Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel I've stumbled on the following:
[ 1789.220942] kernel BUG at fs/f2fs/segment.h:543! [ 1789.220942] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 1789.220942] Dumping ftrace buffer: [ 1789.220942] (ftrace buffer empty) [ 1789.220942] Modules linked in: [ 1789.220942] CPU: 0 PID: 28161 Comm: trinity-c0 Not tainted 3.14.0-next-20140403-sasha-00019-g7474aa9-dirty #376 [ 1789.220942] task: ffff88032a598000 ti: ffff880329c3e000 task.ti: ffff880329c3e000 [ 1789.220942] RIP: f2fs_submit_page_mbio (fs/f2fs/segment.h:543 fs/f2fs/data.c:181) [ 1789.220942] RSP: 0018:ffff880329c3fc08 EFLAGS: 00010287 [ 1789.220942] RAX: 000000000000ffff RBX: ffff88012ac66a00 RCX: 0000000000000009 [ 1789.220942] RDX: 0000000000000200 RSI: ffffea0001dd92c0 RDI: ffff88012ac667b0 [ 1789.220942] RBP: ffff880329c3fc58 R08: 00000000000ba28e R09: ffff88032a598d98 [ 1789.220942] R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0001dd92c0 [ 1789.220942] R13: ffff88012ac667b0 R14: 0000000000000000 R15: ffff880329c3fc70 [ 1789.220942] FS: 00007f3599003700(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000 [ 1789.220942] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1789.220942] CR2: 00007faf4246a018 CR3: 0000000329b6f000 CR4: 00000000000006b0 [ 1789.220942] DR0: 0000000000696000 DR1: 0000000000696000 DR2: 0000000000000000 [ 1789.261947] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 [ 1789.261947] Stack: [ 1789.261947] ffff88032a598000 ffff880d2a478278 0000000000000006 0000000000000082 [ 1789.261947] ffffffffaa289475 ffffea0001dd92c0 ffff88012ac667b0 ffff880329c3fd30 [ 1789.261947] 0000000000000000 ffffea0001dd92c0 ffff880329c3fc88 ffffffffaa9da033 [ 1789.278327] Call Trace: [ 1789.278327] ? clear_page_dirty_for_io (arch/x86/include/asm/paravirt.h:809 include/linux/backing-dev.h:176 mm/page-writeback.c:2355) [ 1789.278327] write_meta_page (fs/f2fs/segment.c:922) [ 1789.278327] f2fs_write_meta_page (arch/x86/include/asm/atomic.h:103 fs/f2fs/f2fs.h:692 fs/f2fs/checkpoint.c:172) [ 1789.288220] trinity-c32: vm86 mode not supported on 64 bit kernel [ 1789.278327] sync_meta_pages (fs/f2fs/checkpoint.c:247) [ 1789.278327] ? get_parent_ip (kernel/sched/core.c:2472) [ 1789.278327] ? preempt_count_sub (kernel/sched/core.c:2527) [ 1789.278327] ? _raw_spin_unlock_irqrestore (arch/x86/include/asm/preempt.h:98 include/linux/spinlock_api_smp.h:161 kernel/locking/spinlock.c:191) [ 1789.278327] write_checkpoint (fs/f2fs/checkpoint.c:875 fs/f2fs/checkpoint.c:913) [ 1789.310911] waiting module removal not supported: please upgrade [ 1789.278327] ? SyS_tee (fs/sync.c:77) [ 1789.278327] ? mutex_lock_nested (arch/x86/include/asm/paravirt.h:809 kernel/locking/mutex.c:569 kernel/locking/mutex.c:587) [ 1789.278327] ? get_parent_ip (kernel/sched/core.c:2472) [ 1789.278327] ? bit_waitqueue (kernel/sched/wait.c:291) [ 1789.278327] ? SyS_tee (fs/sync.c:77) [ 1789.278327] f2fs_sync_fs (fs/f2fs/super.c:456) [ 1789.278327] sync_fs_one_sb (fs/sync.c:80) [ 1789.278327] iterate_supers (fs/super.c:512) [ 1789.278327] sys_sync (fs/sync.c:110) [ 1789.278327] tracesys (arch/x86/kernel/entry_64.S:749) [ 1789.278327] Code: 48 c1 e0 04 48 8d 9c 07 f0 00 00 00 49 8b 45 38 41 8b 8d d0 06 00 00 8b 50 78 8b 80 84 00 00 00 d3 e0 41 39 d6 8d 44 02 ff 73 09 <0f> 0b 0f 1f 80 00 00 00 00 41 39 c6 76 03 0f 0b 90 48 8d 43 20 [ 1789.278327] RIP f2fs_submit_page_mbio (fs/f2fs/segment.h:543 fs/f2fs/data.c:181) [ 1789.278327] RSP <ffff880329c3fc08> Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
