Revision d6e621de1fceb3b098ebf435ef7ea91ec4838a1a authored by Phillip Lougher on 15 May 2021, 00:27:16 UTC, committed by Linus Torvalds on 15 May 2021, 02:41:32 UTC
Sysbot has reported a "divide error" which has been identified as being caused by a corrupted file_size value within the file inode. This value has been corrupted to a much larger value than expected. Calculate_skip() is passed i_size_read(inode) >> msblk->block_log. Due to the file_size value corruption this overflows the int argument/variable in that function, leading to the divide error. This patch changes the function to use u64. This will accommodate any unexpectedly large values due to corruption. The value returned from calculate_skip() is clamped to be never more than SQUASHFS_CACHED_BLKS - 1, or 7. So file_size corruption does not lead to an unexpectedly large return result here. Link: https://lkml.kernel.org/r/20210507152618.9447-1-phillip@squashfs.org.uk Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reported-by: <syzbot+e8f781243ce16ac2f962@syzkaller.appspotmail.com> Reported-by: <syzbot+7b98870d4fec9447b951@syzkaller.appspotmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
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bpf | ||
cgroup | ||
configs | ||
debug | ||
dma | ||
entry | ||
events | ||
gcov | ||
irq | ||
kcsan | ||
livepatch | ||
locking | ||
power | ||
printk | ||
rcu | ||
sched | ||
time | ||
trace | ||
.gitignore | -rw-r--r-- | 67 bytes |
Kconfig.freezer | -rw-r--r-- | 92 bytes |
Kconfig.hz | -rw-r--r-- | 1.7 KB |
Kconfig.locks | -rw-r--r-- | 4.9 KB |
Kconfig.preempt | -rw-r--r-- | 3.7 KB |
Makefile | -rw-r--r-- | 5.2 KB |
acct.c | -rw-r--r-- | 15.5 KB |
async.c | -rw-r--r-- | 9.3 KB |
audit.c | -rw-r--r-- | 63.5 KB |
audit.h | -rw-r--r-- | 10.4 KB |
audit_fsnotify.c | -rw-r--r-- | 5.2 KB |
audit_tree.c | -rw-r--r-- | 25.6 KB |
audit_watch.c | -rw-r--r-- | 13.7 KB |
auditfilter.c | -rw-r--r-- | 34.1 KB |
auditsc.c | -rw-r--r-- | 71.7 KB |
backtracetest.c | -rw-r--r-- | 1.9 KB |
bounds.c | -rw-r--r-- | 751 bytes |
capability.c | -rw-r--r-- | 14.8 KB |
cfi.c | -rw-r--r-- | 8.0 KB |
compat.c | -rw-r--r-- | 7.3 KB |
configs.c | -rw-r--r-- | 2.0 KB |
context_tracking.c | -rw-r--r-- | 6.4 KB |
cpu.c | -rw-r--r-- | 62.4 KB |
cpu_pm.c | -rw-r--r-- | 5.4 KB |
crash_core.c | -rw-r--r-- | 12.8 KB |
crash_dump.c | -rw-r--r-- | 1.1 KB |
cred.c | -rw-r--r-- | 23.3 KB |
delayacct.c | -rw-r--r-- | 4.7 KB |
dma.c | -rw-r--r-- | 3.3 KB |
exec_domain.c | -rw-r--r-- | 1.1 KB |
exit.c | -rw-r--r-- | 44.8 KB |
extable.c | -rw-r--r-- | 4.4 KB |
fail_function.c | -rw-r--r-- | 7.0 KB |
fork.c | -rw-r--r-- | 75.5 KB |
freezer.c | -rw-r--r-- | 4.4 KB |
futex.c | -rw-r--r-- | 109.0 KB |
gen_kheaders.sh | -rwxr-xr-x | 3.2 KB |
groups.c | -rw-r--r-- | 4.8 KB |
