WARNING: at kernel/trace/ftrace.c:2425 ftrace_get_addr_new

From: Naresh Kamboju
Date: Tue Aug 25 2020 - 15:34:33 EST

While running LTP tracing tests on qemu_i386 running mainline linux master
branch kernel the kernel warning continuously popped up on console.

metadata:
git branch: master
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git commit: 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a
git describe: v5.9-rc2-42-g6a9dc5fd6170
make_kernelversion: 5.9.0-rc2
kernel-config:
https://builds.tuxbuild.com/xpCK22s8vIl8tmDm4G8wVw/kernel.config

steps to reproduce:
# Boot qemu i386 with trace configs enabled.
# cd /opt/ltp
# ./runltp -f tracing

ftrace-stress-test 1 TINFO: killing 694
/opt/ltp/testcases/bin/ftrace_stress_test.sh: line 73: 694 Killed
sh ftrace_${target}.sh
ftrace-stress-test 1 TINFO: Finished running the test. Run dmesg to
double-check for bugs
[ 151.266804] ------------[ cut here ]------------
[ 151.268375] WARNING: CPU: 0 PID: 654 at kernel/trace/ftrace.c:2425
ftrace_get_addr_new+0x8a/0xf0
[ 151.270337] Modules linked in:
[ 151.271117] CPU: 0 PID: 654 Comm: ftrace_stress_t Not tainted 5.9.0-rc2 #1
[ 151.272718] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 151.274600] EIP: ftrace_get_addr_new+0x8a/0xf0
[ 151.275694] Code: 8b 3b 8b 35 48 6b 50 d4 8b 46 30 8b 48 04 8b 10
89 f8 e8 09 df ff ff 84 c0 75 55 8b 76 04 85 f6 74 08 81 fe 60 6b 50
d4 75 de <0f> 0b c7 05 54 6b 50 d4 00 00 00 00 c7 05 44 6b 50 d4 f0 ca
2c d3
[ 151.279628] EAX: 00000000 EBX: f4c40000 ECX: 00000000 EDX: 00000000
[ 151.280844] ESI: d4507040 EDI: d32002e8 EBP: f32ddea0 ESP: f32dde94
[ 151.281737] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 151.282762] CR0: 80050033 CR2: 0a0849e0 CR3: 328bd000 CR4: 003506d0
[ 151.283725] Call Trace:
[ 151.284148] ftrace_replace_code+0x12f/0x150
[ 151.284791] ftrace_modify_all_code+0xba/0x170
[ 151.285531] arch_ftrace_update_code+0x8/0x10
[ 151.286158] ftrace_run_update_code+0x16/0x80
[ 151.286808] ftrace_startup_enable+0x30/0x40
[ 151.287550] ftrace_enable_sysctl+0x124/0x15e
[ 151.288173] ? ftrace_is_dead+0x10/0x10
[ 151.288781] proc_sys_call_handler+0x11f/0x150
[ 151.289502] ? proc_sys_call_handler+0x150/0x150
[ 151.290170] proc_sys_write+0x12/0x20
[ 151.290741] vfs_write+0xb3/0x200
[ 151.291393] ksys_write+0x58/0xd0
[ 151.291885] __ia32_sys_write+0x15/0x20
[ 151.292476] __do_fast_syscall_32+0x3f/0x70
[ 151.293090] do_fast_syscall_32+0x29/0x60
[ 151.293739] do_SYSENTER_32+0x15/0x20
[ 151.294357] entry_SYSENTER_32+0x9f/0xf2
[ 151.294955] EIP: 0xb7f85549
[ 151.295450] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01
10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f
34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90
8d 76
[ 151.298035] EAX: ffffffda EBX: 00000001 ECX: 0a08b9f0 EDX: 00000002
[ 151.299024] ESI: 0a08b9f0 EDI: 00000002 EBP: b7f4ed80 ESP: bf8f9e90
[ 151.299992] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
[ 151.301039] ---[ end trace 13d91cd42a9362c2 ]---
[ 151.301820] Bad trampoline accounting at: 97ee436a
(sanitize_boot_params.constprop.0+0x0/0xa8) (10000001)
[ 151.303214] ------------[ cut here ]------------
[ 151.303985] WARNING: CPU: 0 PID: 654 at kernel/trace/ftrace.c:2425
ftrace_get_addr_new+0x8a/0xf0
[ 151.305246] Modules linked in:
[ 151.305768] CPU: 0 PID: 654 Comm: ftrace_stress_t Tainted: G
W 5.9.0-rc2 #1
[ 151.306984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 151.308241] EIP: ftrace_get_addr_new+0x8a/0xf0
[ 151.308964] Code: 8b 3b 8b 35 48 6b 50 d4 8b 46 30 8b 48 04 8b 10
89 f8 e8 09 df ff ff 84 c0 75 55 8b 76 04 85 f6 74 08 81 fe 60 6b 50
d4 75 de <0f> 0b c7 05 54 6b 50 d4 00 00 00 00 c7 05 44 6b 50 d4 f0 ca
2c d3
[ 151.311612] EAX: 00000000 EBX: f4c40008 ECX: 00000000 EDX: 00000000
[ 151.312594] ESI: d4507040 EDI: d3200390 EBP: f32ddea0 ESP: f32dde94
[ 151.313544] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 151.314544] CR0: 80050033 CR2: 0a0849e0 CR3: 328bd000 CR4: 003506d0
