ci starts bisection 2025-10-28 15:10:40.482677291 +0000 UTC m=+83683.273818536 bisecting fixing commit since d006330be3f782ff3fb7c3ed51e617e01f29a465 building syzkaller on abade7941e7b8a888e052cda1a92805ab785c77e ensuring issue is reproducible on original commit d006330be3f782ff3fb7c3ed51e617e01f29a465 testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e57c2c93e6667980c227b2cf4c03086dd29477aa7d898a41d1ece0ee813f2655 run #0: crashed: INFO: task hung in xfs_setfilesize run #1: crashed: INFO: task hung in xfs_setfilesize run #2: crashed: INFO: task hung in xfs_setfilesize run #3: crashed: INFO: task hung in xfs_setfilesize run #4: crashed: INFO: task hung in xfs_setfilesize run #5: crashed: INFO: task hung in xfs_setfilesize run #6: crashed: INFO: task hung in xfs_setfilesize run #7: crashed: INFO: task hung in process_measurement run #8: crashed: INFO: task hung in xfs_setfilesize run #9: crashed: INFO: task hung in xfs_setfilesize run #10: crashed: INFO: task hung in xfs_setfilesize run #11: crashed: INFO: task hung in xfs_setfilesize run #12: crashed: INFO: task hung in xfs_setfilesize run #13: crashed: INFO: task hung in xfs_setfilesize run #14: crashed: INFO: task hung in xfs_trans_alloc_inode run #15: crashed: INFO: task hung in xfs_setfilesize run #16: crashed: INFO: task hung in xfs_file_fsync run #17: crashed: INFO: task hung in xfs_setfilesize run #18: crashed: INFO: task hung in xfs_trans_alloc_inode run #19: OK representative crash: INFO: task hung in xfs_setfilesize, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: f9ddc720bfc21b002c4a1b8e68ec1df16cfff55a27a76035d1174a7a6539728b run #0: crashed: INFO: task hung in xfs_setfilesize run #1: crashed: INFO: task hung in xfs_trans_alloc_inode run #2: crashed: INFO: task hung in xfs_setfilesize run #3: crashed: INFO: task hung in xfs_setfilesize run #4: crashed: INFO: task hung in xfs_file_fsync run #5: crashed: INFO: task hung in xfs_setfilesize run #6: crashed: INFO: task hung in xfs_setfilesize run #7: crashed: INFO: task hung in process_measurement run #8: crashed: INFO: task hung in xfs_setfilesize run #9: OK representative crash: INFO: task hung in xfs_setfilesize, types: [HANG] the bug reproduces without the instrumentation disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed kconfig minimization: base=4116 full=8481 leaves diff=2204 split chunks (needed=false): <2204> split chunk #0 of len 2204 into 5 parts testing without sub-chunk 1/5 disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: b6d4a134654202818d470ec73b30a50f7243a5d0d2d0b4f29090c0136a3db2e6 run #0: crashed: INFO: task hung in xfs_setfilesize run #1: crashed: INFO: task hung in xfs_setfilesize run #2: crashed: INFO: task hung in xfs_setfilesize run #3: crashed: INFO: task hung in xfs_setfilesize run #4: crashed: INFO: task hung in xfs_setfilesize run #5: crashed: INFO: task hung in xfs_setfilesize run #6: crashed: INFO: task hung in xfs_setfilesize run #7: crashed: INFO: task hung in xfs_setfilesize run #8: OK run #9: OK representative crash: INFO: task hung in xfs_setfilesize, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 82664e3a50f5eb0aa59abab051b384bd3ccba2a3a4450b6e5c7d5b539abd06bd run #0: crashed: INFO: task hung in xfs_setfilesize run #1: crashed: INFO: task hung in xfs_setfilesize run #2: crashed: INFO: task hung in xfs_setfilesize run #3: crashed: INFO: task hung in xfs_setfilesize run #4: crashed: INFO: task hung in xfs_file_fsync run #5: crashed: INFO: task hung in xfs_setfilesize run #6: crashed: INFO: task hung in xfs_setfilesize run #7: crashed: INFO: task hung in xfs_setfilesize run #8: crashed: INFO: task hung in xfs_setfilesize run #9: crashed: INFO: task hung in xfs_trans_alloc_inode representative crash: INFO: task hung in xfs_setfilesize, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3a5ec6b410fafac7fd0e7b667c67dd450f42369bd9f38023339edae47829beb3 all runs: crashed: INFO: task hung in xfs_setfilesize representative crash: INFO: task hung in xfs_setfilesize, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: e34f75098bbcfccce4974245578ddd7875d376abc4d5dee6e975d6981856b929 run #0: crashed: INFO: task hung in xfs_setfilesize run #1: crashed: INFO: task hung in xfs_setfilesize run #2: crashed: INFO: task hung in xfs_setfilesize