===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.7/5140 is trying to release lock (rcu_read_lock) at: [] __wait_on_freeing_inode+0x105/0x350 but there are no more locks to release! other info that might help us debug this: 4 locks held by syz-executor.7/5140: #0: ffff88800f89a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880476e96f0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f89e950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe32/0x12d0 #3: ffffffff85c16898 (inode_hash_lock){+.+.}-{3:3}, at: insert_inode_locked+0xf9/0x890 stack backtrace: CPU: 0 UID: 0 PID: 5140 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 print_unlock_imbalance_bug+0x118/0x130 lock_release+0x1ee/0x270 __wait_on_freeing_inode+0x10a/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4c65dc9427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffedc9c5078 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4c65dc9427 RDX: ffffffffffffffbc RSI: 00007f4c65e2400e RDI: 00007f4c65e231dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffedc9c4af0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffedc9c5140 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.7/5140 Modules linked in: CPU: 0 UID: 0 PID: 5140 Comm: syz-executor.7 Not tainted 6.19.0-rc5-next-20260114 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__rcu_read_unlock+0x25f/0x5c0 Code: f2 02 00 00 c7 43 58 01 00 00 00 bf 09 00 00 00 e8 16 c0 de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 8a 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 81 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88801ecb79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888046588000 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff8880465883fc RBP: ffff888046588000 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff888046588000 R13: 0000000000000001 R14: ffffffff85c0f590 R15: ffff88804766a938 FS: 00005555722a8400(0000) GS:ffff8880e5343000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c65e49547 CR3: 000000000d735000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x623/0xb40 vfs_symlink+0x44b/0x840 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4c65dc9427 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 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:00007ffedc9c5078 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4c65dc9427 RDX: ffffffffffffffbc RSI: 00007f4c65e2400e RDI: 00007f4c65e231dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffedc9c4af0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffedc9c5140 irq event stamp: 689 hardirqs last enabled at (689): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (688): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (684): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (682): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- Bluetooth: hci0: Opcode 0x0c03 failed: -110 Bluetooth: hci3: Opcode 0x0c03 failed: -110 Bluetooth: hci2: Opcode 0x0c03 failed: -110 Bluetooth: hci4: Opcode 0x0c03 failed: -110 loop2: detected capacity change from 0 to 16383 loop2: detected capacity change from 0 to 16383 random: crng reseeded on system resumption loop0: detected capacity change from 0 to 1024 random: crng reseeded on system resumption EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir391712188/syzkaller.jxcHBP/38/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop2: detected capacity change from 0 to 16383 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 1024 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir391712188/syzkaller.jxcHBP/39/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption netlink: 'syz-executor.1': attribute type 10 has an invalid length. loop0: detected capacity change from 0 to 1024 loop2: detected capacity change from 0 to 16383 netlink: 'syz-executor.1': attribute type 10 has an invalid length. EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir391712188/syzkaller.jxcHBP/40/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption loop2: detected capacity change from 0 to 16383 TCP: TCP_TX_DELAY enabled loop0: detected capacity change from 0 to 1024 netlink: 'syz-executor.1': attribute type 10 has an invalid length. random: crng reseeded on system resumption EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir391712188/syzkaller.jxcHBP/41/file0 supports timestamps until 2038-01-19 (0x7fffffff) netlink: 'syz-executor.1': attribute type 10 has an invalid length. UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. mac80211_hwsim hwsim9 wlan1: entered allmulticast mode mac80211_hwsim hwsim9 wlan1: left allmulticast mode mac80211_hwsim hwsim9 wlan1: entered allmulticast mode netlink: 'syz-executor.1': attribute type 10 has an invalid length. mac80211_hwsim hwsim9 wlan1: left allmulticast mode capability: warning: `syz-executor.6' uses deprecated v2 capabilities in a way that may be insecure EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 mac80211_hwsim hwsim9 wlan1: entered allmulticast mode mac80211_hwsim hwsim9 wlan1: left allmulticast mode EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 mac80211_hwsim hwsim9 wlan1: entered allmulticast mode mac80211_hwsim hwsim9 wlan1: left allmulticast mode EXT4-fs: EXT4-fs: inode_readahead_blks must be 0 or a power of 2 smaller than 2^31 loop5: detected capacity change from 0 to 368 audit: type=1326 audit(1768381368.210:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.217:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.218:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.218:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=123 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.218:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.221:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 mac80211_hwsim hwsim9 wlan1: entered allmulticast mode audit: type=1326 audit(1768381368.227:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5321 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 mac80211_hwsim hwsim9 wlan1: left allmulticast mode audit: type=1326 audit(1768381368.312:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5334 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.331:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5334 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 audit: type=1326 audit(1768381368.340:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5334 comm="syz-executor.1" exe="/syz-executor.1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7fa84f681b19 code=0x7ffc0000 Option 'W1Y c_+ì' to dns_resolver key: bad/missing value Option 'W1Y c_+ì' to dns_resolver key: bad/missing value Option 'W1Y c_+ì' to dns_resolver key: bad/missing value Option 'W1Y c_+ì' to dns_resolver key: bad/missing value Option 'W1Y c_+ì' to dns_resolver key: bad/missing value Option 'W1Y c_+ì' to dns_resolver key: bad/missing value mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium Option 'W1Y c_+ì' to dns_resolver key: bad/missing value ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= set_capacity_and_notify: 4 callbacks suppressed loop0: detected capacity change from 0 to 136 isofs_fill_super: bread failed, dev=loop0, iso_blknum=34, block=68 loop0: detected capacity change from 0 to 136 isofs_fill_super: bread failed, dev=loop0, iso_blknum=34, block=68 loop0: detected capacity change from 0 to 136 isofs_fill_super: bread failed, dev=loop0, iso_blknum=34, block=68 loop0: detected capacity change from 0 to 136 isofs_fill_super: bread failed, dev=loop0, iso_blknum=34, block=68 loop0: detected capacity change from 0 to 136 isofs_fill_super: bread failed, dev=loop0, iso_blknum=34, block=68