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bcachefs: Fix an integer overflow

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Fixes:

bcachefs (e7fdc10e-54a3-49d9-bd0c-390370889d84): disk usage increased 4294967296 more than 2823707312 sectors reserved)
transaction updates for __bchfs_fallocate journal seq 467859
  update: btree=extents cached=0 bch2_trans_update+0x4e8/0x540
    old u64s 5 type deleted 536925940:3559337304:4294967283 len 0 ver 0
    new u64s 6 type reservation 536925940:3559337304:4294967283 len 3559337304 ver 0: generation 0 replicas 2
  update: btree=inodes cached=1 bch2_extent_update_i_size_sectors+0x305/0x3b0
    old u64s 19 type inode_v3 0:536925940:4294967283 len 0 ver 0: mode 100600 flags 15300000 journal_seq 467859 bi_size 0 bi_sectors 0 bi_version 0 bi_atime 40905301656446 bi_ctime 40905301656446 bi_mtime 40905301656446 bi_otime 40905301656446 bi_uid 0 bi_gid 0 bi_nlink 0 bi_generation 0 bi_dev 0 bi_data_checksum 0 bi_compression 0 bi_project 0 bi_background_compression 0 bi_data_replicas 0 bi_promote_target 0 bi_foreground_target 0 bi_background_target 0 bi_erasure_code 0 bi_fields_set 0 bi_dir 1879048193 bi_dir_offset 3384856038735393365 bi_subvol 0 bi_parent_subvol 0 bi_nocow 0
    new u64s 19 type inode_v3 0:536925940:4294967283 len 0 ver 0: mode 100600 flags 15300000 journal_seq 467859 bi_size 0 bi_sectors 3559337304 bi_version 0 bi_atime 40905301656446 bi_ctime 40905301656446 bi_mtime 40905301656446 bi_otime 40905301656446 bi_uid 0 bi_gid 0 bi_nlink 0 bi_generation 0 bi_dev 0 bi_data_checksum 0 bi_compression 0 bi_project 0 bi_background_compression 0 bi_data_replicas 0 bi_promote_target 0 bi_foreground_target 0 bi_background_target 0 bi_erasure_code 0 bi_fields_set 0 bi_dir 1879048193 bi_dir_offset 3384856038735393365 bi_subvol 0 bi_parent_subvol 0 bi_nocow 0

Kernel panic - not syncing: bcachefs (e7fdc10e-54a3-49d9-bd0c-390370889d84): panic after error
CPU: 4 PID: 5154 Comm: rsync Not tainted 6.5.9-gateway-gca1614174cc0-dirty #1
Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X570 Phantom Gaming 4, BIOS P4.20 08/02/2021
Call Trace:
 <TASK>
 dump_stack_lvl+0x5a/0x90
 panic+0x105/0x300
 ? console_unlock+0xf1/0x130
 ? bch2_printbuf_exit+0x16/0x30
 ? srso_return_thunk+0x5/0x10
 bch2_inconsistent_error+0x6f/0x80
 bch2_trans_fs_usage_apply+0x279/0x3d0
 __bch2_trans_commit+0x112a/0x1df0
 ? bch2_extent_update+0x13a/0x1d0
 bch2_extent_update+0x13a/0x1d0
 bch2_extent_fallocate+0x58e/0x740
 bch2_fallocate_dispatch+0xb7c/0x1030
 ? do_filp_open+0xa0/0x140
 vfs_fallocate+0x18e/0x1d0
 __x64_sys_fallocate+0x46/0x70
 do_syscall_64+0x48/0xa0
 ? exit_to_user_mode_prepare+0x4d/0xa0
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7fc85d91bbb3
Code: 64 89 02 b8 ff ff ff ff eb bd 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 80 3d 31 da 0d 00 00 49 89 ca 74 14 b8 1d 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5d c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 10

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-10-27 17:19:31 -04:00
parent be9e782df3
commit df94cb2e57
3 changed files with 5 additions and 5 deletions
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4
fs/bcachefs/buckets.c
View file

@ -1322,7 +1322,7 @@ int bch2_trans_fs_usage_apply(struct btree_trans *trans,
struct bch_fs *c = trans->c;
static int warned_disk_usage = 0;
bool warn = false;
unsigned disk_res_sectors = trans->disk_res ? trans->disk_res->sectors : 0;
u64 disk_res_sectors = trans->disk_res ? trans->disk_res->sectors : 0;
struct replicas_delta *d, *d2;
struct replicas_delta *top = (void *) deltas->d + deltas->used;
struct bch_fs_usage *dst;
@ -1381,7 +1381,7 @@ int bch2_trans_fs_usage_apply(struct btree_trans *trans,
if (unlikely(warn) && !xchg(&warned_disk_usage, 1))
bch2_trans_inconsistent(trans,
"disk usage increased %lli more than %u sectors reserved)",
"disk usage increased %lli more than %llu sectors reserved)",
should_not_have_added, disk_res_sectors);
return 0;
need_mark:

4
fs/bcachefs/io_misc.c
View file

@ -23,7 +23,7 @@
int bch2_extent_fallocate(struct btree_trans *trans,
subvol_inum inum,
struct btree_iter *iter,
unsigned sectors,
u64 sectors,
struct bch_io_opts opts,
s64 *i_sectors_delta,
struct write_point_specifier write_point)
@ -105,7 +105,7 @@ int bch2_extent_fallocate(struct btree_trans *trans,
if (ret)
goto err;
sectors = min(sectors, wp->sectors_free);
sectors = min_t(u64, sectors, wp->sectors_free);
sectors_allocated = sectors;
bch2_key_resize(&e->k, sectors);

2
fs/bcachefs/io_misc.h
View file

@ -3,7 +3,7 @@
#define _BCACHEFS_IO_MISC_H
int bch2_extent_fallocate(struct btree_trans *, subvol_inum, struct btree_iter *,
unsigned, struct bch_io_opts, s64 *,
u64, struct bch_io_opts, s64 *,
struct write_point_specifier);
int bch2_fpunch_at(struct btree_trans *, struct btree_iter *,
subvol_inum, u64, s64 *);