https://github.com/torvalds/linux
Revision 9cc6d9e5daaa147a9a3e31557efcb331989e77be authored by Nathan Lynch on 29 September 2014, 18:11:36 UTC, committed by Russell King on 30 September 2014, 15:55:23 UTC
Joachim Eastwood reports that commit fbfb872f5f41 "ARM: 8148/1: flush TLS and thumbee register state during exec" causes a boot-time crash on a Cortex-M4 nommu system: Freeing unused kernel memory: 68K (281e5000 - 281f6000) Unhandled exception: IPSR = 00000005 LR = fffffff1 CPU: 0 PID: 1 Comm: swapper Not tainted 3.17.0-rc6-00313-gd2205fa30aa7 #191 task: 29834000 ti: 29832000 task.ti: 29832000 PC is at flush_thread+0x2e/0x40 LR is at flush_thread+0x21/0x40 pc : [<2800954a>] lr : [<2800953d>] psr: 4100000b sp : 29833d60 ip : 00000000 fp : 00000001 r10: 00003cf8 r9 : 29b1f000 r8 : 00000000 r7 : 29b0bc00 r6 : 29834000 r5 : 29832000 r4 : 29832000 r3 : ffff0ff0 r2 : 29832000 r1 : 00000000 r0 : 282121f0 xPSR: 4100000b CPU: 0 PID: 1 Comm: swapper Not tainted 3.17.0-rc6-00313-gd2205fa30aa7 #191 [<2800afa5>] (unwind_backtrace) from [<2800a327>] (show_stack+0xb/0xc) [<2800a327>] (show_stack) from [<2800a963>] (__invalid_entry+0x4b/0x4c) The problem is that set_tls is attempting to clear the TLS location in the kernel-user helper page, which isn't set up on V7M. Fix this by guarding the write to the kuser helper page with a CONFIG_KUSER_HELPERS ifdef. Fixes: fbfb872f5f41 ARM: 8148/1: flush TLS and thumbee register state during exec Reported-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Nathan Lynch <nathan_lynch@mentor.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
1 parent ebc7725
Tip revision: 9cc6d9e5daaa147a9a3e31557efcb331989e77be authored by Nathan Lynch on 29 September 2014, 18:11:36 UTC
ARM: 8178/1: fix set_tls for !CONFIG_KUSER_HELPERS
ARM: 8178/1: fix set_tls for !CONFIG_KUSER_HELPERS
Tip revision: 9cc6d9e
File | Mode | Size |
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bridge | ||
i2c | ||
ttm | ||
drmP.h | -rw-r--r-- | 52.0 KB |
drm_agpsupport.h | -rw-r--r-- | 4.5 KB |
drm_buffer.h | -rw-r--r-- | 4.5 KB |
drm_cache.h | -rw-r--r-- | 1.5 KB |
drm_core.h | -rw-r--r-- | 1.4 KB |
drm_crtc.h | -rw-r--r-- | 40.5 KB |
drm_crtc_helper.h | -rw-r--r-- | 6.6 KB |
drm_dp_helper.h | -rw-r--r-- | 21.3 KB |
drm_dp_mst_helper.h | -rw-r--r-- | 13.7 KB |
drm_edid.h | -rw-r--r-- | 8.4 KB |
drm_encoder_slave.h | -rw-r--r-- | 6.4 KB |
drm_fb_cma_helper.h | -rw-r--r-- | 874 bytes |
drm_fb_helper.h | -rw-r--r-- | 5.2 KB |
drm_fixed.h | -rw-r--r-- | 3.9 KB |
drm_flip_work.h | -rw-r--r-- | 2.7 KB |
drm_gem_cma_helper.h | -rw-r--r-- | 1.7 KB |
drm_global.h | -rw-r--r-- | 2.0 KB |
drm_hashtab.h | -rw-r--r-- | 3.1 KB |
drm_mem_util.h | -rw-r--r-- | 2.0 KB |
drm_memory.h | -rw-r--r-- | 1.9 KB |
drm_mipi_dsi.h | -rw-r--r-- | 4.8 KB |
drm_mm.h | -rw-r--r-- | 10.4 KB |
drm_modes.h | -rw-r--r-- | 8.6 KB |
drm_modeset_lock.h | -rw-r--r-- | 3.8 KB |
drm_of.h | -rw-r--r-- | 365 bytes |
drm_os_linux.h | -rw-r--r-- | 2.2 KB |
drm_panel.h | -rw-r--r-- | 4.7 KB |
drm_pciids.h | -rw-r--r-- | 66.3 KB |
drm_plane_helper.h | -rw-r--r-- | 2.6 KB |
drm_rect.h | -rw-r--r-- | 5.0 KB |
drm_sysfs.h | -rw-r--r-- | 300 bytes |
drm_usb.h | -rw-r--r-- | 375 bytes |
drm_vma_manager.h | -rw-r--r-- | 8.4 KB |
exynos_drm.h | -rw-r--r-- | 2.6 KB |
gma_drm.h | -rw-r--r-- | 1.0 KB |
i915_drm.h | -rw-r--r-- | 3.4 KB |
i915_pciids.h | -rw-r--r-- | 9.3 KB |
i915_powerwell.h | -rw-r--r-- | 1.6 KB |
intel-gtt.h | -rw-r--r-- | 860 bytes |
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