======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G L
------------------------------------------------------
syz.0.134/6523 is trying to acquire lock:
ffff88805b9a94e8 (&resv_map->rw_sema){++++}-{4:4}, at: hugetlb_vma_lock_read mm/hugetlb.c:301 [inline]
ffff88805b9a94e8 (&resv_map->rw_sema){++++}-{4:4}, at: hugetlb_vma_lock_read+0xff/0x130 mm/hugetlb.c:292
but task is already holding lock:
ffff88801f6a2578 (&hugetlb_fault_mutex_table[i]){+.+.}-{4:4}, at: hugetlb_fault+0x2fa/0x1730 mm/hugetlb.c:5998
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #8 (&hugetlb_fault_mutex_table[i]){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:614 [inline]
__mutex_lock+0x1aa/0x1ca0 kernel/locking/mutex.c:776
hugetlb_fault+0x2fa/0x1730 mm/hugetlb.c:5998
handle_mm_fault+0x95d/0xad0 mm/memory.c:6578
do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:68
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
copy_from_user_iter lib/iov_iter.c:67 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:302 [inline]
iterate_and_advance include/linux/iov_iter.h:330 [inline]
__copy_from_iter lib/iov_iter.c:261 [inline]
_copy_from_iter+0x355/0x16c0 lib/iov_iter.c:272
copy_from_iter include/linux/uio.h:228 [inline]
copy_from_iter_full include/linux/uio.h:245 [inline]
do_copy_data_nocache net/mptcp/protocol.c:1817 [inline]
mptcp_sendmsg+0x1046/0x1ee0 net/mptcp/protocol.c:1940
inet_sendmsg+0x11c/0x140 net/ipv4/af_inet.c:859
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg net/socket.c:742 [inline]
sock_write_iter+0x509/0x610 net/socket.c:1195
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x1f8/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #7 (sk_lock-AF_INET){+.+.}-{0:0}:
lock_sock_nested+0x41/0xf0 net/core/sock.c:3780
lock_sock include/net/sock.h:1700 [inline]
inet_shutdown+0x67/0x440 net/ipv4/af_inet.c:913
nbd_mark_nsock_dead+0xae/0x5d0 drivers/block/nbd.c:318
recv_work+0x66b/0xa70 drivers/block/nbd.c:1021
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
-> #6 (&nsock->tx_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:614 [inline]
__mutex_lock+0x1aa/0x1ca0 kernel/locking/mutex.c:776
nbd_handle_cmd drivers/block/nbd.c:1143 [inline]
nbd_queue_rq+0x423/0x12d0 drivers/block/nbd.c:1207
blk_mq_dispatch_rq_list+0x416/0x1e20 block/blk-mq.c:2138
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
__blk_mq_sched_dispatch_requests+0xcbd/0x15f0 block/blk-mq-sched.c:307
blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:329
blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2376
blk_mq_dispatch_list+0x514/0x1300 block/blk-mq.c:2939
blk_mq_flush_plug_list block/blk-mq.c:2987 [inline]
blk_mq_flush_plug_list+0x130/0x600 block/blk-mq.c:2959
__blk_flush_plug+0x2c4/0x4b0 block/blk-core.c:1225
blk_finish_plug block/blk-core.c:1252 [inline]
blk_finish_plug block/blk-core.c:1249 [inline]
__submit_bio+0x542/0x690 block/blk-core.c:651
__submit_bio_noacct_mq block/blk-core.c:724 [inline]
submit_bio_noacct_nocheck+0x53d/0xbe0 block/blk-core.c:755
submit_bio_noacct+0x5bd/0x1f40 block/blk-core.c:879
submit_bh fs/buffer.c:2829 [inline]
block_read_full_folio+0x4db/0x850 fs/buffer.c:2461
filemap_read_folio+0xc8/0x2a0 mm/filemap.c:2496
do_read_cache_folio+0x266/0x5c0 mm/filemap.c:4096
read_mapping_folio include/linux/pagemap.h:1017 [inline]
read_part_sector+0xd4/0x370 block/partitions/core.c:722
adfspart_check_ICS+0x93/0x940 block/partitions/acorn.c:360
check_partition block/partitions/core.c:141 [inline]
blk_add_partitions block/partitions/core.c:589 [inline]
bdev_disk_changed+0x723/0x1520 block/partitions/core.c:693
blkdev_get_whole+0x187/0x290 block/bdev.c:765
bdev_open+0x2c7/0xe40 block/bdev.c:974
blkdev_open+0x34e/0x4f0 block/fops.c:698
