14251809b1
This fixes a problem seen by a number of people running UML on newer host kernels. init would hang with an infinite segfault loop. It turns out that the host kernel was providing a AT_SYSINFO_EHDR of 0xffffe000, which faked UML into believing that the host VDSO page could be reused. However, AT_SYSINFO pointed into the middle of the address space, and was unmapped as a result. Because UML was providing AT_SYSINFO_EHDR and AT_SYSINFO to its own processes, these would branch to nowhere when trying to use the VDSO. The fix is to also check the location of AT_SYSINFO when deciding whether to use the host's VDSO. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.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 | ||