UBSAN: array-index-out-of-bounds in main.c:860:27

[devZer0]

Hello, i'm getting this kernel trace in dmesg when running csysdig from sysdig 0.41.2 with scap 8.1.0+driver on ubuntu 25.10 with kernel 6.17

so far it seems to work, but this message being thrown

[ 25.993749] scap: loading out-of-tree module taints kernel.
[ 25.993758] scap: module verification failed: signature and/or required key missing - tainting kernel
[ 25.995071] scap: driver loading, scap 8.1.0+driver
[ 25.996149] scap: adding new consumer 00000000ce51621a
[ 25.996164] scap: initializing ring buffer for CPU 0
[ 26.003004] scap: CPU buffer initialized, size=8388608
[ 26.003008] scap: initializing ring buffer for CPU 1
[ 26.013529] scap: CPU buffer initialized, size=8388608
[ 26.013534] scap: initializing ring buffer for CPU 2
[ 26.023994] scap: CPU buffer initialized, size=8388608
[ 26.023999] scap: initializing ring buffer for CPU 3
[ 26.032125] scap: CPU buffer initialized, size=8388608
[ 26.709843] ------------[ cut here ]------------
[ 26.709849] UBSAN: array-index-out-of-bounds in main.c:860:27
[ 26.709880] index 0 is out of range for type 'ppm_proc_info []'
[ 26.709896] CPU: 3 UID: 0 PID: 1319 Comm: csysdig Tainted: G OE 6.17.0-7-generic #7-Ubuntu PREEMPT(voluntary)
[ 26.709901] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
[ 26.709902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 26.709906] Call Trace:
[ 26.709913]
[ 26.709920] show_stack+0x49/0x60
[ 26.709934] dump_stack_lvl+0x5f/0x90
[ 26.709942] dump_stack+0x10/0x18
[ 26.709945] ubsan_epilogue+0x9/0x39
[ 26.709950] __ubsan_handle_out_of_bounds.cold+0x50/0x55
[ 26.709959] ppm_ioctl+0x331/0x890 [scap]
[ 26.709971] __x64_sys_ioctl+0xa3/0x100
[ 26.709979] x64_sys_call+0x1151/0x2330
[ 26.709982] do_syscall_64+0x81/0xc90
[ 26.709987] ? __alloc_frozen_pages_noprof+0x180/0x360
[ 26.709992] ? mod_memcg_lruvec_state+0x101/0x2f0
[ 26.709998] ? __lruvec_stat_mod_folio+0x8d/0x100
[ 26.710001] ? set_ptes.isra.0+0x3b/0x90
[ 26.710005] ? _raw_spin_unlock+0xe/0x40
[ 26.710009] ? do_anonymous_page+0x105/0x540
[ 26.710016] ? handle_pte_fault+0x1d7/0x1f0
[ 26.710019] ? __handle_mm_fault+0x59d/0x720
[ 26.710023] ? count_memcg_events+0xe7/0x250
[ 26.710025] ? handle_mm_fault+0x1e8/0x2f0
[ 26.710028] ? arch_exit_to_user_mode_prepare.isra.0+0xd/0x100
[ 26.710034] ? irqentry_exit_to_user_mode+0x2d/0x1d0
[ 26.710039] ? irqentry_exit+0x43/0x50
[ 26.710042] ? exc_page_fault+0x90/0x1b0
[ 26.710045] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 26.710047] RIP: 0033:0x70562af3287d
[ 26.710052] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[ 26.710054] RSP: 002b:00007ffcb2e4a2d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 26.710059] RAX: ffffffffffffffda RBX: 00007ffcb2e4a3a0 RCX: 000070562af3287d
[ 26.710060] RDX: 0000000013b5ffd0 RSI: 0000000000007310 RDI: 0000000000000003
[ 26.710061] RBP: 00007ffcb2e4a320 R08: 0000000000000000 R09: 00000000000000b8
[ 26.710062] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 26.710063] R13: 0000000000000100 R14: 0000000013b53830 R15: 0000000013b53bc8
[ 26.710066]
[ 26.710066] ---[ end trace ]---
[ 26.710073] ------------[ cut here ]------------
[ 26.710074] UBSAN: array-index-out-of-bounds in main.c:865:28
[ 26.710084] index 0 is out of range for type 'ppm_proc_info []'
[ 26.710094] CPU: 3 UID: 0 PID: 1319 Comm: csysdig Tainted: G OE 6.17.0-7-generic #7-Ubuntu PREEMPT(voluntary)
[ 26.710096] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
[ 26.710097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 26.710102] Call Trace:
[ 26.710103]
[ 26.710103] show_stack+0x49/0x60
[ 26.710107] dump_stack_lvl+0x5f/0x90
[ 26.710110] dump_stack+0x10/0x18
[ 26.710113] ubsan_epilogue+0x9/0x39