do_dentry_open+0x748/0x1590 fs/open.c:962
vfs_open+0x82/0x3f0 fs/open.c:1094
do_open fs/namei.c:4628 [inline]
path_openat+0x2078/0x3140 fs/namei.c:4787
do_filp_open+0x20b/0x470 fs/namei.c:4814
do_sys_openat2+0x121/0x290 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_openat fs/open.c:1452 [inline]
__se_sys_openat fs/open.c:1447 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1447
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #5 (&cmd->lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:614 [inline]
__mutex_lock+0x1aa/0x1ca0 kernel/locking/mutex.c:776
nbd_queue_rq+0xbd/0x12d0 drivers/block/nbd.c:1199
blk_mq_dispatch_rq_list+0x416/0x1e20 block/blk-mq.c:2138
__blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
__blk_mq_sched_dispatch_requests+0xcbd/0x15f0 block/blk-mq-sched.c:307
blk_mq_sched_dispatch_requests+0xd8/0x1b0 block/blk-mq-sched.c:329
blk_mq_run_hw_queue+0x239/0x670 block/blk-mq.c:2376
blk_mq_dispatch_list+0x514/0x1300 block/blk-mq.c:2939
blk_mq_flush_plug_list block/blk-mq.c:2987 [inline]
blk_mq_flush_plug_list+0x130/0x600 block/blk-mq.c:2959
__blk_flush_plug+0x2c4/0x4b0 block/blk-core.c:1225
blk_finish_plug block/blk-core.c:1252 [inline]
blk_finish_plug block/blk-core.c:1249 [inline]
__submit_bio+0x542/0x690 block/blk-core.c:651
__submit_bio_noacct_mq block/blk-core.c:724 [inline]
submit_bio_noacct_nocheck+0x53d/0xbe0 block/blk-core.c:755
submit_bio_noacct+0x5bd/0x1f40 block/blk-core.c:879
submit_bh fs/buffer.c:2829 [inline]
block_read_full_folio+0x4db/0x850 fs/buffer.c:2461
filemap_read_folio+0xc8/0x2a0 mm/filemap.c:2496
do_read_cache_folio+0x266/0x5c0 mm/filemap.c:4096
read_mapping_folio include/linux/pagemap.h:1017 [inline]
read_part_sector+0xd4/0x370 block/partitions/core.c:722
adfspart_check_ICS+0x93/0x940 block/partitions/acorn.c:360
check_partition block/partitions/core.c:141 [inline]
blk_add_partitions block/partitions/core.c:589 [inline]
bdev_disk_changed+0x723/0x1520 block/partitions/core.c:693
blkdev_get_whole+0x187/0x290 block/bdev.c:765
bdev_open+0x2c7/0xe40 block/bdev.c:974
blkdev_open+0x34e/0x4f0 block/fops.c:698
do_dentry_open+0x748/0x1590 fs/open.c:962
vfs_open+0x82/0x3f0 fs/open.c:1094
do_open fs/namei.c:4628 [inline]
path_openat+0x2078/0x3140 fs/namei.c:4787
do_filp_open+0x20b/0x470 fs/namei.c:4814
do_sys_openat2+0x121/0x290 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_openat fs/open.c:1452 [inline]
__se_sys_openat fs/open.c:1447 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1447
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #4 (set->srcu){.+.+}-{0:0}:
srcu_lock_sync include/linux/srcu.h:197 [inline]
__synchronize_srcu+0xa2/0x250 kernel/rcu/srcutree.c:1503
blk_mq_wait_quiesce_done block/blk-mq.c:284 [inline]
blk_mq_wait_quiesce_done block/blk-mq.c:281 [inline]
blk_mq_quiesce_queue block/blk-mq.c:304 [inline]
blk_mq_quiesce_queue+0x149/0x1b0 block/blk-mq.c:299
elevator_switch+0x17d/0x7f0 block/elevator.c:576
elevator_change+0x38b/0x570 block/elevator.c:684
elevator_set_default+0x2d2/0x390 block/elevator.c:757
blk_register_queue+0x384/0x4e0 block/blk-sysfs.c:932
__add_disk+0x74a/0xf00 block/genhd.c:528
add_disk_fwnode+0x13f/0x5d0 block/genhd.c:597
add_disk include/linux/blkdev.h:785 [inline]
nbd_dev_add+0x783/0xbb0 drivers/block/nbd.c:1984
nbd_init+0x181/0x320 drivers/block/nbd.c:2692
do_one_initcall+0x123/0x680 init/main.c:1378
do_initcall_level init/main.c:1440 [inline]
do_initcalls init/main.c:1456 [inline]
do_basic_setup init/main.c:1475 [inline]
kernel_init_freeable+0x5c8/0x920 init/main.c:1688
kernel_init+0x1c/0x2b0 init/main.c:1578
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
-> #3 (&q->elevator_lock){+.+.}-{4:4}:
