From: Yao Zi Date: Fri, 19 Sep 2025 12:58:29 +0000 (+0000) Subject: LoongArch: Fix bitflag conflict for TIF_FIXADE X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3ec09344b01a15901ba824e877a0562ed8103e27;p=thirdparty%2Fkernel%2Fstable.git LoongArch: Fix bitflag conflict for TIF_FIXADE After LoongArch was converted to use the generic TIF bits in commit f9629891d407 ("loongarch: Use generic TIF bits"), its TIF_FIXADE flag takes the same bit with TIF_RESTORE_SIGMASK in thread_info.flags. Such conflict causes TIF_FIXADE being considered cleared when TIF_RESTORE_SIGMASK is cleared during deliver of a signal. And since TIF_FIXADE determines whether unaligned access emulation works for a task, userspace making use of unaligned access will receive unexpected SIGBUS (and likely terminate) after receiving its first signal. This conflict looks like a simple typo, switch it to the free bit 19. Fixes: f9629891d407 ("loongarch: Use generic TIF bits") Signed-off-by: Yao Zi Signed-off-by: Thomas Gleixner Reviewed-by: Wentao Guan --- diff --git a/arch/loongarch/include/asm/thread_info.h b/arch/loongarch/include/asm/thread_info.h index def7cb14467ec..4d7117fcdc78c 100644 --- a/arch/loongarch/include/asm/thread_info.h +++ b/arch/loongarch/include/asm/thread_info.h @@ -77,7 +77,7 @@ register unsigned long current_stack_pointer __asm__("$sp"); #define TIF_NOHZ 16 /* in adaptive nohz mode */ #define TIF_USEDFPU 17 /* FPU was used by this task this quantum (SMP) */ #define TIF_USEDSIMD 18 /* SIMD has been used this quantum */ -#define TIF_FIXADE 10 /* Fix address errors in software */ +#define TIF_FIXADE 19 /* Fix address errors in software */ #define TIF_LOGADE 20 /* Log address errors to syslog */ #define TIF_32BIT_REGS 21 /* 32-bit general purpose registers */ #define TIF_32BIT_ADDR 22 /* 32-bit address space */