ext4 filesystem being mounted at /syzkaller-testdir773853261/syzkaller.cMtffg/86/file0 supports timestamps until 2038 (0x7fffffff) 9pnet_virtio: no channels available for device syz ====================================================== WARNING: possible circular locking dependency detected 5.10.52 #1 Not tainted ------------------------------------------------------ syz-executor.4/11731 is trying to acquire lock: ffff8880207a4b28 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x4d/0x380 fs/quota/dquot.c:476 but task is already holding lock: ffff888047d08278 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x74f/0x12b0 fs/ext4/inode.c:4258 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->i_data_sem/2){++++}-{3:3}: down_read+0x9b/0x420 kernel/locking/rwsem.c:1504 ext4_map_blocks+0x380/0x18d0 fs/ext4/inode.c:560 ext4_getblk+0x144/0x680 fs/ext4/inode.c:847 ext4_bread+0x29/0x210 fs/ext4/inode.c:899 ext4_quota_write+0x233/0x630 fs/ext4/super.c:6544 write_blk+0x10c/0x200 fs/quota/quota_tree.c:73 get_free_dqblk+0xff/0x2d0 fs/quota/quota_tree.c:102 do_insert_tree+0x79c/0x1150 fs/quota/quota_tree.c:309 do_insert_tree+0xf5c/0x1150 fs/quota/quota_tree.c:340 dq_insert_tree fs/quota/quota_tree.c:366 [inline] qtree_write_dquot+0x3bf/0x580 fs/quota/quota_tree.c:385 v2_write_dquot+0x11c/0x250 fs/quota/quota_v2.c:358 dquot_acquire+0x2cf/0x570 fs/quota/dquot.c:443 ext4_acquire_dquot+0x245/0x350 fs/ext4/super.c:6200 dqget+0x61e/0xf00 fs/quota/dquot.c:901 __dquot_initialize+0x3c3/0xb80 fs/quota/dquot.c:1479 ext4_setattr+0x3ae/0x2220 fs/ext4/inode.c:5349 notify_change+0xb9e/0x1080 fs/attr.c:336 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2905 [inline] do_open fs/namei.c:3247 [inline] path_openat+0x1d4d/0x26c0 fs/namei.c:3360 do_filp_open+0x17e/0x3c0 fs/namei.c:3387 do_sys_openat2+0x16d/0x420 fs/open.c:1180 do_sys_open fs/open.c:1196 [inline] __do_sys_openat fs/open.c:1212 [inline] __se_sys_openat fs/open.c:1207 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1207 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x9b/0x420 kernel/locking/rwsem.c:1504 v2_read_dquot+0x49/0x120 fs/quota/quota_v2.c:332 dquot_acquire+0x133/0x570 fs/quota/dquot.c:434 ext4_acquire_dquot+0x245/0x350 fs/ext4/super.c:6200 dqget+0x61e/0xf00 fs/quota/dquot.c:901 __dquot_initialize+0x3c3/0xb80 fs/quota/dquot.c:1479 ext4_setattr+0x3ae/0x2220 fs/ext4/inode.c:5349 notify_change+0xb9e/0x1080 fs/attr.c:336 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2905 [inline] do_open fs/namei.c:3247 [inline] path_openat+0x1d4d/0x26c0 fs/namei.c:3360 do_filp_open+0x17e/0x3c0 fs/namei.c:3387 do_sys_openat2+0x16d/0x420 fs/open.c:1180 do_sys_open fs/open.c:1196 [inline] __do_sys_openat fs/open.c:1212 [inline] __se_sys_openat fs/open.c:1207 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1207 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:2985 [inline] check_prevs_add kernel/locking/lockdep.c:3110 [inline] validate_chain kernel/locking/lockdep.c:3725 [inline] __lock_acquire+0x29f6/0x5b20 kernel/locking/lockdep.c:4950 lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __mutex_lock_common kernel/locking/mutex.c:969 [inline] __mutex_lock+0x13f/0x1230 kernel/locking/mutex.c:1114 dquot_commit+0x4d/0x380 fs/quota/dquot.c:476 ext4_write_dquot+0x243/0x2f0 fs/ext4/super.c:6184 ext4_mark_dquot_dirty+0x111/0x1a0 fs/ext4/super.c:6235 mark_dquot_dirty fs/quota/dquot.c:347 [inline] mark_all_dquot_dirty fs/quota/dquot.c:385 [inline] __dquot_free_space+0x739/0xa60 fs/quota/dquot.c:1894 dquot_free_space_nodirty include/linux/quotaops.h:376 [inline] dquot_free_space include/linux/quotaops.h:381 [inline] dquot_free_block include/linux/quotaops.h:392 [inline] ext4_free_blocks+0x1a76/0x20e0 fs/ext4/mballoc.c:5503 ext4_remove_blocks fs/ext4/extents.c:2501 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2667 [inline] ext4_ext_remove_space+0x2077/0x40d0 fs/ext4/extents.c:2915 ext4_ext_truncate+0x1e6/0x240 fs/ext4/extents.c:4376 ext4_truncate+0xd5a/0x12b0 fs/ext4/inode.c:4263 ext4_setattr+0x1487/0x2220 fs/ext4/inode.c:5504 notify_change+0xb9e/0x1080 fs/attr.c:336 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2905 [inline] do_open fs/namei.c:3247 [inline] path_openat+0x1d4d/0x26c0 fs/namei.c:3360 do_filp_open+0x17e/0x3c0 fs/namei.c:3387 do_sys_openat2+0x16d/0x420 fs/open.c:1180 do_sys_open fs/open.c:1196 [inline] __do_sys_openat fs/open.c:1212 [inline] __se_sys_openat fs/open.c:1207 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1207 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 other info that might help us debug this: Chain exists of: &dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/2); lock(&s->s_dquot.dqio_sem); lock(&ei->i_data_sem/2); lock(&dquot->dq_lock); *** DEADLOCK *** 5 locks held by syz-executor.4/11731: #0: ffff88804d8ca438 (sb_writers#3){.+.+}-{0:0}, at: do_open fs/namei.c:3236 [inline] #0: ffff88804d8ca438 (sb_writers#3){.