=============================
WARNING: suspicious RCU usage
6.0.0-rc3-syzkaller-16800-g85413d1e802e #0 Not tainted
-----------------------------
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
3 locks held by syz-executor.5/10211:
#0: ffff0000c9421270 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x5c/0x5e0 fs/seq_file.c:182
#1: ffff80000d82d328 (binder_procs_lock){+.+.}-{3:3}, at: stats_show+0x60/0x3e0 drivers/android/binder.c:6350
#2: ffff0000fbd61a48 (&alloc->mutex){+.+.}-{3:3}, at: binder_alloc_print_pages+0x38/0x218 drivers/android/binder_alloc.c:930
stack backtrace:
CPU: 0 PID: 10211 Comm: syz-executor.5 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #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_read+0x5c/0x78 kernel/locking/rwsem.c:1499
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
binder_alloc_print_pages+0x48/0x218 drivers/android/binder_alloc.c:936
print_binder_proc_stats drivers/android/binder.c:6289 [inline]
stats_show+0x2d8/0x3e0 drivers/android/binder.c:6352
seq_read_iter+0x220/0x5e0 fs/seq_file.c:230
seq_read+0x98/0xd0 fs/seq_file.c:162
full_proxy_read+0x94/0x140 fs/debugfs/file.c:231
do_iter_read+0x1f0/0x55c fs/read_write.c:792
vfs_readv fs/read_write.c:910 [inline]
do_preadv+0x128/0x1dc fs/read_write.c:1002
__do_sys_preadv fs/read_write.c:1052 [inline]
__se_sys_preadv fs/read_write.c:1047 [inline]
__arm64_sys_preadv+0x28/0x38 fs/read_write.c:1047
__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-rc3-syzkaller-16800-g85413d1e802e #0 Not tainted
-----------------------------
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
3 locks held by syz-executor.5/10211:
#0: ffff0000c9421270 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x5c/0x5e0 fs/seq_file.c:182
#1: ffff80000d82d328 (binder_procs_lock){+.+.}-{3:3}, at: stats_show+0x60/0x3e0 drivers/android/binder.c:6350
#2: ffff0000fbd61a48 (&alloc->mutex){+.+.}-{3:3}, at: binder_alloc_print_pages+0x38/0x218 drivers/android/binder_alloc.c:930
stack backtrace:
CPU: 0 PID: 10211 Comm: syz-executor.5 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #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_read+0x5c/0x78 kernel/locking/rwsem.c:1499
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
binder_alloc_print_pages+0x48/0x218 drivers/android/binder_alloc.c:936
print_binder_proc_stats drivers/android/binder.c:6289 [inline]
stats_show+0x2d8/0x3e0 drivers/android/binder.c:6352
seq_read_iter+0x220/0x5e0 fs/seq_file.c:230
seq_read+0x98/0xd0 fs/seq_file.c:162
full_proxy_read+0x94/0x140 fs/debugfs/file.c:231
do_iter_read+0x1f0/0x55c fs/read_write.c:792
vfs_readv fs/read_write.c:910 [inline]
do_preadv+0x128/0x1dc fs/read_write.c:1002
__do_sys_preadv fs/read_write.c:1052 [inline]
__se_sys_preadv fs/read_write.c:1047 [inline]
__arm64_sys_preadv+0x28/0x38 fs/read_write.c:1047
__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: 10211, name: syz-executor.5
preempt_count: 0, expected: 0
RCU nest depth: 0, expected: 0
3 locks held by syz-executor.5/10211:
#0: ffff0000c9421270 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0x5c/0x5e0 fs/seq_file.c:182
#1: ffff80000d82d328 (binder_procs_lock){+.+.}-{3:3}, at: stats_show+0x60/0x3e0 drivers/android/binder.c:6350
#2: ffff0000fbd61a48 (&alloc->mutex){+.+.}-{3:3}, at: binder_alloc_print_pages+0x38/0x218 drivers/android/binder_alloc.c:930
irq event stamp: 187
hardirqs last enabled at (187): [<ffff80000856a7dc>] mod_objcg_state+0x19c/0x204 mm/memcontrol.c:3158
hardirqs last disabled at (186): [<ffff80000856a768>] mod_objcg_state+0x128/0x204 mm/memcontrol.c:3105
softirqs last enabled at (170): [<ffff80000801c1f4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (168): [<ffff80000801c1c0>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 0 PID: 10211 Comm: syz-executor.5 Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #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_read+0x5c/0x78 kernel/locking/rwsem.c:1499
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
binder_alloc_print_pages+0x48/0x218 drivers/android/binder_alloc.c:936
print_binder_proc_stats drivers/android/binder.c:6289 [inline]
stats_show+0x2d8/0x3e0 drivers/android/binder.c:6352
seq_read_iter+0x220/0x5e0 fs/seq_file.c:230
seq_read+0x98/0xd0 fs/seq_file.c:162
full_proxy_read+0x94/0x140 fs/debugfs/file.c:231
do_iter_read+0x1f0/0x55c fs/read_write.c:792
vfs_readv fs/read_write.c:910 [inline]
do_preadv+0x128/0x1dc fs/read_write.c:1002
__do_sys_preadv fs/read_write.c:1052 [inline]
__se_sys_preadv fs/read_write.c:1047 [inline]
__arm64_sys_preadv+0x28/0x38 fs/read_write.c:1047
__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 NULL pointer dereference at virtual address 0000000000000118
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=000000014013c000
[0000000000000118] pgd=08000001474b6003, p4d=08000001474b6003, pud=080000014754f003, pmd=0000000000000000
Internal error: Oops: 96000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 10211 Comm: syz-executor.5 Tainted: G W 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
pstate: 804000c5 (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 : ffff800020143840
x29: ffff800020143920 x28: 0000000000000000 x27: 0000000000000000
x26: 0000000000000118 x25: ffff80000aff1fcc x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000118 x21: 0000000000000000
x20: 0000000000000001 x19: 0000000000000000 x18: 00000000000000c0
x17: ffff80000dd7a698 x16: ffff80000dbb8658 x15: ffff0000fede9a80
x14: 0000000000000130 x13: 00000000ffffffff x12: 0000000000040000
x11: 0000000000002918 x10: ffff800012c5f000 x9 : 0000000000000001
x8 : 0000000000000001 x7 : ffff80000aff1fcc x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000118
Call trace:
__lock_acquire+0x60/0x30a4 kernel/locking/lockdep.c:4923
lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666
down_read+0x5c/0x78 kernel/locking/rwsem.c:1499
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
binder_alloc_print_pages+0x48/0x218 drivers/android/binder_alloc.c:936
print_binder_proc_stats drivers/android/binder.c:6289 [inline]
stats_show+0x2d8/0x3e0 drivers/android/binder.c:6352
seq_read_iter+0x220/0x5e0 fs/seq_file.c:230
seq_read+0x98/0xd0 fs/seq_file.c:162
full_proxy_read+0x94/0x140 fs/debugfs/file.c:231
do_iter_read+0x1f0/0x55c fs/read_write.c:792
vfs_readv fs/read_write.c:910 [inline]
do_preadv+0x128/0x1dc fs/read_write.c:1002
__do_sys_preadv fs/read_write.c:1052 [inline]
__se_sys_preadv fs/read_write.c:1047 [inline]
__arm64_sys_preadv+0x28/0x38 fs/read_write.c:1047
__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