Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid out-of-boundary access in dnode page As Jiaming Zhang reported: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x1c1/0x2a0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x17e/0x800 mm/kasan/report.c:480 kasan_report+0x147/0x180 mm/kasan/report.c:593 data_blkaddr fs/f2fs/f2fs.h:3053 [inline] f2fs_data_blkaddr fs/f2fs/f2fs.h:3058 [inline] f2fs_get_dnode_of_data+0x1a09/0x1c40 fs/f2fs/node.c:855 f2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1195 prepare_write_begin fs/f2fs/data.c:3395 [inline] f2fs_write_begin+0xf39/0x2190 fs/f2fs/data.c:3594 generic_perform_write+0x2c7/0x910 mm/filemap.c:4112 f2fs_buffered_write_iter fs/f2fs/file.c:4988 [inline] f2fs_file_write_iter+0x1ec8/0x2410 fs/f2fs/file.c:5216 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x546/0xa90 fs/read_write.c:686 ksys_write+0x149/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x3d0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is in the corrupted image, there is a dnode has the same node id w/ its inode, so during f2fs_get_dnode_of_data(), it tries to access block address in dnode at offset 934, however it parses the dnode as inode node, so that get_dnode_addr() returns 360, then it tries to access page address from 360 + 934 * 4 = 4096 w/ 4 bytes. To fix this issue, let's add sanity check for node id of all direct nodes during f2fs_get_dnode_of_data().
Product status
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before ee4d13f5407cbdf1216cc258f45492075713889a
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before a650654365c57407413e9b1f6ff4d539bf2e99ca
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before 6b7784ea07e6aa044f74b39d6b5af5e28746fc81
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before 901f62efd6e855f93d8b1175540f29f4dc45ba55
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before 92ef491b506a0f4dd971a3a76f86f2d8f5370180
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before 888aa660144bcb6ec07839da756ee46bfcf7fc53
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before f1d5093d9fe9f3c74c123741c88666cc853b79c5
98e4da8ca301e062d79ae168c67e56f3c3de3ce4 before 77de19b6867f2740cdcb6c9c7e50d522b47847a4
3.8
Any version before 3.8
5.4.297
5.10.241
5.15.190
6.1.149
6.6.103
6.12.44
6.16.4
6.17
References
git.kernel.org/...c/ee4d13f5407cbdf1216cc258f45492075713889a
git.kernel.org/...c/a650654365c57407413e9b1f6ff4d539bf2e99ca
git.kernel.org/...c/6b7784ea07e6aa044f74b39d6b5af5e28746fc81
git.kernel.org/...c/901f62efd6e855f93d8b1175540f29f4dc45ba55
git.kernel.org/...c/92ef491b506a0f4dd971a3a76f86f2d8f5370180
git.kernel.org/...c/888aa660144bcb6ec07839da756ee46bfcf7fc53
git.kernel.org/...c/f1d5093d9fe9f3c74c123741c88666cc853b79c5
git.kernel.org/...c/77de19b6867f2740cdcb6c9c7e50d522b47847a4
