FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem ===================================== WARNING: bad unlock balance detected! 6.19.0-rc5-next-20260115 #1 Not tainted ------------------------------------- syz-executor.2/3998 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.2/3998: #0: ffff88800f8763f8 (sb_writers#3){.+.+}-{0:0}, at: filename_create+0xf7/0x400 #1: ffff8880550d2a00 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: filename_create+0x1b1/0x400 #2: ffff88800f7b2950 (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: 3998 Comm: syz-executor.2 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: 0033:0x7f2552101427 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:00007ffcf7d6b868 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2552101427 RDX: ffffffffffffffbc RSI: 00007f255215c00e RDI: 00007f255215b1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcf7d6b2e0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcf7d6b930 ------------[ cut here ]------------ WARNING: kernel/rcu/tree_plugin.h:443 at __rcu_read_unlock+0x25f/0x5c0, CPU#1: syz-executor.2/3998 Modules linked in: CPU: 1 UID: 0 PID: 3998 Comm: syz-executor.2 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:ffff888050de79a0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: ffff888016969b80 RCX: ffffffff815660f7 RDX: 0000000000000000 RSI: ffffffff81566100 RDI: ffff888016969f7c RBP: ffff888016969b80 R08: 0000000000000000 R09: fffffbfff0ba7040 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016969b80 R13: 0000000000000001 R14: ffffffff85c0cb60 R15: ffff888053a01628 FS: 000055558500e400(0000) GS:ffff8880e5442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcf7d6ad08 CR3: 000000001f38b000 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: 0033:0x7f2552101427 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:00007ffcf7d6b868 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2552101427 RDX: ffffffffffffffbc RSI: 00007f255215c00e RDI: 00007f255215b1dd RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcf7d6b2e0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcf7d6b930 irq event stamp: 627 hardirqs last enabled at (627): [] _raw_spin_unlock_irqrestore+0x2c/0x50 hardirqs last disabled at (626): [] _raw_spin_lock_irqsave+0x53/0x60 softirqs last enabled at (622): [] kernel_fpu_end+0x59/0x70 softirqs last disabled at (620): [] kernel_fpu_begin_mask+0x1bb/0x300 ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 63 FAT-fs (loop7): bogus number of reserved sectors FAT-fs (loop7): Can't find a valid FAT filesystem loop2: detected capacity change from 0 to 63 FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem loop1: detected capacity change from 0 to 63 FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop1): bogus number of reserved sectors FAT-fs (loop1): Can't find a valid FAT filesystem FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem tmpfs: Bad value for 'mpol' process 'syz-executor.7' launched './file1' with NULL argv: empty string added tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) tmpfs: Bad value for 'mpol' FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) UDPLite6: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list tmpfs: Bad value for 'mpol' FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) netlink: 636 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 636 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 636 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 636 bytes leftover after parsing attributes in process `syz-executor.6'. ======================================================= 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. ======================================================= sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. set_capacity_and_notify: 12 callbacks suppressed loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir379895739/syzkaller.zybDk6/39/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. ext4 filesystem being mounted at /syzkaller-testdir379895739/syzkaller.zybDk6/39/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir379895739/syzkaller.zybDk6/40/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir379895739/syzkaller.zybDk6/41/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir379895739/syzkaller.zybDk6/42/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn 9p: Could not find request transport: unixµ8íúæ{!¬ÖZæ;vb+Š¯bTT—&Z$côÆÙÏ„š'øÚÝíXÙY9"Bn Bluetooth: hci7: command 0x0405 tx timeout netlink: 1 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.6'.