loop2: detected capacity change from 0 to 32768 ============================= WARNING: suspicious RCU usage 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0 Not tainted ----------------------------- kernel/sched/core.c:9852 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 no locks held by syz-executor.2/13954. stack backtrace: CPU: 1 PID: 13954 Comm: syz-executor.2 Not tainted 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __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:6597 __might_resched+0x6c/0x218 kernel/sched/core.c:9852 __might_sleep+0x48/0x78 kernel/sched/core.c:9819 do_page_fault+0x214/0x79c arch/arm64/mm/fault.c:603 do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:695 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:831 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:579 __lock_acquire+0x60/0x3084 kernel/locking/lockdep.c:4925 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x5c/0x2a8 fs/reiserfs/xattr.c:152 xattr_lookup+0x34/0x198 fs/reiserfs/xattr.c:395 reiserfs_xattr_get+0x8c/0x6a8 fs/reiserfs/xattr.c:677 reiserfs_get_acl+0x84/0x1ac fs/reiserfs/xattr_acl.c:214 get_acl+0x104/0x398 fs/posix_acl.c:153 check_acl+0x40/0x178 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x270/0x32c fs/namei.c:404 reiserfs_permission+0x4c/0x6c fs/reiserfs/xattr.c:954 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x128/0x244 fs/namei.c:525 may_open+0x1e4/0x2bc fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0xdd0/0x11c4 fs/namei.c:3713 do_filp_open+0xdc/0x1b8 fs/namei.c:3740 do_sys_openat2+0xb8/0x22c fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337 __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:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 ============================= WARNING: suspicious RCU usage 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0 Not tainted ----------------------------- kernel/sched/core.c:9852 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 no locks held by syz-executor.2/13954. stack backtrace: CPU: 1 PID: 13954 Comm: syz-executor.2 Not tainted 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __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:6597 __might_resched+0xb4/0x218 kernel/sched/core.c:9852 __might_sleep+0x48/0x78 kernel/sched/core.c:9819 do_page_fault+0x214/0x79c arch/arm64/mm/fault.c:603 do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:695 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:831 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:579 __lock_acquire+0x60/0x3084 kernel/locking/lockdep.c:4925 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x5c/0x2a8 fs/reiserfs/xattr.c:152 xattr_lookup+0x34/0x198 fs/reiserfs/xattr.c:395 reiserfs_xattr_get+0x8c/0x6a8 fs/reiserfs/xattr.c:677 reiserfs_get_acl+0x84/0x1ac fs/reiserfs/xattr_acl.c:214 get_acl+0x104/0x398 fs/posix_acl.c:153 check_acl+0x40/0x178 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x270/0x32c fs/namei.c:404 reiserfs_permission+0x4c/0x6c fs/reiserfs/xattr.c:954 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x128/0x244 fs/namei.c:525 may_open+0x1e4/0x2bc fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0xdd0/0x11c4 fs/namei.c:3713 do_filp_open+0xdc/0x1b8 fs/namei.c:3740 do_sys_openat2+0xb8/0x22c fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337 __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:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 BUG: sleeping function called from invalid context at arch/arm64/mm/fault.c:603 in_atomic(): 0, irqs_disabled(): 128, non_block: 0, pid: 13954, name: syz-executor.2 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 no locks held by syz-executor.2/13954. irq event stamp: 9237 hardirqs last enabled at (9237): [] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline] hardirqs last enabled at (9237): [] read_seqbegin include/linux/seqlock.h:836 [inline] hardirqs last enabled at (9237): [] lookup_mnt+0x180/0x42c fs/namespace.c:703 hardirqs last disabled at (9236): [] seqcount_lockdep_reader_access include/linux/seqlock.h:101 [inline] hardirqs last disabled at (9236): [] read_seqbegin include/linux/seqlock.h:836 [inline] hardirqs last disabled at (9236): [] lookup_mnt+0x110/0x42c fs/namespace.c:703 softirqs last enabled at (9224): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (9222): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 PID: 13954 Comm: syz-executor.2 Not tainted 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __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:9890 __might_sleep+0x48/0x78 kernel/sched/core.c:9819 do_page_fault+0x214/0x79c arch/arm64/mm/fault.c:603 do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:695 do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:831 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:579 __lock_acquire+0x60/0x3084 kernel/locking/lockdep.c:4925 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x5c/0x2a8 fs/reiserfs/xattr.c:152 xattr_lookup+0x34/0x198 fs/reiserfs/xattr.c:395 reiserfs_xattr_get+0x8c/0x6a8 fs/reiserfs/xattr.c:677 reiserfs_get_acl+0x84/0x1ac fs/reiserfs/xattr_acl.c:214 get_acl+0x104/0x398 fs/posix_acl.c:153 check_acl+0x40/0x178 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x270/0x32c fs/namei.c:404 reiserfs_permission+0x4c/0x6c fs/reiserfs/xattr.c:954 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x128/0x244 fs/namei.c:525 may_open+0x1e4/0x2bc fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0xdd0/0x11c4 fs/namei.c:3713 do_filp_open+0xdc/0x1b8 fs/namei.c:3740 do_sys_openat2+0xb8/0x22c fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337 __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:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 Unable to handle kernel paging request at virtual address 0000000000100150 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=000000016b420000 [0000000000100150] pgd=0800000160c0d003, p4d=0800000160c0d003, pud=080000016a476003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 13954 Comm: syz-executor.2 Tainted: G W 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lock_acquire+0x60/0x3084 kernel/locking/lockdep.c:4925 lr : lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 sp : ffff800014f3b640 x29: ffff800014f3b720 x28: 0000000000000000 x27: 0000000000000000 x26: 0000000000100150 x25: ffff80000879cb48 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000100150 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000003 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000002 x13: 0000000000008000 x12: 0000000000040000 x11: 0000000000015178 x10: ffff800019f40000 x9 : 0000000000000001 x8 : 0000000000000001 x7 : ffff80000879cb48 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000003 x0 : 0000000000100150 Call trace: __lock_acquire+0x60/0x3084 kernel/locking/lockdep.c:4925 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x5c/0x2a8 fs/reiserfs/xattr.c:152 xattr_lookup+0x34/0x198 fs/reiserfs/xattr.c:395 reiserfs_xattr_get+0x8c/0x6a8 fs/reiserfs/xattr.c:677 reiserfs_get_acl+0x84/0x1ac fs/reiserfs/xattr_acl.c:214 get_acl+0x104/0x398 fs/posix_acl.c:153 check_acl+0x40/0x178 fs/namei.c:306 acl_permission_check fs/namei.c:351 [inline] generic_permission+0x270/0x32c fs/namei.c:404 reiserfs_permission+0x4c/0x6c fs/reiserfs/xattr.c:954 do_inode_permission fs/namei.c:458 [inline] inode_permission+0x128/0x244 fs/namei.c:525 may_open+0x1e4/0x2bc fs/namei.c:3185 do_open fs/namei.c:3555 [inline] path_openat+0xdd0/0x11c4 fs/namei.c:3713 do_filp_open+0xdc/0x1b8 fs/namei.c:3740 do_sys_openat2+0xb8/0x22c fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337 __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:637 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: 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