Currently, the "mod -S" command may cause that the "bt/sym" commands incorrectly translate the kernel module virtual address to symbol names, if a kernel module contains a per-cpu section, this was reported on PPC64 kernel. Without the patch: crash> mod -S ../usr/lib/debug/lib/modules/5.14.0-xxx.ppc64le ... crash> bt PID: 35705 TASK: c0000000b0365680 CPU: 16 COMMAND: "lsof" ... [NIP : __key.7+32443920] [LR : __key.7+32446288] #4 [c0000000394df9c0] __key.7 at c00800001ce82040 [overlay] (unreliable) #5 [c0000000394dfa00] walk_component at c0000000005c914c ... crash> sym c00800001ce82040 c00800001ce82040 (b) __key.7+32443920 [bnx2i] /usr/src/debug/kernel-5.14.0-xxx/linux-5.14.0-xxx.ppc64le/fs/overlayfs/super.c: 122 With the patch: crash> mod -S ../usr/lib/debug/lib/modules/5.14.0-xxx.ppc64le ... crash> bt PID: 35705 TASK: c0000000b0365680 CPU: 16 COMMAND: "lsof" ... [NIP : ovl_revalidate_real+40] [LR : ovl_dentry_revalidate_common+136] #4 [c0000000394df9c0] ovl_revalidate_real at c00800001ce82040 [overlay] #5 [c0000000394dfa00] walk_component at c0000000005c914c ... crash> sym c00800001ce82040 c00800001ce82040 (t) ovl_revalidate_real+40 [overlay] /usr/src/debug/kernel-5.14.0-xxx/linux-5.14.0-xxx.ppc64le/fs/overlayfs/super.c: 122 Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com&gt; --- symbols.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/symbols.c b/symbols.c index c446beb43a76..e6865cabef74 100644 --- a/symbols.c +++ b/symbols.c @@ -5679,7 +5679,7 @@ value_search_module_6_4(ulong value, ulong *offset) splast = NULL; for ( ; sp <= sp_end; sp++) { - if (machine_type("ARM64") && + if ((machine_type("ARM64") || machine_type("PPC64")) && IN_MODULE_PERCPU(sp->value, lm) && !IN_MODULE_PERCPU(value, lm)) continue; @@ -5769,10 +5769,10 @@ retry: */ splast = NULL; for ( ; sp <= sp_end; sp++) { - if (machine_type("ARM64") && + if ((machine_type("ARM64") || machine_type("PPC64")) && IN_MODULE_PERCPU(sp->value, lm) && - !IN_MODULE_PERCPU(value, lm)) - continue; + !IN_MODULE_PERCPU(value, lm)) + continue; if (value == sp->value) { if (MODULE_END(sp) || MODULE_INIT_END(sp)) -- 2.51.1