__mutex_lock_common kernel/locking/mutex.c:614 [inline]
__mutex_lock+0x1aa/0x1ca0 kernel/locking/mutex.c:776
elevator_change+0x1ed/0x570 block/elevator.c:682
elv_iosched_store+0x3e8/0x4a0 block/elevator.c:815
queue_attr_store+0x26b/0x310 block/blk-sysfs.c:859
sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352
iter_file_splice_write+0xa24/0x12b0 fs/splice.c:738
do_splice_from fs/splice.c:938 [inline]
direct_splice_actor+0x192/0x6c0 fs/splice.c:1161
splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105
do_splice_direct_actor fs/splice.c:1204 [inline]
do_splice_direct+0x174/0x240 fs/splice.c:1230
do_sendfile+0xb06/0xe50 fs/read_write.c:1370
__do_sys_sendfile64 fs/read_write.c:1431 [inline]
__se_sys_sendfile64 fs/read_write.c:1417 [inline]
__x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (&q->q_usage_counter(io)#66){++++}-{0:0}:
blk_alloc_queue+0x610/0x750 block/blk-core.c:461
blk_mq_alloc_queue+0x172/0x280 block/blk-mq.c:4415
__blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4462
null_add_dev+0xf2e/0x1eb0 drivers/block/null_blk/main.c:1999
null_create_dev drivers/block/null_blk/main.c:2097 [inline]
null_init+0x2c9/0x610 drivers/block/null_blk/main.c:2169
do_one_initcall+0x123/0x680 init/main.c:1378
do_initcall_level init/main.c:1440 [inline]
do_initcalls init/main.c:1456 [inline]
do_basic_setup init/main.c:1475 [inline]
kernel_init_freeable+0x5c8/0x920 init/main.c:1688
kernel_init+0x1c/0x2b0 init/main.c:1578
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
-> #1 (fs_reclaim){+.+.}-{0:0}:
__fs_reclaim_acquire mm/page_alloc.c:4301 [inline]
fs_reclaim_acquire+0x102/0x150 mm/page_alloc.c:4315
might_alloc include/linux/sched/mm.h:317 [inline]
slab_pre_alloc_hook mm/slub.c:4904 [inline]
slab_alloc_node mm/slub.c:5239 [inline]
kmem_cache_alloc_noprof+0x5b/0x770 mm/slub.c:5270
anon_vma_chain_alloc mm/rmap.c:141 [inline]
__anon_vma_prepare+0xae/0x5e0 mm/rmap.c:194
__vmf_anon_prepare+0x11c/0x240 mm/memory.c:3673
hugetlb_no_page+0x10ae/0x2140 mm/hugetlb.c:5782
hugetlb_fault+0x5ed/0x1730 mm/hugetlb.c:6035
handle_mm_fault+0x95d/0xad0 mm/memory.c:6578
do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:68
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
_inline_copy_from_user include/linux/uaccess.h:185 [inline]
_copy_from_user+0x98/0xd0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:223 [inline]
do_pages_stat+0x240/0x7b0 mm/migrate.c:2509
kernel_move_pages+0xfc8/0x12f0 mm/migrate.c:2595
__do_sys_move_pages mm/migrate.c:2606 [inline]
__se_sys_move_pages mm/migrate.c:2601 [inline]
__x64_sys_move_pages+0xe0/0x1c0 mm/migrate.c:2601
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&resv_map->rw_sema){++++}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
down_read+0x9b/0x460 kernel/locking/rwsem.c:1537
hugetlb_vma_lock_read mm/hugetlb.c:301 [inline]
hugetlb_vma_lock_read+0xff/0x130 mm/hugetlb.c:292
hugetlb_fault+0x302/0x1730 mm/hugetlb.c:6005
handle_mm_fault+0x95d/0xad0 mm/memory.c:6578
do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
rep_movs_alternative+0x30/0x90 arch/x86/lib/copy_user_64.S:53
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
_inline_copy_from_user include/linux/uaccess.h:185 [inline]
_copy_from_user+0x98/0xd0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:223 [inline]
sctp_getsockopt_local_addrs net/sctp/socket.c:6302 [inline]
sctp_getsockopt+0x132c/0x7050 net/sctp/socket.c:8169
do_sock_getsockopt+0x324/0x410 net/socket.c:2383
__sys_getsockopt+0x123/0x1b0 net/socket.c:2412
__do_sys_getsockopt net/socket.c:2419 [inline]
__se_sys_getsockopt net/socket.c:2416 [inline]
__x64_sys_getsockopt+0xbd/0x160 net/socket.c:2416
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&resv_map->rw_sema --> sk_lock-AF_INET --> &hugetlb_fault_mutex_table[i]
