Mark Rutland e624efe36e lkdtm: don't move ctors to .rodata ... commit 3f618ab332 upstream. When building with KASAN and LKDTM, clang may implictly generate an asan.module_ctor function in the LKDTM rodata object. The Makefile moves the lkdtm_rodata_do_nothing() function into .rodata by renaming the file's .text section to .rodata, and consequently also moves the ctor function into .rodata, leading to a boot time crash (splat below) when the ctor is invoked by do_ctors(). Let's prevent this by marking the function as noinstr rather than notrace, and renaming the file's .noinstr.text to .rodata. Marking the function as noinstr will prevent tracing and kprobes, and will inhibit any undesireable compiler instrumentation. The ctor function (if any) will be placed in .text and will work correctly. Example splat before this patch is applied: [ 0.916359] Unable to handle kernel execute from non-executable memory at virtual address ffffa0006b60f5ac [ 0.922088] Mem abort info: [ 0.922828] ESR = 0x8600000e [ 0.923635] EC = 0x21: IABT (current EL), IL = 32 bits [ 0.925036] SET = 0, FnV = 0 [ 0.925838] EA = 0, S1PTW = 0 [ 0.926714] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000427b3000 [ 0.928489] [ffffa0006b60f5ac] pgd=000000023ffff003, p4d=000000023ffff003, pud=000000023fffe003, pmd=0068000042000f01 [ 0.931330] Internal error: Oops: 8600000e [#1] PREEMPT SMP [ 0.932806] Modules linked in: [ 0.933617] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.10.0-rc7 #2 [ 0.935620] Hardware name: linux,dummy-virt (DT) [ 0.936924] pstate: 40400005 (nZcv daif +PAN -UAO -TCO BTYPE=--) [ 0.938609] pc : asan.module_ctor+0x0/0x14 [ 0.939759] lr : do_basic_setup+0x4c/0x70 [ 0.940889] sp : ffff27b600177e30 [ 0.941815] x29: ffff27b600177e30 x28: 0000000000000000 [ 0.943306] x27: 0000000000000000 x26: 0000000000000000 [ 0.944803] x25: 0000000000000000 x24: 0000000000000000 [ 0.946289] x23: 0000000000000001 x22: 0000000000000000 [ 0.947777] x21: ffffa0006bf4a890 x20: ffffa0006befb6c0 [ 0.949271] x19: ffffa0006bef9358 x18: 0000000000000068 [ 0.950756] x17: fffffffffffffff8 x16: 0000000000000000 [ 0.952246] x15: 0000000000000000 x14: 0000000000000000 [ 0.953734] x13: 00000000838a16d5 x12: 0000000000000001 [ 0.955223] x11: ffff94000da74041 x10: dfffa00000000000 [ 0.956715] x9 : 0000000000000000 x8 : ffffa0006b60f5ac [ 0.958199] x7 : f9f9f9f9f9f9f9f9 x6 : 000000000000003f [ 0.959683] x5 : 0000000000000040 x4 : 0000000000000000 [ 0.961178] x3 : ffffa0006bdc15a0 x2 : 0000000000000005 [ 0.962662] x1 : 00000000000000f9 x0 : ffffa0006bef9350 [ 0.964155] Call trace: [ 0.964844] asan.module_ctor+0x0/0x14 [ 0.965895] kernel_init_freeable+0x158/0x198 [ 0.967115] kernel_init+0x14/0x19c [ 0.968104] ret_from_fork+0x10/0x30 [ 0.969110] Code: 00000003 00000000 00000000 00000000 (00000000) [ 0.970815] ---[ end trace b5339784e20d015c ]--- Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Kees Cook <keescook@chromium.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20201207170533.10738-1-mark.rutland@arm.com Cc: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-02-17 11:02:24 +01:00
..