hung_task.c | -rw-r--r-- | 7.5 KB |
iomem.c | -rw-r--r-- | 4.7 KB |
irq_work.c | -rw-r--r-- | 5.0 KB |
jump_label.c | -rw-r--r-- | 21.2 KB |
kallsyms.c | -rw-r--r-- | 19.6 KB |
kcmp.c | -rw-r--r-- | 5.4 KB |
kcov.c | -rw-r--r-- | 27.7 KB |
kexec.c | -rw-r--r-- | 8.0 KB |
kexec_core.c | -rw-r--r-- | 31.2 KB |
kexec_elf.c | -rw-r--r-- | 11.4 KB |
kexec_file.c | -rw-r--r-- | 33.4 KB |
kexec_internal.h | -rw-r--r-- | 924 bytes |
kheaders.c | -rw-r--r-- | 1.6 KB |
kmod.c | -rw-r--r-- | 5.0 KB |
kprobes.c | -rw-r--r-- | 67.6 KB |
ksysfs.c | -rw-r--r-- | 6.3 KB |
kthread.c | -rw-r--r-- | 39.1 KB |
latencytop.c | -rw-r--r-- | 7.2 KB |
module-internal.h | -rw-r--r-- | 782 bytes |
module.c | -rw-r--r-- | 119.1 KB |
module_signature.c | -rw-r--r-- | 1.1 KB |
module_signing.c | -rw-r--r-- | 1.1 KB |
notifier.c | -rw-r--r-- | 16.3 KB |
nsproxy.c | -rw-r--r-- | 12.8 KB |
padata.c | -rw-r--r-- | 28.0 KB |
panic.c | -rw-r--r-- | 18.3 KB |
params.c | -rw-r--r-- | 22.7 KB |
pid.c | -rw-r--r-- | 17.0 KB |
pid_namespace.c | -rw-r--r-- | 11.2 KB |
profile.c | -rw-r--r-- | 14.8 KB |
ptrace.c | -rw-r--r-- | 37.4 KB |
range.c | -rw-r--r-- | 3.0 KB |
reboot.c | -rw-r--r-- | 18.9 KB |
regset.c | -rw-r--r-- | 1.9 KB |
relay.c | -rw-r--r-- | 30.0 KB |
resource.c | -rw-r--r-- | 48.1 KB |
resource_kunit.c | -rw-r--r-- | 4.3 KB |
rseq.c | -rw-r--r-- | 10.1 KB |
scftorture.c | -rw-r--r-- | 18.1 KB |
scs.c | -rw-r--r-- | 2.8 KB |
seccomp.c | -rw-r--r-- | 61.7 KB |
signal.c | -rw-r--r-- | 121.3 KB |
smp.c | -rw-r--r-- | 33.2 KB |
smpboot.c | -rw-r--r-- | 11.8 KB |
smpboot.h | -rw-r--r-- | 640 bytes |
softirq.c | -rw-r--r-- | 23.6 KB |
stackleak.c | -rw-r--r-- | 3.6 KB |
stacktrace.c | -rw-r--r-- | 9.6 KB |
static_call.c | -rw-r--r-- | 12.4 KB |
stop_machine.c | -rw-r--r-- | 17.8 KB |
sys.c | -rw-r--r-- | 63.5 KB |
sys_ni.c | -rw-r--r-- | 10.2 KB |
sysctl-test.c | -rw-r--r-- | 10.8 KB |
sysctl.c | -rw-r--r-- | 79.5 KB |
task_work.c | -rw-r--r-- | 4.6 KB |
taskstats.c | -rw-r--r-- | 15.2 KB |
test_kprobes.c | -rw-r--r-- | 5.9 KB |
torture.c | -rw-r--r-- | 25.3 KB |
tracepoint.c | -rw-r--r-- | 16.3 KB |
tsacct.c | -rw-r--r-- | 4.7 KB |
ucount.c | -rw-r--r-- | 5.7 KB |
uid16.c | -rw-r--r-- | 5.1 KB |
uid16.h | -rw-r--r-- | 442 bytes |
umh.c | -rw-r--r-- | 15.1 KB |
up.c | -rw-r--r-- | 1.5 KB |
user-return-notifier.c | -rw-r--r-- | 1.3 KB |
user.c | -rw-r--r-- | 5.5 KB |
user_namespace.c | -rw-r--r-- | 34.9 KB |
usermode_driver.c | -rw-r--r-- | 4.3 KB |
utsname.c | -rw-r--r-- | 3.8 KB |
utsname_sysctl.c | -rw-r--r-- | 3.2 KB |
watch_queue.c | -rw-r--r-- | 16.4 KB |
watchdog.c | -rw-r--r-- | 20.2 KB |
watchdog_hld.c | -rw-r--r-- | 7.7 KB |
workqueue.c | -rw-r--r-- | 166.2 KB |
workqueue_internal.h | -rw-r--r-- | 2.4 KB |
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