The patch titled x86: uv: xpc NULL deref when mesq becomes empty has been removed from the -mm tree. Its filename was x86-uv-xpc-null-deref-when-mesq-becomes-empty.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: x86: uv: xpc NULL deref when mesq becomes empty From: Robin Holt <holt@xxxxxxx> Under heavy load conditions, our set of xpc messages may become exhausted. The code handles this correctly with the exception of the management code which hits a NULL pointer dereference. Signed-off-by: Robin Holt <holt@xxxxxxx> Cc: Jack Steiner <steiner@xxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/misc/sgi-xp/xpc_uv.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff -puN drivers/misc/sgi-xp/xpc_uv.c~x86-uv-xpc-null-deref-when-mesq-becomes-empty drivers/misc/sgi-xp/xpc_uv.c --- a/drivers/misc/sgi-xp/xpc_uv.c~x86-uv-xpc-null-deref-when-mesq-becomes-empty +++ a/drivers/misc/sgi-xp/xpc_uv.c @@ -949,11 +949,13 @@ xpc_get_fifo_entry_uv(struct xpc_fifo_he head->first = first->next; if (head->first == NULL) head->last = NULL; + + head->n_entries--; + BUG_ON(head->n_entries < 0); + + first->next = NULL; } - head->n_entries--; - BUG_ON(head->n_entries < 0); spin_unlock_irqrestore(&head->lock, irq_flags); - first->next = NULL; return first; } _ Patches currently in -mm which might be from holt@xxxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html