52,5 @@ void show_stack(struct task_struct *task, unsigned long *stack,
}
printk("%sCall Trace:\n", loglvl);
dump_trace(current, &stackops, (void *)loglvl);
dump_trace(task ?: current, &stackops, (void *)loglvl);
}