------------[ cut here ]------------ WARNING: CPU: 1 PID: 15047 at fs/kernfs/dir.c:504 kernfs_get fs/kernfs/dir.c:504 [inline] WARNING: CPU: 1 PID: 15047 at fs/kernfs/dir.c:504 __kernfs_remove+0x6e4/0x7b8 fs/kernfs/dir.c:1377 Modules linked in: CPU: 1 PID: 15047 Comm: syz-executor.2 Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_get fs/kernfs/dir.c:504 [inline] pc : __kernfs_remove+0x6e4/0x7b8 fs/kernfs/dir.c:1377 lr : kernfs_get fs/kernfs/dir.c:504 [inline] lr : __kernfs_remove+0x6e4/0x7b8 fs/kernfs/dir.c:1377 sp : ffff800015ff38a0 x29: ffff800015ff38d0 x28: ffff80000cf35761 x27: 0000000080000001 x26: ffff0000c0011800 x25: ffff80000d37c000 x24: ffff0000eb5b3b28 x23: ffff0000eb5b36d0 x22: 0000000000000000 x21: ffff0000eb5b3b28 x20: ffff0000eb5b3b28 x19: ffff800008702970 x18: 0000000000000156 x17: ffff80000c04d6bc x16: ffff80000dbb8658 x15: ffff0000cb47b500 x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000 x11: 0000000000006adb x10: ffff800018533000 x9 : ffff800008702360 x8 : 0000000000006adc x7 : ffff8000095ef734 x6 : 0000000000000000 x5 : 0000000080180000 x4 : fffffc0003ad6ce0 x3 : 0000000080180000 x2 : ffff0000eb5b3b28 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: kernfs_get fs/kernfs/dir.c:504 [inline] __kernfs_remove+0x6e4/0x7b8 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+0x70/0x260 mm/slub.c:5943 __kmem_cache_create+0x60/0x118 mm/slub.c:4899 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/0x548 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 irq event stamp: 590 hardirqs last enabled at (589): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (589): [] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194 hardirqs last disabled at (590): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395 softirqs last enabled at (532): [] _stext+0x2e4/0x37c softirqs last disabled at (493): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (493): [] invoke_softirq+0x70/0xbc kernel/softirq.c:452 ---[ end trace 0000000000000000 ]--- sysfs: cannot create duplicate filename '/kernel/slab/9p-fcall-cache/poison' CPU: 0 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call trace: dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 sysfs_warn_dup+0x74/0x90 fs/sysfs/dir.c:30 sysfs_add_file_mode_ns+0x158/0x1b4 fs/sysfs/file.c:298 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+0x150/0x260 mm/slub.c:5958 __kmem_cache_create+0x60/0x118 mm/slub.c:4899 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/0x548 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 15047 at fs/kernfs/dir.c:504 kernfs_get fs/kernfs/dir.c:504 [inline] WARNING: CPU: 1 PID: 15047 at fs/kernfs/dir.c:504 __kernfs_remove+0x6e4/0x7b8 fs/kernfs/dir.c:1377 Modules linked in: CPU: 1 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kernfs_get fs/kernfs/dir.c:504 [inline] pc : __kernfs_remove+0x6e4/0x7b8 fs/kernfs/dir.c:1377 lr : kernfs_get fs/kernfs/dir.c:504 [inline] lr : __kernfs_remove+0x6e4/0x7b8 fs/kernfs/dir.c:1377 sp : ffff800015ff3820 x29: ffff800015ff3850 x28: 0000000000000100 x27: ffff80000d4d99b0 x26: 0000000000000000 x25: ffff80000d37c000 x24: 0000000000000000 x23: ffff0000eb5b3b28 x22: 0000000000000000 x21: ffff0000eb5b3b28 x20: ffff0000eb5b3b28 x19: ffff800008702970 x18: 0000000000000182 x17: 6e69676e45206574 x16: ffff80000dbb8658 x15: ffff0000cb47b500 x14: 0000000000000008 x13: 00000000ffffffff x12: 0000000000040000 x11: 00000000000364be x10: ffff800018533000 x9 : ffff800008702360 x8 : 00000000000364bf x7 : 7f7f7f7f7f7f7f7f x6 : 0000800000000000 x5 : 0000000000000000 x4 : 0000000000800000 x3 : 00524f4345450000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: kernfs_get fs/kernfs/dir.c:504 [inline] __kernfs_remove+0x6e4/0x7b8 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] remove_files fs/sysfs/group.c:28 [inline] create_files fs/sysfs/group.c:70 [inline] internal_create_group+0x424/0x654 fs/sysfs/group.c:148 sysfs_create_group+0x2c/0x3c fs/sysfs/group.c:174 sysfs_slab_add+0x150/0x260 mm/slub.c:5958 __kmem_cache_create+0x60/0x118 mm/slub.c:4899 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/0x548 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 irq event stamp: 1100 hardirqs last enabled at (1099): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1099): [] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194 hardirqs last disabled at (1100): [] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:395 softirqs last enabled at (1076): [] _stext+0x2e4/0x37c softirqs last disabled at (1057): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (1057): [] invoke_softirq+0x70/0xbc kernel/softirq.c:452 ---[ end trace 0000000000000000 ]--- kmem_cache_create_usercopy(9p-fcall-cache) failed with error -17 CPU: 0 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call trace: dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 kmem_cache_create_usercopy+0x268/0x31c mm/slab_common.c:353 p9_client_create+0x618/0x758 net/9p/client.c:993 v9fs_session_init+0xa4/0x9f0 fs/9p/v9fs.c:408 v9fs_mount+0x6c/0x548 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 ============================= WARNING: suspicious RCU usage 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Tainted: G W ----------------------------- kernel/sched/core.c:9854 Illegal context switch in RCU-bh read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.2/15047: #0: ffff000101ccd0e0 (&type->s_umount_key#63/1){+.+.}-{3:3}, at: alloc_super+0xf8/0x420 fs/super.c:228 stack backtrace: CPU: 0 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call trace: dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x138/0x154 kernel/locking/lockdep.c:6595 __might_resched+0x6c/0x218 kernel/sched/core.c:9854 __might_sleep+0x48/0x78 kernel/sched/core.c:9821 do_page_fault+0x214/0x79c arch/arm64/mm/fault.c:593 do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:685 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:818 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:366 el1h_64_sync_handler+0x5c/0x98 arch/arm64/kernel/entry-common.c:417 el1h_64_sync+0x64/0x68 __lock_acquire+0x60/0x30a4 kernel/locking/lockdep.c:4923 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 down_write+0x5c/0xb8 kernel/locking/rwsem.c:1552 kernfs_add_one+0x44/0x2d4 fs/kernfs/dir.c:734 __kernfs_create_file+0x13c/0x188 fs/kernfs/file.c:1079 sysfs_add_file_mode_ns+0xf8/0x1b4 fs/sysfs/file.c:294 sysfs_create_file_ns+0x7c/0xc4 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:623 [inline] device_create_file drivers/base/core.c:2875 [inline] device_add+0x38c/0x958 drivers/base/core.c:3461 device_create_groups_vargs+0xf4/0x15c drivers/base/core.c:4194 device_create+0x88/0xbc drivers/base/core.c:4236 bdi_register_va+0x8c/0x318 mm/backing-dev.c:873 super_setup_bdi_name+0x84/0x120 fs/super.c:1589 super_setup_bdi+0x50/0x78 fs/super.c:1611 v9fs_fill_super fs/9p/vfs_super.c:76 [inline] v9fs_mount+0x1a4/0x548 fs/9p/vfs_super.c:137 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 ============================= WARNING: suspicious RCU usage 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Tainted: G W ----------------------------- kernel/sched/core.c:9854 Illegal context switch in RCU-sched read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.2/15047: #0: ffff000101ccd0e0 (&type->s_umount_key#63/1){+.+.}-{3:3}, at: alloc_super+0xf8/0x420 fs/super.c:228 stack backtrace: CPU: 0 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call trace: dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lockdep_rcu_suspicious+0x138/0x154 kernel/locking/lockdep.c:6595 __might_resched+0xb4/0x218 kernel/sched/core.c:9854 __might_sleep+0x48/0x78 kernel/sched/core.c:9821 do_page_fault+0x214/0x79c arch/arm64/mm/fault.c:593 do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:685 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:818 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:366 el1h_64_sync_handler+0x5c/0x98 arch/arm64/kernel/entry-common.c:417 el1h_64_sync+0x64/0x68 __lock_acquire+0x60/0x30a4 kernel/locking/lockdep.c:4923 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 down_write+0x5c/0xb8 kernel/locking/rwsem.c:1552 kernfs_add_one+0x44/0x2d4 fs/kernfs/dir.c:734 __kernfs_create_file+0x13c/0x188 fs/kernfs/file.c:1079 sysfs_add_file_mode_ns+0xf8/0x1b4 fs/sysfs/file.c:294 sysfs_create_file_ns+0x7c/0xc4 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:623 [inline] device_create_file drivers/base/core.c:2875 [inline] device_add+0x38c/0x958 drivers/base/core.c:3461 device_create_groups_vargs+0xf4/0x15c drivers/base/core.c:4194 device_create+0x88/0xbc drivers/base/core.c:4236 bdi_register_va+0x8c/0x318 mm/backing-dev.c:873 super_setup_bdi_name+0x84/0x120 fs/super.c:1589 super_setup_bdi+0x50/0x78 fs/super.c:1611 v9fs_fill_super fs/9p/vfs_super.c:76 [inline] v9fs_mount+0x1a4/0x548 fs/9p/vfs_super.c:137 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 BUG: sleeping function called from invalid context at arch/arm64/mm/fault.c:593 in_atomic(): 0, irqs_disabled(): 128, non_block: 0, pid: 15047, name: syz-executor.2 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz-executor.2/15047: #0: ffff000101ccd0e0 (&type->s_umount_key#63/1){+.