kernel read not supported for file /vga_arbiter (pid: 58 comm: kworker/1:2) ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260114 #1 Not tainted ------------------------------------- syz-executor.0/3990 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.0/3990: #0: ffff88800f8343f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff888048d22a00 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f720950 (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: 3990 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260114 #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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f517bd86427 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:00007ffc1823ba68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f517bd86427 RDX: 00007ffc1823bb43 RSI: 00007f517bde1022 RDI: 00007ffc1823bb30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc1823b900 R10: 00007ffc1823b7b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc1823bb30 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.0/3990 Modules linked in: CPU: 1 UID: 0 PID: 3990 Comm: syz-executor.0 Not tainted 6.19.0-rc5-next-20260114 #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 16 c0 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 24 74 03 e8 bc 5c 56 00 e9 RSP: 0018:ffff88801b7079a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff88801b5a9b80 RCX: ffffffff81565a27 RDX: 0000000000000000 RSI: ffffffff81565a30 RDI: ffff88801b5a9f7c RBP: ffff88801b5a9b80 R08: 0000000000000000 R09: fffffbfff0ba6ffc R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801b5a9b80 R13: 0000000000000001 R14: ffffffff85c0dd30 R15: ffff888048d458e0 FS: 000055557b127400(0000) GS:ffff8880e5443000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f517be06540 CR3: 000000001e596000 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 do_symlinkat+0x153/0x440 __x64_sys_symlink+0x79/0xa0 do_syscall_64+0xbf/0x420 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f517bd86427 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:00007ffc1823ba68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f517bd86427 RDX: 00007ffc1823bb43 RSI: 00007f517bde1022 RDI: 00007ffc1823bb30 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc1823b900 R10: 00007ffc1823b7b7 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffc1823bb30 irq event stamp: 615 hardirqs last enabled at (615): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (614): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (610): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (608): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- kernel read not supported for file /vga_arbiter (pid: 41 comm: kworker/1:1) EXT4-fs warning (device sda): verify_group_input:161: Bad blocks count 0 kernel read not supported for file /vga_arbiter (pid: 63 comm: kworker/0:2) EXT4-fs warning (device sda): verify_group_input:161: Bad blocks count 0 EXT4-fs warning (device sda): verify_group_input:161: Bad blocks count 0 audit: type=1400 audit(1768382275.818:10): avc: denied { read } for pid=4044 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 warning (device sda): verify_group_input:161: Bad blocks count 0 loop1: detected capacity change from 0 to 144 EXT4-fs (loop1): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir214171753/syzkaller.ioOba5/8/mnt supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09. UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list audit: type=1401 audit(1768382279.609:11): op=security_bounded_transition seresult=denied oldcontext=system_u:system_r:kernel_t:s0 newcontext=system_u:object_r:getty_runtime_t:s0 audit: type=1401 audit(1768382279.663:12): op=security_bounded_transition seresult=denied oldcontext=system_u:system_r:kernel_t:s0 newcontext=system_u:object_r:getty_runtime_t:s0 audit: type=1400 audit(1768382279.803:13): avc: denied { write } for pid=4499 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1401 audit(1768382279.832:14): op=security_bounded_transition seresult=denied oldcontext=system_u:system_r:kernel_t:s0 newcontext=system_u:object_r:getty_runtime_t:s0 audit: type=1401 audit(1768382280.460:15): op=security_bounded_transition seresult=denied oldcontext=system_u:system_r:kernel_t:s0 newcontext=system_u:object_r:getty_runtime_t:s0 audit: type=1400 audit(1768382281.614:16): avc: denied { block_suspend } for pid=4572 comm="syz-executor.5" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 Bluetooth: hci0: unexpected event 0x3e length: 431 > 260 Bluetooth: hci0: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci0: adv larger than maximum supported Bluetooth: hci0: adv larger than maximum supported Bluetooth: hci0: Malformed LE Event: 0x0d Bluetooth: hci0: unexpected event 0x3e length: 431 > 260 Bluetooth: hci0: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci0: adv larger than maximum supported Bluetooth: hci0: adv larger than maximum supported Bluetooth: hci0: Malformed LE Event: 0x0d Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: adv larger than maximum supported Bluetooth: hci7: adv larger than maximum supported Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci3: unexpected event 0x3e length: 431 > 260 Bluetooth: hci3: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci3: adv larger than maximum supported Bluetooth: hci3: adv larger than maximum supported Bluetooth: hci3: Malformed LE Event: 0x0d syz-executor.2 (4601): /proc/4599/oom_adj is deprecated, please use /proc/4599/oom_score_adj instead. Bluetooth: hci0: unexpected event 0x3e length: 431 > 260 Bluetooth: hci0: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci0: adv larger than maximum supported Bluetooth: hci0: adv larger than maximum supported Bluetooth: hci0: Malformed LE Event: 0x0d Invalid option length (1048186) for dns_resolver key Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci0: unexpected event 0x3e length: 431 > 260 Bluetooth: hci0: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci0: Malformed LE Event: 0x0d Bluetooth: hci3: unexpected event 0x3e length: 431 > 260 Bluetooth: hci3: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci3: Malformed LE Event: 0x0d Invalid option length (1048186) for dns_resolver key Invalid option length (1048186) for dns_resolver key netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. Bluetooth: hci7: unexpected event 0x3e length: 431 > 260 Bluetooth: hci7: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci7: Malformed LE Event: 0x0d Bluetooth: hci3: unexpected event 0x3e length: 431 > 260 Bluetooth: hci3: unexpected subevent 0x0d length: 430 > 260 Bluetooth: hci3: Malformed LE Event: 0x0d loop0: detected capacity change from 0 to 512 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted! loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. EXT4-fs (loop0): group descriptors corrupted! netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted! loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted! loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock EXT4-fs (loop0): group descriptors corrupted! Invalid ELF header magic: != ELF Invalid ELF header magic: != ELF Invalid ELF header magic: != ELF 9pnet_virtio: no channels available for device syz 9pnet_virtio: no channels available for device syz Invalid ELF header magic: != ELF 9pnet_virtio: no channels available for device syz Invalid ELF header magic: != ELF 9pnet_virtio: no channels available for device syz 9pnet_virtio: no channels available for device syz