------------[ cut here ]------------ WARNING: CPU: 0 PID: 3127 at mm/slab_common.c:923 free_large_kmalloc+0x3c/0x144 mm/slab_common.c:924 Modules linked in: CPU: 0 PID: 3127 Comm: syz-executor.1 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : free_large_kmalloc+0x3c/0x144 mm/slab_common.c:924 lr : kfree+0xb8/0x118 mm/slab_common.c:1001 sp : ffff800010fe3ba0 x29: ffff800010fe3ba0 x28: ffff00010bdc0000 x27: 0000000000000000 x26: 00000000000000c0 x25: 0000000000000002 x24: ffff00011959cd00 x23: ffff80000d5a8000 x22: ffff000116d75338 x21: 0000000040000000 x20: ffff800008d5ab24 x19: fffffc000458e000 x18: 0000000000000112 x17: ffff80000c0cd83c x16: ffff80000dbe6158 x15: ffff00010bdc0000 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff00010bdc0000 x11: ff8080000805b050 x10: 0000000000000000 x9 : fffffc0000000000 x8 : ffff80000d95e000 x7 : ffff800009452fdc x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : ffffffffffffffff x1 : ffff000116380000 x0 : fffffc000458e000 Call trace: free_large_kmalloc+0x3c/0x144 mm/slab_common.c:924 kfree+0xb8/0x118 mm/slab_common.c:1001 diUnmount+0x74/0x8c fs/jfs/jfs_imap.c:195 jfs_umount+0x94/0x190 fs/jfs/jfs_umount.c:63 jfs_put_super+0x6c/0x104 fs/jfs/super.c:194 generic_shutdown_super+0x94/0x198 fs/super.c:492 kill_block_super+0x30/0x78 fs/super.c:1428 deactivate_locked_super+0x70/0xe8 fs/super.c:332 deactivate_super+0xd0/0xd4 fs/super.c:363 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 4074920 hardirqs last enabled at (4074919): [] call_rcu+0x300/0x494 kernel/rcu/tree.c:2833 hardirqs last disabled at (4074920): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (4074590): [] _stext+0x2e4/0x37c softirqs last disabled at (4074563): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- object pointer: 0x000000006e3b12e4 page:000000001481f5ed refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x156380 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 ffff0001feff4c20 fffffc0004943a08 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:757! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3127 Comm: syz-executor.1 Tainted: G W 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : put_page_testzero include/linux/mm.h:757 [inline] pc : __free_pages+0xc0/0x168 mm/page_alloc.c:5643 lr : put_page_testzero include/linux/mm.h:757 [inline] lr : __free_pages+0xc0/0x168 mm/page_alloc.c:5643 sp : ffff800010fe3b70 x29: ffff800010fe3b70 x28: ffff00010bdc0000 x27: 0000000000000000 x26: 00000000000000c0 x25: 0000000000000002 x24: ffff00011959cd00 x23: ffff80000d5a8000 x22: 0000000000000000 x21: fffffffffffff000 x20: 0000000000000000 x19: fffffc000458e000 x18: 00000000000001da x17: ffff80000c0cd83c x16: ffff80000dbe6158 x15: ffff00010bdc0000 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff00010bdc0000 x11: ff808000081c4d64 x10: 0000000000000000 x9 : bc591aa07e57f500 x8 : bc591aa07e57f500 x7 : ffff80000816678c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefbecd0 x1 : 0000000100000000 x0 : 000000000000003e Call trace: put_page_testzero include/linux/mm.h:757 [inline] __free_pages+0xc0/0x168 mm/page_alloc.c:5643 free_large_kmalloc+0xac/0x144 mm/slab_common.c:932 kfree+0xb8/0x118 mm/slab_common.c:1001 diUnmount+0x74/0x8c fs/jfs/jfs_imap.c:195 jfs_umount+0x94/0x190 fs/jfs/jfs_umount.c:63 jfs_put_super+0x6c/0x104 fs/jfs/super.c:194 generic_shutdown_super+0x94/0x198 fs/super.c:492 kill_block_super+0x30/0x78 fs/super.c:1428 deactivate_locked_super+0x70/0xe8 fs/super.c:332 deactivate_super+0xd0/0xd4 fs/super.c:363 cleanup_mnt+0x184/0x1c0 fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 Code: f0023741 9139f021 aa1303e0 97fe8865 (d4210000) ---[ end trace 0000000000000000 ]---