On Tue, May 28, 2013 at 05:11:45PM +0200, Toralf Förster wrote:
> run into this today while fuzzying a stable Gentoo Linux image (chrooted)
> and kernel 3.10-rc3:
>
>
> [29118] [36] statfs64(pathname="/mnt/hostfs/v1/v2/f19735", sz=0x3fba7c8f) =
> -1 (Invalid argument)
> generic-sanitise.c:fill_arg:294 unreachable!
> [watchdog] pid 29096 hasn't made progress in 30 seconds! (last:1369753604
> now:1369753634 diff:30). Stuck in syscall 279:mq_timedsend. Sending SIGKILL.
> [28242] Random reseed: 504311294
>
>
> and later :
>
>
> [29123] [128] setdomainname(name=0, len=0) = -1 (Operation not permitted)
> [29123] [129] pread64(fd=12, buf=0x895a000[page_rand], count=4096, pos=16) =
> -1 (Is a directory)
> generic-sanitise.c:fill_arg:294 unreachable!
> [watchdog] pid 29118 hasn't made progress in 30 seconds! (last:1369753633
> now:1369753663 diff:30). Stuck in syscall 279:mq_timedsend. Sending SIGKILL.
> [28242] Random reseed: 1774374230
> [29133] [0] setresuid(ruid=0x8fffffff, euid=0x45009081, suid=0x67a8cbc6) =
> -1 (Operation not permitted)
>
>
>
> [29133] [31] acct(name=0) = -1 (Operation not permitted)
> [29133] [32] pipe2(fildes=4, flags=0x4000) = -1 (Bad address)
> generic-sanitise.c:fill_arg:294 unreachable!
> [watchdog] pid 29121 hasn't made progress in 30 seconds! (last:1369753635
> now:1369753665 diff:30). Stuck in syscall 279:mq_timedsend. Sending SIGKILL.
> [28242] Random reseed: 641723094
> [29143] [0] unlinkat(dfd=12, pathname="/mnt/hostfs/v1/v2/f19735",
> flag=0x74fe39d0) = -1 (Invalid argument)
>
>
> expected or rather a ToDo ?
unexpected. Very strange. Can you apply this, and see what it prints out ?
diff --git a/generic-sanitise.c b/generic-sanitise.c
index 0fb2f52..2232437 100644
--- a/generic-sanitise.c
+++ b/generic-sanitise.c
@@ -291,6 +291,9 @@ static unsigned long fill_arg(int childno, int call, int
argnum)
return mode;
default:
+ printf("name: %s\n", syscalls[call].entry->name);
+ printf("argnum: %d\n", argnum);
+ printf("argtype: %d\n", argtype);
BUG("unreachable!\n");
return 0;
}
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