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authorDmitry Monakhov <dmonakhov@openvz.org>2013-03-02 17:08:46 -0500
committerTheodore Ts'o <tytso@mit.edu>2013-03-02 17:08:46 -0500
commitdf05c1b85a88888b92725ef27ba70086f38fb083 (patch)
treeba25e9388be51f30fd464eea4c6f4f50eb384080 /fs
parent1ac6466f253ef7bd063b7877fb056afe1820841c (diff)
downloadlinux-stericsson-df05c1b85a88888b92725ef27ba70086f38fb083.tar.gz
jbd2: fix ERR_PTR dereference in jbd2__journal_start
If start_this_handle() failed handle will be initialized to ERR_PTR() and can not be dereferenced. paging request at fffffffffffffff6 IP: [<ffffffff813c073f>] jbd2__journal_start+0x18f/0x290 PGD 200e067 PUD 200f067 PMD 0 Oops: 0000 [#1] SMP Modules linked in: cpufreq_ondemand acpi_cpufreq freq_table mperf coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode sg xhci_hcd button sd_mod crc_t10dif aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul ahci libahci pata_acpi ata_generic dm_mirror dm_region_hash dm_log dm_mod CPU 0 journal commit I/O error Pid: 2694, comm: fio Not tainted 3.8.0-rc3+ #79 /DQ67SW RIP: 0010:[<ffffffff813c073f>] [<ffffffff813c073f>] jbd2__journal_start+0x18f/0x290 RSP: 0018:ffff880233b8ba58 EFLAGS: 00010292 RAX: 00000000ffffffe2 RBX: ffffffffffffffe2 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff82128f48 RBP: ffff880233b8ba98 R08: 0000000000000000 R09: ffff88021440a6e0 Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
-rw-r--r--fs/jbd2/transaction.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index b7e2385c6e92..d6ee5aed56b1 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -382,7 +382,7 @@ handle_t *jbd2__journal_start(journal_t *journal, int nblocks, gfp_t gfp_mask,
if (err < 0) {
jbd2_free_handle(handle);
current->journal_info = NULL;
- handle = ERR_PTR(err);
+ return ERR_PTR(err);
}
handle->h_type = type;
handle->h_line_no = line_no;