Extracting prog: 1m16.276567164s
Minimizing prog: 7m35.836347037s
Simplifying prog options: 6m6.201008787s
Extracting C: 1m44.107219805s
Simplifying C: 0s
extracting reproducer from 30 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP-ioctl$BLKTRACESTART
detailed listing:
executing program 0:
r0 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x401)
ioctl$BLKTRACESETUP(r0, 0xc0481273, &(0x7f0000000540)={'\x00', 0x7ff, 0x6, 0xc, 0x100000001, 0x59f})
ioctl$BLKTRACESTART(r0, 0x1274, 0x0)
program crashed: possible deadlock in blk_trace_setup
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=54.214859806s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
detailed listing:
executing program 0:
r0 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x401)
ioctl$BLKTRACESETUP(r0, 0xc0481273, &(0x7f0000000540)={'\x00', 0x7ff, 0x6, 0xc, 0x100000001, 0x59f})
program crashed: possible deadlock in blk_trace_setup
testing program (duration=54.214859806s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg
detailed listing:
executing program 0:
syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x401)
program did not crash
testing program (duration=54.214859806s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): ioctl$BLKTRACESETUP
detailed listing:
executing program 0:
ioctl$BLKTRACESETUP(0xffffffffffffffff, 0xc0481273, &(0x7f0000000540)={'\x00', 0x7ff, 0x6, 0xc, 0x100000001, 0x59f})
program did not crash
testing program (duration=54.214859806s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
detailed listing:
executing program 0:
r0 = syz_open_dev$sg(0x0, 0x0, 0x401)
ioctl$BLKTRACESETUP(r0, 0xc0481273, &(0x7f0000000540)={'\x00', 0x7ff, 0x6, 0xc, 0x100000001, 0x59f})
program did not crash
testing program (duration=54.214859806s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
detailed listing:
executing program 0:
r0 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x401)
ioctl$BLKTRACESETUP(r0, 0xc0481273, 0x0)
program crashed: possible deadlock in blk_trace_setup
extracting C reproducer
testing compiled C program (duration=54.214859806s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
program did not crash
simplifying guilty program options
testing program (duration=54.214859806s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
detailed listing:
executing program 0:
r0 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x401)
ioctl$BLKTRACESETUP(r0, 0xc0481273, 0x0)
program crashed: possible deadlock in blk_trace_setup
extracting C reproducer
testing compiled C program (duration=54.214859806s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
program did not crash
testing program (duration=54.214859806s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
detailed listing:
executing program 0:
r0 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x401)
ioctl$BLKTRACESETUP(r0, 0xc0481273, 0x0)
program crashed: possible deadlock in blk_trace_setup
extracting C reproducer
testing compiled C program (duration=54.214859806s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_dev$sg-ioctl$BLKTRACESETUP
program did not crash
reproducing took 17m28.283612961s
repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
6.12.0-rc5-next-20241031-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.15/5979 is trying to acquire lock:
ffff88807dd03de0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0xaa/0x120 mm/memory.c:6751
but task is already holding lock:
ffff88802616e030 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0xb0/0x1e0 kernel/trace/blktrace.c:647
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&q->debugfs_mutex){+.+.}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
blk_mq_init_sched+0x3fa/0x830 block/blk-mq-sched.c:473
elevator_init_mq+0x1d8/0x2d0 block/elevator.c:605
add_disk_fwnode+0x10d/0xf80 block/genhd.c:413
sd_probe+0xba6/0x1100 drivers/scsi/sd.c:4024
really_probe+0x2b8/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459
__device_attach_async_helper+0x22d/0x300 drivers/base/dd.c:987
async_run_entry_fn+0xa8/0x420 kernel/async.c:129
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #3 (&q->q_usage_counter(io)#66){++++}-{0:0}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
bio_queue_enter block/blk.h:75 [inline]
blk_mq_submit_bio+0x1510/0x2490 block/blk-mq.c:3069
