Created attachment 273969 [details] arg=0 crash and no .fixup use sock can api will crash in kernel my poset here~ https://community.nxp.com/thread/464833 my fix way here~ 1. ~myandroid/kernel_imx/arch/arm/include/asm/uaccess.h static inline unsigned long __must_check copy_from_user(void *to, const void __user *from, unsigned long n) { if (access_ok(VERIFY_READ, from, n)) { /*** begin: issue #: avoid arg crash in copy_from_user ***/ if ( from ) n = __copy_from_user(to, from, n); /*** end: issue #: avoid arg crash in copy_from_user ***/ } else /* security hole - plug it */ { memset(to, 0, n); } return n; } 2. ~myandroid/kernel_imx/arch/arm/lib/copy_from_user.S ENDPROC(__copy_from_user) /*** begin: issue #5404: socket can ***/ /*.pushsection .fixup,"ax"*/ .pushsection .text.fixup,"ax" /*** end: issue #5404 ***/ .align 0 copy_abort_preamble ldmfd sp!, {r1, r2} sub r3, r0, r1 rsb r1, r3, r2 str r1, [sp] bl __memzero ldr r0, [sp], #4 copy_abort_end .popsection 3. ~myandroid/kernel_imx/drivers/scsi/mac_scsi.c search all .fixup change to .text.fixup
the same issue here https://bbs.csdn.net/topics/370250542