mirror of
https://github.com/CVEProject/cvelist.git
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103 lines
6.6 KiB
JSON
103 lines
6.6 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-40998",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix uninitialized ratelimit_state->lock access in __ext4_fill_super()\n\nIn the following concurrency we will access the uninitialized rs->lock:\n\next4_fill_super\n ext4_register_sysfs\n // sysfs registered msg_ratelimit_interval_ms\n // Other processes modify rs->interval to\n // non-zero via msg_ratelimit_interval_ms\n ext4_orphan_cleanup\n ext4_msg(sb, KERN_INFO, \"Errors on filesystem, \"\n __ext4_msg\n ___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state)\n if (!rs->interval) // do nothing if interval is 0\n return 1;\n raw_spin_trylock_irqsave(&rs->lock, flags)\n raw_spin_trylock(lock)\n _raw_spin_trylock\n __raw_spin_trylock\n spin_acquire(&lock->dep_map, 0, 1, _RET_IP_)\n lock_acquire\n __lock_acquire\n register_lock_class\n assign_lock_key\n dump_stack();\n ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);\n raw_spin_lock_init(&rs->lock);\n // init rs->lock here\n\nand get the following dump_stack:\n\n=========================================================\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nyou didn't initialize this object before use?\nturning off the locking correctness validator.\nCPU: 12 PID: 753 Comm: mount Tainted: G E 6.7.0-rc6-next-20231222 #504\n[...]\nCall Trace:\n dump_stack_lvl+0xc5/0x170\n dump_stack+0x18/0x30\n register_lock_class+0x740/0x7c0\n __lock_acquire+0x69/0x13a0\n lock_acquire+0x120/0x450\n _raw_spin_trylock+0x98/0xd0\n ___ratelimit+0xf6/0x220\n __ext4_msg+0x7f/0x160 [ext4]\n ext4_orphan_cleanup+0x665/0x740 [ext4]\n __ext4_fill_super+0x21ea/0x2b10 [ext4]\n ext4_fill_super+0x14d/0x360 [ext4]\n[...]\n=========================================================\n\nNormally interval is 0 until s_msg_ratelimit_state is initialized, so\n___ratelimit() does nothing. But registering sysfs precedes initializing\nrs->lock, so it is possible to change rs->interval to a non-zero value\nvia the msg_ratelimit_interval_ms interface of sysfs while rs->lock is\nuninitialized, and then a call to ext4_msg triggers the problem by\naccessing an uninitialized rs->lock. Therefore register sysfs after all\ninitializations are complete to avoid such problems."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "1da177e4c3f4",
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"version_value": "23afcd52af06"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "6.6.36",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.9.7",
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"lessThanOrEqual": "6.9.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/23afcd52af06880c6c913a0ad99022b8937b575c",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/23afcd52af06880c6c913a0ad99022b8937b575c"
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},
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{
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"url": "https://git.kernel.org/stable/c/645267906944a9aeec9d5c56ee24a9096a288798",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/645267906944a9aeec9d5c56ee24a9096a288798"
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},
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{
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"url": "https://git.kernel.org/stable/c/b4b4fda34e535756f9e774fb2d09c4537b7dfd1c",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/b4b4fda34e535756f9e774fb2d09c4537b7dfd1c"
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}
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]
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},
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"generator": {
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"engine": "bippy-9e1c9544281a"
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}
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} |