+.}-{3:3}, at: alloc_super+0xf8/0x420 fs/super.c:228 irq event stamp: 1647 hardirqs last enabled at (1647): [] ___slab_alloc+0x778/0x880 mm/slub.c:2986 hardirqs last disabled at (1646): [] ___slab_alloc+0x540/0x880 mm/slub.c:2953 softirqs last enabled at (1368): [] _stext+0x2e4/0x37c softirqs last disabled at (1231): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (1231): [] invoke_softirq+0x70/0xbc kernel/softirq.c:452 CPU: 0 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call trace: dump_backtrace+0x1b0/0x1dc arch/arm64/kernel/stacktrace.c:182 show_stack+0x2c/0x64 arch/arm64/kernel/stacktrace.c:189 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 __might_resched+0x208/0x218 kernel/sched/core.c:9892 __might_sleep+0x48/0x78 kernel/sched/core.c:9821 do_page_fault+0x214/0x79c arch/arm64/mm/fault.c:593 do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:685 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:818 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:366 el1h_64_sync_handler+0x5c/0x98 arch/arm64/kernel/entry-common.c:417 el1h_64_sync+0x64/0x68 __lock_acquire+0x60/0x30a4 kernel/locking/lockdep.c:4923 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 down_write+0x5c/0xb8 kernel/locking/rwsem.c:1552 kernfs_add_one+0x44/0x2d4 fs/kernfs/dir.c:734 __kernfs_create_file+0x13c/0x188 fs/kernfs/file.c:1079 sysfs_add_file_mode_ns+0xf8/0x1b4 fs/sysfs/file.c:294 sysfs_create_file_ns+0x7c/0xc4 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:623 [inline] device_create_file drivers/base/core.c:2875 [inline] device_add+0x38c/0x958 drivers/base/core.c:3461 device_create_groups_vargs+0xf4/0x15c drivers/base/core.c:4194 device_create+0x88/0xbc drivers/base/core.c:4236 bdi_register_va+0x8c/0x318 mm/backing-dev.c:873 super_setup_bdi_name+0x84/0x120 fs/super.c:1589 super_setup_bdi+0x50/0x78 fs/super.c:1611 v9fs_fill_super fs/9p/vfs_super.c:76 [inline] v9fs_mount+0x1a4/0x548 fs/9p/vfs_super.c:137 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Unable to handle kernel paging request at virtual address 0000000000001148 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=00000001563dd000 [0000000000001148] pgd=080000012b6cc003, p4d=080000012b6cc003, pud=080000013f38f003, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 15047 Comm: syz-executor.2 Tainted: G W 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lock_acquire+0x60/0x30a4 kernel/locking/lockdep.c:4923 lr : lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 sp : ffff800015ff35e0 x29: ffff800015ff36c0 x28: 0000000000000000 x27: 0000000000000000 x26: 0000000000001148 x25: ffff8000086ffe10 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000001148 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000000 x18: 00000000000003c4 x17: ffff80000c04d6bc x16: ffff80000dbb8658 x15: ffff0000cb47b500 x14: 0000000000000008 x13: 00000000ffffffff x12: 0000000000040000 x11: 000000000003ffff x10: ffff800018533000 x9 : 0000000000000001 x8 : 0000000000000001 x7 : ffff8000086ffe10 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000001148 Call trace: __lock_acquire+0x60/0x30a4 kernel/locking/lockdep.c:4923 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 down_write+0x5c/0xb8 kernel/locking/rwsem.c:1552 kernfs_add_one+0x44/0x2d4 fs/kernfs/dir.c:734 __kernfs_create_file+0x13c/0x188 fs/kernfs/file.c:1079 sysfs_add_file_mode_ns+0xf8/0x1b4 fs/sysfs/file.c:294 sysfs_create_file_ns+0x7c/0xc4 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:623 [inline] device_create_file drivers/base/core.c:2875 [inline] device_add+0x38c/0x958 drivers/base/core.c:3461 device_create_groups_vargs+0xf4/0x15c drivers/base/core.c:4194 device_create+0x88/0xbc drivers/base/core.c:4236 bdi_register_va+0x8c/0x318 mm/backing-dev.c:873 super_setup_bdi_name+0x84/0x120 fs/super.c:1589 super_setup_bdi+0x50/0x78 fs/super.c:1611 v9fs_fill_super fs/9p/vfs_super.c:76 [inline] v9fs_mount+0x1a4/0x548 fs/9p/vfs_super.c:137 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+0x2f8/0x408 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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: 2a0303f4 2a0203f7 aa0003fa 34000148 (f9400348) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 2a0303f4 mov w20, w3 4: 2a0203f7 mov w23, w2 8: aa0003fa mov x26, x0 c: 34000148 cbz w8, 0x34 * 10: f9400348 ldr x8, [x26] <-- trapping instruction