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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-06-21 10:18:16 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-06-21 10:18:16 -0700 |
commit | b7b8a44f3abab51cc2772c5ced2fe2f51a1ad2b8 (patch) | |
tree | 74c81a259f9365273ca6b0fa28aee7c71e2fdb46 /drivers/android/binder.c | |
parent | cf24242189b935826a88feedb64761cbf483e42c (diff) | |
parent | 6f828c55e26769666e0ae56b037f948dc26fe0d4 (diff) | |
download | linux-b7b8a44f3abab51cc2772c5ced2fe2f51a1ad2b8.tar.bz2 |
Merge tag 'char-misc-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are a number of small driver fixes for 5.2-rc6
Nothing major, just fixes for reported issues:
- soundwire fixes
- thunderbolt fixes
- MAINTAINERS update for fpga maintainer change
- binder bugfix
- habanalabs 64bit pointer fix
- documentation updates
All of these have been in linux-next with no reported issues"
* tag 'char-misc-5.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
habanalabs: use u64_to_user_ptr() for reading user pointers
doc: fix documentation about UIO_MEM_LOGICAL using
MAINTAINERS / Documentation: Thorsten Scherer is the successor of Gavin Schenk
docs: fb: Add TER16x32 to the available font names
MAINTAINERS: fpga: hand off maintainership to Moritz
thunderbolt: Implement CIO reset correctly for Titan Ridge
binder: fix possible UAF when freeing buffer
thunderbolt: Make sure device runtime resume completes before taking domain lock
soundwire: intel: set dai min and max channels correctly
soundwire: stream: fix bad unlock balance
soundwire: stream: fix out of boundary access on port properties
Diffstat (limited to 'drivers/android/binder.c')
-rw-r--r-- | drivers/android/binder.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 748ac489ef7e..bc26b5511f0a 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -1941,8 +1941,18 @@ static void binder_free_txn_fixups(struct binder_transaction *t) static void binder_free_transaction(struct binder_transaction *t) { - if (t->buffer) - t->buffer->transaction = NULL; + struct binder_proc *target_proc = t->to_proc; + + if (target_proc) { + binder_inner_proc_lock(target_proc); + if (t->buffer) + t->buffer->transaction = NULL; + binder_inner_proc_unlock(target_proc); + } + /* + * If the transaction has no target_proc, then + * t->buffer->transaction has already been cleared. + */ binder_free_txn_fixups(t); kfree(t); binder_stats_deleted(BINDER_STAT_TRANSACTION); @@ -3551,10 +3561,12 @@ err_invalid_target_handle: static void binder_free_buf(struct binder_proc *proc, struct binder_buffer *buffer) { + binder_inner_proc_lock(proc); if (buffer->transaction) { buffer->transaction->buffer = NULL; buffer->transaction = NULL; } + binder_inner_proc_unlock(proc); if (buffer->async_transaction && buffer->target_node) { struct binder_node *buf_node; struct binder_work *w; |