um: Don't use vfprintf() for os_info()

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[ Upstream commit 236f9fe39b ]

The threads allocated inside the kernel have only a single page of
stack. Unfortunately, the vfprintf function in standard glibc may use
too much stack-space, overflowing it.

To make os_info safe to be used by helper threads, use the kernel
vscnprintf function into a smallish buffer and write out the information
to stderr.

Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Benjamin Berg 2023-11-10 12:03:41 +01:00 • committed by Greg Kroah-Hartman

parent a95e52af36

commit d8264ce2f8

1 changed files with 17 additions and 2 deletions

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arch/um/os-Linux/util.c

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