5.15-stable review patch. If anyone has any objections, please let me know.
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From: Christophe Leroy christophe.leroy@csgroup.eu
[ Upstream commit 344af27715ddbf357cf76978d674428b88f8e92d ]
While working on implementing user access validation on powerpc I got the following warnings on a pmac32_defconfig build:
CC fs/select.o fs/select.o: warning: objtool: sys_pselect6+0x1bc: redundant UACCESS disable fs/select.o: warning: objtool: sys_pselect6_time32+0x1bc: redundant UACCESS disable
On powerpc/32s, user_read_access_begin/end() are no-ops, but the failure path has a user_access_end() instead of user_read_access_end() which means an access end without any prior access begin.
Replace that user_access_end() by user_read_access_end().
Fixes: 7e71609f64ec ("pselect6() and friends: take handling the combined 6th/7th args into helper") Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu Link: https://lore.kernel.org/r/a7139e28d767a13e667ee3c79599a8047222ef36.173675122... Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/select.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/select.c b/fs/select.c index 668a5200503ae..7ce67428582e6 100644 --- a/fs/select.c +++ b/fs/select.c @@ -787,7 +787,7 @@ static inline int get_sigset_argpack(struct sigset_argpack *to, } return 0; Efault: - user_access_end(); + user_read_access_end(); return -EFAULT; }
@@ -1360,7 +1360,7 @@ static inline int get_compat_sigset_argpack(struct compat_sigset_argpack *to, } return 0; Efault: - user_access_end(); + user_read_access_end(); return -EFAULT; }