RAX: ffffffffffffffda RBX: 00007f9f9c5b5fa0 RCX: 00007f9f9c38e969 RDX: 0000000000000000 RSI: 0000000000001269 RDI: 0000000000000003 RBP: 00007f9f9d1f8090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f9f9c5b5fa0 R15: 00007fff485309d8 </TASK> ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7452 at drivers/mtd/mtdpart.c:37 release_mtd_partition+0x71/0x90 drivers/mtd/mtdpart.c:37 Modules linked in: CPU: 0 UID: 0 PID: 7452 Comm: syz.1.368 Tainted: G U 6.15.0-syzkaller-08486-gf66bc387efbe #0 PREEMPT(full) Tainted: [U]=USER Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:release_mtd_partition+0x71/0x90 drivers/mtd/mtdpart.c:37 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 1e 48 8b 7b 38 e8 7f 57 af fb 48 89 df 5b 5d e9 75 57 af fb e8 30 b2 54 fb 90 <0f> 0b 90 eb c2 e8 05 4a ba fb eb db 48 89 ef e8 fb 49 ba fb eb a5 RSP: 0018:ffffc90003d0f840 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888063214000 RCX: ffffffff8b7351cd RDX: ffff88802c9c5a00 RSI: ffffffff86669420 RDI: ffff888063214000 RBP: ffff888063214648 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000006 R11: 0000000000000001 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888143ada700 R15: 0000000000000000 FS: 00007f9f9d1f86c0(0000) GS:ffff88812497f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558273491078 CR3: 000000005104e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> mtd_release+0xa0/0xd0 drivers/mtd/mtdcore.c:101 device_release+0xa1/0x240 drivers/base/core.c:2568 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e7/0x5a0 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3800 add_mtd_device+0xbc7/0x1720 drivers/mtd/mtdcore.c:752 mtd_add_partition+0x30c/0x670 drivers/mtd/mtdpart.c:279 mtdchar_blkpg_ioctl+0x20b/0x250 drivers/mtd/mtdchar.c:562 mtdchar_ioctl+0xbc4/0x2090 drivers/mtd/mtdchar.c:1216 mtdchar_unlocked_ioctl+0xb0/0xf0 drivers/mtd/mtdchar.c:1239 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9f9c38e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9f9d1f8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9f9c5b5fa0 RCX: 00007f9f9c38e969 RDX: 0000000000000000 RSI: 0000000000001269 RDI: 0000000000000003 RBP: 00007f9f9d1f8090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f9f9c5b5fa0 R15: 00007fff485309d8 </TASK>