loop7: detected capacity change from 0 to 4 EXT4-fs (loop7): Couldn't mount because of unsupported optional features (bd541021) ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.1/275 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.1/275: #0: ffff88800f7763f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff88801af5e330 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f47a950 (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: 275 Comm: syz-executor.1 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_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7278abdc27 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 53 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:00007ffd4d958ca8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd4d958d30 RCX: 00007f7278abdc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd4d958d30 RBP: 00007ffd4d958d0c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffd4d958a47 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002036e R14: 0000000000000007 R15: 00007ffd4d958d70 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#0: syz-executor.1/275 Modules linked in: CPU: 0 UID: 0 PID: 275 Comm: syz-executor.1 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:ffff88801a43f9e0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88800f2c9b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff88800f2c9f7c RBP: ffff88800f2c9b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f2c9b80 R13: 0000000000000001 R14: ffffffff85c0c5c0 R15: ffff8880499d9fb0 FS: 000055558204d400(0000) GS:ffff8880e5342000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f24c60b6718 CR3: 000000000e3bb000 CR4: 0000000000350ef0 Call Trace: __wait_on_freeing_inode+0x10f/0x350 insert_inode_locked+0x25f/0x890 __ext4_new_inode+0x223d/0x4cd0 ext4_mkdir+0x331/0xb30 vfs_mkdir+0x6d8/0xc00 filename_mkdirat+0x118/0x430 __x64_sys_mkdir+0x6e/0xd0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7278abdc27 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 53 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:00007ffd4d958ca8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd4d958d30 RCX: 00007f7278abdc27 RDX: 0000000000000000 RSI: 00000000000001ff RDI: 00007ffd4d958d30 RBP: 00007ffd4d958d0c R08: 0000000000000000 R09: 0000000000000003 R10: 00007ffd4d958a47 R11: 0000000000000202 R12: 0000000000000032 R13: 000000000002036e R14: 0000000000000007 R15: 00007ffd4d958d70 irq event stamp: 188043 hardirqs last enabled at (188043): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (188042): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (188038): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (188036): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 capability: warning: `syz-executor.7' uses deprecated v2 capabilities in a way that may be insecure random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 random: crng reseeded on system resumption faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2 raw_sendmsg: syz-executor.1 forgot to set AF_INET. Fix it! random: crng reseeded on system resumption audit: type=1400 audit(1768470690.478:11): avc: denied { block_suspend } for pid=4121 comm="syz-executor.4" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=4122 comm=syz-executor.0 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=4135 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=4153 comm=syz-executor.0 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=4180 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=4199 comm=syz-executor.0 Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported Bluetooth: hci4: adv larger than maximum supported loop2: detected capacity change from 0 to 2048 audit: type=1400 audit(1768470691.694:12): avc: denied { write } for pid=4205 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 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. Bluetooth: hci4: unexpected event 0x3e length: 431 > 260 Bluetooth: hci4: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci4: adv larger than maximum supported random: crng reseeded on system resumption random: crng reseeded on system resumption loop2: detected capacity change from 0 to 2048 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop2: detected capacity change from 0 to 2048 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. No source specified No source specified 9pnet_fd: Insufficient options for proto=fd 9pnet_fd: Insufficient options for proto=fd random: crng reseeded on system resumption loop2: detected capacity change from 0 to 2048 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 4 9pnet_fd: Insufficient options for proto=fd EXT4-fs (loop1): Can't read superblock on 2nd try loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): Can't read superblock on 2nd try random: crng reseeded on system resumption loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): Can't read superblock on 2nd try loop1: detected capacity change from 0 to 4 EXT4-fs (loop1): Can't read superblock on 2nd try loop1: detected capacity change from 0 to 4 audit: type=1400 audit(1768470694.150:13): avc: denied { module_load } for pid=4362 comm="syz-executor.3" path="/syz-executor.3" dev="sda" ino=15934 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=system permissive=1 Invalid ELF header type: 3 != 1 audit: type=1400 audit(1768470694.187:14): avc: denied { module_load } for pid=4375 comm="syz-executor.0" path=2F6D656D66643A2F70726F632F7468726561642D73656C662F617474722F6673637265617465202864656C6574656429 dev="tmpfs" ino=1032 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1 EXT4-fs (loop1): Can't read superblock on 2nd try Invalid ELF header type: 3 != 1 Invalid ELF header type: 3 != 1 Bluetooth: hci4: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci4: Injecting HCI hardware error event Bluetooth: hci4: hardware error 0x00 Invalid ELF header type: 3 != 1 netlink: 'syz-executor.1': attribute type 10 has an invalid length. netlink: 'syz-executor.1': attribute type 10 has an invalid length. netlink: 'syz-executor.0': attribute type 33 has an invalid length. netlink: 'syz-executor.1': attribute type 10 has an invalid length. Invalid ELF header type: 3 != 1 loop6: detected capacity change from 0 to 1298 netlink: 'syz-executor.1': attribute type 10 has an invalid length. netlink: 'syz-executor.1': attribute type 10 has an invalid length. Bluetooth: hci4: Opcode 0x0c03 failed: -110