Description
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.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before d3b486946a4e62c7ef6023f7d9c1d049051384ba
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 3115313cf03113e87c87adee18ee49a20bbdb9ba
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before eea87acb6027be3dd4d3c57186bb22800d57fdda
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 359616ce587e524107730504891afa4b1a8be58c
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 0536f76a2bca83d1a3740517ba22cc93a44b3099
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 2c575c8905f7a8b32d5611b91856b69bac2a5bf1
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 67973caae78e21ee46a7281aaa8ca364eb9c444f
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 898f706695682b9954f280d95e49fa86ffa55d08
4.9.337 (semver)
4.14.303 (semver)
4.19.270 (semver)
5.4.229 (semver)
5.10.163 (semver)
5.15.86 (semver)
6.0.16 (semver)
6.1.2 (semver)
6.2 (original_commit_for_fix)
References
git.kernel.org/...c/d3b486946a4e62c7ef6023f7d9c1d049051384ba
git.kernel.org/...c/3115313cf03113e87c87adee18ee49a20bbdb9ba
git.kernel.org/...c/eea87acb6027be3dd4d3c57186bb22800d57fdda
git.kernel.org/...c/359616ce587e524107730504891afa4b1a8be58c
git.kernel.org/...c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
git.kernel.org/...c/0536f76a2bca83d1a3740517ba22cc93a44b3099
git.kernel.org/...c/2c575c8905f7a8b32d5611b91856b69bac2a5bf1
git.kernel.org/...c/67973caae78e21ee46a7281aaa8ca364eb9c444f
git.kernel.org/...c/898f706695682b9954f280d95e49fa86ffa55d08