run #3: crashed: INFO: task hung in xfs_setfilesize run #4: crashed: INFO: task hung in xfs_setfilesize run #5: crashed: INFO: task hung in xfs_trans_alloc_inode run #6: crashed: INFO: task hung in xfs_setfilesize run #7: crashed: INFO: task hung in xfs_setfilesize run #8: crashed: INFO: task hung in xfs_file_fsync run #9: OK representative crash: INFO: task hung in xfs_setfilesize, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed testing commit d006330be3f782ff3fb7c3ed51e617e01f29a465 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: cab03293be6033d7380eecb37e5fe4e9263b007b142f1427d8df02e1344da8d3 all runs: OK false negative chance: 0.000 minimized to 440 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA COMMON_CLK CONTIG_ALLOC DVB_CORE EXTCON 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VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PROC WIREGUARD WIRELESS WLAN WLAN_VENDOR_ADMTEK WLAN_VENDOR_SILABS X86_64_SMP X86_SGX X86_SGX_KVM X86_USER_SHADOW_STACK XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XILLYBUS_CLASS XILLYUSB XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZEROPLUS_FF ZLIB_DEFLATE ZONEFS_FS ZPOOL ZRAM ZRAM_BACKEND_FORCE_LZO ZRAM_BACKEND_LZO ZRAM_DEF_COMP_LZO ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_842 ZSWAP_DEFAULT_ON ZSWAP_SHRINKER_DEFAULT_ON ZSWAP_ZPOOL_DEFAULT_ZSMALLOC] disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD fd57572253bc356330dbe5b233c2e1d8426c66fd testing commit fd57572253bc356330dbe5b233c2e1d8426c66fd gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: ac591a2ba29c90310dced390804433b21269591bd5bf5b42c898d3d4ec5a81f9 run #0: crashed: INFO: task hung in xfs_trans_alloc_inode run #1: crashed: INFO: task hung in xfs_setfilesize run #2: crashed: INFO: task hung in xfs_setfilesize run #3: crashed: INFO: task hung in xfs_writeback_range run #4: crashed: INFO: task hung in xfs_trans_alloc_inode run #5: crashed: INFO: task hung in xfs_setfilesize run #6: crashed: INFO: task hung in xfs_setfilesize run #7: crashed: INFO: task hung in xfs_writeback_range run #8: crashed: INFO: task hung in xfs_setfilesize run #9: OK representative crash: INFO: task hung in xfs_trans_alloc_inode, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 2h52m11.487045014s (build: 56m52.242550797s, test: 1h43m44.333763696s) crash still not fixed or there were kernel test errors commit msg: Merge tag 'sched_ext-for-6.18-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext crash: INFO: task hung in xfs_trans_alloc_inode INFO: task kworker/0:3:3517 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:13336 pid:3517 tgid:3517 ppid:2 task_flags:0x4248060 flags:0x00080000 Workqueue: xfs-conv/loop7 xfs_end_io Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x74f/0xc50 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xac/0x140 kernel/sched/core.c:7026 schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:7083 rwsem_down_write_slowpath+0x2e2/0x6f0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write_nested+0x65/0x90 kernel/locking/rwsem.c:1707 xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 xfs_iomap_write_unwritten+0x12d/0x330 fs/xfs/xfs_iomap.c:661 xfs_end_ioend+0xe1/0x1c0 fs/xfs/xfs_aops.c:159 xfs_end_io+0xab/0xf0 fs/xfs/xfs_aops.c:205 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0x2e7/0x5e0 kernel/workqueue.c:3346 worker_thread+0x20a/0x2f0 kernel/workqueue.c:3427 kthread+0x203/0x230 kernel/kthread.c:463 ret_from_fork+0x126/0x200 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz.7.91:5989 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.7.91 state:D stack:11336 pid:5989 tgid:5988 ppid:3837 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x74f/0xc50 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xac/0x140 kernel/sched/core.c:7026 io_schedule+0x3f/0x60 kernel/sched/core.c:7871 folio_wait_bit_common+0x1d9/0x390 mm/filemap.c:1330 folio_wait_writeback+0x2d/0xb0 mm/page-writeback.c:3095 __filemap_fdatawait_range mm/filemap.c:542 [inline] file_write_and_wait_range+0x1a5/0x1d0 mm/filemap.c:801 xfs_file_fsync+0x8c/0x260 fs/xfs/xfs_file.c:135 generic_write_sync include/linux/fs.h:3046 [inline] xfs_file_buffered_write+0x271/0x2b0 fs/xfs/xfs_file.c:1012 do_iter_readv_writev+0x19b/0x1e0 fs/read_write.c:-1 vfs_writev+0x237/0x4d0 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2+0x65/0x100 fs/read_write.c:1202 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4047d1e929 RSP: 002b:00007f404778f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f4047f45fa0 RCX: 00007f4047d1e929 RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000004 RBP: 00007f4047da0b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4047f45fa0 R15: 00007ffc3cdd56d8 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: #0: ffffffff8378fcf8 (rcu_state.exp_mutex){....