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. ======================================================= ocfs2: Slot 0 on device (7,0) was already allocated to this node! ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ================================================================== BUG: KASAN: slab-out-of-bounds in ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline] BUG: KASAN: slab-out-of-bounds in ocfs2_claim_suballoc_bits+0x1099/0x2560 fs/ocfs2/suballoc.c:1982 Read of size 4 at addr ffff888043578610 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted 6.14.0-rc4-syzkaller-00199-g76544811c850 #0 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 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1445 [inline] ocfs2_claim_suballoc_bits+0x1099/0x2560 fs/ocfs2/suballoc.c:1982 __ocfs2_claim_clusters+0x332/0xa40 fs/ocfs2/suballoc.c:2395 ocfs2_local_alloc_new_window fs/ocfs2/localalloc.c:1166 [inline] ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1295 [inline] ocfs2_reserve_local_alloc_bits+0x146b/0x28d0 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x1b8/0xb60 fs/ocfs2/suballoc.c:1166 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1227 [inline] ocfs2_lock_allocators+0x30a/0x630 fs/ocfs2/suballoc.c:2746 ocfs2_write_begin_nolock+0x28fe/0x4e40 fs/ocfs2/aops.c:1725 ocfs2_write_begin+0x205/0x3a0 fs/ocfs2/aops.c:1889 generic_perform_write+0x346/0x990 mm/filemap.c:4189 ocfs2_file_write_iter+0x19af/0x2180 fs/ocfs2/file.c:2469 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xacf/0xd10 fs/read_write.c:679 ksys_write+0x18f/0x2b0 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7981f8d169 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:00007f7982ea1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f79821a5fa0 RCX: 00007f7981f8d169 RDX: 000000000208e24b RSI: 0000400000000040 RDI: 0000000000000006 RBP: 00007f798200e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f79821a5fa0 R15: 00007ffc89838868 Allocated by task 4728: 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:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4183 shmem_alloc_inode+0x28/0x40 mm/shmem.c:5137 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 __shmem_get_inode mm/shmem.c:3035 [inline] shmem_get_inode+0x39d/0xf20 mm/shmem.c:3109 shmem_symlink+0x12c/0x610 mm/shmem.c:4084 vfs_symlink+0x137/0x2e0 fs/namei.c:4671 do_symlinkat+0x222/0x3a0 fs/namei.c:4697 __do_sys_symlink fs/namei.c:4718 [inline] __se_sys_symlink fs/namei.c:4716 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4716 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888043578000 which belongs to the cache shmem_inode_cache of size 1544 The buggy address is located 8 bytes to the right of allocated 1544-byte region [ffff888043578000, ffff888043578608) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888043579a20 pfn:0x43578 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000240 ffff88801c6e7280 ffffea0000fcac10 ffff88803040aac8 raw: ffff888043579a20 0000000000130011 00000000f5000000 0000000000000000 head: 04fff00000000240 ffff88801c6e7280 ffffea0000fcac10 ffff88803040aac8 head: ffff888043579a20 0000000000130011 00000000f5000000 0000000000000000 head: 04fff00000000003 ffffea00010d5e01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4728, tgid 4728 (udevd), ts 36513865124, free_ts 36497487773 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_lru_noprof+0x26c/0x390 mm/slub.c:4183 shmem_alloc_inode+0x28/0x40 mm/shmem.c:5137 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 __shmem_get_inode mm/shmem.c:3035 [inline] shmem_get_inode+0x39d/0xf20 mm/shmem.c:3109 shmem_symlink+0x12c/0x610 mm/shmem.c:4084 vfs_symlink+0x137/0x2e0 fs/namei.c:4671 do_symlinkat+0x222/0x3a0 fs/namei.c:4697 __do_sys_symlink fs/namei.c:4718 [inline] __se_sys_symlink fs/namei.c:4716 [inline] __x64_sys_symlink+0x7a/0x90 fs/namei.c:4716 page last free pid 4731 tgid 4731 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 discard_slab mm/slub.c:2684 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3153 put_cpu_partial+0x17c/0x250 mm/slub.c:3228 __slab_free+0x290/0x380 mm/slub.c:4479 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:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 getname_flags+0xb7/0x540 fs/namei.c:139 do_sys_openat2+0xd2/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1443 [inline] __do_sys_openat fs/open.c:1459 [inline] __se_sys_openat fs/open.c:1454 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1454 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888043578500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888043578580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888043578600: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888043578680: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888043578700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================