Hello, syzbot found the following issue on: HEAD commit: a79d5c76f705 Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10e54345c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=5666fa6aca264e42 dashboard link: https://syzkaller.appspot.com/bug?extid=9c656068e71c1b06dc1f compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/adf61ecd5810/disk-a79d5c76.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8192876ea15a/vmlinux-a79d5c76.xz kernel image: https://storage.googleapis.com/syzbot-assets/80c6e54ddbe7/bzImage-a79d5c76.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9c656068e71c1b06dc1f@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-use-after-free in iomap_finish_ioend+0x8a4/0x960 fs/iomap/buffered-io.c:1353 Read of size 8 at addr ffff88807925b090 by task kworker/1:0/22 CPU: 1 PID: 22 Comm: kworker/1:0 Not tainted 6.3.0-rc5-syzkaller-00202-ga79d5c76f705 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Workqueue: xfs-conv/loop2 xfs_end_io Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 iomap_finish_ioend+0x8a4/0x960 fs/iomap/buffered-io.c:1353 iomap_finish_ioends+0x1af/0x3a0 fs/iomap/buffered-io.c:1377 xfs_end_ioend+0x36e/0x4d0 fs/xfs/xfs_aops.c:136 xfs_end_io+0x2e5/0x370 fs/xfs/xfs_aops.c:173 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Allocated by task 12928: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x11f/0x2e0 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:2686 [inline] xfs_inode_alloc+0x88/0x6c0 fs/xfs/xfs_icache.c:81 xfs_iget_cache_miss fs/xfs/xfs_icache.c:585 [inline] xfs_iget+0xad2/0x2fd0 fs/xfs/xfs_icache.c:751 xfs_init_new_inode+0x1ca/0x10a0 fs/xfs/xfs_inode.c:815 xfs_create+0x8ce/0x1240 fs/xfs/xfs_inode.c:1023 xfs_generic_create+0x491/0xd70 fs/xfs/xfs_iops.c:199 lookup_open fs/namei.c:3416 [inline] open_last_lookups fs/namei.c:3484 [inline] path_openat+0x13df/0x3170 fs/namei.c:3712 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1375 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 15: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] kmem_cache_free+0x297/0x520 mm/slub.c:3809 rcu_do_batch kernel/rcu/tree.c:2112 [inline] rcu_core+0xa4d/0x16f0 kernel/rcu/tree.c:2372 __do_softirq+0x2ab/0x908 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2622 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2736 __xfs_inode_free fs/xfs/xfs_icache.c:161 [inline] xfs_reclaim_inode fs/xfs/xfs_icache.c:953 [inline] xfs_icwalk_process_inode fs/xfs/xfs_icache.c:1635 [inline] xfs_icwalk_ag+0x1366/0x1a60 fs/xfs/xfs_icache.c:1717 xfs_icwalk fs/xfs/xfs_icache.c:1766 [inline] xfs_reclaim_inodes+0x1f7/0x310 fs/xfs/xfs_icache.c:986 xfs_unmount_flush_inodes+0xaf/0xc0 fs/xfs/xfs_mount.c:594 xfs_unmountfs+0xc4/0x280 fs/xfs/xfs_mount.c:1071 xfs_fs_put_super+0x74/0x2d0 fs/xfs/xfs_super.c:1126 generic_shutdown_super+0x134/0x340 fs/super.c:500 kill_block_super+0x7e/0xe0 fs/super.c:1407 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 insert_work+0x54/0x3d0 kernel/workqueue.c:1361 __queue_work+0xb37/0xf10 kernel/workqueue.c:1524 queue_work_on+0x14f/0x250 kernel/workqueue.c:1552 queue_work include/linux/workqueue.h:504 [inline] xfs_end_bio+0xf6/0x1e0 fs/xfs/xfs_aops.c:188 req_bio_endio block/blk-mq.c:795 [inline] blk_update_request+0x4d7/0xfe0 block/blk-mq.c:927 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1054 blk_complete_reqs block/blk-mq.c:1132 [inline] blk_done_softirq+0xfc/0x150 block/blk-mq.c:1137 __do_softirq+0x2ab/0x908 kernel/softirq.c:571 The buggy address belongs to the object at ffff88807925ae80 which belongs to the cache xfs_inode of size 1808 The buggy address is located 528 bytes inside of freed 1808-byte region [ffff88807925ae80, ffff88807925b590) The buggy address belongs to the physical page: page:ffffea0001e49600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79258 head:ffffea0001e49600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888034708001 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888145f6e780 ffffea0000ecce00 dead000000000002 raw: 0000000000000000 0000000080100010 00000001ffffffff ffff888034708001 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 30191, tgid 30185 (syz-executor.2), ts 2829909820429, free_ts 2816156356992 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc_lru+0x1b9/0x2e0 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:2686 [inline] xfs_inode_alloc+0x88/0x6c0 fs/xfs/xfs_icache.c:81 xfs_iget_cache_miss fs/xfs/xfs_icache.c:585 [inline] xfs_iget+0xad2/0x2fd0 fs/xfs/xfs_icache.c:751 xfs_init_new_inode+0x1ca/0x10a0 fs/xfs/xfs_inode.c:815 xfs_symlink+0xb7b/0x1e80 fs/xfs/xfs_symlink.c:234 xfs_vn_symlink+0x1f5/0x740 fs/xfs/xfs_iops.c:419 vfs_symlink+0x12f/0x2a0 fs/namei.c:4398 do_symlinkat+0x201/0x610 fs/namei.c:4424 __do_sys_symlink fs/namei.c:4445 [inline] __se_sys_symlink fs/namei.c:4443 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4443 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3483 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476 getname_flags+0xbc/0x4e0 fs/namei.c:140 do_sys_openat2+0xd6/0x500 fs/open.c:1342 do_sys_open fs/open.c:1364 [inline] __do_sys_open fs/open.c:1372 [inline] __se_sys_open fs/open.c:1368 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807925af80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807925b000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807925b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807925b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807925b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This report is generated by a bot. 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