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Gregory Herrero 7483fd25ff recordmcount: only record relocation of type R_AARCH64_CALL26 on arm64. 
[ Upstream commit ea0eada45632f4807b2f49de951072283e2d781c ]

Currently, if a section has a relocation to '_mcount' symbol, a new
__mcount_loc entry will be added whatever the relocation type is.
This is problematic when a relocation to '_mcount' is in the middle of a
section and is not a call for ftrace use.

Such relocation could be generated with below code for example:
    bool is_mcount(unsigned long addr)
    {
        return (target == (unsigned long) &_mcount);
    }

With this snippet of code, ftrace will try to patch the mcount location
generated by this code on module load and fail with:

    Call trace:
     ftrace_bug+0xa0/0x28c
     ftrace_process_locs+0x2f4/0x430
     ftrace_module_init+0x30/0x38
     load_module+0x14f0/0x1e78
     __do_sys_finit_module+0x100/0x11c
     __arm64_sys_finit_module+0x28/0x34
     el0_svc_common+0x88/0x194
     el0_svc_handler+0x38/0x8c
     el0_svc+0x8/0xc
    ---[ end trace d828d06b36ad9d59 ]---
    ftrace failed to modify
    [<ffffa2dbf3a3a41c>] 0xffffa2dbf3a3a41c
     actual:   66:a9:3c:90
    Initializing ftrace call sites
    ftrace record flags: 2000000
     (0)
    expected tramp: ffffa2dc6cf66724

So Limit the relocation type to R_AARCH64_CALL26 as in perl version of
recordmcount.

Fixes: af64d2aa872a ("ftrace: Add arm64 support to recordmcount")
Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20200717143338.19302-1-gregory.herrero@oracle.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-03-16 16:33:17 +08:00
Documentation doc: dt: bindings: usb: dwc3: Update entries for disabling SS instances in park mode 2021-03-16 16:31:55 +08:00
LICENSES Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
arch ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages 2021-03-16 16:33:16 +08:00
block block: fix get_max_segment_size() overflow on 32bit arch 2021-03-16 16:32:16 +08:00
certs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
crypto keys: asymmetric: fix error return code in software_key_query() 2021-03-16 16:32:01 +08:00
drivers spi: lantiq: fix: Rx overflow error in full duplex mode 2021-03-16 16:33:16 +08:00
fs fs/io_uring.c: Fix uninitialized variable is referenced in io_submit_sqe 2021-03-16 16:33:12 +08:00
include tpm: Require that all digests are present in TCG_PCR_EVENT2 structures 2021-03-16 16:33:17 +08:00
init x86: Fix early boot crash on gcc-10, third try 2021-03-16 16:28:02 +08:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2021-03-16 16:27:51 +08:00
kernel sched/uclamp: Fix initialization of struct uclamp_rq 2021-03-16 16:33:14 +08:00
lib crc-t10dif: Fix potential crypto notify dead-lock 2021-03-16 16:33:13 +08:00
mm mm/filemap.c: don't bother dropping mmap_sem for zero size readahead 2021-03-16 16:32:44 +08:00
net nfsd: Fix NFSv4 READ on RDMA when using readv 2021-03-16 16:33:11 +08:00
package config/arm64: OPEN CONFIG_PSI and phytium configs 2021-03-16 11:02:59 +08:00
samples samples/vfs: avoid warning in statx override 2021-03-16 16:31:20 +08:00
scripts recordmcount: only record relocation of type R_AARCH64_CALL26 on arm64. 2021-03-16 16:33:17 +08:00
security ima: move APPRAISE_BOOTPARAM dependency on ARCH_POLICY to runtime 2021-03-16 16:33:11 +08:00
sound ALSA: hda: fix NULL pointer dereference during suspend 2021-03-16 16:33:06 +08:00
tools selftests/net: relax cpu affinity requirement in msg_zerocopy test 2021-03-16 16:33:10 +08:00
usr Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
virt KVM: arm64: Don't inherit exec permission across page-table levels 2021-03-16 16:32:57 +08:00
.clang-format Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.cocciconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.get_maintainer.ignore Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.gitattributes Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
.gitignore Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
COPYING Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
CREDITS Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kbuild Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
MAINTAINERS Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Makefile Makefile: Fix GCC_TOOLCHAIN_DIR prefix for Clang cross compilation 2021-03-16 16:32:37 +08:00
README Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
README.md Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
backport_remove_lists.txt Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
tools_key.pub Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00

README.md

Tencent Linux Kernel 4.0