===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.5/4711 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.5/4711: #0: ffff88800fb603f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801bf7a078 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fb64950 (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: 4711 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260116 #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: 0033:0x7f60fe7c1427 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:00007ffe89564be8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f60fe7c1427 RDX: ffffffffffffffbc RSI: 00007f60fe81c00e RDI: 00007f60fe81b1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe89564660 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe89564cb0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.5/4711 Modules linked in: CPU: 0 UID: 0 PID: 4711 Comm: syz-executor.5 Not tainted 6.19.0-rc5-next-20260116 #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:ffff88804e4779a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888049645280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88804964567c RBP: ffff888049645280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888049645280 R13: 0000000000000001 R14: ffffffff85c0e410 R15: ffff88804b644f58 FS: 000055557dbc4400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cd25000 CR3: 000000004abaf000 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: 0033:0x7f60fe7c1427 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:00007ffe89564be8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f60fe7c1427 RDX: ffffffffffffffbc RSI: 00007f60fe81c00e RDI: 00007f60fe81b1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe89564660 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe89564cb0 irq event stamp: 855 hardirqs last enabled at (855): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (854): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (850): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (848): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 35 (only 16 groups) syz-executor.4: page allocation failure: order:0, mode:0x10cc0(GFP_KERNEL|__GFP_NORETRY), nodemask=(null),cpuset=/,mems_allowed=0 CPU: 0 UID: 0 PID: 4754 Comm: syz-executor.4 Tainted: G W 6.19.0-rc5-next-20260116 #1 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xfa/0x120 warn_alloc+0x211/0x370 __alloc_frozen_pages_noprof+0x17c5/0x25b0 alloc_pages_mpol+0xed/0x340 alloc_pages_noprof+0xa1/0x380 kimage_alloc_pages+0x70/0x240 kimage_alloc_control_pages+0x18f/0x970 do_kexec_load+0x2c1/0xa50 __x64_sys_kexec_load+0x1c6/0x230 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f25e1d24b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f25df29a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6 RAX: ffffffffffffffda RBX: 00007f25e1e37f60 RCX: 00007f25e1d24b19 RDX: 0000000020000140 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 00007f25e1d7ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdae202c0f R14: 00007f25df29a300 R15: 0000000000022000 Mem-Info: active_anon:57 inactive_anon:74957 isolated_anon:0 active_file:9285 inactive_file:44601 isolated_file:84 unevictable:0 dirty:468 writeback:42 slab_reclaimable:6145 slab_unreclaimable:61793 mapped:81107 shmem:113 pagetables:4217 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:5927 free_pcp:193 free_cma:0 Node 0 active_anon:228kB inactive_anon:299828kB active_file:37140kB inactive_file:178040kB unevictable:0kB isolated(anon):0kB isolated(file):336kB mapped:324428kB dirty:1872kB writeback:84kB shmem:452kB kernel_stack:7456kB pagetables:16868kB sec_pagetables:0kB all_unreclaimable? no Balloon:0kB mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium Node 0 DMA free:6432kB boost:0kB min:44kB low:56kB high:68kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 1597 1597 1597 Node 0 DMA32 free:19040kB boost:12460kB min:17528kB low:19148kB high:20768kB reserved_highatomic:0KB free_highatomic:0KB active_anon:228kB inactive_anon:299744kB active_file:37140kB inactive_file:176748kB unevictable:0kB writepending:1704kB zspages:0kB present:2080640kB managed:1635448kB mlocked:0kB bounce:0kB free_pcp:1116kB local_pcp:676kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 0*4kB 0*8kB 0*16kB 1*32kB (U) 0*64kB 0*128kB 1*256kB (U) 0*512kB 0*1024kB 1*2048kB (M) 1*4096kB (M) = 6432kB Node 0 DMA32: 798*4kB (UME) 231*8kB (UME) 113*16kB (UME) 77*32kB (UME) 46*64kB (UME) 30*128kB (UME) 8*256kB (UM) 4*512kB (UME) 2*1024kB (UM) 0*2048kB 0*4096kB = 22240kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 45245 total pagecache pages 0 pages in swap cache Free swap = 0kB Total swap = 0kB 524158 pages RAM 0 pages HighMem/MovableOnly 111456 pages reserved Memory cgroup min protection 0kB -- low protection 48980kB kexec: Could not allocate control_code_buffer kexec: Could not allocate control_code_buffer netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. kexec: Could not allocate control_code_buffer netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. kexec: Could not allocate control_code_buffer UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1400 audit(1768575975.573:13): avc: denied { read } for pid=4869 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 audit: type=1400 audit(1768575975.573:14): avc: denied { write } for pid=4869 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 kexec: Could not allocate control_code_buffer netlink: 'syz-executor.0': attribute type 16 has an invalid length. netlink: 'syz-executor.0': attribute type 16 has an invalid length. syz_tun: entered allmulticast mode audit: type=1400 audit(1768575977.804:15): avc: denied { watch } for pid=5049 comm="syz-executor.0" path="/proc/5049/task" dev="proc" ino=8147 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=dir permissive=1 netlink: 'syz-executor.4': attribute type 16 has an invalid length. netlink: 'syz-executor.4': attribute type 16 has an invalid length. loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 2048 EXT4-fs error (device loop3): __ext4_fill_super:5560: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1400 audit(1768575978.269:16): avc: denied { tracepoint } for pid=5121 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable cgroup: fork rejected by pids controller in /syz2