Steven Rostedt (Google) 24f5bb9f24 tracing: Just use strcmp() for testing __string() and __assign_str() match ... As __assign_str() no longer uses its "src" parameter, there's a check to make sure nothing depends on it being different than what was passed to __string(). It originally just compared the pointer passed to __string() with the pointer passed into __assign_str() via the "src" parameter. But there's a couple of outliers that just pass in a quoted string constant, where comparing the pointers is UB to the compiler, as the compiler is free to create multiple copies of the same string constant. Instead, just use strcmp(). It may slow down the trace event, but this will eventually be removed. Also, fix the issue of passing NULL to strcmp() by adding a WARN_ON() to make sure that both "src" and the pointer saved in __string() are either both NULL or have content, and then checking if "src" is not NULL before performing the strcmp(). Link: https://lore.kernel.org/all/CAHk-=wjxX16kWd=uxG5wzqt=aXoYDf1BgWOKk+qVmAO0zh7sjA@mail.gmail.com/ Fixes: b1afefa62c ("tracing: Use strcmp() in __assign_str() WARN_ON() check") Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2024-03-19 11:23:30 -07:00
..
events	Tracing updates for 6.9:	2024-03-18 15:11:44 -07:00
misc	NFS client updates for Linux 6.9	2024-03-16 11:44:00 -07:00
stages	tracing: Just use strcmp() for testing __string() and __assign_str() match	2024-03-19 11:23:30 -07:00
bpf_probe.h	kernel.h: split out COUNT_ARGS() and CONCATENATE() to args.h	2023-08-18 10:18:56 -07:00
define_custom_trace.h
define_trace.h
perf.h	perf/tracing: Use stage6 of tracing to not duplicate macros	2023-01-25 10:31:24 -05:00
syscall.h
trace_custom_events.h
trace_events.h