===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.0/4080 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.0/4080: #0: ffff88800f68a3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888044ac2a00 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f68e950 (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: 4080 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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+0x406/0xb40 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: 0033:0x7f49952be427 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:00007ffdcb85d698 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f49952be427 RDX: 00007ffdcb85d773 RSI: 00007f4995319022 RDI: 00007ffdcb85d760 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdcb85d530 R10: 00007ffdcb85d3e7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdcb85d760 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/4080 Modules linked in: CPU: 1 UID: 0 PID: 4080 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260113 #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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff88806cf08cb8 EFLAGS: 00010086 RAX: 00000000ffffffff RBX: ffff888016e9b700 RCX: ffffffff81893b34 RDX: 0000000000000000 RSI: ffffffff81893b4b RDI: ffff888016e9bafc RBP: ffff888016e9b700 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff88806cf08ff8 R12: ffff888016e9b700 R13: 0000000000000001 R14: ffff88806cf379c0 R15: ffff88806cf37a20 FS: 0000555572da2400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555572da2708 CR3: 0000000049edd000 CR4: 0000000000350ef0 Call Trace: sched_tick+0x232/0x6e0 update_process_times+0x116/0x210 tick_nohz_handler+0x4ff/0x8c0 __hrtimer_run_queues+0x654/0xbb0 hrtimer_interrupt+0x369/0x830 __sysvec_apic_timer_interrupt+0xbb/0x300 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__report_bug+0x2/0x5b0 Code: 5a fd ff ff e8 7f 08 ef fc e9 53 fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 <41> 56 41 55 41 54 49 89 f4 55 48 bd 00 00 00 00 00 fc ff df 53 48 RSP: 0018:ffff888052137860 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffff84c50526 RDX: ffff8880521378f8 RSI: ffffffff815d780f RDI: 0000000000000000 RBP: ffff8880521378f8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff815d780f R13: ffff8880521378f8 R14: 0000000000000002 R15: 000000000000000b report_bug+0x7c/0x120 handle_bug+0x2e8/0x4f0 exc_invalid_op+0x35/0x80 asm_exc_invalid_op+0x1a/0x20 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 a6 bb de ff 4d 85 f6 0f 84 73 fe ff ff e8 38 89 20 00 fb e9 68 fe ff ff 90 <0f> 0b 90 5b 5d 41 5c 41 5d 41 5e e9 61 f9 73 03 e8 0c 88 56 00 e9 RSP: 0018:ffff8880521379a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016e9b700 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff888016e9bafc RBP: ffff888016e9b700 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016e9b700 R13: 0000000000000001 R14: ffffffff85c0f0e0 R15: ffff888044a558e0 __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_symlink+0x406/0xb40 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: 0033:0x7f49952be427 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:00007ffdcb85d698 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f49952be427 RDX: 00007ffdcb85d773 RSI: 00007f4995319022 RDI: 00007ffdcb85d760 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdcb85d530 R10: 00007ffdcb85d3e7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdcb85d760 irq event stamp: 599 hardirqs last enabled at (599): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (598): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (594): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (592): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list Bluetooth: hci3: command 0x0406 tx timeout loop6: detected capacity change from 0 to 136 ISOFS: Unable to identify CD-ROM format. loop6: detected capacity change from 0 to 136 ISOFS: Unable to identify CD-ROM format. loop6: detected capacity change from 0 to 136 ISOFS: Unable to identify CD-ROM format. loop6: detected capacity change from 0 to 136 ISOFS: Unable to identify CD-ROM format. loop0: detected capacity change from 0 to 640 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ext4 filesystem being mounted at /syzkaller-testdir690033473/syzkaller.BmPdOJ/21/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop6: detected capacity change from 0 to 136 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO ISOFS: Unable to identify CD-ROM format. program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO audit: type=1326 audit(1768293996.019:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4256 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7aabc6cb19 code=0x0 program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO audit: type=1326 audit(1768293996.099:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4256 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f7aabc1f72b code=0x0 audit: type=1326 audit(1768293996.810:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4275 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7aabc6cb19 code=0x0 mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode audit: type=1326 audit(1768293996.860:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4275 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f7aabc1f72b code=0x0 audit: type=1326 audit(1768293996.968:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4297 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7aabc6cb19 code=0x0 audit: type=1326 audit(1768293997.018:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4297 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f7aabc1f72b code=0x0 mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode audit: type=1326 audit(1768293997.104:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4306 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f7aabc6cb19 code=0x0 mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode audit: type=1326 audit(1768293997.156:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4306 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=3 compat=0 ip=0x7f7aabc1f72b code=0x0 mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x05 length: 430 > 12 Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x05 length: 430 > 12 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 blktrace: Concurrent blktraces are not allowed on sg0 loop1: detected capacity change from 0 to 1024 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. blktrace: Concurrent blktraces are not allowed on sg0 ext4 filesystem being mounted at /syzkaller-testdir266224574/syzkaller.kuh7r1/25/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci7: command tx timeout Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 Bluetooth: hci7: command tx timeout ---------------- Code disassembly (best guess), 4 bytes skipped: 0: e8 7f 08 ef fc callq 0xfcef0884 5: e9 53 fe ff ff jmpq 0xfffffe5d a: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 11: 00 00 00 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 41 57 push %r15 * 26: 41 56 push %r14 <-- trapping instruction 28: 41 55 push %r13 2a: 41 54 push %r12 2c: 49 89 f4 mov %rsi,%r12 2f: 55 push %rbp 30: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp 37: fc ff df 3a: 53 push %rbx 3b: 48 rex.W