[ 26.710115] __ubsan_handle_out_of_bounds.cold+0x50/0x55
[ 26.710119] ppm_ioctl+0x347/0x890 [scap]
[ 26.710124] __x64_sys_ioctl+0xa3/0x100
[ 26.710127] x64_sys_call+0x1151/0x2330
[ 26.710129] do_syscall_64+0x81/0xc90
[ 26.710132] ? __alloc_frozen_pages_noprof+0x180/0x360
[ 26.710135] ? mod_memcg_lruvec_state+0x101/0x2f0
[ 26.710139] ? __lruvec_stat_mod_folio+0x8d/0x100
[ 26.710142] ? set_ptes.isra.0+0x3b/0x90
[ 26.710144] ? _raw_spin_unlock+0xe/0x40
[ 26.710147] ? do_anonymous_page+0x105/0x540
[ 26.710150] ? handle_pte_fault+0x1d7/0x1f0
[ 26.710153] ? __handle_mm_fault+0x59d/0x720
[ 26.710157] ? count_memcg_events+0xe7/0x250
[ 26.710159] ? handle_mm_fault+0x1e8/0x2f0
[ 26.710162] ? arch_exit_to_user_mode_prepare.isra.0+0xd/0x100
[ 26.710165] ? irqentry_exit_to_user_mode+0x2d/0x1d0
[ 26.710168] ? irqentry_exit+0x43/0x50
[ 26.710170] ? exc_page_fault+0x90/0x1b0
[ 26.710172] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 26.710174] RIP: 0033:0x70562af3287d
[ 26.710175] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[ 26.710176] RSP: 002b:00007ffcb2e4a2d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 26.710178] RAX: ffffffffffffffda RBX: 00007ffcb2e4a3a0 RCX: 000070562af3287d
[ 26.710179] RDX: 0000000013b5ffd0 RSI: 0000000000007310 RDI: 0000000000000003
[ 26.710180] RBP: 00007ffcb2e4a320 R08: 0000000000000000 R09: 00000000000000b8
[ 26.710181] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 26.710182] R13: 0000000000000100 R14: 0000000013b53830 R15: 0000000013b53bc8
[ 26.710185]
[ 26.710215] ---[ end trace ]---
[ 26.710217] ------------[ cut here ]------------
[ 26.710218] UBSAN: array-index-out-of-bounds in main.c:866:28
[ 26.710229] index 0 is out of range for type 'ppm_proc_info [*]'
[ 26.710239] CPU: 3 UID: 0 PID: 1319 Comm: csysdig Tainted: G OE 6.17.0-7-generic #7-Ubuntu PREEMPT(voluntary)
[ 26.710241] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
[ 26.710242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 26.710243] Call Trace:
[ 26.710243]
[ 26.710244] show_stack+0x49/0x60
[ 26.710248] dump_stack_lvl+0x5f/0x90
[ 26.710251] dump_stack+0x10/0x18
[ 26.710254] ubsan_epilogue+0x9/0x39
[ 26.710256] __ubsan_handle_out_of_bounds.cold+0x50/0x55
[ 26.710259] ppm_ioctl+0x366/0x890 [scap]
[ 26.710265] __x64_sys_ioctl+0xa3/0x100
[ 26.710268] x64_sys_call+0x1151/0x2330
[ 26.710270] do_syscall_64+0x81/0xc90
[ 26.710273] ? __alloc_frozen_pages_noprof+0x180/0x360
[ 26.710276] ? mod_memcg_lruvec_state+0x101/0x2f0
[ 26.710280] ? __lruvec_stat_mod_folio+0x8d/0x100
[ 26.710284] ? set_ptes.isra.0+0x3b/0x90
[ 26.710286] ? _raw_spin_unlock+0xe/0x40
[ 26.710288] ? do_anonymous_page+0x105/0x540
[ 26.710291] ? handle_pte_fault+0x1d7/0x1f0
[ 26.710294] ? __handle_mm_fault+0x59d/0x720
[ 26.710297] ? count_memcg_events+0xe7/0x250
[ 26.710299] ? handle_mm_fault+0x1e8/0x2f0
[ 26.710302] ? arch_exit_to_user_mode_prepare.isra.0+0xd/0x100
[ 26.710305] ? irqentry_exit_to_user_mode+0x2d/0x1d0
[ 26.710307] ? irqentry_exit+0x43/0x50
[ 26.710310] ? exc_page_fault+0x90/0x1b0
[ 26.710313] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 26.710314] RIP: 0033:0x70562af3287d
[ 26.710315] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[ 26.710317] RSP: 002b:00007ffcb2e4a2d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 26.710318] RAX: ffffffffffffffda RBX: 00007ffcb2e4a3a0 RCX: 000070562af3287d
[ 26.710320] RDX: 0000000013b5ffd0 RSI: 0000000000007310 RDI: 0000000000000003
[ 26.710321] RBP: 00007ffcb2e4a320 R08: 0000000000000000 R09: 00000000000000b8
[ 26.710322] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 26.710323] R13: 0000000000000100 R14: 0000000013b53830 R15: 0000000013b53bc8
[ 26.710325]
[ 26.710326] ---[ end trace ]---
[ 41.455027] scap: deallocating consumer 00000000ce51621a