ci starts bisection 2023-10-25 14:38:32.481272104 +0000 UTC m=+102.301176974 bisecting fixing commit since 1c7873e3364570ec89343ff4877e0f27a7b21a61 building syzkaller on 668cb1fa42960ece96b7da8d9204e486ba6dcdf6 ensuring issue is reproducible on original commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ddf65181c973cb1cd1710c2be5c7e035df77ebc67f18d0cda505eaa5831c109f run #0: crashed: INFO: task hung in find_inode_fast run #1: crashed: INFO: task hung in find_inode_fast run #2: crashed: INFO: task hung in ext4_evict_ea_inode run #3: crashed: INFO: task hung in ext4_evict_ea_inode run #4: crashed: INFO: task hung in find_inode_fast run #5: crashed: INFO: task hung in ext4_evict_ea_inode run #6: crashed: INFO: task hung in ext4_evict_ea_inode run #7: crashed: INFO: task hung in find_inode_fast run #8: crashed: INFO: task hung in ext4_evict_ea_inode run #9: crashed: INFO: task hung in find_inode_fast run #10: crashed: INFO: task hung in find_inode_fast run #11: crashed: INFO: task hung in find_inode_fast run #12: crashed: INFO: task hung in find_inode_fast run #13: crashed: INFO: task hung in find_inode_fast run #14: crashed: INFO: task hung in find_inode_fast run #15: crashed: INFO: task hung in find_inode_fast run #16: crashed: INFO: task hung in find_inode_fast run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in find_inode_fast, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3c823e9dd3fe2c482454e7b6aa2666d33f7a2bffe22a62576df3225126b76960 run #0: crashed: INFO: task hung in ext4_evict_ea_inode run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK representative crash: INFO: task hung in ext4_evict_ea_inode, types: [HANG] kconfig minimization: base=3930 full=7644 leaves diff=1992 split chunks (needed=false): <1992> split chunk #0 of len 1992 into 5 parts testing without sub-chunk 1/5 testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 68cad3fee4118f62009c93f05609487d0e9c6c7ed4b22ba58d0d789c58e3b026 run #0: crashed: WARNING: locking bug in ext4_xattr_inode_update_ref run #1: crashed: INFO: task hung in find_inode_fast run #2: crashed: INFO: task hung in find_inode_fast run #3: crashed: INFO: task hung in find_inode_fast run #4: crashed: INFO: task hung in find_inode_fast run #5: crashed: INFO: task hung in ext4_evict_ea_inode run #6: crashed: INFO: task hung in find_inode_fast run #7: crashed: INFO: task hung in find_inode_fast run #8: crashed: INFO: task hung in ext4_evict_ea_inode run #9: crashed: INFO: task hung in ext4_evict_ea_inode run #10: crashed: INFO: task hung in find_inode_fast run #11: crashed: INFO: task hung in find_inode_fast run #12: crashed: INFO: task hung in find_inode_fast run #13: crashed: INFO: task hung in find_inode_fast run #14: crashed: INFO: task hung in find_inode_fast run #15: crashed: INFO: task hung in find_inode_fast run #16: crashed: INFO: task hung in ext4_evict_ea_inode run #17: crashed: INFO: task hung in ext4_evict_ea_inode run #18: crashed: INFO: task hung in find_inode_fast run #19: crashed: INFO: task hung in find_inode_fast representative crash: INFO: task hung in find_inode_fast, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 253623c2f4ee68ccae40a22c83b2b2d6fa4c20db47c856264858f588c8ece9ee run #0: crashed: INFO: task hung in ext4_evict_ea_inode run #1: crashed: INFO: task hung in find_inode_fast run #2: crashed: INFO: task hung in find_inode_fast run #3: crashed: INFO: task hung in find_inode_fast run #4: crashed: INFO: task hung in find_inode_fast run #5: crashed: INFO: task hung in find_inode_fast run #6: crashed: INFO: task hung in find_inode_fast run #7: crashed: INFO: task hung in find_inode_fast run #8: crashed: INFO: task hung in ext4_evict_ea_inode run #9: crashed: INFO: task hung in ext4_evict_ea_inode run #10: crashed: INFO: task hung in find_inode_fast run #11: crashed: INFO: task hung in ext4_evict_ea_inode run #12: crashed: INFO: task hung in find_inode_fast run #13: crashed: INFO: task hung in find_inode_fast run #14: crashed: INFO: task hung in find_inode_fast run #15: crashed: INFO: task hung in find_inode_fast run #16: crashed: INFO: task hung in ext4_evict_ea_inode run #17: crashed: INFO: task hung in find_inode_fast run #18: crashed: INFO: task hung in find_inode_fast run #19: crashed: INFO: task hung in ext4_evict_ea_inode representative crash: INFO: task hung in ext4_evict_ea_inode, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4dd36eea0f88a7e22746658086ca2b266b31e9f9441780b5082d55558f541836 run #0: crashed: INFO: task hung in find_inode_fast run #1: crashed: INFO: task hung in ext4_evict_ea_inode run #2: crashed: INFO: task hung in ext4_evict_ea_inode run #3: crashed: INFO: task hung in find_inode_fast run #4: crashed: INFO: task hung in find_inode_fast run #5: crashed: INFO: task hung in find_inode_fast run #6: crashed: INFO: task hung in find_inode_fast run #7: crashed: INFO: task hung in find_inode_fast run #8: crashed: INFO: task hung in ext4_evict_ea_inode run #9: crashed: INFO: task hung in find_inode_fast run #10: crashed: INFO: task hung in find_inode_fast run #11: crashed: INFO: task hung in find_inode_fast run #12: crashed: INFO: task hung in ext4_evict_ea_inode run #13: crashed: INFO: task hung in find_inode_fast run #14: crashed: INFO: task hung in find_inode_fast run #15: crashed: INFO: task hung in ext4_evict_ea_inode run #16: crashed: INFO: task hung in find_inode_fast run #17: crashed: INFO: task hung in ext4_evict_ea_inode run #18: crashed: INFO: task hung in ext4_evict_ea_inode run #19: OK representative crash: INFO: task hung in find_inode_fast, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b79e99ea6a786c6f3b05d0b66e2545688e350f48f56b2060f02727bf1fb39a33 run #0: crashed: INFO: task hung in find_inode_fast run #1: crashed: INFO: task hung in find_inode_fast run #2: crashed: INFO: task hung in find_inode_fast run #3: crashed: INFO: task hung in find_inode_fast run #4: crashed: INFO: task hung in find_inode_fast run #5: crashed: INFO: task hung in find_inode_fast run #6: crashed: INFO: task hung in find_inode_fast run #7: crashed: INFO: task hung in find_inode_fast run #8: crashed: INFO: task hung in find_inode_fast run #9: crashed: INFO: task hung in find_inode_fast run #10: crashed: INFO: task hung in find_inode_fast run #11: crashed: INFO: task hung in find_inode_fast run #12: crashed: INFO: task hung in find_inode_fast run #13: crashed: INFO: task hung in find_inode_fast run #14: crashed: INFO: task hung in find_inode_fast run #15: crashed: INFO: task hung in find_inode_fast run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in find_inode_fast, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 testing commit 1c7873e3364570ec89343ff4877e0f27a7b21a61 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bf80c174ae0879c917b8bedf8df9376a385b2f5f2677974aa8f74008683336e8 run #0: crashed: INFO: task hung in ext4_evict_ea_inode run #1: crashed: INFO: task hung in find_inode_fast run #2: crashed: INFO: task hung in find_inode_fast run #3: crashed: INFO: task hung in find_inode_fast run #4: crashed: INFO: task hung in ext4_evict_ea_inode run #5: crashed: INFO: task hung in ext4_evict_ea_inode run #6: crashed: INFO: task hung in find_inode_fast run #7: crashed: INFO: task hung in find_inode_fast run #8: crashed: INFO: task hung in find_inode_fast run #9: crashed: WARNING: locking bug in ext4_xattr_inode_update_ref run #10: crashed: INFO: task hung in ext4_evict_ea_inode run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: basic kernel testing failed: failed to copy binary to VM: timedout after 1m0s ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2656488979" "root@10.128.10.19:./syz-executor2656488979"] Executing: program /usr/bin/ssh host 10.128.10.19, user root, command sftp OpenSSH_9.2p1 Debian-2, OpenSSL 3.0.9 30 May 2023 debug1: Reading configuration data /dev/null debug1: Connecting to 10.128.10.19 [10.128.10.19] port 22. debug1: fd 3 clearing O_NONBLOCK debug1: Connection established. debug1: identity file /root/.ssh/id_rsa type -1 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: identity file /root/.ssh/id_ecdsa_sk type -1 debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1 debug1: identity file /root/.ssh/id_ed25519 type -1 debug1: identity file /root/.ssh/id_ed25519-cert type -1 debug1: identity file /root/.ssh/id_ed25519_sk type -1 debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1 debug1: identity file /root/.ssh/id_xmss type -1 debug1: identity file /root/.ssh/id_xmss-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_9.2p1 Debian-2 debug1: Remote protocol version 2.0, remote software version OpenSSH_9.1 debug1: compat_banner: match: OpenSSH_9.1 pat OpenSSH* compat 0x04000000 debug1: Authenticating to 10.128.10.19:22 as 'root' debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory debug1: SSH2_MSG_KEXINIT sent representative crash: INFO: task hung in ext4_evict_ea_inode, types: [HANG] the chunk can be dropped testing current HEAD 4f82870119a46b0d04d91ef4697ac4977a255a9d testing commit 4f82870119a46b0d04d91ef4697ac4977a255a9d gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 436a9dda38b680d5f0f347d29f31820a7e612d311c88380edb6e4930422f5958 run #0: crashed: INFO: task hung in find_inode_fast run #1: crashed: INFO: task hung in ext4_evict_ea_inode run #2: crashed: INFO: task hung in find_inode_fast run #3: crashed: INFO: task hung in find_inode_fast run #4: crashed: INFO: task hung in ext4_evict_ea_inode run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK representative crash: INFO: task hung in find_inode_fast, types: [HANG] crash still not fixed/happens on the oldest tested release reproducer is flaky (0.58 repro chance estimate) revisions tested: 8, total time: 2h56m34.455565632s (build: 1h9m50.507707486s, test: 1h28m40.758010713s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'mm-hotfixes-stable-2023-10-24-09-40' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm crash: INFO: task hung in find_inode_fast INFO: task syz-executor.5:4163 blocked for more than 143 seconds. Not tainted 6.6.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:26000 pid:4163 ppid:1410 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1660/0x23b0 kernel/sched/core.c:6695 schedule+0xc3/0x180 kernel/sched/core.c:6771 __wait_on_freeing_inode fs/inode.c:2272 [inline] find_inode_fast+0x2e8/0x3d0 fs/inode.c:936 iget_locked+0x9b/0x720 fs/inode.c:1301 __ext4_iget+0x2ab/0x3c00 fs/ext4/inode.c:4704 ext4_xattr_inode_cache_find fs/ext4/xattr.c:1542 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1577 [inline] ext4_xattr_set_entry+0x12ee/0x3d90 fs/ext4/xattr.c:1719 ext4_xattr_block_set+0xbeb/0x3350 fs/ext4/xattr.c:2039 ext4_xattr_set_handle+0xb0f/0x1270 fs/ext4/xattr.c:2456 ext4_xattr_set+0x218/0x370 fs/ext4/xattr.c:2558 __vfs_setxattr+0x334/0x380 fs/xattr.c:201 __vfs_setxattr_noperm+0x106/0x4c0 fs/xattr.c:235 vfs_setxattr+0x1d3/0x350 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] setxattr+0x182/0x1f0 fs/xattr.c:653 path_setxattr+0x17d/0x230 fs/xattr.c:672 __do_sys_setxattr fs/xattr.c:688 [inline] __se_sys_setxattr fs/xattr.c:684 [inline] __x64_sys_setxattr+0xb6/0xd0 fs/xattr.c:684 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7041469b29 RSP: 002b:00007f7038c0b0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f7041589050 RCX: 00007f7041469b29 RDX: 00000000200005c0 RSI: 0000000020000180 RDI: 00000000200000c0 RBP: 00007f70414b547a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f7041589050 R15: 00007ffef08e6028 INFO: task syz-executor.5:4169 blocked for more than 143 seconds. Not tainted 6.6.