diff options
| author | James Morse <[email protected]> | 2023-08-01 14:54:08 +0000 |
|---|---|---|
| committer | Luis Chamberlain <[email protected]> | 2023-08-03 13:42:02 -0700 |
| commit | f928f8b1a2496e7af95b860f9acf553f20f68f16 (patch) | |
| tree | 816aa5bca37373b5324e594084a29cc6b500f54d | |
| parent | 2abcc4b5a64a65a2d2287ba0be5c2871c1552416 (diff) | |
arm64: module: Use module_init_layout_section() to spot init sections
Today module_frob_arch_sections() spots init sections from their
'init' prefix, and uses this to keep the init PLTs separate from the rest.
module_emit_plt_entry() uses within_module_init() to determine if a
location is in the init text or not, but this depends on whether
core code thought this was an init section.
Naturally the logic is different.
module_init_layout_section() groups the init and exit text together if
module unloading is disabled, as the exit code will never run. The result
is kernels with this configuration can't load all their modules because
there are not enough PLTs for the combined init+exit section.
This results in the following:
| WARNING: CPU: 2 PID: 51 at arch/arm64/kernel/module-plts.c:99 module_emit_plt_entry+0x184/0x1cc
| Modules linked in: crct10dif_common
| CPU: 2 PID: 51 Comm: modprobe Not tainted 6.5.0-rc4-yocto-standard-dirty #15208
| Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
| pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
| pc : module_emit_plt_entry+0x184/0x1cc
| lr : module_emit_plt_entry+0x94/0x1cc
| sp : ffffffc0803bba60
[...]
| Call trace:
| module_emit_plt_entry+0x184/0x1cc
| apply_relocate_add+0x2bc/0x8e4
| load_module+0xe34/0x1bd4
| init_module_from_file+0x84/0xc0
| __arm64_sys_finit_module+0x1b8/0x27c
| invoke_syscall.constprop.0+0x5c/0x104
| do_el0_svc+0x58/0x160
| el0_svc+0x38/0x110
| el0t_64_sync_handler+0xc0/0xc4
| el0t_64_sync+0x190/0x194
A previous patch exposed module_init_layout_section(), use that so the
logic is the same.
Reported-by: Adam Johnston <[email protected]>
Tested-by: Adam Johnston <[email protected]>
Fixes: 055f23b74b20 ("module: check for exit sections in layout_sections() instead of module_init_section()")
Cc: <[email protected]> # 5.15.x: 60a0aab7463ee69 arm64: module-plts: inline linux/moduleloader.h
Cc: <[email protected]> # 5.15.x
Signed-off-by: James Morse <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Luis Chamberlain <[email protected]>
| -rw-r--r-- | arch/arm64/kernel/module-plts.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/module-plts.c b/arch/arm64/kernel/module-plts.c index ad02058756b5..bd69a4e7cd60 100644 --- a/arch/arm64/kernel/module-plts.c +++ b/arch/arm64/kernel/module-plts.c @@ -339,7 +339,7 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, if (nents) sort(rels, nents, sizeof(Elf64_Rela), cmp_rela, NULL); - if (!str_has_prefix(secstrings + dstsec->sh_name, ".init")) + if (!module_init_layout_section(secstrings + dstsec->sh_name)) core_plts += count_plts(syms, rels, numrels, sechdrs[i].sh_info, dstsec); else |