loop0: detected capacity change from 0 to 32768 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= JFS: metapage_get_blocks failed ERROR: (device loop0): release_metapage: metapage_write_one() failed ERROR: (device loop0): remounting filesystem as read-only ================================================================== BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:229 [inline] BUG: KASAN: slab-use-after-free in release_metapage+0x746/0xa90 fs/jfs/jfs_metapage.c:784 Read of size 8 at addr ffff888043ba9eb0 by task syz.0.0/5324 CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-11270-g08733088b566 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 drop_metapage fs/jfs/jfs_metapage.c:229 [inline] release_metapage+0x746/0xa90 fs/jfs/jfs_metapage.c:784 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_write+0x693/0xe50 fs/jfs/xattr.c:280 ea_put fs/jfs/xattr.c:626 [inline] __jfs_setxattr+0xa05/0x1360 fs/jfs/xattr.c:792 __jfs_set_acl+0x12a/0x1b0 fs/jfs/acl.c:87 jfs_set_acl+0x2be/0x4d0 fs/jfs/acl.c:115 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x806/0xa70 fs/posix_acl.c:1133 do_set_acl+0xf4/0x180 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x355/0x480 fs/xattr.c:665 path_setxattrat+0x3f7/0x4c0 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8162d8d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8163bcb038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f8162fa5fa0 RCX: 00007f8162d8d169 RDX: 0000200000000380 RSI: 0000200000000280 RDI: 0000200000000240 RBP: 00007f8162e0e2a0 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000024 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8162fa5fa0 R15: 00007fff198fb428 Allocated by task 5324: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4138 [inline] slab_alloc_node mm/slub.c:4187 [inline] kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4194 mempool_alloc_noprof+0x199/0x5a0 mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x5f4/0xdc0 fs/jfs/jfs_metapage.c:652 ea_write+0x620/0xe50 fs/jfs/xattr.c:256 ea_put fs/jfs/xattr.c:626 [inline] __jfs_setxattr+0xa05/0x1360 fs/jfs/xattr.c:792 __jfs_set_acl+0x12a/0x1b0 fs/jfs/acl.c:87 jfs_set_acl+0x2be/0x4d0 fs/jfs/acl.c:115 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x806/0xa70 fs/posix_acl.c:1133 do_set_acl+0xf4/0x180 fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x355/0x480 fs/xattr.c:665 path_setxattrat+0x3f7/0x4c0 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5328: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2376 [inline] slab_free mm/slub.c:4633 [inline] kmem_cache_free+0x197/0x410 mm/slub.c:4735 free_metapage fs/jfs/jfs_metapage.c:197 [inline] metapage_release_folio+0x412/0x540 fs/jfs/jfs_metapage.c:552 folio_invalidate mm/truncate.c:126 [inline] truncate_cleanup_folio+0x203/0x300 mm/truncate.c:146 truncate_inode_folio mm/truncate.c:161 [inline] truncate_inode_pages_range+0xcd4/0x10e0 mm/truncate.c:383 jfs_reconfigure+0x5ef/0x9d0 fs/jfs/super.c:406 reconfigure_super+0x43a/0x870 fs/super.c:1083 vfs_cmd_reconfigure fs/fsopen.c:262 [inline] vfs_fsconfig_locked fs/fsopen.c:291 [inline] __do_sys_fsconfig fs/fsopen.c:467 [inline] __se_sys_fsconfig+0xb5e/0xf40 fs/fsopen.c:344 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888043ba9e88 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff888043ba9e88, ffff888043ba9f40) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43ba9 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801f61bb40 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5324, tgid 5323 (syz.0.0), ts 80010158591, free_ts 79815367795 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1585 prep_new_page mm/page_alloc.c:1593 [inline] get_page_from_freelist+0x3ac1/0x3c60 mm/page_alloc.c:3538 __alloc_frozen_pages_noprof+0x266/0x580 mm/page_alloc.c:4806 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2446 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2610 new_slab mm/slub.c:2663 [inline] ___slab_alloc+0xc3b/0x1500 mm/slub.c:3849 __slab_alloc+0x58/0xa0 mm/slub.c:3939 __slab_alloc_node mm/slub.c:4014 [inline] slab_alloc_node mm/slub.c:4175 [inline] kmem_cache_alloc_noprof+0x270/0x390 mm/slub.c:4194 mempool_alloc_noprof+0x199/0x5a0 mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x5f4/0xdc0 fs/jfs/jfs_metapage.c:652 diReadSpecial+0x25d/0x720 fs/jfs/jfs_imap.c:447 jfs_mount+0x75/0x830 fs/jfs/jfs_mount.c:87 jfs_fill_super+0x6b9/0xd90 fs/jfs/super.c:523 get_tree_bdev_flags+0x490/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1759 do_new_mount+0x2cf/0xb70 fs/namespace.c:3878 page last free pid 1037 tgid 1037 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1130 [inline] __free_frozen_pages+0xd85/0x1030 mm/page_alloc.c:2707 discard_slab mm/slub.c:2707 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3176 put_cpu_partial+0x17e/0x250 mm/slub.c:3251 __slab_free+0x294/0x390 mm/slub.c:4503 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4138 [inline] slab_alloc_node mm/slub.c:4187 [inline] kmem_cache_alloc_node_noprof+0x1f2/0x3b0 mm/slub.c:4239 __alloc_skb+0x1c2/0x480 net/core/skbuff.c:658 alloc_skb include/linux/skbuff.h:1340 [inline] mld_newpack+0x176/0xc70 net/ipv6/mcast.c:1788 add_grhead net/ipv6/mcast.c:1899 [inline] add_grec+0x1495/0x19a0 net/ipv6/mcast.c:2037 mld_send_initial_cr+0x228/0x4b0 net/ipv6/mcast.c:2282 ipv6_mc_dad_complete+0x88/0x490 net/ipv6/mcast.c:2293 addrconf_dad_completed+0x714/0xcd0 net/ipv6/addrconf.c:4336 addrconf_dad_work+0xdbe/0x16a0 net/ipv6/addrconf.c:-1 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 Memory state around the buggy address: ffff888043ba9d80: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888043ba9e00: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc >ffff888043ba9e80: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888043ba9f00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888043ba9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================