Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Adrian Hunter b54962dc4e perf: Prevent passing zero nr_pages to rb_alloc_aux() ... [ Upstream commit dbc48c8f41c208082cfa95e973560134489e3309 ] nr_pages is unsigned long but gets passed to rb_alloc_aux() as an int, and is stored as an int. Only power-of-2 values are accepted, so if nr_pages is a 64_bit value, it will be passed to rb_alloc_aux() as zero. That is not ideal because: 1. the value is incorrect 2. rb_alloc_aux() is at risk of misbehaving, although it manages to return -ENOMEM in that case, it is a result of passing zero to get_order() even though the get_order() result is documented to be undefined in that case. Fix by simply validating the maximum supported value in the first place. Use -ENOMEM error code for consistency with the current error code that is returned in that case. Fixes: 45bfb2e504 ("perf: Add AUX area to ring buffer for raw data streams") Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20240624201101.60186-6-adrian.hunter@intel.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-19 05:33:29 +02:00
..
callchain.c
core.c	perf: Prevent passing zero nr_pages to rb_alloc_aux()	2024-08-19 05:33:29 +02:00
hw_breakpoint.c
internal.h	perf: Fix perf_aux_size() for greater-than 32-bit size	2024-08-19 05:33:29 +02:00
Makefile
ring_buffer.c	perf/core: Add a new read format to get a number of lost samples	2023-12-13 18:18:15 +01:00
uprobes.c