mbox series

[for-linus,0/3] tracing: Some more fixes before pushing to 6.6

Message ID 20230912182213.795801173@goodmis.org
Headers
Series tracing: Some more fixes before pushing to 6.6 |

Message

Steven Rostedt Sept. 12, 2023, 6:22 p.m. UTC 
  Tracing updates for 6.6:

- Fix NULL pointer dereference with eventfs_remove_rec()
  If an allocation fails in one of the eventfs_add_*() functions,
  the caller of it in event_subsystem_dir() or event_create_dir()
  assigns the result to the structure. But it's assigning the ERR_PTR
  and not NULL. This was passed to eventfs_remove_rec() which expects
  either a good pointer or a NULL, not ERR_PTR. The fix is to not
  assign the ERR_PTR to the structure, but to keep it NULL on error.

- Fix list_for_each_rcu() to use list_for_each_srcu() in
  dcache_dir_open_wrapper(). One iteration of the code used RCU
  but because it had to call sleepable code, it had to be changed
  to use SRCU, but one of the iterations was missed.

- Fix synthetic event print function to use "as_u64" instead of
  passing in a pointer to the union. To fix big/little endian issues,
  the u64 that represented several types was turned into a union to
  define the types properly.

  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
trace/urgent

Head SHA1: c8414dab164a74bd3bb859a2d836cb537d6b9298


Jinjie Ruan (1):
      eventfs: Fix the NULL pointer dereference bug in eventfs_remove_rec()

Steven Rostedt (Google) (1):
      tracefs/eventfs: Use list_for_each_srcu() in dcache_dir_open_wrapper()

Tero Kristo (1):
      tracing/synthetic: Print out u64 values properly

----
 fs/tracefs/event_inode.c          |  3 ++-
 kernel/trace/trace_events.c       | 13 +++++++++----
 kernel/trace/trace_events_synth.c |  2 +-
 3 files changed, 12 insertions(+), 6 deletions(-)