===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260113 #1 Not tainted ------------------------------------- syz-executor.6/285 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.6/285: #0: ffff88800f5383f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801891e330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f53c950 (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: 285 Comm: syz-executor.6 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f87ee5b6c27 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 53 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:00007ffe529f6c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe529f6d00 RCX: 00007f87ee5b6c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe529f6d00 RBP: 00007ffe529f6cdc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffe529f6a16 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000029287 R14: 0000000000000003 R15: 00007ffe529f6d40 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.6/285 Modules linked in: CPU: 0 UID: 0 PID: 285 Comm: syz-executor.6 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:ffff88800dbe79e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b6a8000 RCX: ffffffff815664c7 RDX: 0000000000000000 RSI: ffffffff815664d0 RDI: ffff88801b6a83fc RBP: ffff88801b6a8000 R08: 0000000000000000 R09: fffffbfff0ba6ff4 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b6a8000 R13: 0000000000000001 R14: ffffffff85c0c8e0 R15: ffff88804a4d4f58 FS: 000055557f581400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1a88a9cf64 CR3: 000000000bb04000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 do_mkdirat+0x11a/0x440 __x64_sys_mkdir+0x65/0x80 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f87ee5b6c27 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 53 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:00007ffe529f6c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe529f6d00 RCX: 00007f87ee5b6c27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffe529f6d00 RBP: 00007ffe529f6cdc R08: 0000000000000000 R09: 0000000000000004 R10: 00007ffe529f6a16 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000029287 R14: 0000000000000003 R15: 00007ffe529f6d40 irq event stamp: 290523 hardirqs last enabled at (290523): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (290522): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (290516): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (290514): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768297498.708:11): avc: denied { tracepoint } for pid=4958 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop3: detected capacity change from 0 to 224106 loop3: detected capacity change from 0 to 224106 mmap: syz-executor.1 (5052) uses deprecated remap_file_pages() syscall. See Documentation/mm/remap_file_pages.rst. audit: type=1326 audit(1768297499.375:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5055 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.377:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5055 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=316 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.377:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5055 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.377:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5055 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.377:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5055 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.469:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5066 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.471:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5066 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 audit: type=1326 audit(1768297499.477:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5066 comm="syz-executor.5" exe="/syz-executor.5" sig=0 arch=c000003e syscall=316 compat=0 ip=0x7f4411252b19 code=0x7ffc0000 loop3: detected capacity change from 0 to 224106 loop3: detected capacity change from 0 to 224106 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy22: Selected rate control algorithm 'minstrel_ht' netlink: 20 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy23: Selected rate control algorithm 'minstrel_ht' loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) mac80211_hwsim hwsim8 wlan0: entered promiscuous mode mac80211_hwsim hwsim8 wlan0: entered allmulticast mode loop7: detected capacity change from 0 to 64 FAT-fs (loop7): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) loop2: detected capacity change from 0 to 64 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) lo: entered allmulticast mode lo: left allmulticast mode lo: entered allmulticast mode lo: left allmulticast mode 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 40 00 I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 3 prio class 2 kauditd_printk_skb: 9 callbacks suppressed audit: type=1400 audit(1768297502.315:29): avc: denied { read } for pid=5358 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor.6'. audit: type=1400 audit(1768297503.770:30): avc: denied { module_load } for pid=5473 comm="syz-executor.3" path="/sys/kernel/softlockup_count" dev="sysfs" ino=11713 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:sysfs_t:s0 tclass=system permissive=1 audit: type=1326 audit(1768297503.822:31): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5479 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f1a88989b19 code=0x0 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 34 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 sr 1:0:0:0: [sr0] tag#0 unaligned transfer I/O error, dev sr0, sector 35 op 0x0:(READ) flags 0x800000 phys_seg 1 prio class 2 Zero length message leads to an empty skb SELinux: security_context_str_to_sid () failed with errno=-22 SELinux: security_context_str_to_sid () failed with errno=-22 SELinux: security_context_str_to_sid () failed with errno=-22 SELinux: security_context_str_to_sid () failed with errno=-22 SELinux: security_context_str_to_sid () failed with errno=-22