CVE ID:	CVE-2023-52810
Description:	In the Linux kernel, the following vulnerability has been resolved: fs/jfs: Add check for negative db_l2nbperpage l2nbperpage is log2(number of blks per page), and the minimum legal value should be 0, not negative. In the case of l2nbperpage being negative, an error will occur when subsequently used as shift exponent. Syzbot reported this bug: UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12 shift exponent -16777216 is negative
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2023-52810 https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6 https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6 https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45 https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45 https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907 https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907 https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa https://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53f https://git.kernel.org/stable/c/5f148b16972e5f4592629b244d5109b15135f53f https://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dc https://git.kernel.org/stable/c/8f2964df6bfce9d92d81ca552010b8677af8d9dc https://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1 https://git.kernel.org/stable/c/a81a56b4cbe3142cc99f6b98e8f9b3a631c768e1 https://git.kernel.org/stable/c/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01 https://git.kernel.org/stable/c/cc61fcf7d1c99f148fe8ddfb5c6ed0bb75861f01