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bh=nyaB5Rpu8CF5SAQPjrZeUJKclfgjkHJDmq3B0+cL4ao=; b=P nBXO2jkPT1I6EeC5bcJiACJFdvbYOPCVdGrKidEfYQp1dY+FTDzGPT2DINmelFhYjPrF3tHxSBoQ8 nV0FhyIdFH96Nre8ytE3IYOXK4sFxn7hLbZnCOeQk0Ef5cn4sK96jp3X5c2IgaUIYLwKkpXf4fMYS jLE/wYWEfem0BISw=; Received: from mail-il1-f208.google.com ([209.85.166.208]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.95) id 1sIeJv-0008MO-Fq for linux-f2fs-devel@lists.sourceforge.net; Sun, 16 Jun 2024 01:04:35 +0000 Received: by mail-il1-f208.google.com with SMTP id e9e14a558f8ab-375beb12e67so33064075ab.3 for ; Sat, 15 Jun 2024 18:04:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718499864; x=1719104664; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nyaB5Rpu8CF5SAQPjrZeUJKclfgjkHJDmq3B0+cL4ao=; b=artfYmWPBHde3rfgUzd1Pv/SCkIhmQCI9lz5Eodb4zV/MQz+QC3r6zGZV3bU1b6NTo cdBB+O0T+MXPReKKSN3DiTQV+uktkO1tHCDDRxk3U0/+aBIpt/uP7JNrtn6gxd7uo4Q1 twt0w2zGfg5mnR/1d0E2GHOnRycpNzp5lNdbrMUC6u6/9TSnIJRcKtoIZQnkTMALVSjt Dp4tJAHvKuQch5YSx6M07s4Xtf7d/soycF54kIYiBq5SXwp7bS2jRfdHKxFQicvt836x LxYcbBWL7hr/mQYHQYJ4Qgbyw7vfR1vHHpxzEqJvTdDQsYl7tV7DTmiXcGAFx/kBeSgh MVhQ== X-Forwarded-Encrypted: i=1; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Hello, syzbot found the following issue on: HEAD commit: 2ccbdf43d5e7 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16a5b7ee980000 kernel config: https://syzkaller.appspot.com/x/.config?x=81c0d76ceef02b39 dashboard link: https://syzkaller.appspot.com/bug?extid=9a18f6f681a8e79a3654 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2ccbdf43.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/13cdb5bfbafa/vmlinux-2ccbdf43.xz kernel image: https://storage.googleapis.com/syzbot-assets/7a14f5d07f81/bzImage-2ccbdf43.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9a18f6f681a8e79a3654@syzkaller.appspotmail.com fscrypt: AES-256-CBC-CTS using implementation "cts-cbc-aes-aesni" ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Not tainted ------------------------------------------------------ syz-executor.0/9291 is trying to acquire lock: ffffffff8dd3aac0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:334 [inline] ffffffff8dd3aac0 (fs_reclaim){+.+.}-{0:0}, at: mempool_alloc_noprof+0xd9/0x390 mm/mempool.c:392 but task is already holding lock: ffff8880529643a8 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] ffff8880529643a8 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2203 [inline] ffff8880529643a8 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_mkdir+0x297/0x620 fs/f2fs/namei.c:778 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sbi->cp_rwsem){++++}-{3:3}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] f2fs_lock_op fs/f2fs/f2fs.h:2203 [inline] f2fs_evict_inode+0x115a/0x1e50 fs/f2fs/inode.c:866 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 f2fs_evict_inode+0x125/0x1e50 fs/f2fs/inode.c:818 evict+0x2ed/0x6c0 fs/inode.c:667 dispose_list+0x117/0x1e0 fs/inode.c:700 evict_inodes+0x34e/0x450 fs/inode.c:750 generic_shutdown_super+0xb5/0x3d0 fs/super.c:627 kill_block_super+0x3b/0x90 fs/super.c:1676 kill_f2fs_super+0x2b4/0x440 fs/f2fs/super.c:4907 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #1 (sb_internal#4){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1655 [inline] sb_start_intwrite include/linux/fs.h:1838 [inline] f2fs_evict_inode+0x1844/0x1e50 fs/f2fs/inode.c:853 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 dentry_unlink_inode+0x295/0x480 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #0 (fs_reclaim){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3801 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3815 might_alloc include/linux/sched/mm.h:334 [inline] mempool_alloc_noprof+0xd9/0x390 mm/mempool.c:392 bio_alloc_bioset+0x480/0x8b0 block/bio.c:554 f2fs_grab_read_bio+0x268/0x7d0 fs/f2fs/data.c:1050 f2fs_submit_page_read+0xaa/0x1d0 fs/f2fs/data.c:1095 f2fs_get_read_data_page+0x304/0xaf0 fs/f2fs/data.c:1271 f2fs_find_data_page+0x13b/0x720 fs/f2fs/data.c:1293 find_in_level fs/f2fs/dir.c:323 [inline] __f2fs_find_entry+0x3fd/0xc80 fs/f2fs/dir.c:388 f2fs_do_add_link+0x109/0x290 fs/f2fs/dir.c:818 f2fs_add_link fs/f2fs/f2fs.h:3586 [inline] f2fs_mkdir+0x37b/0x620 fs/f2fs/namei.c:779 vfs_mkdir+0x57d/0x860 fs/namei.c:4131 do_mkdirat+0x301/0x3a0 fs/namei.c:4154 __do_sys_mkdirat fs/namei.c:4169 [inline] __se_sys_mkdirat fs/namei.c:4167 [inline] __ia32_sys_mkdirat+0x84/0xb0 fs/namei.c:4167 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Chain exists of: fs_reclaim --> sb_internal#4 --> &sbi->cp_rwsem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&sbi->cp_rwsem); lock(sb_internal#4); lock(&sbi->cp_rwsem); lock(fs_reclaim); *** DEADLOCK *** 3 locks held by syz-executor.0/9291: #0: ffff8880593be420 (sb_writers#13){.+.+}-{0:0}, at: filename_create+0x10d/0x530 fs/namei.c:3893 #1: ffff8880511650a0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline] #1: ffff8880511650a0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x1c2/0x530 fs/namei.c:3900 #2: ffff8880529643a8 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2154 [inline] #2: ffff8880529643a8 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2203 [inline] #2: ffff8880529643a8 (&sbi->cp_rwsem){++++}-{3:3}, at: f2fs_mkdir+0x297/0x620 fs/f2fs/namei.c:778 stack backtrace: CPU: 0 PID: 9291 Comm: syz-executor.0 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3801 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3815 might_alloc include/linux/sched/mm.h:334 [inline] mempool_alloc_noprof+0xd9/0x390 mm/mempool.c:392 bio_alloc_bioset+0x480/0x8b0 block/bio.c:554 f2fs_grab_read_bio+0x268/0x7d0 fs/f2fs/data.c:1050 f2fs_submit_page_read+0xaa/0x1d0 fs/f2fs/data.c:1095 f2fs_get_read_data_page+0x304/0xaf0 fs/f2fs/data.c:1271 f2fs_find_data_page+0x13b/0x720 fs/f2fs/data.c:1293 find_in_level fs/f2fs/dir.c:323 [inline] __f2fs_find_entry+0x3fd/0xc80 fs/f2fs/dir.c:388 f2fs_do_add_link+0x109/0x290 fs/f2fs/dir.c:818 f2fs_add_link fs/f2fs/f2fs.h:3586 [inline] f2fs_mkdir+0x37b/0x620 fs/f2fs/namei.c:779 vfs_mkdir+0x57d/0x860 fs/namei.c:4131 do_mkdirat+0x301/0x3a0 fs/namei.c:4154 __do_sys_mkdirat fs/namei.c:4169 [inline] __se_sys_mkdirat fs/namei.c:4167 [inline] __ia32_sys_mkdirat+0x84/0xb0 fs/namei.c:4167 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7325579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ef65ac EFLAGS: 00000292 ORIG_RAX: 0000000000000128 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- 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@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