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/nsfs.c:306:32 left shift of 1 by 31 places cannot be represented in type 'int' CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.3.0-rc4+ #2 Call trace: <TASK> dump_backtrace+0x134/0x1e0 show_stack+0x2c/0x3c dump_stack_lvl+0xb0/0xd4 dump_stack+0x14/0x1c ubsan_epilogue+0xc/0x3c __ubsan_handle_shift_out_of_bounds+0xb0/0x14c nsfs_init+0x4c/0xb0 start_kernel+0x38c/0x738 __primary_switched+0xbc/0xc4 </TASK> Signed-off-by: Hao Ge <gehao@xxxxxxxxxx> --- include/linux/fs.h | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/include/linux/fs.h b/include/linux/fs.h index c85916e9f7db..86ab23a05b61 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1069,19 +1069,19 @@ extern int send_sigurg(struct fown_struct *fown); #define SB_NOATIME 1024 /* Do not update access times. */ #define SB_NODIRATIME 2048 /* Do not update directory access times */ #define SB_SILENT 32768 -#define SB_POSIXACL (1<<16) /* VFS does not apply the umask */ -#define SB_INLINECRYPT (1<<17) /* Use blk-crypto for encrypted files */ -#define SB_KERNMOUNT (1<<22) /* this is a kern_mount call */ -#define SB_I_VERSION (1<<23) /* Update inode I_version field */ -#define SB_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */ +#define SB_POSIXACL (1U<<16) /* VFS does not apply the umask */ +#define SB_INLINECRYPT (1U<<17) /* Use blk-crypto for encrypted files */ +#define SB_KERNMOUNT (1U<<22) /* this is a kern_mount call */ +#define SB_I_VERSION (1U<<23) /* Update inode I_version field */ +#define SB_LAZYTIME (1U<<25) /* Update the on-disk [acm]times lazily */ /* These sb flags are internal to the kernel */ -#define SB_SUBMOUNT (1<<26) -#define SB_FORCE (1<<27) -#define SB_NOSEC (1<<28) -#define SB_BORN (1<<29) -#define SB_ACTIVE (1<<30) -#define SB_NOUSER (1<<31) +#define SB_SUBMOUNT (1U<<26) +#define SB_FORCE (1U<<27) +#define SB_NOSEC (1U<<28) +#define SB_BORN (1U<<29) +#define SB_ACTIVE (1U<<30) +#define SB_NOUSER (1U<<31) /* These flags relate to encoding and casefolding */ #define SB_ENC_STRICT_MODE_FL (1 << 0) -- 2.25.1 No virus found Checked by Hillstone Network AntiVirus