__submit_bio+0x2c2/0x560 block/blk-core.c:629
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:739
ext4_mpage_readpages+0x1cdc/0x1ea0 fs/ext4/readpage.c:389
read_pages+0x17e/0x840 mm/readahead.c:160
page_cache_ra_unbounded+0x797/0x8c0 mm/readahead.c:295
page_cache_sync_readahead include/linux/pagemap.h:1397 [inline]
filemap_get_pages+0x621/0x2540 mm/filemap.c:2546
filemap_read+0x46b/0xf50 mm/filemap.c:2646
__kernel_read+0x513/0x9d0 fs/read_write.c:527
prepare_binprm fs/exec.c:1677 [inline]
search_binary_handler fs/exec.c:1726 [inline]
exec_binprm fs/exec.c:1784 [inline]
bprm_execve+0xa2b/0x1770 fs/exec.c:1835
kernel_execve+0x931/0xa50 fs/exec.c:2002
try_to_run_init_process init/main.c:1394 [inline]
kernel_init+0xed/0x2b0 init/main.c:1522
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #2 (mapping.invalidate_lock){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:872 [inline]
filemap_fault+0x6e8/0x1950 mm/filemap.c:3332
__do_fault+0x135/0x460 mm/memory.c:4907
do_shared_fault mm/memory.c:5386 [inline]
do_fault mm/memory.c:5460 [inline]
do_pte_missing mm/memory.c:3979 [inline]
handle_pte_fault+0x1139/0x66b0 mm/memory.c:5801
__handle_mm_fault mm/memory.c:5944 [inline]
handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6112
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
-> #1 (&vma->vm_lock->lock){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_write+0x99/0x220 kernel/locking/rwsem.c:1577
vma_start_write include/linux/mm.h:769 [inline]
vma_link+0x28c/0x500 mm/vma.c:1687
insert_vm_struct+0x2f7/0x410 mm/mmap.c:1765
__bprm_mm_init fs/exec.c:289 [inline]
bprm_mm_init fs/exec.c:393 [inline]
alloc_bprm+0xa54/0xe60 fs/exec.c:1538
kernel_execve+0x99/0xa50 fs/exec.c:1967
try_to_run_init_process init/main.c:1394 [inline]
kernel_init+0xed/0x2b0 init/main.c:1522
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (&mm->mmap_lock){++++}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__might_fault+0xc6/0x120 mm/memory.c:6751
_inline_copy_from_user include/linux/uaccess.h:162 [inline]
_copy_from_user+0x2a/0xc0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:212 [inline]
__blk_trace_setup kernel/trace/blktrace.c:626 [inline]
blk_trace_setup+0xd2/0x1e0 kernel/trace/blktrace.c:648
sg_ioctl_common drivers/scsi/sg.c:1121 [inline]
sg_ioctl+0xa46/0x2e80 drivers/scsi/sg.c:1163
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&mm->mmap_lock --> &q->q_usage_counter(io)#66 --> &q->debugfs_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->debugfs_mutex);
lock(&q->q_usage_counter(io)#66);
lock(&q->debugfs_mutex);
rlock(&mm->mmap_lock);
*** DEADLOCK ***
1 lock held by syz.0.15/5979:
#0: ffff88802616e030 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0xb0/0x1e0 kernel/trace/blktrace.c:647
stack backtrace:
CPU: 1 UID: 0 PID: 5979 Comm: syz.0.15 Not tainted 6.12.0-rc5-next-20241031-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__might_fault+0xc6/0x120 mm/memory.c:6751
_inline_copy_from_user include/linux/uaccess.h:162 [inline]
_copy_from_user+0x2a/0xc0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:212 [inline]
__blk_trace_setup kernel/trace/blktrace.c:626 [inline]
blk_trace_setup+0xd2/0x1e0 kernel/trace/blktrace.c:648
sg_ioctl_common drivers/scsi/sg.c:1121 [inline]
sg_ioctl+0xa46/0x2e80 drivers/scsi/sg.c:1163
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd37077e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffaaeab888 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd370935f80 RCX: 00007fd37077e719
RDX: 0000000000000000 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 00007fd3707f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd370935f80 R14: 00007fd370935f80 R15: 0000000000000304
final repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
6.12.0-rc5-next-20241031-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.15/5979 is trying to acquire lock:
ffff88807dd03de0 (&mm->mmap_lock){++++}-{4:4}, at: __might_fault+0xaa/0x120 mm/memory.c:6751
but task is already holding lock:
ffff88802616e030 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0xb0/0x1e0 kernel/trace/blktrace.c:647
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&q->debugfs_mutex){+.+.}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
blk_mq_init_sched+0x3fa/0x830 block/blk-mq-sched.c:473
