===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/5923 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.3/5923: #0: ffff88800f8ae3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804991d9a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6a2950 (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: 1 UID: 0 PID: 5923 Comm: syz-executor.3 Not tainted 6.19.0-rc5-next-20260115 #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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5fca525427 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:00007fff92370228 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5fca525427 RDX: ffffffffffffffbc RSI: 00007f5fca58000e RDI: 00007f5fca57f1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff9236fca0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff923702f0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/5923 Modules linked in: CPU: 1 UID: 0 PID: 5923 Comm: syz-executor.3 Not tainted 6.19.0-rc5-next-20260115 #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 d6 b7 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 4d 74 03 e8 2c 5d 56 00 e9 RSP: 0018:ffff888016d2f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888048d78000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888048d783fc RBP: ffff888048d78000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888048d78000 R13: 0000000000000001 R14: ffffffff85c10ee0 R15: ffff88804f2d8ca0 FS: 0000555574b14400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555574b14708 CR3: 0000000022a34000 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 filename_symlinkat+0x158/0x440 __x64_sys_symlink+0x82/0x110 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5fca525427 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:00007fff92370228 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5fca525427 RDX: ffffffffffffffbc RSI: 00007f5fca58000e RDI: 00007f5fca57f1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff9236fca0 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff923702f0 irq event stamp: 1597 hardirqs last enabled at (1597): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (1596): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (1592): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (1590): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): ext4_quota_enable:7179: comm syz-executor.3: Bad quota inum: 8, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=8). Please run e2fsck to fix. EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): ext4_quota_enable:7179: comm syz-executor.3: Bad quota inum: 8, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=8). Please run e2fsck to fix. EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): ext4_quota_enable:7179: comm syz-executor.3: Bad quota inum: 8, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=8). Please run e2fsck to fix. EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): ext4_quota_enable:7179: comm syz-executor.3: Bad quota inum: 8, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=8). Please run e2fsck to fix. EXT4-fs (loop3): mount failed tmpfs: Unknown parameter './file0' Bluetooth: hci4: ACL packet too small Bluetooth: hci4: ACL packet too small loop5: detected capacity change from 0 to 2320 loop3: detected capacity change from 0 to 2048 ISO 9660 Extensions: Microsoft Joliet Level 3 ISO 9660 Extensions: RRIP_1991A EXT4-fs error (device loop3): ext4_quota_enable:7179: comm syz-executor.3: Bad quota inum: 8, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7224: Failed to enable quota tracking (type=0, err=-117, ino=8). Please run e2fsck to fix. EXT4-fs (loop3): mount failed Bluetooth: hci4: ACL packet too small Bluetooth: hci4: ACL packet too small Bluetooth: hci4: ACL packet too small syz-executor.3 (6117) used greatest stack depth: 24208 bytes left hugetlbfs: Unknown parameter './file0' random: crng reseeded on system resumption random: crng reseeded on system resumption audit: type=1326 audit(1768469044.455:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6218 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f6194a2db19 code=0x0 random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption No source specified No source specified sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x880700 phys_seg 4 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 2, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 3, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 4, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 5, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 6, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Buffer I/O error on dev sr0, logical block 7, async page read sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x880700 phys_seg 4 prio class 2 EXT4-fs warning (device sda): ext4_block_to_path:105: block 2147483647 > max in inode 16057 EXT4-fs warning (device sda): ext4_block_to_path:105: block 2147483647 > max in inode 16057 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 0, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer Buffer I/O error on dev sr0, logical block 1, async page read sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci7: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci7: ACL packet for unknown connection handle 2745 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: SCO packet for unknown connection handle 205 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci7: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci7: ACL packet for unknown connection handle 2745 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: SCO packet for unknown connection handle 205 Bluetooth: hci7: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci7: ACL packet for unknown connection handle 2745 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: SCO packet for unknown connection handle 205 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00 sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer sr 1:0:0:0: [sr0] tag#0 unaligned transfer Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci7: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci7: ACL packet for unknown connection handle 2745 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: SCO packet for unknown connection handle 205 Bluetooth: hci5: ISO packet for unknown connection handle 1106 netlink: 'syz-executor.1': attribute type 33 has an invalid length. Bluetooth: hci5: ISO packet for unknown connection handle 1106 netlink: 'syz-executor.1': attribute type 33 has an invalid length. Bluetooth: hci5: SCO packet for unknown connection handle 205 ======================================================= 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. ======================================================= EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. mac80211_hwsim hwsim5 wlan1: entered promiscuous mode mac80211_hwsim hwsim5 wlan1: left promiscuous mode Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: SCO packet for unknown connection handle 205 Bluetooth: hci7: unexpected cc 0x2029 length: 16 > 1 Bluetooth: hci7: ACL packet for unknown connection handle 2745 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: ISO packet for unknown connection handle 1106 Bluetooth: hci7: SCO packet for unknown connection handle 205 EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. mac80211_hwsim hwsim5 wlan1: entered promiscuous mode mac80211_hwsim hwsim5 wlan1: left promiscuous mode mac80211_hwsim hwsim7 wlan1: entered promiscuous mode mac80211_hwsim hwsim7 wlan1: left promiscuous mode EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. mac80211_hwsim hwsim5 wlan1: entered promiscuous mode mac80211_hwsim hwsim19 wlan1: entered promiscuous mode mac80211_hwsim hwsim5 wlan1: left promiscuous mode mac80211_hwsim hwsim19 wlan1: left promiscuous mode Bluetooth: hci5: unexpected cc 0x2029 length: 16 > 1 mac80211_hwsim hwsim19 wlan1: entered promiscuous mode mac80211_hwsim hwsim7 wlan1: entered promiscuous mode Bluetooth: hci5: ACL packet for unknown connection handle 2745 Bluetooth: hci5: ISO packet for unknown connection handle 1106 Bluetooth: hci5: ISO packet for unknown connection handle 1106 mac80211_hwsim hwsim19 wlan1: left promiscuous mode mac80211_hwsim hwsim7 wlan1: left promiscuous mode Bluetooth: hci5: SCO packet for unknown connection handle 205 mac80211_hwsim hwsim5 wlan1: entered promiscuous mode EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. mac80211_hwsim hwsim5 wlan1: left promiscuous mode mac80211_hwsim hwsim7 wlan1: entered promiscuous mode mac80211_hwsim hwsim7 wlan1: left promiscuous mode mac80211_hwsim hwsim19 wlan1: entered promiscuous mode mac80211_hwsim hwsim19 wlan1: left promiscuous mode audit: type=1400 audit(1768469048.179:16): avc: denied { map } for pid=6504 comm="syz-executor.6" path="pipe:[12676]" dev="pipefs" ino=12676 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption random: crng reseeded on system resumption loop6: detected capacity change from 0 to 1024 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption loop6: detected capacity change from 0 to 1024 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. random: crng reseeded on system resumption EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 1024 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 1024 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. netlink: 'syz-executor.7': attribute type 4 has an invalid length. netlink: 'syz-executor.7': attribute type 4 has an invalid length. EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir393746523/syzkaller.xyTshJ/108/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.