Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbAllocAG Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds. Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d3b486946a4e62c7ef6023f7d9c1d049051384ba; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3115313cf03113e87c87adee18ee49a20bbdb9ba; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before eea87acb6027be3dd4d3c57186bb22800d57fdda; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 359616ce587e524107730504891afa4b1a8be58c; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0536f76a2bca83d1a3740517ba22cc93a44b3099; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2c575c8905f7a8b32d5611b91856b69bac2a5bf1; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 67973caae78e21ee46a7281aaa8ca364eb9c444f; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 898f706695682b9954f280d95e49fa86ffa55d08 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 4.9.337 through 4.9.*; unaffected 4.14.303 through 4.14.*; unaffected 4.19.270 through 4.19.*; unaffected 5.4.229 through 5.4.*; unaffected 5.10.163 through 5.10.*; unaffected 5.15.86 through 5.15.*; unaffected 6.0.16 through 6.0.*; unaffected 6.1.2 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d3b486946a4e62c7ef6023f7d9c1d049051384ba
- https://git.kernel.org/stable/c/3115313cf03113e87c87adee18ee49a20bbdb9ba
- https://git.kernel.org/stable/c/eea87acb6027be3dd4d3c57186bb22800d57fdda
- https://git.kernel.org/stable/c/359616ce587e524107730504891afa4b1a8be58c
- https://git.kernel.org/stable/c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
- https://git.kernel.org/stable/c/0536f76a2bca83d1a3740517ba22cc93a44b3099
- https://git.kernel.org/stable/c/2c575c8905f7a8b32d5611b91856b69bac2a5bf1
- https://git.kernel.org/stable/c/67973caae78e21ee46a7281aaa8ca364eb9c444f
- https://git.kernel.org/stable/c/898f706695682b9954f280d95e49fa86ffa55d08