Doug / smarc-fsl-linux-kernel

Download as
Browse Code ยป

Commit 2492218c63dca0fb4f041bdc366d243ae3426b40

Authored by Daniel Hellstrom
Committed by David S. Miller
1 parent 5edddaab1d
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

sparc32: unaligned memory access (MNA) trap handler bug 

Since commit f0e98c387e61de00646be31fab4c2fa0224e1efb ("[SPARC]: Fix
link errors with gcc-4.3") the MNA trap handler does not emulate
stores to unaligned addresses correctly. MNA operation from both
kernel and user space are affected.

A typical effect of this bug is nr_frags in skbs are overwritten
during buffer copying/checksum-calculation, or maximally 6 bytes
of data in the network buffer will be overwitten with garbage.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 2 additions and 2 deletions Side-by-side Diff

arch/sparc/kernel/una_asm_32.S
Diff comments   View file @ 2492218
... ... @@ -24,9 +24,9 @@
24 24 .globl __do_int_store
25 25 __do_int_store:
26 26 ld [%o2], %g1
27   - cmp %1, 2
  27 + cmp %o1, 2
28 28 be 2f
29   - cmp %1, 4
  29 + cmp %o1, 4
30 30 be 1f
31 31 srl %g1, 24, %g2
32 32 srl %g1, 16, %g7