===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/4839 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.3/4839: #0: ffff88800f7323f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804eca59a8 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f736950 (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: 4839 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: 0033:0x7f52f824b427 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:00007fff7f6042f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f52f824b427 RDX: 00007fff7f6043d7 RSI: 00007f52f82a6019 RDI: 00007fff7f6043c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff7f604190 R10: 00007fff7f604047 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff7f6043c0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.3/4839 Modules linked in: CPU: 0 UID: 0 PID: 4839 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:ffff8880511c79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88805634d280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88805634d67c RBP: ffff88805634d280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88805634d280 R13: 0000000000000001 R14: ffffffff85c0ebe0 R15: ffff88804ed545d0 FS: 00005555824d1400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f52f82cb543 CR3: 000000005415d000 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: 0033:0x7f52f824b427 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:00007fff7f6042f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f52f824b427 RDX: 00007fff7f6043d7 RSI: 00007f52f82a6019 RDI: 00007fff7f6043c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff7f604190 R10: 00007fff7f604047 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007fff7f6043c0 irq event stamp: 193 hardirqs last enabled at (193): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (191): [] handle_softirqs+0x65e/0x7d0 softirqs last enabled at (192): [] __irq_exit_rcu+0xc4/0x100 softirqs last disabled at (185): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci7: command 0x0c1a tx timeout set_capacity_and_notify: 10 callbacks suppressed loop2: detected capacity change from 0 to 128 audit: type=1400 audit(1768468560.463:10): avc: denied { write } for pid=5011 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 syz-executor.2: page allocation failure: order:0, mode:0x10cc0(GFP_KERNEL|__GFP_NORETRY), nodemask=(null),cpuset=/,mems_allowed=0 CPU: 1 UID: 0 PID: 5004 Comm: syz-executor.2 Tainted: G W 6.19.0-rc5-next-20260115 #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: 0033:0x7f8f51bafb19 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:00007f8f4f125188 EFLAGS: 00000246 ORIG_RAX: 00000000000000f6 RAX: ffffffffffffffda RBX: 00007f8f51cc2f60 RCX: 00007f8f51bafb19 RDX: 0000000020000040 RSI: 0000000000000010 RDI: 0000000000000000 RBP: 00007f8f51c09f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeab735a7f R14: 00007f8f4f125300 R15: 0000000000022000 Mem-Info: active_anon:60 inactive_anon:80516 isolated_anon:0 active_file:9109 inactive_file:38046 isolated_file:47 unevictable:0 dirty:295 writeback:0 slab_reclaimable:6013 slab_unreclaimable:56082 mapped:80974 shmem:95 pagetables:2809 sec_pagetables:0 bounce:0 kernel_misc_reclaimable:0 free:6007 free_pcp:92 free_cma:0 Node 0 active_anon:240kB inactive_anon:322064kB active_file:36436kB inactive_file:152088kB unevictable:0kB isolated(anon):0kB isolated(file):188kB mapped:323896kB dirty:1264kB writeback:0kB shmem:380kB kernel_stack:6144kB pagetables:11236kB sec_pagetables:0kB all_unreclaimable? no Balloon:0kB Node 0 DMA free:6432kB boost:0kB min:44kB low:56kB high:68kB reserved_highatomic:0KB free_highatomic:0KB active_anon:8kB inactive_anon:0kB active_file:56kB 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:18016kB boost:12460kB min:17528kB low:19148kB high:20768kB reserved_highatomic:0KB free_highatomic:0KB active_anon:240kB inactive_anon:321980kB active_file:36856kB inactive_file:150804kB unevictable:0kB writepending:1516kB zspages:0kB present:2080640kB managed:1635448kB mlocked:0kB bounce:0kB free_pcp:1052kB local_pcp:516kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 0*4kB 2*8kB (UM) 1*16kB (M) 2*32kB (UM) 1*64kB (U) 1*128kB (M) 2*256kB (UM) 1*512kB (M) 1*1024kB (M) 0*2048kB 1*4096kB (M) = 6432kB Node 0 DMA32: 524*4kB (UME) 228*8kB (UM) 109*16kB (UM) 68*32kB (UME) 45*64kB (UME) 29*128kB (UM) 7*256kB (M) 6*512kB (UM) 0*1024kB 0*2048kB 0*4096kB = 19296kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 44752 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 21164kB Bluetooth: hci0: command 0x0c1a tx timeout kexec: Could not allocate control_code_buffer Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout kexec: Could not allocate control_code_buffer loop2: detected capacity change from 0 to 128 netlink: 104 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 104 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 104 bytes leftover after parsing attributes in process `syz-executor.5'. kexec: Could not allocate control_code_buffer loop2: detected capacity change from 0 to 128 netlink: 104 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 104 bytes leftover after parsing attributes in process `syz-executor.5'. kexec: Could not allocate control_code_buffer audit: type=1326 audit(1768468565.115:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5183 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd720730b19 code=0x0 loop2: detected capacity change from 0 to 6 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed audit: type=1326 audit(1768468565.948:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5183 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd720730b19 code=0x0 audit: type=1326 audit(1768468566.043:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5218 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd720730b19 code=0x0 loop6: detected capacity change from 0 to 6 loop2: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed loop2: detected capacity change from 0 to 6 loop6: detected capacity change from 0 to 6 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed loop6: detected capacity change from 0 to 6 FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed FAT-fs (loop6): Directory bread(block 6) failed loop2: detected capacity change from 0 to 6 FAT-fs (loop2): Directory bread(block 6) failed audit: type=1326 audit(1768468566.991:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5263 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd720730b19 code=0x0 FAT-fs (loop2): Directory bread(block 6) failed FAT-fs (loop2): Directory bread(block 6) failed audit: type=1326 audit(1768468567.912:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5297 comm="syz-executor.4" exe="/syz-executor.4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fd720730b19 code=0x0