diff options
| author | Zhang Yi <[email protected]> | 2025-08-11 06:45:32 +0000 |
|---|---|---|
| committer | Theodore Ts'o <[email protected]> | 2025-08-13 03:15:05 +0000 |
| commit | 02c7f7219ac0e2277b3379a3a0e9841ef464b6d4 (patch) | |
| tree | 27eea3a056587feeed0a218959a317c2b566bfd9 /drivers/pci/controller/vmd.c | |
| parent | ext4: don't try to clear the orphan_present feature block device is r/o (diff) | |
| download | kernel-02c7f7219ac0e2277b3379a3a0e9841ef464b6d4.tar.gz kernel-02c7f7219ac0e2277b3379a3a0e9841ef464b6d4.zip | |
ext4: fix hole length calculation overflow in non-extent inodes
In a filesystem with a block size larger than 4KB, the hole length
calculation for a non-extent inode in ext4_ind_map_blocks() can easily
exceed INT_MAX. Then it could return a zero length hole and trigger the
following waring and infinite in the iomap infrastructure.
------------[ cut here ]------------
WARNING: CPU: 3 PID: 434101 at fs/iomap/iter.c:34 iomap_iter_done+0x148/0x190
CPU: 3 UID: 0 PID: 434101 Comm: fsstress Not tainted 6.16.0-rc7+ #128 PREEMPT(voluntary)
Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : iomap_iter_done+0x148/0x190
lr : iomap_iter+0x174/0x230
sp : ffff8000880af740
x29: ffff8000880af740 x28: ffff0000db8e6840 x27: 0000000000000000
x26: 0000000000000000 x25: ffff8000880af830 x24: 0000004000000000
x23: 0000000000000002 x22: 000001bfdbfa8000 x21: ffffa6a41c002e48
x20: 0000000000000001 x19: ffff8000880af808 x18: 0000000000000000
x17: 0000000000000000 x16: ffffa6a495ee6cd0 x15: 0000000000000000
x14: 00000000000003d4 x13: 00000000fa83b2da x12: 0000b236fc95f18c
x11: ffffa6a4978b9c08 x10: 0000000000001da0 x9 : ffffa6a41c1a2a44
x8 : ffff8000880af5c8 x7 : 0000000001000000 x6 : 0000000000000000
x5 : 0000000000000004 x4 : 000001bfdbfa8000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000004004030000 x0 : 0000000000000000
Call trace:
iomap_iter_done+0x148/0x190 (P)
iomap_iter+0x174/0x230
iomap_fiemap+0x154/0x1d8
ext4_fiemap+0x110/0x140 [ext4]
do_vfs_ioctl+0x4b8/0xbc0
__arm64_sys_ioctl+0x8c/0x120
invoke_syscall+0x6c/0x100
el0_svc_common.constprop.0+0x48/0xf0
do_el0_svc+0x24/0x38
el0_svc+0x38/0x120
el0t_64_sync_handler+0x10c/0x138
el0t_64_sync+0x198/0x1a0
---[ end trace 0000000000000000 ]---
Cc: [email protected]
Fixes: facab4d9711e ("ext4: return hole from ext4_map_blocks()")
Reported-by: Qu Wenruo <[email protected]>
Closes: https://lore.kernel.org/linux-ext4/[email protected]/
Tested-by: Qu Wenruo <[email protected]>
Signed-off-by: Zhang Yi <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>
Diffstat (limited to 'drivers/pci/controller/vmd.c')
0 files changed, 0 insertions, 0 deletions