mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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37 lines
2.9 KiB
JSON
37 lines
2.9 KiB
JSON
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{
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"id": "CVE-2024-49870",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-10-21T18:15:08.413",
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"lastModified": "2024-10-21T18:15:08.413",
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"vulnStatus": "Received",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: fix dentry leak in cachefiles_open_file()\n\nA dentry leak may be caused when a lookup cookie and a cull are concurrent:\n\n P1 | P2\n-----------------------------------------------------------\ncachefiles_lookup_cookie\n cachefiles_look_up_object\n lookup_one_positive_unlocked\n // get dentry\n cachefiles_cull\n inode->i_flags |= S_KERNEL_FILE;\n cachefiles_open_file\n cachefiles_mark_inode_in_use\n __cachefiles_mark_inode_in_use\n can_use = false\n if (!(inode->i_flags & S_KERNEL_FILE))\n can_use = true\n\t return false\n return false\n // Returns an error but doesn't put dentry\n\nAfter that the following WARNING will be triggered when the backend folder\nis umounted:\n\n==================================================================\nBUG: Dentry 000000008ad87947{i=7a,n=Dx_1_1.img} still in use (1) [unmount of ext4 sda]\nWARNING: CPU: 4 PID: 359261 at fs/dcache.c:1767 umount_check+0x5d/0x70\nCPU: 4 PID: 359261 Comm: umount Not tainted 6.6.0-dirty #25\nRIP: 0010:umount_check+0x5d/0x70\nCall Trace:\n <TASK>\n d_walk+0xda/0x2b0\n do_one_tree+0x20/0x40\n shrink_dcache_for_umount+0x2c/0x90\n generic_shutdown_super+0x20/0x160\n kill_block_super+0x1a/0x40\n ext4_kill_sb+0x22/0x40\n deactivate_locked_super+0x35/0x80\n cleanup_mnt+0x104/0x160\n==================================================================\n\nWhether cachefiles_open_file() returns true or false, the reference count\nobtained by lookup_positive_unlocked() in cachefiles_look_up_object()\nshould be released.\n\nTherefore release that reference count in cachefiles_look_up_object() to\nfix the above issue and simplify the code."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7fa2382f97421978514a419c93054eca69f5247b",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/c7d10fa7d7691558ff967668494672415f5fa151",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/d32ff64c872d7e08e893c32ba6a2374583444410",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/da6ef2dffe6056aad3435e6cf7c6471c2a62187c",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/e4a28489b310339b2b8187bec0a437709be551c1",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}
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]
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}
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