+.+}-{0:0}, at: path_openat+0x1a3d/0x26c0 fs/namei.c:3360 #1: ffff888047d08488 (&sb->s_type->i_mutex_key#13){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff888047d08488 (&sb->s_type->i_mutex_key#13){++++}-{3:3}, at: do_truncate+0x125/0x1f0 fs/open.c:62 #2: ffff888047d08310 (&ei->i_mmap_sem){++++}-{3:3}, at: ext4_setattr+0xd3d/0x2220 fs/ext4/inode.c:5429 #3: ffff888047d08278 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x74f/0x12b0 fs/ext4/inode.c:4258 #4: ffffffff84ed1e60 (dquot_srcu){....}-{0:0}, at: i_dquot fs/quota/dquot.c:926 [inline] #4: ffffffff84ed1e60 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x190/0xa60 fs/quota/dquot.c:1867 stack backtrace: CPU: 0 PID: 11731 Comm: syz-executor.4 Not tainted 5.10.52 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2120 check_prev_add kernel/locking/lockdep.c:2985 [inline] check_prevs_add kernel/locking/lockdep.c:3110 [inline] validate_chain kernel/locking/lockdep.c:3725 [inline] __lock_acquire+0x29f6/0x5b20 kernel/locking/lockdep.c:4950 lock_acquire kernel/locking/lockdep.c:5560 [inline] lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525 __mutex_lock_common kernel/locking/mutex.c:969 [inline] __mutex_lock+0x13f/0x1230 kernel/locking/mutex.c:1114 dquot_commit+0x4d/0x380 fs/quota/dquot.c:476 ext4_write_dquot+0x243/0x2f0 fs/ext4/super.c:6184 ext4_mark_dquot_dirty+0x111/0x1a0 fs/ext4/super.c:6235 mark_dquot_dirty fs/quota/dquot.c:347 [inline] mark_all_dquot_dirty fs/quota/dquot.c:385 [inline] __dquot_free_space+0x739/0xa60 fs/quota/dquot.c:1894 dquot_free_space_nodirty include/linux/quotaops.h:376 [inline] dquot_free_space include/linux/quotaops.h:381 [inline] dquot_free_block include/linux/quotaops.h:392 [inline] ext4_free_blocks+0x1a76/0x20e0 fs/ext4/mballoc.c:5503 ext4_remove_blocks fs/ext4/extents.c:2501 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2667 [inline] ext4_ext_remove_space+0x2077/0x40d0 fs/ext4/extents.c:2915 ext4_ext_truncate+0x1e6/0x240 fs/ext4/extents.c:4376 ext4_truncate+0xd5a/0x12b0 fs/ext4/inode.c:4263 ext4_setattr+0x1487/0x2220 fs/ext4/inode.c:5504 notify_change+0xb9e/0x1080 fs/attr.c:336 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2905 [inline] do_open fs/namei.c:3247 [inline] path_openat+0x1d4d/0x26c0 fs/namei.c:3360 do_filp_open+0x17e/0x3c0 fs/namei.c:3387 do_sys_openat2+0x16d/0x420 fs/open.c:1180 do_sys_open fs/open.c:1196 [inline] __do_sys_openat fs/open.c:1212 [inline] __se_sys_openat fs/open.c:1207 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1207 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f70db89a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 0000000000084e00 RSI: 0000000020004c40 RDI: ffffffffffffff9c RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffc13a2986f R14: 00007f70db89a300 R15: 0000000000022000 EXT4-fs error (device loop5): ext4_fill_super:4954: inode #2: comm syz-executor.5: iget: root inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed EXT4-fs error (device loop7): ext4_ext_check_inode:459: inode #4: comm syz-executor.7: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 3, max 4(4), depth 0(0) EXT4-fs error (device loop7): ext4_quota_enable:6380: comm syz-executor.7: Bad quota inode # 4 EXT4-fs warning (device loop7): ext4_enable_quotas:6417: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix. EXT4-fs (loop7): mount failed netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'. EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue ext4 filesystem being mounted at /syzkaller-testdir773853261/syzkaller.cMtffg/87/file0 supports timestamps until 2038 (0x7fffffff) EXT4-fs error (device loop5): ext4_fill_super:4954: inode #2: comm syz-executor.5: iget: root inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed EXT4-fs error (device loop2): ext4_ext_check_inode:459: inode #4: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 3, max 4(4), depth 0(0) EXT4-fs (loop7): mounted filesystem without journal. Opts: ,errors=continue ext4 filesystem being mounted at /syzkaller-testdir204263206/syzkaller.FzpL7q/170/file0 supports timestamps until 2038 (0x7fffffff) EXT4-fs error (device loop2): ext4_quota_enable:6380: comm syz-executor.2: Bad quota inode # 4 EXT4-fs warning (device loop2): ext4_enable_quotas:6417: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix. EXT4-fs (loop2): mount failed device veth0_vlan entered promiscuous mode netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'. EXT4-fs error (device loop4): ext4_ext_check_inode:459: inode #4: comm syz-executor.4: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 3, max 4(4), depth 0(0) EXT4-fs error (device loop4): ext4_quota_enable:6380: comm syz-executor.4: Bad quota inode # 4 EXT4-fs warning (device loop4): ext4_enable_quotas:6417: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix. EXT4-fs (loop4): mount failed