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Code Issues Releases Wiki Activity

bcachefs: Fix stack corruption 

A bkey_on_stack_realloc() call was in the wrong place, and broken for
indirect extents

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-10-27 14:10:52 -04:00 committed by Kent Overstreet
parent 8cad3e2f73
commit 527087c741
1 changed files with 2 additions and 3 deletions
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5
fs/bcachefs/fs.c
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@ -921,9 +921,7 @@ retry:
bkey_start_offset(k.k);
sectors = k.k->size - offset_into_extent;
bkey_on_stack_realloc(&cur, c, k.k->u64s);
bkey_on_stack_realloc(&prev, c, k.k->u64s);
bkey_reassemble(cur.k, k);
bkey_on_stack_reassemble(&cur, c, k);
ret = bch2_read_indirect_extent(&trans,
&offset_into_extent, &cur);
@ -931,6 +929,7 @@ retry:
break;
k = bkey_i_to_s_c(cur.k);
bkey_on_stack_realloc(&prev, c, k.k->u64s);
sectors = min(sectors, k.k->size - offset_into_extent);