===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.6/3974 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.6/3974: #0: ffff88800f6ac3f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880494ed020 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f6f8950 (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: 3974 Comm: syz-executor.6 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: 0033:0x7ff83b7b8427 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:00007ffc80d76408 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff83b7b8427 RDX: 00007ffc80d764e7 RSI: 00007ff83b813019 RDI: 00007ffc80d764d0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc80d762a0 R10: 00007ffc80d76157 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc80d764d0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.6/3974 Modules linked in: CPU: 1 UID: 0 PID: 3974 Comm: syz-executor.6 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:ffff88801a8e79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800a6e5280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800a6e567c RBP: ffff88800a6e5280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800a6e5280 R13: 0000000000000001 R14: ffffffff85c0f6d0 R15: ffff88801bc845d0 FS: 0000555563769400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555563769708 CR3: 0000000047c6c000 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: 0033:0x7ff83b7b8427 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:00007ffc80d76408 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff83b7b8427 RDX: 00007ffc80d764e7 RSI: 00007ff83b813019 RDI: 00007ffc80d764d0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc80d762a0 R10: 00007ffc80d76157 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc80d764d0 irq event stamp: 439 hardirqs last enabled at (439): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (438): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (434): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (432): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- syz-executor.2 uses obsolete (PF_INET,SOCK_PACKET) netlink: 636 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 636 bytes leftover after parsing attributes in process `syz-executor.3'. loop6: detected capacity change from 0 to 4 EXT4-fs (loop6): #blocks per group too big: 8448 loop6: detected capacity change from 0 to 4 EXT4-fs (loop6): #blocks per group too big: 8448 loop6: detected capacity change from 0 to 4 EXT4-fs (loop6): #blocks per group too big: 8448 loop6: detected capacity change from 0 to 4 EXT4-fs (loop6): #blocks per group too big: 8448 random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. random: crng reseeded on system resumption Restarting kernel threads ... loop6: detected capacity change from 0 to 4 Done restarting kernel threads. EXT4-fs (loop6): #blocks per group too big: 8448 loop7: detected capacity change from 0 to 4 EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! random: crng reseeded on system resumption EXT4-fs (loop7): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop7): unsupported descriptor size 64576 Restarting kernel threads ... Done restarting kernel threads. loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop7): unsupported descriptor size 64576 audit: type=1107 audit(1768470543.878:10): pid=4116 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 msg='~£ ' random: crng reseeded on system resumption audit: type=1107 audit(1768470543.887:11): pid=4116 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 msg='~£ ' Restarting kernel threads ... Done restarting kernel threads. random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. perf: interrupt took too long (2545 > 2500), lowering kernel.perf_event_max_sample_rate to 78000 perf: interrupt took too long (4066 > 4038), lowering kernel.perf_event_max_sample_rate to 49000 perf: interrupt took too long (5139 > 5082), lowering kernel.perf_event_max_sample_rate to 38000 perf: interrupt took too long (6485 > 6423), lowering kernel.perf_event_max_sample_rate to 30000 perf: interrupt took too long (8130 > 8106), lowering kernel.perf_event_max_sample_rate to 24000 perf: interrupt took too long (10188 > 10162), lowering kernel.perf_event_max_sample_rate to 19000 ext4: Unknown parameter 'no' ext4: Unknown parameter 'no' perf: interrupt took too long (12736 > 12735), lowering kernel.perf_event_max_sample_rate to 15000 audit: type=1400 audit(1768470545.978:12): avc: denied { tracepoint } for pid=4260 comm="syz-executor.6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 tmpfs: Invalid gid '0x00000000ffffffff' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' audit: type=1400 audit(1768470546.697:13): avc: denied { write } for pid=4332 comm="syz-executor.7" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 ======================================================= 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. ======================================================= ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) loop3: detected capacity change from 0 to 64 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem loop3: detected capacity change from 0 to 64 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem loop3: detected capacity change from 0 to 64 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem cgroup: subsys name conflicts with all cgroup: subsys name conflicts with all EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 99 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 99 (only 16 groups) loop3: detected capacity change from 0 to 64 loop2: detected capacity change from 0 to 64 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) syz-executor.7 (4529) used greatest stack depth: 23880 bytes left loop6: detected capacity change from 0 to 64 FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium loop3: detected capacity change from 0 to 64 FAT-fs (loop3): bogus number of FAT structure FAT-fs (loop3): Can't find a valid FAT filesystem mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1400 audit(1768470551.054:14): avc: denied { block_suspend } for pid=4641 comm="syz-executor.5" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 audit: type=1326 audit(1768470551.165:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4648 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f11a07a0b19 code=0x0 mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium audit: type=1326 audit(1768470551.994:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4648 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f11a07a0b19 code=0x0