}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #0: ffffffff8378fcf8 (rcu_state.exp_mutex){....}-{3:3}, at: synchronize_rcu_expedited+0x2df/0x620 kernel/rcu/tree_exp.h:957 4 locks held by kworker/0:1/11: #0: ffff88812713b548 ((wq_completion)xfs-conv/loop1){....}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline] #0: ffff88812713b548 ((wq_completion)xfs-conv/loop1){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3346 #1: ffffc90000063e38 ((work_completion)(&ip->i_ioend_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline] #1: ffffc90000063e38 ((work_completion)(&ip->i_ioend_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3346 #2: ffff888130a915e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff8881269f8118 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_setfilesize+0x5b/0x170 fs/xfs/xfs_aops.c:65 1 lock held by khungtaskd/31: #0: ffffffff8378ed30 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8378ed30 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8378ed30 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775 2 locks held by getty/2947: #0: ffff88810729a8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243 #1: ffffc900091fb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0 drivers/tty/n_tty.c:2222 4 locks held by kworker/0:3/3517: #0: ffff888125bc1f48 ((wq_completion)xfs-conv/loop7#14){....}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline] #0: ffff888125bc1f48 ((wq_completion)xfs-conv/loop7#14){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3346 #1: ffffc9000781be38 ((work_completion)(&ip->i_ioend_work)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline] #1: ffffc9000781be38 ((work_completion)(&ip->i_ioend_work)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3346 #2: ffff88810f6a25e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff888118deab18 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 1 lock held by syz.7.91/5989: #0: ffff88810f6a23f8 (sb_writers#12){....}-{0:0}, at: do_pwritev fs/read_write.c:1153 [inline] #0: ffff88810f6a23f8 (sb_writers#12){....}-{0:0}, at: __do_sys_pwritev2 fs/read_write.c:1211 [inline] #0: ffff88810f6a23f8 (sb_writers#12){....}-{0:0}, at: __se_sys_pwritev2+0x65/0x100 fs/read_write.c:1202 4 locks held by syz.7.91/6031: #0: ffff88810f6a23f8 (sb_writers#12){....}-{0:0}, at: filename_setxattr+0x8c/0x1f0 fs/xattr.c:663 #1: ffff888118dead30 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff888118dead30 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: vfs_setxattr+0xbb/0x170 fs/xattr.c:320 #2: ffff88810f6a25e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff888118deab18 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 4 locks held by syz.6.165/6971: 4 locks held by syz.2.215/7560: #0: ffff88812e08b3f8 (sb_writers#12){....}-{0:0}, at: filename_setxattr+0x8c/0x1f0 fs/xattr.c:663 #1: ffff888118ed1830 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff888118ed1830 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: vfs_setxattr+0xbb/0x170 fs/xattr.c:320 #2: ffff88812e08b5e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff888118ed1618 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 4 locks held by syz.9.274/8530: #0: ffff88812e0c23f8 (sb_writers#12){....}-{0:0}, at: filename_setxattr+0x8c/0x1f0 fs/xattr.c:663 #1: ffff888118ed5030 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff888118ed5030 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: vfs_setxattr+0xbb/0x170 fs/xattr.c:320 #2: ffff88812e0c25e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff888118ed4e18 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 4 locks held by syz.5.281/8679: 4 locks held by syz.8.339/9656: #0: ffff888130a903f8 (sb_writers#12){....