elevator_init_mq+0x1d8/0x2d0 block/elevator.c:605
add_disk_fwnode+0x10d/0xf80 block/genhd.c:413
sd_probe+0xba6/0x1100 drivers/scsi/sd.c:4024
really_probe+0x2b8/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459
__device_attach_async_helper+0x22d/0x300 drivers/base/dd.c:987
async_run_entry_fn+0xa8/0x420 kernel/async.c:129
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #3 (&q->q_usage_counter(io)#66){++++}-{0:0}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
bio_queue_enter block/blk.h:75 [inline]
blk_mq_submit_bio+0x1510/0x2490 block/blk-mq.c:3069
__submit_bio+0x2c2/0x560 block/blk-core.c:629
__submit_bio_noacct_mq block/blk-core.c:710 [inline]
submit_bio_noacct_nocheck+0x4d3/0xe30 block/blk-core.c:739
ext4_mpage_readpages+0x1cdc/0x1ea0 fs/ext4/readpage.c:389
read_pages+0x17e/0x840 mm/readahead.c:160
page_cache_ra_unbounded+0x797/0x8c0 mm/readahead.c:295
page_cache_sync_readahead include/linux/pagemap.h:1397 [inline]
filemap_get_pages+0x621/0x2540 mm/filemap.c:2546
filemap_read+0x46b/0xf50 mm/filemap.c:2646
__kernel_read+0x513/0x9d0 fs/read_write.c:527
prepare_binprm fs/exec.c:1677 [inline]
search_binary_handler fs/exec.c:1726 [inline]
exec_binprm fs/exec.c:1784 [inline]
bprm_execve+0xa2b/0x1770 fs/exec.c:1835
kernel_execve+0x931/0xa50 fs/exec.c:2002
try_to_run_init_process init/main.c:1394 [inline]
kernel_init+0xed/0x2b0 init/main.c:1522
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #2 (mapping.invalidate_lock){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:872 [inline]
filemap_fault+0x6e8/0x1950 mm/filemap.c:3332
__do_fault+0x135/0x460 mm/memory.c:4907
do_shared_fault mm/memory.c:5386 [inline]
do_fault mm/memory.c:5460 [inline]
do_pte_missing mm/memory.c:3979 [inline]
handle_pte_fault+0x1139/0x66b0 mm/memory.c:5801
__handle_mm_fault mm/memory.c:5944 [inline]
handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6112
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
-> #1 (&vma->vm_lock->lock){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
down_write+0x99/0x220 kernel/locking/rwsem.c:1577
vma_start_write include/linux/mm.h:769 [inline]
vma_link+0x28c/0x500 mm/vma.c:1687
insert_vm_struct+0x2f7/0x410 mm/mmap.c:1765
__bprm_mm_init fs/exec.c:289 [inline]
bprm_mm_init fs/exec.c:393 [inline]
alloc_bprm+0xa54/0xe60 fs/exec.c:1538
kernel_execve+0x99/0xa50 fs/exec.c:1967
try_to_run_init_process init/main.c:1394 [inline]
kernel_init+0xed/0x2b0 init/main.c:1522
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (&mm->mmap_lock){++++}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__might_fault+0xc6/0x120 mm/memory.c:6751
_inline_copy_from_user include/linux/uaccess.h:162 [inline]
_copy_from_user+0x2a/0xc0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:212 [inline]
__blk_trace_setup kernel/trace/blktrace.c:626 [inline]
blk_trace_setup+0xd2/0x1e0 kernel/trace/blktrace.c:648
sg_ioctl_common drivers/scsi/sg.c:1121 [inline]
sg_ioctl+0xa46/0x2e80 drivers/scsi/sg.c:1163
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&mm->mmap_lock --> &q->q_usage_counter(io)#66 --> &q->debugfs_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&q->debugfs_mutex);
lock(&q->q_usage_counter(io)#66);
lock(&q->debugfs_mutex);
rlock(&mm->mmap_lock);
*** DEADLOCK ***
1 lock held by syz.0.15/5979:
#0: ffff88802616e030 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0xb0/0x1e0 kernel/trace/blktrace.c:647
stack backtrace:
CPU: 1 UID: 0 PID: 5979 Comm: syz.0.15 Not tainted 6.12.0-rc5-next-20241031-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__might_fault+0xc6/0x120 mm/memory.c:6751
_inline_copy_from_user include/linux/uaccess.h:162 [inline]
_copy_from_user+0x2a/0xc0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:212 [inline]
__blk_trace_setup kernel/trace/blktrace.c:626 [inline]
blk_trace_setup+0xd2/0x1e0 kernel/trace/blktrace.c:648
sg_ioctl_common drivers/scsi/sg.c:1121 [inline]
sg_ioctl+0xa46/0x2e80 drivers/scsi/sg.c:1163
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd37077e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffaaeab888 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd370935f80 RCX: 00007fd37077e719
RDX: 0000000000000000 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 00007fd3707f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd370935f80 R14: 00007fd370935f80 R15: 0000000000000304