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bcachefs: Fix invalid shift in member_to_text()

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Reported-by: syzbot+064ce437a1ad63d3f6ef@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-10-11 22:06:58 -04:00
parent 7d84d9f449
commit c1bd21bb65
1 changed files with 9 additions and 1 deletions
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10
fs/bcachefs/sb-members.c
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@ -163,6 +163,11 @@ static int validate_member(struct printbuf *err,
return -BCH_ERR_invalid_sb_members;
}
if (m.btree_bitmap_shift >= 64) {
prt_printf(err, "device %u: invalid btree_bitmap_shift %u", i, m.btree_bitmap_shift);
return -BCH_ERR_invalid_sb_members;
}
return 0;
}
@ -247,7 +252,10 @@ static void member_to_text(struct printbuf *out,
prt_newline(out);
prt_printf(out, "Btree allocated bitmap blocksize:\t");
prt_units_u64(out, 1ULL << m.btree_bitmap_shift);
if (m.btree_bitmap_shift < 64)
prt_units_u64(out, 1ULL << m.btree_bitmap_shift);
else
prt_printf(out, "(invalid shift %u)", m.btree_bitmap_shift);
prt_newline(out);
prt_printf(out, "Btree allocated bitmap:\t");