blk-iocost: avoid out of bounds shift
In the Linux kernel, the following vulnerability has been resolved: blk-iocost: avoid out of bounds shift UBSAN catches undefined behavior in blk-iocost, where sometimes iocg->delay is shifted right by a number that is too large, resulting in undefined behavior on some architectures. [ 186.556576] ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in block/blk-iocost.c:1366:23 shift exponent 64 is too large for 64-bit type 'u64' (aka 'unsigned long long') CPU: 16 PID: 0 Comm: swapper/16 Tainted: G S E N 6.9.0-0_fbk700_debug_rc2_kbuilder_0_gc85af715cac0 #1 Hardware name: Quanta Twin Lakes MP/Twin Lakes Passive MP, BIOS F09_3A23 12/08/2020 Call Trace: dump_stack_lvl+0x8f/0xe0 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 iocg_kick_delay+0x30b/0x310 ioc_timer_fn+0x2fb/0x1f80 __run_timer_base+0x1b6/0x250 ... Avoid that undefined behavior by simply taking the "delay = 0" branch if the shift is too large. I am not sure what the symptoms of an undefined value delay will be, but I suspect it could be more than a little annoying to debug.
CVE-2024-36916
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-36916
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5160a5a53c0c4ae3708959d9465ea43ad5d90542",
"lessThan": "62accf6c1d7b433752cb3591bba8967b7a801ad5",
"versionType": "git"
},
{
"status": "affected",
"version": "5160a5a53c0c4ae3708959d9465ea43ad5d90542",
"lessThan": "844fc023e9f14a4fb1de5ae1eaefafd6d69c5fa1",
"versionType": "git"
},
{
"status": "affected",
"version": "5160a5a53c0c4ae3708959d9465ea43ad5d90542",
"lessThan": "f6add0a6f78dc6360b822ca4b6f9f2f14174c8ca",
"versionType": "git"
},
{
"status": "affected",
"version": "5160a5a53c0c4ae3708959d9465ea43ad5d90542",
"lessThan": "ce0e99cae00e3131872936713b7f55eefd53ab86",
"versionType": "git"
},
{
"status": "affected",
"version": "5160a5a53c0c4ae3708959d9465ea43ad5d90542",
"lessThan": "488dc6808cb8369685f18cee81e88e7052ac153b",
"versionType": "git"
},
{
"status": "affected",
"version": "5160a5a53c0c4ae3708959d9465ea43ad5d90542",
"lessThan": "beaa51b36012fad5a4d3c18b88a617aea7a9b96d",
"versionType": "git"
}
],
"programFiles": [
"block/blk-iocost.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.217",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.159",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.91",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.31",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.8.10",
"versionType": "semver",
"lessThanOrEqual": "6.8.*"
},
{
"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"block/blk-iocost.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-36916
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26590 · Revision 1
- Added to Heist Feed
- Publisher date