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:311 [inline] BUG: KASAN: slab-use-after-free in release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:892 Read of size 8 at addr ffff888019e7f028 by task syz.0.0/5324 CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted syzkaller #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_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 drop_metapage fs/jfs/jfs_metapage.c:311 [inline] release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:892 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_put fs/jfs/xattr.c:623 [inline] __jfs_setxattr+0xa6e/0x1120 fs/jfs/xattr.c:792 __jfs_xattr_set+0xda/0x170 fs/jfs/xattr.c:941 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x274/0x600 fs/xattr.c:665 path_setxattrat+0x364/0x3a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff92958efc9 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:00007ff92a38b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007ff9297e5fa0 RCX: 00007ff92958efc9 RDX: 0000000000000000 RSI: 0000200000000300 RDI: 00002000000002c0 RBP: 00007ff929611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff9297e6038 R14: 00007ff9297e5fa0 R15: 00007fffe55d3d08 Allocated by task 5324: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4970 [inline] slab_alloc_node mm/slub.c:5280 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5287 mempool_alloc_noprof+0x1a7/0x510 mm/mempool.c:406 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline] __get_metapage+0x509/0xde0 fs/jfs/jfs_metapage.c:760 ea_get+0xb8e/0x1330 fs/jfs/xattr.c:528 __jfs_setxattr+0x57c/0x1120 fs/jfs/xattr.c:727 __jfs_xattr_set+0xda/0x170 fs/jfs/xattr.c:941 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x274/0x600 fs/xattr.c:665 path_setxattrat+0x364/0x3a0 fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 79: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2539 [inline] slab_free mm/slub.c:6630 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6740 free_metapage fs/jfs/jfs_metapage.c:279 [inline] metapage_release_folio+0x40e/0x540 fs/jfs/jfs_metapage.c:636 shrink_folio_list+0x20ac/0x4c70 mm/vmscan.c:1519 evict_folios+0x471e/0x57c0 mm/vmscan.c:4745 try_to_shrink_lruvec+0x8a3/0xb50 mm/vmscan.c:4908 shrink_one+0x21b/0x7c0 mm/vmscan.c:4953 shrink_many mm/vmscan.c:5016 [inline] lru_gen_shrink_node mm/vmscan.c:5094 [inline] shrink_node+0x315d/0x3780 mm/vmscan.c:6081 kswapd_shrink_node mm/vmscan.c:6941 [inline] balance_pgdat mm/vmscan.c:7124 [inline] kswapd+0x147c/0x2800 mm/vmscan.c:7389 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888019e7f000 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff888019e7f000, ffff888019e7f0b8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e7f flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801facec80 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 69022038475, free_ts 68631144110 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3055 [inline] allocate_slab+0x96/0x350 mm/slub.c:3228 new_slab mm/slub.c:3282 [inline] ___slab_alloc+0xe94/0x18a0 mm/slub.c:4651 __slab_alloc+0x65/0x100 mm/slub.c:4770 __slab_alloc_node mm/slub.c:4846 [inline] slab_alloc_node mm/slub.c:5268 [inline] kmem_cache_alloc_noprof+0x3f9/0x6e0 mm/slub.c:5287 mempool_alloc_noprof+0x1a7/0x510 mm/mempool.c:406 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline] __get_metapage+0x509/0xde0 fs/jfs/jfs_metapage.c:760 ea_get+0xb8e/0x1330 fs/jfs/xattr.c:528 __jfs_setxattr+0x57c/0x1120 fs/jfs/xattr.c:727 __jfs_xattr_set+0xda/0x170 fs/jfs/xattr.c:941 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321 page last free pid 79 tgid 79 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:2963 shrink_folio_list+0x295e/0x4c70 mm/vmscan.c:1569 evict_folios+0x471e/0x57c0 mm/vmscan.c:4745 try_to_shrink_lruvec+0x8a3/0xb50 mm/vmscan.c:4908 shrink_one+0x21b/0x7c0 mm/vmscan.c:4953 shrink_many mm/vmscan.c:5016 [inline] lru_gen_shrink_node mm/vmscan.c:5094 [inline] shrink_node+0x315d/0x3780 mm/vmscan.c:6081 kswapd_shrink_node mm/vmscan.c:6941 [inline] balance_pgdat mm/vmscan.c:7124 [inline] kswapd+0x147c/0x2800 mm/vmscan.c:7389 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888019e7ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888019e7ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888019e7f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888019e7f080: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff888019e7f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================