Hello, syzbot found the following issue on: HEAD commit: e8c39d0f57f3 Merge tag 'probes-fixes-v6.9-rc3' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12ce66a3180000 kernel config: https://syzkaller.appspot.com/x/.config?x=285be8dd6baeb438 dashboard link: https://syzkaller.appspot.com/bug?extid=3a36aeabd31497d63f6e compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16892dcb180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=130547bd180000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-e8c39d0f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d33b002ae0bf/vmlinux-e8c39d0f.xz kernel image: https://storage.googleapis.com/syzbot-assets/047d0bfb2db7/bzImage-e8c39d0f.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/749aec76707a/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3a36aeabd31497d63f6e@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== 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:617 [inline] BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x718/0x820 fs/gfs2/aops.c:655 Read of size 8 at addr ffff88801db08168 by task syz-executor595/5186 CPU: 3 PID: 5186 Comm: syz-executor595 Not tainted 6.9.0-rc3-syzkaller-00073-ge8c39d0f57f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 list_empty include/linux/list.h:373 [inline] gfs2_discard fs/gfs2/aops.c:617 [inline] gfs2_invalidate_folio+0x718/0x820 fs/gfs2/aops.c:655 folio_invalidate mm/truncate.c:158 [inline] truncate_cleanup_folio+0x2ac/0x3e0 mm/truncate.c:178 truncate_inode_pages_range+0x271/0xe90 mm/truncate.c:358 gfs2_evict_inode+0x75b/0x1460 fs/gfs2/super.c:1508 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 gfs2_put_super+0x2bd/0x760 fs/gfs2/super.c:625 generic_shutdown_super+0x159/0x3d0 fs/super.c:641 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2c10 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe708777789 Code: Unable to access opcode bytes at 0x7fe70877775f. RSP: 002b:00007ffd15e3f838 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe708777789 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007fe7088122b0 R08: ffffffffffffffb8 R09: 000000000001f6db R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe7088122b0 R13: 0000000000000000 R14: 00007fe708813020 R15: 00007fe708745cc0 </TASK> Allocated by task 5186: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_data+0x4b3/0x7f0 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+0xad9/0x1460 fs/gfs2/bmap.c:166 gfs2_adjust_quota+0x124/0xb10 fs/gfs2/quota.c:879 do_sync+0xa73/0xd30 fs/gfs2/quota.c:990 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2c10 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5186: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x12e/0x380 mm/slub.c:4344 trans_drain fs/gfs2/log.c:1028 [inline] gfs2_log_flush+0x1486/0x29b0 fs/gfs2/log.c:1167 do_sync+0x550/0xd30 fs/gfs2/quota.c:1010 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa7d/0x2c10 kernel/exit.c:878 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801db08150 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of freed 80-byte region [ffff88801db08150, ffff88801db081a0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1db08 flags: 0xfff80000000800(slab|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000800 ffff88801a5aedc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080240024 00000001ffffffff 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 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 5186, tgid 5186 (syz-executor595), ts 45296183443, free_ts 44935801807 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_meta+0xade/0xf50 fs/gfs2/trans.c:251 gfs2_alloc_extent fs/gfs2/rgrp.c:2239 [inline] gfs2_alloc_blocks+0x46c/0x19c0 fs/gfs2/rgrp.c:2449 __gfs2_unstuff_inode fs/gfs2/bmap.c:107 [inline] gfs2_unstuff_dinode+0x499/0x1460 fs/gfs2/bmap.c:166 gfs2_adjust_quota+0x124/0xb10 fs/gfs2/quota.c:879 do_sync+0xa73/0xd30 fs/gfs2/quota.c:990 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 page last free pid 4684 tgid 4684 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 __put_partials+0x14c/0x170 mm/slub.c:2906 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9b/0xf0 include/linux/audit.h:322 vfs_fstatat+0x9a/0x150 fs/stat.c:303 __do_sys_newfstatat+0x98/0x120 fs/stat.c:468 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88801db08000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb ffff88801db08080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb >ffff88801db08100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb ^ ffff88801db08180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb ffff88801db08200: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
