===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.3/4088 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.3/4088: #0: ffff88800f7383f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804d242a00 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f73c950 (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: 4088 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: 0033:0x7f2f4134f427 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:00007ffc9cea3d98 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f4134f427 RDX: 00007ffc9cea3e73 RSI: 00007f2f413aa02f RDI: 00007ffc9cea3e60 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9cea3c30 R10: 00007ffc9cea3ae7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc9cea3e60 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.3/4088 Modules linked in: CPU: 1 UID: 0 PID: 4088 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:ffff88804c0e79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88805413d280 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88805413d67c RBP: ffff88805413d280 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88805413d280 R13: 0000000000000001 R14: ffffffff85c10b70 R15: ffff88801b4ef578 FS: 0000555584101400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555584101708 CR3: 000000004b400000 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: 0033:0x7f2f4134f427 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:00007ffc9cea3d98 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f4134f427 RDX: 00007ffc9cea3e73 RSI: 00007f2f413aa02f RDI: 00007ffc9cea3e60 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc9cea3c30 R10: 00007ffc9cea3ae7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc9cea3e60 irq event stamp: 719 hardirqs last enabled at (719): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (718): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (714): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (712): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. syz-executor.3 (4100) used greatest stack depth: 23952 bytes left ======================================================= 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. ======================================================= tmpfs: Unknown parameter './file0' loop7: detected capacity change from 0 to 6 FAT-fs (loop7): Directory bread(block 6) failed loop6: detected capacity change from 0 to 128 loop4: detected capacity change from 0 to 512 EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1768467286.865:10): avc: denied { write } for pid=4263 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Test Unit Ready sr 1:0:0:0: [sr0] tag#0 CDB[00]: 00 b5 e8 63 84 61 27 04 8f 4f f5 ce 00 63 0e a5 sr 1:0:0:0: [sr0] tag#0 CDB[10]: ed UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list mac80211_hwsim hwsim3 wlan1: entered promiscuous mode mac80211_hwsim hwsim3 wlan1: left promiscuous mode mac80211_hwsim hwsim3 wlan1: entered promiscuous mode sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Test Unit Ready sr 1:0:0:0: [sr0] tag#0 CDB[00]: 00 b5 e8 63 84 61 27 04 8f 4f f5 ce 00 63 0e a5 sr 1:0:0:0: [sr0] tag#0 CDB[10]: ed mac80211_hwsim hwsim3 wlan1: left promiscuous mode sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Test Unit Ready sr 1:0:0:0: [sr0] tag#0 CDB[00]: 00 b5 e8 63 84 61 27 04 8f 4f f5 ce 00 63 0e a5 sr 1:0:0:0: [sr0] tag#0 CDB[10]: ed mac80211_hwsim hwsim3 wlan1: entered promiscuous mode mac80211_hwsim hwsim3 wlan1: left promiscuous mode sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 CDB: Test Unit Ready sr 1:0:0:0: [sr0] tag#0 CDB[00]: 00 b5 e8 63 84 61 27 04 8f 4f f5 ce 00 63 0e a5 sr 1:0:0:0: [sr0] tag#0 CDB[10]: ed mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode mac80211_hwsim hwsim17 wlan1: entered promiscuous mode mac80211_hwsim hwsim17 wlan1: left promiscuous mode mac80211_hwsim hwsim3 wlan1: entered promiscuous mode mac80211_hwsim hwsim3 wlan1: left promiscuous mode mac80211_hwsim hwsim3 wlan1: entered promiscuous mode mac80211_hwsim hwsim3 wlan1: left promiscuous mode audit: type=1400 audit(1768467288.055:11): avc: denied { tracepoint } for pid=4399 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 loop7: detected capacity change from 0 to 64 FAT-fs (loop7): bogus number of FAT structure FAT-fs (loop7): Can't find a valid FAT filesystem loop7: detected capacity change from 0 to 64 FAT-fs (loop7): bogus number of reserved sectors FAT-fs (loop7): Can't find a valid FAT filesystem loop7: detected capacity change from 0 to 64 FAT-fs (loop7): bogus number of FAT structure FAT-fs (loop7): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 64 FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem loop7: detected capacity change from 0 to 64 FAT-fs (loop7): bogus number of FAT structure FAT-fs (loop7): Can't find a valid FAT filesystem loop4: detected capacity change from 0 to 64 loop2: detected capacity change from 0 to 64 FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of FAT structure FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop7): bogus number of FAT structure FAT-fs (loop7): Can't find a valid FAT filesystem capability: warning: `syz-executor.3' uses deprecated v2 capabilities in a way that may be insecure FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem FAT-fs (loop4): bogus number of FAT structure FAT-fs (loop4): Can't find a valid FAT filesystem set_capacity_and_notify: 4 callbacks suppressed loop3: detected capacity change from 0 to 2048 EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000.