}-{0:0}, at: filename_setxattr+0x8c/0x1f0 fs/xattr.c:663 #1: ffff888118debb30 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff888118debb30 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: vfs_setxattr+0xbb/0x170 fs/xattr.c:320 #2: ffff888130a905e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff888118deb918 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 1 lock held by syz.1.575/11338: #0: ffff888130a913f8 (sb_writers#12){....}-{0:0}, at: do_pwritev fs/read_write.c:1153 [inline] #0: ffff888130a913f8 (sb_writers#12){....}-{0:0}, at: __do_sys_pwritev2 fs/read_write.c:1211 [inline] #0: ffff888130a913f8 (sb_writers#12){....}-{0:0}, at: __se_sys_pwritev2+0x65/0x100 fs/read_write.c:1202 4 locks held by syz.1.575/11371: #0: ffff888130a913f8 (sb_writers#12){....}-{0:0}, at: filename_setxattr+0x8c/0x1f0 fs/xattr.c:663 #1: ffff8881269f8330 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff8881269f8330 (&sb->s_type->i_mutex_key#16){....}-{3:3}, at: vfs_setxattr+0xbb/0x170 fs/xattr.c:320 #2: ffff888130a915e8 (sb_internal#2){....}-{0:0}, at: xfs_trans_alloc+0x47/0x200 fs/xfs/xfs_trans.c:256 #3: ffff8881269f8118 (&xfs_nondir_ilock_class){....}-{3:3}, at: xfs_trans_alloc_inode+0xa3/0x220 fs/xfs/xfs_trans.c:1082 2 locks held by syz.7.631/11587: 2 locks held by syz.0.626/11589: 3 locks held by syz.4.628/11591: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x109/0x170 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0x573/0x5a0 kernel/hung_task.c:495 kthread+0x203/0x230 kernel/kthread.c:463 ret_from_fork+0x126/0x200 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 11589 Comm: syz.0.626 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline] RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline] RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:212 Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 e9 2b 5a db ff cc f3 0f 1e fa 89 f6 31 d2 e9 d2 b4 89 00 66 RSP: 0018:ffffc90000003f60 EFLAGS: 00000046 RAX: 000000000006f650 RBX: ffff888237c17900 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 000000000006f650 RDI: 0000000000000838 RBP: 0000000000000000 R08: 0000000000080000 R09: 0000000000000053 R10: 0000000000000000 R11: ffffffff81347230 R12: 0000000000000082 R13: ffff888237c1b9e0 R14: 00000038ab2cab80 R15: 0000000000000003 FS: 00007f409f0ef6c0(0000) GS:ffff8882b36ca000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcc7ea4f000 CR3: 000000013489e000 CR4: 0000000000350ef0 Call Trace: apic_write arch/x86/include/asm/apic.h:409 [inline] lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:416 clockevents_program_event+0x78/0x1a0 kernel/time/clockevents.c:334 hrtimer_interrupt+0x12c/0x230 kernel/time/hrtimer.c:1916 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x84/0x200 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2034 [inline] RIP: 0010:vprintk_emit+0x1f4/0x3d0 kernel/printk/printk.c:2422 Code: 24 08 00 00 00 00 9c 8f 44 24 08 f7 44 24 08 00 02 00 00 0f 85 cf 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 c7 a8 d3 78 83 <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 33 RSP: 0018:ffffc90000e63a40 EFLAGS: 00000206 RAX: ff31ca1c1b739d00 RBX: 000000000000002f RCX: ff31ca1c1b739d00 RDX: 77acea95f1c06dcc RSI: ffffffff8333c1a2 RDI: ffffffff8378d3a8 RBP: 0000000000000000 R08: 0000000000080000 R09: 000000000000000e R10: 0000000000000000 R11: 00000001000026cb R12: 0000000000000000 R13: 00000000ffffffff R14: ffffffff8140809c R15: 0000000000000246 _printk+0x57/0x80 kernel/printk/printk.c:2448 set_capacity_and_notify+0xf2/0x130 block/genhd.c:93 loop_set_size+0x10/0x40 drivers/block/loop.c:220 loop_configure+0x2e9/0x430 drivers/block/loop.c:1081 lo_ioctl+0x57d/0xa50 drivers/block/loop.c:1536 blkdev_ioctl+0x24c/0x2a0 block/ioctl.c:705 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0x6c/0xc0 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8f/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f409f67e52b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007f409f0eedc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f409f67e52b RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000985e R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007f409f0eeef0 R14: 00007f409f0eeeb0 R15: 00007f4096ccf000