CVE-2022-49317: f2fs: avoid infinite loop to flush node pages
In the Linux kernel, the following vulnerability has been resolved:
f2fs: avoid infinite loop to flush node pages
xfstests/generic/475 can give EIO all the time which give an infinite loop to flush node page like below. Let's avoid it.
[16418.518551] Call Trace: [16418.518553] ? dmsubmitbio+0x48/0x400 [16418.518574] ? submitbiochecks+0x1ac/0x5a0 [16418.525207] submitbio+0x1a9/0x230 [16418.525210] ? kmemcachealloc+0x29e/0x3c0 [16418.525223] submitbionoacct+0xa8/0x2b0 [16418.525226] submitbio+0x4d/0x130 [16418.525238] submitbio+0x49/0x310 [f2fs] [16418.525339] ? bioaddpage+0x6a/0x90 [16418.525344] f2fssubmitpagebio+0x134/0x1f0 [f2fs] [16418.525365] readnodepage+0x125/0x1b0 [f2fs] [16418.525388] getnodepage.part.0+0x58/0x3f0 [f2fs] [16418.525409] getnodepage+0x2f/0x60 [f2fs] [16418.525431] f2fsgetdnodeofdata+0x423/0x860 [f2fs] [16418.525452] ? asmsysvecapictimerinterrupt+0x12/0x20 [16418.525458] ? modmemcgstate.part.0+0x2a/0x30 [16418.525465] ? modmemcglruvecstate+0x27/0x40 [16418.525467] ? xasetmark+0x57/0x70 [16418.525472] f2fsdowritedatapage+0x10e/0x7b0 [f2fs] [16418.525493] f2fswritesingledatapage+0x555/0x830 [f2fs] [16418.525514] ? sysvecapictimerinterrupt+0x4e/0x90 [16418.525518] ? asmsysvecapictimerinterrupt+0x12/0x20 [16418.525523] f2fswritecachepages+0x303/0x880 [f2fs] [16418.525545] ? blkflushpluglist+0x47/0x100 [16418.525548] f2fswritedatapages+0xfd/0x320 [f2fs] [16418.525569] dowritepages+0xd5/0x210 [16418.525648] filemapfdatawritewbc+0x7d/0xc0 [16418.525655] filemapfdatawrite+0x50/0x70 [16418.525658] f2fssyncdirtyinodes+0xa4/0x230 [f2fs] [16418.525679] f2fswritecheckpoint+0x16d/0x1720 [f2fs] [16418.525699] ? ttwudowakeup+0x1c/0x160 [16418.525709] ? ttwudoactivate+0x6d/0xd0 [16418.525711] ? waitforcommon+0x11d/0x150 [16418.525715] killf2fssuper+0xca/0x100 [f2fs] [16418.525733] deactivatelockedsuper+0x3b/0xb0 [16418.525739] deactivatesuper+0x40/0x50 [16418.525741] cleanupmnt+0x139/0x190 [16418.525747] cleanupmnt+0x12/0x20 [16418.525749] taskworkrun+0x6d/0xa0 [16418.525765] exittousermodeprepare+0x1ad/0x1b0 [16418.525771] syscallexittousermode+0x27/0x50 [16418.525774] dosyscall64+0x48/0xc0 [16418.525776] entrySYSCALL64afterhwframe+0x44/0xae
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2022-49317?
The severity of CVE-2022-49317 is considered high due to the potential for an infinite loop affecting the flushing of node pages in the f2fs filesystem.
How do I fix CVE-2022-49317?
To fix CVE-2022-49317, you should upgrade to a patched version of the Linux Kernel that addresses this vulnerability.
What software is affected by CVE-2022-49317?
CVE-2022-49317 affects the Linux Kernel and specifically impacts the f2fs filesystem.
What are the symptoms of CVE-2022-49317?
The main symptom of CVE-2022-49317 is the occurrence of infinite loops when flushing node pages, which can lead to system hang or unresponsiveness.
Is CVE-2022-49317 exploitable remotely?
CVE-2022-49317 is not considered to be remotely exploitable as it primarily affects local file operations in the f2fs filesystem.