Hello, syzbot found the following issue on:
HEAD commit: f83a4f2a4d8c Merge tag 'erofs-for-6.17-rc6-fixes' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16830762580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bf99f2510ef92ba5 dashboard link: https://syzkaller.appspot.com/bug?extid=3686758660f980b402dc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f83a4f2a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3e6c4d9a21b6/vmlinux-f83a4f2a.xz kernel image: https://storage.googleapis.com/syzbot-assets/7bbbc8ebb9ba/bzImage-f83a4f2a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3686758660f980b40...@syzkaller.appspotmail.com page: refcount:2 mapcount:0 mapping:ffff888043b30220 index:0x1201 pfn:0x1145b memcg:ffff88801c6a8d00 aops:f2fs_meta_aops ino:2 flags: 0xfff200000000a9(locked|waiters|uptodate|lru|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff200000000a9 ffffea00006927c8 ffffea0000472b08 ffff888043b30220 raw: 0000000000001201 0000000000000000 00000002ffffffff ffff88801c6a8d00 page dumped because: VM_BUG_ON_FOLIO(success && folio_test_uptodate(folio)) page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x40c40(GFP_NOFS|__GFP_COMP), pid 5369, tgid 5367 (syz.0.0), ts 88439663476, free_ts 88354226936 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_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507 folio_alloc_noprof+0x1e/0x30 mm/mempolicy.c:2517 filemap_alloc_folio_noprof+0xdf/0x470 mm/filemap.c:1007 __filemap_get_folio+0x3f2/0xaf0 mm/filemap.c:1981 pagecache_get_page+0x2a/0x130 mm/folio-compat.c:81 f2fs_pagecache_get_page fs/f2fs/f2fs.h:2908 [inline] ra_data_block+0x505/0xc90 fs/f2fs/gc.c:1266 gc_data_segment fs/f2fs/gc.c:1630 [inline] do_garbage_collect+0x2f1f/0x6410 fs/f2fs/gc.c:1826 f2fs_gc+0xc87/0x2590 fs/f2fs/gc.c:1931 f2fs_balance_fs+0x5f7/0x7f0 fs/f2fs/segment.c:466 f2fs_write_single_data_page+0xfaf/0x16a0 fs/f2fs/data.c:2906 f2fs_write_cache_pages fs/f2fs/data.c:3141 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3290 [inline] f2fs_write_data_pages+0x195b/0x3000 fs/f2fs/data.c:3317 do_writepages+0x32b/0x550 mm/page-writeback.c:2634 page last free pid 4841 tgid 4841 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 __slab_free+0x303/0x3c0 mm/slub.c:4606 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4191 [inline] slab_alloc_node mm/slub.c:4240 [inline] __kmalloc_cache_noprof+0x1be/0x3d0 mm/slub.c:4402 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline] nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline] nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline] nsim_fib_event_work+0x1174/0x3180 drivers/net/netdevsim/fib.c:1493 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1525! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 3024 Comm: kworker/u4:11 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 Workqueue: loop0 loop_workfn RIP: 0010:folio_end_read+0x22e/0x230 mm/filemap.c:1525 Code: a5 c7 ff 48 89 df 48 c7 c6 c0 4f b4 8b e8 aa d3 2f ff 90 0f 0b e8 d2 a5 c7 ff 48 89 df 48 c7 c6 20 48 b4 8b e8 93 d3 2f ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa RSP: 0018:ffffc9000daa7328 EFLAGS: 00010246 RAX: 914fe16334449200 RBX: ffffea00004516c0 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8dbbcae2 RDI: 00000000ffffffff RBP: 0000000000000001 R08: ffffffff8fc3c537 R09: 1ffffffff1f878a6 R10: dffffc0000000000 R11: fffffbfff1f878a7 R12: 1ffffd400008a2d9 R13: 1ffffd400008a2d8 R14: ffffea00004516c8 R15: 0000000000000008 FS: 0000000000000000(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200001000000 CR3: 0000000011f6e000 CR4: 0000000000352ef0 Call Trace: <TASK> f2fs_finish_read_bio+0x2e1/0x3e0 fs/f2fs/data.c:154 f2fs_read_end_io+0x360/0x980 fs/f2fs/data.c:-1 blk_update_request+0x57e/0xe60 block/blk-mq.c:989 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1151 lo_rw_aio_complete drivers/block/loop.c:337 [inline] lo_rw_aio+0xd75/0xfa0 drivers/block/loop.c:411 do_req_filebacked drivers/block/loop.c:-1 [inline] loop_handle_cmd drivers/block/loop.c:1919 [inline] loop_process_work+0x835/0xf90 drivers/block/loop.c:1954 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_end_read+0x22e/0x230 mm/filemap.c:1525 Code: a5 c7 ff 48 89 df 48 c7 c6 c0 4f b4 8b e8 aa d3 2f ff 90 0f 0b e8 d2 a5 c7 ff 48 89 df 48 c7 c6 20 48 b4 8b e8 93 d3 2f ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa RSP: 0018:ffffc9000daa7328 EFLAGS: 00010246 RAX: 914fe16334449200 RBX: ffffea00004516c0 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8dbbcae2 RDI: 00000000ffffffff RBP: 0000000000000001 R08: ffffffff8fc3c537 R09: 1ffffffff1f878a6 R10: dffffc0000000000 R11: fffffbfff1f878a7 R12: 1ffffd400008a2d9 R13: 1ffffd400008a2d8 R14: ffffea00004516c8 R15: 0000000000000008 FS: 0000000000000000(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200001000000 CR3: 00000000114b2000 CR4: 0000000000352ef0 --- 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 syzkal...@googlegroups.com. 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 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 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
