linux/fs/tracefs
Erick Archer 1057066009 eventfs: Use kcalloc() instead of kzalloc()
As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.

So, use the purpose specific kcalloc() function instead of the argument
size * count in the kzalloc() function.

[1] https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments

Link: https://lore.kernel.org/linux-trace-kernel/20240115181658.4562-1-erick.archer@gmx.com

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Link: https://github.com/KSPP/linux/issues/162
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-01-16 17:52:33 -05:00
..
event_inode.c eventfs: Use kcalloc() instead of kzalloc() 2024-01-16 17:52:33 -05:00
inode.c tracefs/eventfs: Use root and instance inodes as default ownership 2024-01-03 21:53:55 -05:00
internal.h tracefs/eventfs: Use root and instance inodes as default ownership 2024-01-03 21:53:55 -05:00
Makefile eventfs: Implement eventfs dir creation functions 2023-07-30 18:13:33 -04:00