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| author | Gaosheng Cui <[email protected]> | 2022-10-31 05:58:33 +0000 |
|---|---|---|
| committer | Theodore Ts'o <[email protected]> | 2022-12-09 02:49:23 +0000 |
| commit | 3bf678a0f9c017c9ba7c581541dbc8453452a7ae (patch) | |
| tree | a0c954f2e134e3ebb6b19d84cb86d192553b2ad9 /fs/ext4/fast_commit.c | |
| parent | ext4: fix bug_on in __es_tree_search caused by bad boot loader inode (diff) | |
| download | kernel-3bf678a0f9c017c9ba7c581541dbc8453452a7ae.tar.gz kernel-3bf678a0f9c017c9ba7c581541dbc8453452a7ae.zip | |
ext4: fix undefined behavior in bit shift for ext4_check_flag_values
Shifting signed 32-bit value by 31 bits is undefined, so changing
significant bit to unsigned. The UBSAN warning calltrace like below:
UBSAN: shift-out-of-bounds in fs/ext4/ext4.h:591:2
left shift of 1 by 31 places cannot be represented in type 'int'
Call Trace:
<TASK>
dump_stack_lvl+0x7d/0xa5
dump_stack+0x15/0x1b
ubsan_epilogue+0xe/0x4e
__ubsan_handle_shift_out_of_bounds+0x1e7/0x20c
ext4_init_fs+0x5a/0x277
do_one_initcall+0x76/0x430
kernel_init_freeable+0x3b3/0x422
kernel_init+0x24/0x1e0
ret_from_fork+0x1f/0x30
</TASK>
Fixes: 9a4c80194713 ("ext4: ensure Inode flags consistency are checked at build time")
Signed-off-by: Gaosheng Cui <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>
Cc: [email protected]
Diffstat (limited to 'fs/ext4/fast_commit.c')
0 files changed, 0 insertions, 0 deletions