syzkaller login: [ 31.740309] BUG: Bad rss-counter state mm:00000000fa51d49d type:MM_FILEPAGES val:33 [ 31.742035] BUG: Bad rss-counter state mm:00000000fa51d49d type:MM_ANONPAGES val:22 [ 31.908930] ================================================================== [ 31.910074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.911227] Read of size 8 at addr ffff88800c5ef880 by task sshd/219 [ 31.912354] [ 31.912622] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.913684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.914915] Call Trace: [ 31.915270] [ 31.915576] dump_stack_lvl+0x91/0xf0 [ 31.916118] print_report+0xcc/0x620 [ 31.916654] ? __virt_addr_valid+0x102/0x340 [ 31.917241] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.917895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.918553] kasan_report+0xbe/0xf0 [ 31.919065] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.919730] vma_interval_tree_remove+0xc75/0xec0 [ 31.920389] vma_prepare+0xc54/0x11a0 [ 31.920903] __split_vma+0x5af/0x950 [ 31.921411] ? __pfx___split_vma+0x10/0x10 [ 31.921982] ? find_held_lock+0x2c/0x110 [ 31.922543] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.923140] ? lock_is_held_type+0x9f/0x120 [ 31.923726] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.924399] ? mtree_range_walk+0x632/0x900 [ 31.924996] ? mas_walk+0x5c7/0x7c0 [ 31.925514] do_vmi_munmap+0x1f1/0x2b0 [ 31.926045] mmap_region+0x1f9/0x2660 [ 31.926568] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.927123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.927896] ? __pfx_lock_acquire+0x10/0x10 [ 31.928489] ? __pfx_mmap_region+0x10/0x10 [ 31.929063] ? security_mmap_addr+0x7d/0xa0 [ 31.929632] ? get_unmapped_area+0x1f5/0x3f0 [ 31.930225] do_mmap+0x854/0xf00 [ 31.930693] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.931222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.931825] ksys_mmap_pgoff+0x3af/0x500 [ 31.932392] do_syscall_64+0x3f/0x90 [ 31.932915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.933610] RIP: 0033:0x7f101b8a6d82 [ 31.934109] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.936432] RSP: 002b:00007fffccd65f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.937411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f101b8a6d82 [ 31.938328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f101ace0000 [ 31.939232] RBP: 00007f101ace0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.940134] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654a4a63ec0 [ 31.941055] R13: 00007fffccd65f80 R14: 00007fffccd65fb0 R15: 00007fffccd66310 [ 31.941963] [ 31.942274] [ 31.942497] Allocated by task 212: [ 31.942957] kasan_save_stack+0x22/0x50 [ 31.943494] kasan_set_track+0x25/0x30 [ 31.944019] __kasan_slab_alloc+0x59/0x70 [ 31.944576] kmem_cache_alloc+0x16b/0x370 [ 31.945121] vm_area_dup+0x20/0x160 [ 31.945605] __split_vma+0x170/0x950 [ 31.946099] split_vma+0xc6/0x110 [ 31.946565] mprotect_fixup+0x8d2/0xb30 [ 31.947094] do_mprotect_pkey+0x87e/0xd40 [ 31.947654] __x64_sys_mprotect+0x78/0xc0 [ 31.948209] do_syscall_64+0x3f/0x90 [ 31.948738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.949419] [ 31.949649] Freed by task 212: [ 31.950077] kasan_save_stack+0x22/0x50 [ 31.950608] kasan_set_track+0x25/0x30 [ 31.951129] kasan_save_free_info+0x2b/0x50 [ 31.951696] __kasan_slab_free+0x10a/0x190 [ 31.952264] kmem_cache_free+0x10d/0x4d0 [ 31.952848] rcu_core+0x8c8/0x2860 [ 31.953321] __do_softirq+0x1b7/0x7d4 [ 31.953823] [ 31.954053] Last potentially related work creation: [ 31.954676] kasan_save_stack+0x22/0x50 [ 31.955207] __kasan_record_aux_stack+0x8e/0xa0 [ 31.955812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.956512] remove_vma+0x139/0x170 [ 31.956984] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.957570] do_vmi_munmap+0x1f1/0x2b0 [ 31.958080] __vm_munmap+0x138/0x3a0 [ 31.958570] __x64_sys_munmap+0x59/0x80 [ 31.959087] do_syscall_64+0x3f/0x90 [ 31.959590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.960280] [ 31.960503] The buggy address belongs to the object at ffff88800c5ef828 [ 31.960503] which belongs to the cache vm_area_struct of size 168 [ 31.962061] The buggy address is located 88 bytes inside of [ 31.962061] freed 168-byte region [ffff88800c5ef828, ffff88800c5ef8d0) [ 31.963535] [ 31.963762] The buggy address belongs to the physical page: [ 31.964469] page:000000004efbf727 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5ef [ 31.965615] memcg:ffff88800e0f8a01 [ 31.966062] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.966743] page_type: 0xffffffff() [ 31.967220] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.968192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f8a01 [ 31.969181] page dumped because: kasan: bad access detected [ 31.969882] [ 31.970108] Memory state around the buggy address: [ 31.970721] ffff88800c5ef780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.971616] ffff88800c5ef800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.972512] >ffff88800c5ef880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.973401] ^ [ 31.973827] ffff88800c5ef900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.974716] ffff88800c5ef980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.975606] ================================================================== [ 31.976764] Disabling lock debugging due to kernel taint [ 34.793205] BUG: Bad rss-counter state mm:00000000de7ce544 type:MM_FILEPAGES val:33 [ 34.794412] BUG: Bad rss-counter state mm:00000000de7ce544 type:MM_ANONPAGES val:22 [ 35.217179] BUG: Bad rss-counter state mm:000000002f862c3c type:MM_FILEPAGES val:33 [ 35.218840] BUG: Bad rss-counter state mm:000000002f862c3c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6859' (ECDSA) to the list of known hosts. 2023/06/21 01:41:00 fuzzer started 2023/06/21 01:41:01 dialing manager at localhost:36067 2023/06/21 01:41:01 checking machine... 2023/06/21 01:41:01 checking revisions... [ 35.974635] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:41:01 testing simple program... [ 36.021760] cgroup: Unknown subsys name 'net' [ 36.067093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8363e261 RCX=0000000000000001 RDX=1ffff11003959eb7 RSI=ffff88801cacfed8 RDI=ffffffff8363e261 RBP=ffff88801cacf5b8 RSP=ffff88801cacf530 R8 =0000000000000001 R9 =ffff88801cacf5a0 R10=0000000000038001 R11=000000000008aa79 R12=ffff88801cacf628 R13=0000000000000000 R14=ffff888015980000 R15=ffff88801816e390 RIP=ffffffff811fc7a0 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5a9d3ff900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcabbb9000 CR3=000000001c98e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 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 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9544767020 CR3=000000000cb46000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 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 XMM00=2030303a31343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a31343a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000