altera-stapl
c2port	misc: c2port: core: Ensure source size does not equal destination size in strncpy()	2020-06-29 18:45:52 +02:00
cardreader	misc: rtsx: Add power saving functions and fix driving parameter	2020-09-16 17:30:37 +02:00
cb710	misc: cb710: sgbuf2: Add missing documentation for cb710_sg_dwiter_write_next_block()'s 'data' arg	2020-06-29 18:45:53 +02:00
cxl	cxl: Rework error message for incompatible slots	2020-08-25 01:31:32 +10:00
echo	char: Replace HTTP links with HTTPS ones	2020-07-23 09:44:15 +02:00
eeprom	misc: eeprom: at24: fix NVMEM name with custom AT24 device name	2020-12-04 10:46:36 +01:00
genwqe	pci-v5.9-changes	2020-08-07 18:48:15 -07:00
habanalabs	habanalabs: disable FW events on device removal	2021-02-07 15:37:17 +01:00
ibmasm	misc: ibmasm: dot_command: Demote function headers from kerneldoc	2020-07-01 15:08:03 +02:00
lis3lv02d
lkdtm	lkdtm: don't move ctors to .rodata	2021-02-17 11:02:24 +01:00
mei	Revert "mei: virtio: virtualization frontend driver"	2020-12-06 10:36:17 +01:00
ocxl	powerpc updates for 5.10	2020-10-16 12:21:15 -07:00
sgi-gru	x86/platform/uv: Update Copyrights to conform to HPE standards	2020-10-07 09:10:07 +02:00
sgi-xp	x86/platform/uv: Update Copyrights to conform to HPE standards	2020-10-07 09:10:07 +02:00
ti-st	misc: ti-st: st_kim: Tidy-up bespoke commentry	2020-06-29 18:45:52 +02:00
uacce	Char/Misc driver patches for 5.10-rc1	2020-10-15 10:01:51 -07:00
vmw_vmci	misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells()	2021-01-06 14:56:52 +01:00
ad525x_dpot-i2c.c
ad525x_dpot-spi.c
ad525x_dpot.c	docs: misc-devices/pci-endpoint-test.txt: convert to ReST	2020-06-19 14:05:49 -06:00
ad525x_dpot.h
apds990x.c
apds9802als.c
atmel-ssc.c	misc: atmel-ssc: lock with mutex instead of spinlock	2020-06-29 19:10:51 +02:00
atmel_tclib.c
bh1770glc.c
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
enclosure.c	misc: enclosure: Update enclosure_remove_device() documentation to match reality	2020-07-01 15:05:37 +02:00
fastrpc.c	misc: fastrpc: add ioctl for attaching to sensors pd	2020-09-16 17:30:37 +02:00
hisi_hikey_usb.c	misc: hisi_hikey_usb: delete a stray tab	2020-09-22 18:54:00 +02:00
hmc6352.c
hpilo.c	misc: hpilo: avoid a useless memset	2020-07-23 12:56:49 +02:00
hpilo.h	hpilo: Replace one-element array with flexible-array member	2020-07-14 18:21:25 +02:00
ibmvmc.c	mm, treewide: rename kzfree() to kfree_sensitive()	2020-08-07 11:33:22 -07:00
ibmvmc.h
ics932s401.c
isl29003.c
isl29020.c
Kconfig	misc: mic: remove the MIC drivers	2020-10-28 19:12:03 +01:00
kgdbts.c	kgdbts: switch to kernel_clone()	2020-08-20 13:12:59 +02:00
lattice-ecp3-config.c	misc: lattice-ecp3-config: Remove set but clearly unused variable 'ret'	2020-07-01 15:05:37 +02:00
Makefile	misc: mic: remove the MIC drivers	2020-10-28 19:12:03 +01:00
pch_phub.c	misc: pch_phub: Remove superfluous descriptions to non-existent args 'offset_address'	2020-07-01 15:05:37 +02:00
pci_endpoint_test.c	misc: pci_endpoint_test: fix return value of error branch	2020-12-30 11:53:45 +01:00
phantom.c	misc/phantom.c: use generic power management	2020-06-29 18:43:42 +02:00
pti.c	misc: pti: Remove unparsable empty line in function header	2020-07-01 15:05:36 +02:00
pvpanic.c	misc: pvpanic: Use devm_platform_ioremap_resource()	2020-09-22 18:53:30 +02:00
qcom-coincell.c
sram-exec.c	char: Replace HTTP links with HTTPS ones	2020-07-23 09:44:15 +02:00
sram.c
sram.h
tifm_7xx1.c	misc/tifm_7xx1.c: use generic power management	2020-06-29 18:43:42 +02:00
tifm_core.c
tsl2550.c
vmw_balloon.c
xilinx_sdfec.c	misc: xilinx-sdfec: convert get_user_pages() --> pin_user_pages()	2020-05-27 11:09:26 +02:00