[ 151.315543] Call Trace:
[ 151.315947] ftrace_replace_code+0x12f/0x150
[ 151.316589] ftrace_modify_all_code+0xba/0x170
[ 151.317325] arch_ftrace_update_code+0x8/0x10
[ 151.317948] ftrace_run_update_code+0x16/0x80
[ 151.318626] ftrace_startup_enable+0x30/0x40
[ 151.319367] ftrace_enable_sysctl+0x124/0x15e
[ 151.320025] ? ftrace_is_dead+0x10/0x10
[ 151.320613] proc_sys_call_handler+0x11f/0x150
[ 151.321346] ? proc_sys_call_handler+0x150/0x150
[ 151.322042] proc_sys_write+0x12/0x20
[ 151.322639] vfs_write+0xb3/0x200
[ 151.323192] ksys_write+0x58/0xd0
[ 151.323748] __ia32_sys_write+0x15/0x20
[ 151.324386] __do_fast_syscall_32+0x3f/0x70
[ 151.324991] do_fast_syscall_32+0x29/0x60
[ 151.325597] do_SYSENTER_32+0x15/0x20
[ 151.326170] entry_SYSENTER_32+0x9f/0xf2
[ 151.326774] EIP: 0xb7f85549
[ 151.327209] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01
10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f
34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90
8d 76
[ 151.329767] EAX: ffffffda EBX: 00000001 ECX: 0a08b9f0 EDX: 00000002
[ 151.330777] ESI: 0a08b9f0 EDI: 00000002 EBP: b7f4ed80 ESP: bf8f9e90
[ 151.331762] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
[ 151.332774] ---[ end trace 13d91cd42a9362c3 ]---
[ 151.333520] Bad trampoline accounting at: f22f519e
(trace_initcall_finish_cb+0x0/0x40) (10000001)
[ 151.334788] ------------[ cut here ]------------
[ 151.335586] WARNING: CPU: 0 PID: 654 at kernel/trace/ftrace.c:2425
ftrace_get_addr_new+0x8a/0xf0
[ 151.336843] Modules linked in:
[ 151.337358] CPU: 0 PID: 654 Comm: ftrace_stress_t Tainted: G
W 5.9.0-rc2 #1
[ 151.338541] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 151.339826] EIP: ftrace_get_addr_new+0x8a/0xf0
[ 151.340547] Code: 8b 3b 8b 35 48 6b 50 d4 8b 46 30 8b 48 04 8b 10
89 f8 e8 09 df ff ff 84 c0 75 55 8b 76 04 85 f6 74 08 81 fe 60 6b 50
d4 75 de <0f> 0b c7 05 54 6b 50 d4 00 00 00 00 c7 05 44 6b 50 d4 f0 ca
2c d3
[ 151.343103] EAX: 00000000 EBX: f4c40010 ECX: 00000000 EDX: 00000000
[ 151.344098] ESI: d4507040 EDI: d32007c0 EBP: f32ddea0 ESP: f32dde94
[ 151.345026] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[ 151.346078] CR0: 80050033 CR2: 0a0849e0 CR3: 328bd000 CR4: 003506d0
[ 151.346987] Call Trace:
[ 151.347447] ftrace_replace_code+0x12f/0x150
[ 151.348075] ftrace_modify_all_code+0xba/0x170
[ 151.348745] arch_ftrace_update_code+0x8/0x10
[ 151.349501] ftrace_run_update_code+0x16/0x80
[ 151.350175] ftrace_startup_enable+0x30/0x40
[ 151.350845] ftrace_enable_sysctl+0x124/0x15e
[ 151.351605] ? ftrace_is_dead+0x10/0x10
[ 151.352170] proc_sys_call_handler+0x11f/0x150
[ 151.352832] ? proc_sys_call_handler+0x150/0x150
[ 151.353599] proc_sys_write+0x12/0x20
[ 151.354163] vfs_write+0xb3/0x200
[ 151.354694] ksys_write+0x58/0xd0
[ 151.355237] __ia32_sys_write+0x15/0x20
[ 151.355848] __do_fast_syscall_32+0x3f/0x70
[ 151.356525] do_fast_syscall_32+0x29/0x60
[ 151.357106] do_SYSENTER_32+0x15/0x20
[ 151.357675] entry_SYSENTER_32+0x9f/0xf2
[ 151.358391] EIP: 0xb7f85549
[ 151.358821] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01
10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f
34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90
8d 76
[ 151.361407] EAX: ffffffda EBX: 00000001 ECX: 0a08b9f0 EDX: 00000002
[ 151.362434] ESI: 0a08b9f0 EDI: 00000002 EBP: b7f4ed80 ESP: bf8f9e90
[ 151.363367] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246
[ 151.364402] ---[ end trace 13d91cd42a9362c4 ]---
[ 151.365082] Bad trampoline accounting at: f89b861d
(initcall_blacklisted+0x0/0xd0) (10000001)
[ 151.366309] ------------[ cut here ]------------
[ 151.367062] WARNING: CPU: 0 PID: 654 at kernel/trace/ftrace.c:2425
ftrace_get_addr_new+0x8a/0xf0

ref:
https://qa-reports.linaro.org/lkft/linux-mainline-oe/build/v5.9-rc2-42-g6a9dc5fd6170/testrun/3113849/suite/linux-log-parser/test/check-kernel-exception-1707157/log


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https://lkft.linaro.org