loop0: detected capacity change from 0 to 32768 gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS (format 1801)... gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents in 0ms gfs2: fsid=syz:syz.0: first mount done, others may mount syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=136, nr_sectors = 2 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=138, nr_sectors = 2 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=140, nr_sectors = 2 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=136, nr_sectors = 2 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=138, nr_sectors = 2 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=12288, sector=140, nr_sectors = 2 limit=0 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=18822, nr_sectors = 198 limit=0 loop0: writeback error on inode 9410, offset 0, sector 18822 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=19022, nr_sectors = 52 limit=0 loop0: writeback error on inode 9410, offset 101376, sector 19022 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=19076, nr_sectors = 250 limit=0 loop0: writeback error on inode 9410, offset 128000, sector 19076 syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=19328, nr_sectors = 250 limit=0 loop0: writeback error on inode 9410, offset 256000, sector 19328 loop0: writeback error on inode 9410, offset 384000, sector 19580 loop0: writeback error on inode 9410, offset 512000, sector 19832 loop0: writeback error on inode 9410, offset 640000, sector 20084 loop0: writeback error on inode 9410, offset 768000, sector 20336 loop0: writeback error on inode 9410, offset 896000, sector 20588 loop0: writeback error on inode 9410, offset 1024000, sector 20840 gfs2: fsid=syz:syz.0: Error -5 writing to journal, jid=0 ================================================================== BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline] BUG: KASAN: slab-use-after-free in gfs2_discard fs/gfs2/aops.c:593 [inline] BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x40b/0x750 fs/gfs2/aops.c:631 Read of size 8 at addr ffff88805255a168 by task syz.0.0/5362 CPU: 0 UID: 0 PID: 5362 Comm: syz.0.0 Not tainted 6.17.0-rc1-syzkaller-00016-g8742b2d8935f #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 list_empty include/linux/list.h:373 [inline] gfs2_discard fs/gfs2/aops.c:593 [inline] gfs2_invalidate_folio+0x40b/0x750 fs/gfs2/aops.c:631 folio_invalidate mm/truncate.c:140 [inline] truncate_cleanup_folio+0x2d5/0x430 mm/truncate.c:160 truncate_inode_pages_range+0x233/0xda0 mm/truncate.c:379 gfs2_evict_inode+0x87a/0x1000 fs/gfs2/super.c:1439 evict+0x504/0x9c0 fs/inode.c:810 gfs2_put_super+0x42b/0x950 fs/gfs2/super.c:617 generic_shutdown_super+0x135/0x2c0 fs/super.c:643 kill_block_super+0x44/0x90 fs/super.c:1766 deactivate_locked_super+0xb9/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378 task_work_run+0x1d4/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x6b5/0x2300 kernel/exit.c:961 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbccd98ebe9 Code: Unable to access opcode bytes at 0x7fbccd98ebbf. RSP: 002b:00007fbcce7d20e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fbccdbb5fa8 RCX: 00007fbccd98ebe9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbccdbb5fa8 RBP: 00007fbccdbb5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbccdbb6038 R14: 00007fff9de48ec0 R15: 00007fff9de48fa8 Allocated by task 5362: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:330 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4236 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_data+0x200/0x620 fs/gfs2/trans.c:209 gfs2_unstuffer_folio fs/gfs2/bmap.c:81 [inline] __gfs2_unstuff_inode fs/gfs2/bmap.c:119 [inline] gfs2_unstuff_dinode+0xb35/0x1320 fs/gfs2/bmap.c:166 gfs2_adjust_quota+0x219/0x800 fs/gfs2/quota.c:847 gfs2_set_dqblk+0x92a/0xbb0 fs/gfs2/quota.c:1787 quota_setquota+0x4b7/0x540 fs/quota/quota.c:310 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x279/0x950 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5362: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2417 [inline] slab_free mm/slub.c:4680 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4782 trans_drain fs/gfs2/log.c:1025 [inline] gfs2_log_flush+0x18df/0x24c0 fs/gfs2/log.c:1165 gfs2_kill_sb+0x5d/0x340 fs/gfs2/ops_fstype.c:1780 deactivate_locked_super+0xb9/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378 task_work_run+0x1d4/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x6b5/0x2300 kernel/exit.c:961 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805255a150 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of freed 80-byte region [ffff88805255a150, ffff88805255a1a0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5255a flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff888000c508c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000240024 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5362, tgid 5361 (syz.0.0), ts 85841915759, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2487 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2655 new_slab mm/slub.c:2709 [inline] ___slab_alloc+0xbeb/0x1410 mm/slub.c:3891 __slab_alloc mm/slub.c:3981 [inline] __slab_alloc_node mm/slub.c:4056 [inline] slab_alloc_node mm/slub.c:4217 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4236 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_meta+0x2cf/0xa10 fs/gfs2/trans.c:272 gfs2_alloc_extent fs/gfs2/rgrp.c:2237 [inline] gfs2_alloc_blocks+0x7a0/0x2080 fs/gfs2/rgrp.c:2447 __gfs2_unstuff_inode fs/gfs2/bmap.c:107 [inline] gfs2_unstuff_dinode+0x22b/0x1320 fs/gfs2/bmap.c:166 gfs2_adjust_quota+0x219/0x800 fs/gfs2/quota.c:847 gfs2_set_dqblk+0x92a/0xbb0 fs/gfs2/quota.c:1787 quota_setquota+0x4b7/0x540 fs/quota/quota.c:310 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x279/0x950 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page_owner free stack trace missing Memory state around the buggy address: ffff88805255a000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb ffff88805255a080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb >ffff88805255a100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb ^ ffff88805255a180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb ffff88805255a200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb ==================================================================