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:25800 pid:4169 ppid:1410 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x1660/0x23b0 kernel/sched/core.c:6695 schedule+0xc3/0x180 kernel/sched/core.c:6771 mb_cache_entry_wait_unused+0x16e/0x200 fs/mbcache.c:148 ext4_evict_ea_inode+0x169/0x2b0 fs/ext4/xattr.c:480 ext4_evict_inode+0x117/0xc40 fs/ext4/inode.c:180 evict+0x262/0x550 fs/inode.c:664 ext4_xattr_set_entry+0x2add/0x3d90 fs/ext4/xattr.c:1870 ext4_xattr_block_set+0x669/0x3350 fs/ext4/xattr.c:1970 ext4_xattr_set_handle+0xb0f/0x1270 fs/ext4/xattr.c:2456 ext4_xattr_set+0x218/0x370 fs/ext4/xattr.c:2558 __vfs_setxattr+0x334/0x380 fs/xattr.c:201 __vfs_setxattr_noperm+0x106/0x4c0 fs/xattr.c:235 vfs_setxattr+0x1d3/0x350 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] setxattr+0x182/0x1f0 fs/xattr.c:653 path_setxattr+0x17d/0x230 fs/xattr.c:672 __do_sys_setxattr fs/xattr.c:688 [inline] __se_sys_setxattr fs/xattr.c:684 [inline] __x64_sys_setxattr+0xb6/0xd0 fs/xattr.c:684 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7041469b29 RSP: 002b:00007f7038bea0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f7041589120 RCX: 00007f7041469b29 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 00000000200001c0 RBP: 00007f70414b547a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f7041589120 R15: 00007ffef08e6028 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8405fe40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #0: ffffffff8405fe40 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #0: ffffffff8405fe40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613 2 locks held by getty/769: #0: ffff8881023b60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5f3/0x1890 drivers/tty/n_tty.c:2206 3 locks held by syz-executor.1/1399: 1 lock held by syz-executor.0/1400: #0: ffffffff84064d38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #0: ffffffff84064d38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992 1 lock held by syz-executor.3/1405: 3 locks held by syz-executor.2/1416: 3 locks held by syz-executor.5/4163: #0: ffff8881225003e8 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3a/0x70 fs/namespace.c:403 #1: ffff888120698400 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888120698400 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_setxattr+0x192/0x350 fs/xattr.c:321 #2: ffff8881206980c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff8881206980c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x23b/0x1270 fs/ext4/xattr.c:2371 3 locks held by syz-executor.5/4169: #0: ffff8881225003e8 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3a/0x70 fs/namespace.c:403 #1: ffff8881206ab588 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff8881206ab588 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x192/0x350 fs/xattr.c:321 #2: ffff8881206ab250 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff8881206ab250 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x23b/0x1270 fs/ext4/xattr.c:2371 1 lock held by syz-executor.2/11475: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x167/0x220 lib/dump_stack.c:106 nmi_cpu_backtrace+0x34f/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x104/0x200 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xb16/0xb50 kernel/hung_task.c:379 kthread+0x27d/0x2f0 kernel/kthread.c:388 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11478 Comm: syz-executor.1 Not tainted 6.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0033:0x7f64946c5710 Code: 49 8b 47 10 48 39 f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 <49> 89 c1 49 29 f1 47 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b RSP: 002b:00007f649429b520 EFLAGS: 00000206 RAX: 000000000000fb97 RBX: 00007f649429b5c0 RCX: 0000000000000067 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f649429b660 RBP: 0000000000000102 R08: 00007f648be7c000 R09: 0000000000000000 R10: 0000000000000000 R11: 00007f649429b5d0 R12: 0000000000000001 R13: 00007f6494787340 R14: 0000000000000000 R15: 00007f649429b660 FS: 00007f649429c6c0 GS: 0000000000000000