mirror of https://gitee.com/openkylin/linux.git
5d48545e5e
Reimplement execvp for our purposes - after we call fork() it is fundamentally unsafe to use the kernel allocator - current is not valid there. So we simply pass to our modified execvp() a preallocated buffer. This fixes a real bug and works very well in testing (I've seen indirectly warning messages from the forked thread - they went on the pipe connected to its stdout and where read as a number by UML, when calling read_output(). I verified the obtained number corresponded to "BUG:"). The added use of __cant_sleep() is not a new bug since __cant_sleep() is already used in the same function - passing an atomicity parameter would be better but it would require huge change, stating that this function must not be called in atomic context and can sleep is a better idea (will make sure of this gradually). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| .. | ||
| drivers | ||
| include | ||
| skas | ||
| sys-i386 | ||
| sys-x86_64 | ||
| Makefile | ||
| aio.c | ||
| elf_aux.c | ||
| execvp.c | ||
| file.c | ||
| helper.c | ||
| irq.c | ||
| main.c | ||
| mem.c | ||
| process.c | ||
| sigio.c | ||
| signal.c | ||
| start_up.c | ||
| time.c | ||
| tls.c | ||
| trap.c | ||
| tt.c | ||
| tty.c | ||
| tty_log.c | ||
| uaccess.c | ||
| umid.c | ||
| user_syms.c | ||
| util.c | ||