Warning: Permanently added '[localhost]:14470' (ED25519) to the list of known hosts. syzkaller login: [ 86.377743][ T9] cfg80211: failed to load regulatory.db executing program [ 86.848161][ T5101] loop0: detected capacity change from 0 to 32768 [ 86.888889][ T5101] XFS (loop0): Mounting V5 Filesystem 9f91832a-3b79-45c3-9d6d-ed0bc7357fe4 [ 86.939056][ T5101] XFS (loop0): Ending clean mount [ 86.945158][ T5101] XFS (loop0): Quotacheck needed: Please wait. [ 86.982374][ T5101] XFS (loop0): Quotacheck: Done. executing program [ 87.057262][ T80] [ 87.058337][ T80] ====================================================== [ 87.061211][ T80] WARNING: possible circular locking dependency detected [ 87.063809][ T80] 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 Not tainted [ 87.066739][ T80] ------------------------------------------------------ [ 87.069246][ T80] kswapd0/80 is trying to acquire lock: [ 87.071214][ T80] ffff88803b61af98 (&xfs_nondir_ilock_class#3){++++}-{3:3}, at: xfs_icwalk_ag+0x120e/0x1ad0 [ 87.074882][ T80] [ 87.074882][ T80] but task is already holding lock: [ 87.077523][ T80] ffffffff8ea2fce0 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0xbb4/0x35a0 [ 87.080371][ T80] [ 87.080371][ T80] which lock already depends on the new lock. [ 87.080371][ T80] [ 87.084022][ T80] [ 87.084022][ T80] the existing dependency chain (in reverse order) is: [ 87.088191][ T80] [ 87.088191][ T80] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 87.091085][ T80] lock_acquire+0x1ed/0x550 [ 87.093102][ T80] fs_reclaim_acquire+0x88/0x140 [ 87.095257][ T80] __kmalloc_noprof+0xa9/0x400 [ 87.097336][ T80] xfs_attr_shortform_list+0x753/0x1900 [ 87.099730][ T80] xfs_attr_list+0x1d0/0x270 [ 87.101826][ T80] xfs_vn_listxattr+0x1d2/0x2c0 [ 87.103875][ T80] listxattr+0x107/0x290 [ 87.105772][ T80] __x64_sys_listxattr+0x173/0x230 [ 87.107938][ T80] do_syscall_64+0xf3/0x230 [ 87.110697][ T80] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.113164][ T80] [ 87.113164][ T80] -> #0 (&xfs_nondir_ilock_class#3){++++}-{3:3}: [ 87.116407][ T80] validate_chain+0x18e0/0x5900 [ 87.118486][ T80] __lock_acquire+0x137a/0x2040 [ 87.120529][ T80] lock_acquire+0x1ed/0x550 [ 87.122478][ T80] down_write_nested+0xa2/0x220 [ 87.124494][ T80] xfs_icwalk_ag+0x120e/0x1ad0 [ 87.126559][ T80] xfs_reclaim_inodes_nr+0x2d4/0x3e0 [ 87.128695][ T80] super_cache_scan+0x40f/0x4b0 [ 87.130634][ T80] do_shrink_slab+0x701/0x1160 [ 87.132598][ T80] shrink_slab+0x1093/0x14d0 [ 87.134557][ T80] shrink_one+0x43b/0x850 [ 87.136451][ T80] shrink_node+0x3799/0x3de0 [ 87.138453][ T80] kswapd+0x1bcd/0x35a0 [ 87.140287][ T80] kthread+0x2f0/0x390 [ 87.142084][ T80] ret_from_fork+0x4b/0x80 [ 87.143985][ T80] ret_from_fork_asm+0x1a/0x30 [ 87.146015][ T80] [ 87.146015][ T80] other info that might help us debug this: [ 87.146015][ T80] [ 87.149709][ T80] Possible unsafe locking scenario: [ 87.149709][ T80] [ 87.152491][ T80] CPU0 CPU1 [ 87.154522][ T80] ---- ---- [ 87.156540][ T80] lock(fs_reclaim); [ 87.158113][ T80] lock(&xfs_nondir_ilock_class#3); [ 87.161111][ T80] lock(fs_reclaim); [ 87.163597][ T80] lock(&xfs_nondir_ilock_class#3); [ 87.165642][ T80] [ 87.165642][ T80] *** DEADLOCK *** [ 87.165642][ T80] [ 87.168731][ T80] 2 locks held by kswapd0/80: [ 87.170546][ T80] #0: ffffffff8ea2fce0 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0xbb4/0x35a0 [ 87.173759][ T80] #1: ffff88801b3fa0e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_cache_scan+0x94/0x4b0 [ 87.177648][ T80] [ 87.177648][ T80] stack backtrace: [ 87.179964][ T80] CPU: 0 UID: 0 PID: 80 Comm: kswapd0 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 [ 87.183876][ T80] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 87.187967][ T80] Call Trace: [ 87.189275][ T80] [ 87.190422][ T80] dump_stack_lvl+0x241/0x360 [ 87.192200][ T80] ? __pfx_dump_stack_lvl+0x10/0x10 [ 87.194175][ T80] ? print_circular_bug+0x130/0x1a0 [ 87.196060][ T80] check_noncircular+0x36a/0x4a0 [ 87.198034][ T80] ? __pfx_check_noncircular+0x10/0x10 [ 87.200084][ T80] validate_chain+0x18e0/0x5900 [ 87.201992][ T80] ? __pfx_validate_chain+0x10/0x10 [ 87.204001][ T80] ? __pfx_validate_chain+0x10/0x10 [ 87.206011][ T80] ? stack_trace_save+0x118/0x1d0 [ 87.207929][ T80] ? stack_depot_save_flags+0x6e4/0x830 [ 87.210044][ T80] ? mark_lock+0x9a/0x350 [ 87.211730][ T80] __lock_acquire+0x137a/0x2040 [ 87.213557][ T80] lock_acquire+0x1ed/0x550 [ 87.215073][ T80] ? xfs_icwalk_ag+0x120e/0x1ad0 [ 87.216802][ T80] ? __pfx_lock_acquire+0x10/0x10 [ 87.218563][ T80] ? __pfx___might_resched+0x10/0x10 [ 87.220392][ T80] ? xfs_icwalk_ag+0x11fc/0x1ad0 [ 87.222152][ T80] ? __pfx_lock_release+0x10/0x10 [ 87.223877][ T80] down_write_nested+0xa2/0x220 [ 87.225565][ T80] ? xfs_icwalk_ag+0x120e/0x1ad0 [ 87.227323][ T80] ? __pfx_down_write_nested+0x10/0x10 [ 87.229475][ T80] ? xfs_icwalk_ag+0x120e/0x1ad0 [ 87.231402][ T80] ? xfs_icwalk_ag+0x120e/0x1ad0 [ 87.233315][ T80] ? xfs_ilock+0x219/0x3d0 [ 87.235061][ T80] xfs_icwalk_ag+0x120e/0x1ad0 [ 87.236950][ T80] ? __pfx_xfs_icwalk_ag+0x10/0x10 [ 87.238936][ T80] ? xfs_perag_grab_tag+0xad/0x6a0 [ 87.240956][ T80] ? __pfx_xfs_perag_grab_tag+0x10/0x10 [ 87.243082][ T80] ? xfs_reclaim_work_queue+0x1a/0x220 [ 87.245194][ T80] xfs_reclaim_inodes_nr+0x2d4/0x3e0 [ 87.247221][ T80] ? __pfx_xfs_reclaim_inodes_nr+0x10/0x10 [ 87.249395][ T80] ? list_lru_count_one+0x29/0x2e0 [ 87.251337][ T80] ? list_lru_count_one+0x283/0x2e0 [ 87.253273][ T80] ? list_lru_count_one+0x29/0x2e0 [ 87.255228][ T80] super_cache_scan+0x40f/0x4b0 [ 87.257110][ T80] do_shrink_slab+0x701/0x1160 [ 87.258964][ T80] ? shrink_slab+0x12b/0x14d0 [ 87.260797][ T80] shrink_slab+0x1093/0x14d0 [ 87.262622][ T80] ? shrink_slab+0x12b/0x14d0 [ 87.264424][ T80] ? __pfx_shrink_slab+0x10/0x10 [ 87.266305][ T80] ? shrink_node+0x3547/0x3de0 [ 87.268150][ T80] ? __pfx_lock_release+0x10/0x10 [ 87.270129][ T80] shrink_one+0x43b/0x850 [ 87.271800][ T80] ? shrink_node+0x3547/0x3de0 [ 87.273710][ T80] shrink_node+0x3799/0x3de0 [ 87.275527][ T80] ? shrink_node+0x3547/0x3de0 [ 87.277424][ T80] ? __pfx_lock_acquire+0x10/0x10 [ 87.279396][ T80] ? mem_cgroup_iter+0x3a/0x560 [ 87.281302][ T80] ? __pfx_lock_release+0x10/0x10 [ 87.283146][ T80] ? __pfx_shrink_node+0x10/0x10 [ 87.285039][ T80] ? mem_cgroup_iter+0x3a/0x560 [ 87.286946][ T80] ? mem_cgroup_iter+0x3e9/0x560 [ 87.288867][ T80] ? mem_cgroup_iter+0x3a/0x560 [ 87.290802][ T80] kswapd+0x1bcd/0x35a0 [ 87.292411][ T80] ? kswapd+0xbb4/0x35a0 [ 87.294017][ T80] ? __pfx_kswapd+0x10/0x10 [ 87.295775][ T80] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 87.298095][ T80] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 87.300533][ T80] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 87.303000][ T80] ? __pfx_autoremove_wake_function+0x10/0x10 [ 87.305321][ T80] ? __kthread_parkme+0x169/0x1d0 [ 87.307246][ T80] ? __pfx_kswapd+0x10/0x10 [ 87.309035][ T80] kthread+0x2f0/0x390 [ 87.310612][ T80] ? __pfx_kswapd+0x10/0x10 [ 87.312363][ T80] ? __pfx_kthread+0x10/0x10 [ 87.314136][ T80] ret_from_fork+0x4b/0x80 [ 87.315886][ T80] ? __pfx_kthread+0x10/0x10 [ 87.317721][ T80] ret_from_fork_asm+0x1a/0x30 [ 87.319530][ T80] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program VM DIAGNOSIS: 04:18:31 Registers: info registers vcpu 0 CPU#0 RAX=0000000000000032 RBX=ffffffff95254f80 RCX=0000000000000000 RDX=00000000000003f8 RSI=0000000000000000 RDI=0000000000000020 RBP=0000000000000000 RSP=ffffc90000e461d0 R8 =ffffffff853f0bbb R9 =1ffff110031c2046 R10=dffffc0000000000 R11=ffffffff853f0b70 R12=dffffc0000000000 R13=0000000000000032 R14=0000000000000032 R15=00000000000003f8 RIP=ffffffff853f0bee RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 0000000000000000 ffffffff 00c00000 GS =0000 ffff888020800000 ffffffff 00c00000 LDT=0000 0000000000000000 ffffffff 00c00000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff2b4231000 CR3=000000001e10a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 Opmask00=0000000000440401 Opmask01=0000000000000001 Opmask02=00000000fff7ffff Opmask03=0000000000000000 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