On Fri, Nov 27, 2015 at 10:47 AM, Toralf Förster <[email protected]> wrote: > Happened today few times in a row at a stable 64 bit Gentoo hardened system: > > > > Nov 27 10:23:09 t44 kernel: [41619.519921] PAX: size overflow detected in > function try_merge_map fs/btrfs/extent_map.c:238 cicus.107_102 max, count: > 13, decl: block_len; num: 0; context: extent_map; > Nov 27 10:23:09 t44 kernel: [41619.519929] CPU: 2 PID: 3361 Comm: > host_jskwgen Tainted: G W 4.2.6-hardened-r6 #3 > Nov 27 10:23:09 t44 kernel: [41619.519932] Hardware name: LENOVO > 20AQCTO1WW/20AQCTO1WW, BIOS GJET83WW (2.33 ) 03/09/2015 > Nov 27 10:23:09 t44 kernel: [41619.519934] ffffffff81831343 0000000000000000 > ffffffff8183132d ffffc9000298b6e8 > Nov 27 10:23:09 t44 kernel: [41619.519939] ffffffff815ee0ea ffff88033e30eec8 > ffffffff81831343 ffffc9000298b718 > Nov 27 10:23:09 t44 kernel: [41619.519943] ffffffff811ade1b ffff8802fb611480 > ffff88032b717510 ffff88032b74fae0 > Nov 27 10:23:09 t44 kernel: [41619.519946] Call Trace: > Nov 27 10:23:09 t44 kernel: [41619.519955] [<ffffffff815ee0ea>] > dump_stack+0x45/0x5d > Nov 27 10:23:09 t44 kernel: [41619.519959] [<ffffffff811ade1b>] > report_size_overflow+0x3b/0x50 > Nov 27 10:23:09 t44 kernel: [41619.519963] [<ffffffff8128c701>] > try_merge_map+0x1f1/0x310 > Nov 27 10:23:09 t44 kernel: [41619.519966] [<ffffffff8128ca82>] > add_extent_mapping+0x132/0x1c0 > Nov 27 10:23:09 t44 kernel: [41619.519968] [<ffffffff81273ea9>] > btrfs_get_extent+0x659/0xdd0 > Nov 27 10:23:09 t44 kernel: [41619.519972] [<ffffffff81197b72>] ? > kmem_cache_alloc+0x32/0x140 > Nov 27 10:23:09 t44 kernel: [41619.519975] [<ffffffff81297292>] > __do_readpage+0x6f2/0xc30 > Nov 27 10:23:09 t44 kernel: [41619.519977] [<ffffffff8129353e>] ? > __set_extent_bit+0x14e/0x580 > Nov 27 10:23:09 t44 kernel: [41619.519979] [<ffffffff81273850>] ? > btrfs_real_readdir+0x6f0/0x6f0 > Nov 27 10:23:09 t44 kernel: [41619.519983] [<ffffffff815f4869>] ? > _raw_spin_unlock_irq+0x19/0x30 > Nov 27 10:23:09 t44 kernel: [41619.519985] [<ffffffff81290e92>] ? > btrfs_lookup_ordered_extent+0xa2/0xe0 > Nov 27 10:23:09 t44 kernel: [41619.519987] [<ffffffff812979a6>] > __extent_read_full_page+0x1d6/0x210 > Nov 27 10:23:09 t44 kernel: [41619.519989] [<ffffffff81273850>] ? > btrfs_real_readdir+0x6f0/0x6f0 > Nov 27 10:23:09 t44 kernel: [41619.519991] [<ffffffff81273850>] ? > btrfs_real_readdir+0x6f0/0x6f0 > Nov 27 10:23:09 t44 kernel: [41619.519993] [<ffffffff812990bf>] > extent_read_full_page+0x4f/0x80 > Nov 27 10:23:09 t44 kernel: [41619.519997] [<ffffffff81155cf9>] ? > lru_cache_add+0x19/0x30 > Nov 27 10:23:09 t44 kernel: [41619.519999] [<ffffffff81270ac0>] ? > inode_tree_add+0x150/0x150 > Nov 27 10:23:09 t44 kernel: [41619.520000] [<ffffffff81270af4>] > btrfs_readpage+0x34/0x50 > Nov 27 10:23:09 t44 kernel: [41619.520002] [<ffffffff81270ac0>] ? > inode_tree_add+0x150/0x150 > Nov 27 10:23:09 t44 kernel: [41619.520004] [<ffffffff81147919>] > do_read_cache_page+0x99/0x1b0 > Nov 27 10:23:09 t44 kernel: [41619.520006] [<ffffffff81270ac0>] ? > inode_tree_add+0x150/0x150 > Nov 27 10:23:09 t44 kernel: [41619.520008] [<ffffffff81270ac0>] ? > inode_tree_add+0x150/0x150 > Nov 27 10:23:09 t44 kernel: [41619.520009] [<ffffffff81147a68>] > read_cache_page+0x38/0x50 > Nov 27 10:23:09 t44 kernel: [41619.520012] [<ffffffff811b4d4a>] > page_getlink.isra.48.constprop.51+0x3a/0xa0 > Nov 27 10:23:09 t44 kernel: [41619.520014] [<ffffffff811b4ddb>] > page_follow_link_light+0x2b/0x50 > Nov 27 10:23:09 t44 kernel: [41619.520016] [<ffffffff811b557f>] > trailing_symlink+0x27f/0x2b0 > Nov 27 10:23:09 t44 kernel: [41619.520019] [<ffffffff811b85db>] > path_openat+0x16b/0x1700 > Nov 27 10:23:09 t44 kernel: [41619.520021] [<ffffffff811bae21>] > do_filp_open+0x81/0xf0 > Nov 27 10:23:09 t44 kernel: [41619.520024] [<ffffffff811a4cc3>] > do_sys_open+0x133/0x280 > Nov 27 10:23:09 t44 kernel: [41619.520026] [<ffffffff811a4e41>] > SyS_open+0x31/0x50 > Nov 27 10:23:09 t44 kernel: [41619.520028] [<ffffffff815f5119>] > entry_SYSCALL_64_fastpath+0x12/0x83
Try the following (also pasted at https://friendpaste.com/5O6o1cqWqJZDIKrH1YqG7y): diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 6a98bdd..26b4c13 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -235,7 +235,8 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) em->start = merge->start; em->orig_start = merge->orig_start; em->len += merge->len; - em->block_len += merge->block_len; + if (em->block_start != EXTENT_MAP_HOLE) + em->block_len += merge->block_len; em->block_start = merge->block_start; em->mod_len = (em->mod_len + em->mod_start) - merge->mod_start; em->mod_start = merge->mod_start; @@ -252,7 +253,8 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) merge = rb_entry(rb, struct extent_map, rb_node); if (rb && mergable_maps(em, merge)) { em->len += merge->len; - em->block_len += merge->block_len; + if (em->block_start != EXTENT_MAP_HOLE) + em->block_len += merge->block_len; rb_erase(&merge->rb_node, &tree->map); RB_CLEAR_NODE(&merge->rb_node); em->mod_len = (merge->mod_start + merge->mod_len) - em->mod_start; > > > Furthermore neither login into the KDE screen saver nor login at the console > could be made, sys-rq keys didn't worked - power off was my friend. > > > > -- > Toralf, pgp: C4EACDDE 0076E94E > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Filipe David Manana, "Reasonable men adapt themselves to the world. Unreasonable men adapt the world to themselves. That's why all progress depends on unreasonable men." -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
