------------[ cut here ]------------ WARNING: CPU: 0 PID: 12001 at fs/kernfs/dir.c:504 kernfs_get fs/kernfs/dir.c:504 [inline] WARNING: CPU: 0 PID: 12001 at fs/kernfs/dir.c:504 __kernfs_remove+0x6f4/0x7d8 fs/kernfs/dir.c:1377 Modules linked in: CPU: 0 PID: 12001 Comm: syz-executor.5 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_get fs/kernfs/dir.c:504 [inline] pc : __kernfs_remove+0x6f4/0x7d8 fs/kernfs/dir.c:1377 lr : kernfs_get fs/kernfs/dir.c:504 [inline] lr : __kernfs_remove+0x6f4/0x7d8 fs/kernfs/dir.c:1377 sp : ffff800013b4b8a0 x29: ffff800013b4b8d0 x28: ffff80000cee8161 x27: 0000000080000001 x26: ffff0000c0011a00 x25: ffff80000d30c000 x24: ffff000100ebc498 x23: ffff00010b748b68 x22: 0000000000000000 x21: ffff000100ebc498 x20: ffff000100ebc498 x19: ffff8000086f7744 x18: 0000000000000182 x17: 0000000000000003 x16: ffff80000db49158 x15: ffff000107b6cf80 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 0000000000006f3b x10: ffff800012a1d000 x9 : ffff8000086f70dc x8 : 0000000000006f3c x7 : ffff8000095d331c x6 : 0000000000000000 x5 : 0000000080180007 x4 : fffffc000403af20 x3 : 0000000080180007 x2 : ffff000100ebc498 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: kernfs_get fs/kernfs/dir.c:504 [inline] __kernfs_remove+0x6f4/0x7d8 fs/kernfs/dir.c:1377 kernfs_remove_by_name_ns+0x68/0xb8 fs/kernfs/dir.c:1589 kernfs_remove_by_name include/linux/kernfs.h:615 [inline] sysfs_remove_link+0x40/0x50 fs/sysfs/symlink.c:152 sysfs_slab_add+0x70/0x274 mm/slub.c:5955 __kmem_cache_create+0x60/0x118 mm/slub.c:4906 create_cache mm/slab_common.c:229 [inline] kmem_cache_create_usercopy+0x19c/0x31c mm/slab_common.c:335 p9_client_create+0x618/0x758 net/9p/client.c:993 v9fs_session_init+0xa4/0x9f0 fs/9p/v9fs.c:408 v9fs_mount+0x6c/0x568 fs/9p/vfs_super.c:126 legacy_get_tree+0x30/0x74 fs/fs_context.c:610 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 712 hardirqs last enabled at (711): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (711): [] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194 hardirqs last disabled at (712): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404 softirqs last enabled at (448): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (446): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Unable to handle kernel paging request at virtual address 0000000000025073 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000143306000 [0000000000025073] pgd=080000013d063003, p4d=080000013d063003, pud=08000001465dd003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 12001 Comm: syz-executor.5 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : slab_alloc mm/slub.c:3256 [inline] pc : __kmem_cache_alloc_lru mm/slub.c:3263 [inline] pc : kmem_cache_alloc+0x17c/0x334 mm/slub.c:3273 lr : slab_pre_alloc_hook mm/slab.h:702 [inline] lr : slab_alloc_node mm/slub.c:3162 [inline] lr : slab_alloc mm/slub.c:3256 [inline] lr : __kmem_cache_alloc_lru mm/slub.c:3263 [inline] lr : kmem_cache_alloc+0x88/0x334 mm/slub.c:3273 sp : ffff800013b4b6b0 x29: ffff800013b4b6c0 x28: ffff000107b6cf80 x27: 0000000000000001 x26: ffff80000d309000 x25: 0000000000000002 x24: 0000000000000000 x23: 0000000000025023 x22: 0000000000000000 x21: ffff8000086f467c x20: ffff0000c01a0000 x19: 0000000000000dc0 x18: 000000000000021e x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff000107b6cf80 x14: 0000000000000010 x13: 0000000000000000 x12: 0000000000040000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000050 x8 : 0000000000095179 x7 : ffff8000084b15e8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000095181 x2 : 0000000000000000 x1 : 00000000000000a8 x0 : 0000000000000000 Call trace: next_tid mm/slub.c:2316 [inline] slab_alloc_node mm/slub.c:3232 [inline] slab_alloc mm/slub.c:3256 [inline] __kmem_cache_alloc_lru mm/slub.c:3263 [inline] kmem_cache_alloc+0x17c/0x334 mm/slub.c:3273 kmem_cache_zalloc include/linux/slab.h:723 [inline] __kernfs_new_node+0x74/0x2d0 fs/kernfs/dir.c:593 kernfs_new_node+0x60/0xf0 fs/kernfs/dir.c:655 __kernfs_create_file+0x60/0x188 fs/kernfs/file.c:1050 sysfs_add_file_mode_ns+0xf8/0x1b4 fs/sysfs/file.c:294 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x22c/0x654 fs/sysfs/group.c:148 sysfs_create_group+0x2c/0x3c fs/sysfs/group.c:174 sysfs_slab_add+0x15c/0x274 mm/slub.c:5972 __kmem_cache_create+0x60/0x118 mm/slub.c:4906 create_cache mm/slab_common.c:229 [inline] kmem_cache_create_usercopy+0x19c/0x31c mm/slab_common.c:335 p9_client_create+0x618/0x758 net/9p/client.c:993 v9fs_session_init+0xa4/0x9f0 fs/9p/v9fs.c:408 v9fs_mount+0x6c/0x568 fs/9p/vfs_super.c:126 legacy_get_tree+0x30/0x74 fs/fs_context.c:610 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: 54000e01 34000e1b b9402a89 91002103 (f8696af8) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 54000e01 b.ne 0x1c0 // b.any 4: 34000e1b cbz w27, 0x1c4 8: b9402a89 ldr w9, [x20, #40] c: 91002103 add x3, x8, #0x8 * 10: f8696af8 ldr x24, [x23, x9] <-- trapping instruction