===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260116 #1 Not tainted ------------------------------------- syz-executor.5/5184 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.5/5184: #0: ffff88800f7c63f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88804ad703e0 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800fdc2950 (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: 5184 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: 0033:0x7f34b5d4b427 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:00007ffcf90efdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f34b5d4b427 RDX: 00007ffcf90efeb3 RSI: 00007f34b5da602f RDI: 00007ffcf90efea0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcf90efc70 R10: 00007ffcf90efb27 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcf90efea0 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.5/5184 Modules linked in: CPU: 1 UID: 0 PID: 5184 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:ffff888048a3f9a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff8880160e0000 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff8880160e03fc RBP: ffff8880160e0000 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880160e0000 R13: 0000000000000001 R14: ffffffff85c0fb80 R15: ffff88804aea8318 FS: 00005555885e7400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34b5dcb545 CR3: 000000001e870000 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: 0033:0x7f34b5d4b427 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:00007ffcf90efdd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f34b5d4b427 RDX: 00007ffcf90efeb3 RSI: 00007f34b5da602f RDI: 00007ffcf90efea0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcf90efc70 R10: 00007ffcf90efb27 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffcf90efea0 irq event stamp: 431 hardirqs last enabled at (431): [] irqentry_exit+0x17b/0x650 hardirqs last disabled at (430): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (424): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (422): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- audit: type=1400 audit(1768575956.360:17): avc: denied { watch_reads } for pid=5239 comm="syz-executor.3" path="/syzkaller-testdir031499541/syzkaller.NanPiX/67/file0" dev="sda" ino=16005 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1 SELinux: Context KΝ is not valid (left unmapped). netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.6'. loop1: detected capacity change from 0 to 6 FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed tmpfs: Bad value for 'mpol' syz-executor.6 uses obsolete (PF_INET,SOCK_PACKET) tmpfs: Bad value for 'mpol' loop1: detected capacity change from 0 to 6 FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'. loop1: detected capacity change from 0 to 6 FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed loop1: detected capacity change from 0 to 6 EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed FAT-fs (loop1): Directory bread(block 6) failed EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. loop0: detected capacity change from 0 to 2560 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. ext4 filesystem being mounted at /syzkaller-testdir681443789/syzkaller.I5oxdG/77/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. audit: type=1400 audit(1768575957.805:18): avc: denied { write } for pid=5397 comm="syz-executor.7" name="mnt" dev="proc" ino=9766 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=lnk_file permissive=1 EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1400 audit(1768575958.525:19): avc: denied { tracepoint } for pid=5510 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 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. loop5: detected capacity change from 0 to 64 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) ieee80211 phy18: Selected rate control algorithm 'minstrel_ht' netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. ieee80211 phy19: Selected rate control algorithm 'minstrel_ht' syz-executor.2 (5506) used greatest stack depth: 23472 bytes left ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' ieee80211 phy22: Selected rate control algorithm 'minstrel_ht' audit: type=1326 audit(1768575962.027:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5770 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe6d6cb0b19 code=0x0 audit: type=1326 audit(1768575962.861:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5770 comm="syz-executor.3" exe="/syz-executor.3" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fe6d6cb0b19 code=0x0 syz-executor.4 (5837): /proc/5835/oom_adj is deprecated, please use /proc/5835/oom_score_adj instead. 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 __nla_validate_parse: 3 callbacks suppressed netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. 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 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 ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) loop3: detected capacity change from 0 to 136 ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) isofs_fill_super: get root inode failed loop3: detected capacity change from 0 to 136 isofs_fill_super: get root inode failed ALSA: seq fatal error: cannot create timer (-22) Unsupported ieee802154 address type: 0