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&hugetlb_fault_mutex_table[i]);
lock(sk_lock-AF_INET);
lock(&hugetlb_fault_mutex_table[i]);
rlock(&resv_map->rw_sema);
*** DEADLOCK ***
3 locks held by syz.0.134/6523:
#0: ffff888029b28260 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1700 [inline]
#0: ffff888029b28260 (sk_lock-AF_INET){+.+.}-{0:0}, at: sctp_getsockopt+0x2d6/0x7050 net/sctp/socket.c:8131
#1: ffff88807c681bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:410 [inline]
#1: ffff88807c681bc0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:390 [inline]
#1: ffff88807c681bc0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x35/0x6e0 mm/mmap_lock.c:450
#2: ffff88801f6a2578 (&hugetlb_fault_mutex_table[i]){+.+.}-{4:4}, at: hugetlb_fault+0x2fa/0x1730 mm/hugetlb.c:5998
stack backtrace:
CPU: 0 UID: 0 PID: 6523 Comm: syz.0.134 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x340 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
down_read+0x9b/0x460 kernel/locking/rwsem.c:1537
hugetlb_vma_lock_read mm/hugetlb.c:301 [inline]
hugetlb_vma_lock_read+0xff/0x130 mm/hugetlb.c:292
hugetlb_fault+0x302/0x1730 mm/hugetlb.c:6005
handle_mm_fault+0x95d/0xad0 mm/memory.c:6578
do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0010:rep_movs_alternative+0x30/0x90 arch/x86/lib/copy_user_64.S:60
Code: 83 f9 08 73 25 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 0d 81 04 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <48> 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08
RSP: 0018:ffffc90018687a60 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000008
RDX: fffff520030d0f94 RSI: 0000000000000000 RDI: ffffc90018687c98
RBP: 0000000000000008 R08: 0000000000000001 R09: fffff520030d0f93
R10: ffffc90018687c9f R11: ffff888030ff0b30 R12: 0000000000000000
R13: ffffc90018687c98 R14: 0000000000000000 R15: 1ffff920030d0f5f
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline]
_inline_copy_from_user include/linux/uaccess.h:185 [inline]
_copy_from_user+0x98/0xd0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:223 [inline]
sctp_getsockopt_local_addrs net/sctp/socket.c:6302 [inline]
sctp_getsockopt+0x132c/0x7050 net/sctp/socket.c:8169
do_sock_getsockopt+0x324/0x410 net/socket.c:2383
__sys_getsockopt+0x123/0x1b0 net/socket.c:2412
__do_sys_getsockopt net/socket.c:2419 [inline]
__se_sys_getsockopt net/socket.c:2416 [inline]
__x64_sys_getsockopt+0xbd/0x160 net/socket.c:2416
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f809a98f7c9
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:00007f809b7f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007f809abe5fa0 RCX: 00007f809a98f7c9
RDX: 000000000000006d RSI: 0000000000000084 RDI: 0000000000000004
RBP: 00007f809aa13f91 R08: 0000200000000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f809abe6038 R14: 00007f809abe5fa0 R15: 00007ffd0112e738
</TASK>
netlink: 25 bytes leftover after parsing attributes in process `syz.0.134'.
netlink: 198 bytes leftover after parsing attributes in process `syz.0.134'.
----------------
Code disassembly (best guess):
0: 83 f9 08 cmp $0x8,%ecx
3: 73 25 jae 0x2a
5: 85 c9 test %ecx,%ecx
7: 74 0f je 0x18
9: 8a 06 mov (%rsi),%al
b: 88 07 mov %al,(%rdi)
d: 48 ff c7 inc %rdi
10: 48 ff c6 inc %rsi
13: 48 ff c9 dec %rcx
16: 75 f1 jne 0x9
18: e9 0d 81 04 00 jmp 0x4812a
1d: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
24: 00 00 00 00
28: 66 90 xchg %ax,%ax
* 2a: 48 8b 06 mov (%rsi),%rax <-- trapping instruction
2d: 48 89 07 mov %rax,(%rdi)
30: 48 83 c6 08 add $0x8,%rsi
34: 48 83 c7 08 add $0x8,%rdi
38: 83 e9 08 sub $0x8,%ecx
3b: 74 db je 0x18
3d: 83 f9 08 cmp $0x8,%ecx