OK, bisectable, 3.13 good, 3.19 bad. Test is simple, build the following
and run in a chroot on a btrfs system and it will trip the same bug.
#define _GNU_SOURCE
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(void)
{
char buffer[1024] = { 0 };
int fd;
fd = open("test", O_CREAT | O_RDWR, 0777);
if (fd < 0)
return 1;
(void)write(fd, buffer, sizeof(buffer));
fsync(fd);
(void)close(fd);
return 0;
}
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https://bugs.launchpad.net/bugs/1532145
Title:
Kernel Panic wrt btrfs while sbuild/schroot
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