syzkaller login: [ 31.721265] BUG: Bad rss-counter state mm:00000000f4f8ae78 type:MM_FILEPAGES val:32 [ 31.722756] BUG: Bad rss-counter state mm:00000000f4f8ae78 type:MM_ANONPAGES val:22 [ 31.864584] ================================================================== [ 31.865507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.866673] Read of size 8 at addr ffff8880168d8058 by task sshd/220 [ 31.867643] [ 31.868120] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.869214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.870522] Call Trace: [ 31.870948] [ 31.871322] dump_stack_lvl+0x91/0xf0 [ 31.871972] print_report+0xcc/0x620 [ 31.872602] ? __virt_addr_valid+0x102/0x340 [ 31.873349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874218] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875103] kasan_report+0xbe/0xf0 [ 31.875771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.876638] vma_interval_tree_remove+0xc75/0xec0 [ 31.877490] vma_prepare+0xc54/0x11a0 [ 31.878183] __split_vma+0x5af/0x950 [ 31.878861] ? __pfx___split_vma+0x10/0x10 [ 31.879608] ? find_held_lock+0x2c/0x110 [ 31.880347] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.881134] ? lock_is_held_type+0x9f/0x120 [ 31.881920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.882790] ? mtree_range_walk+0x632/0x900 [ 31.883569] ? mas_walk+0x5c7/0x7c0 [ 31.884232] do_vmi_munmap+0x1f1/0x2b0 [ 31.884928] mmap_region+0x1f9/0x2660 [ 31.885612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.886343] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.887352] ? __pfx_lock_acquire+0x10/0x10 [ 31.888107] ? __pfx_mmap_region+0x10/0x10 [ 31.888857] ? security_mmap_addr+0x7d/0xa0 [ 31.889607] ? get_unmapped_area+0x1f5/0x3f0 [ 31.890392] do_mmap+0x854/0xf00 [ 31.891009] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.891717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.892512] ksys_mmap_pgoff+0x3af/0x500 [ 31.893234] do_syscall_64+0x3f/0x90 [ 31.893918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.894812] RIP: 0033:0x7f0049780d82 [ 31.895460] 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 [ 31.898511] RSP: 002b:00007ffed1fd0188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.899782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0049780d82 [ 31.900992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0048bba000 [ 31.902101] RBP: 00007f0048bba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.902984] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555daa1a6ec0 [ 31.903868] R13: 00007ffed1fd01a0 R14: 00007ffed1fd01d0 R15: 00007ffed1fd0530 [ 31.904749] [ 31.905053] [ 31.905274] Allocated by task 213: [ 31.905718] kasan_save_stack+0x22/0x50 [ 31.906241] kasan_set_track+0x25/0x30 [ 31.906748] __kasan_slab_alloc+0x59/0x70 [ 31.907287] kmem_cache_alloc+0x16b/0x370 [ 31.907818] vm_area_dup+0x20/0x160 [ 31.908288] __split_vma+0x170/0x950 [ 31.908768] split_vma+0xc6/0x110 [ 31.909295] mprotect_fixup+0x8d2/0xb30 [ 31.909833] do_mprotect_pkey+0x87e/0xd40 [ 31.910374] __x64_sys_mprotect+0x78/0xc0 [ 31.910913] do_syscall_64+0x3f/0x90 [ 31.911405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912065] [ 31.912284] Freed by task 203: [ 31.912697] kasan_save_stack+0x22/0x50 [ 31.913224] kasan_set_track+0x25/0x30 [ 31.913750] kasan_save_free_info+0x2b/0x50 [ 31.914305] __kasan_slab_free+0x10a/0x190 [ 31.914854] kmem_cache_free+0x10d/0x4d0 [ 31.915379] rcu_core+0x8c8/0x2860 [ 31.915839] __do_softirq+0x1b7/0x7d4 [ 31.916331] [ 31.916552] Last potentially related work creation: [ 31.917156] kasan_save_stack+0x22/0x50 [ 31.917686] __kasan_record_aux_stack+0x8e/0xa0 [ 31.918287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.918943] remove_vma+0x139/0x170 [ 31.919415] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.919999] do_vmi_munmap+0x1f1/0x2b0 [ 31.920497] __vm_munmap+0x138/0x3a0 [ 31.920977] __x64_sys_munmap+0x59/0x80 [ 31.921487] do_syscall_64+0x3f/0x90 [ 31.921989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.922661] [ 31.922882] The buggy address belongs to the object at ffff8880168d8000 [ 31.922882] which belongs to the cache vm_area_struct of size 168 [ 31.924425] The buggy address is located 88 bytes inside of [ 31.924425] freed 168-byte region [ffff8880168d8000, ffff8880168d80a8) [ 31.925902] [ 31.926129] The buggy address belongs to the physical page: [ 31.926813] page:00000000b0cce887 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168d8 [ 31.927944] memcg:ffff8880169abf01 [ 31.928390] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.929061] page_type: 0xffffffff() [ 31.929533] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.930507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169abf01 [ 31.931440] page dumped because: kasan: bad access detected [ 31.932126] [ 31.932347] Memory state around the buggy address: [ 31.932948] ffff8880168d7f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.933837] ffff8880168d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.934731] >ffff8880168d8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.935614] ^ [ 31.936378] ffff8880168d8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.937270] ffff8880168d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.938164] ================================================================== [ 31.939374] Disabling lock debugging due to kernel taint [ 33.945891] BUG: Bad rss-counter state mm:00000000b3e3f329 type:MM_FILEPAGES val:33 [ 33.947076] BUG: Bad rss-counter state mm:00000000b3e3f329 type:MM_ANONPAGES val:22 [ 34.402898] BUG: Bad rss-counter state mm:000000001416446c type:MM_FILEPAGES val:33 [ 34.403832] BUG: Bad rss-counter state mm:000000001416446c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52943' (ECDSA) to the list of known hosts. 2023/06/19 18:46:07 fuzzer started 2023/06/19 18:46:08 dialing manager at localhost:44161 2023/06/19 18:46:08 checking machine... 2023/06/19 18:46:08 checking revisions... [ 35.125086] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:46:08 testing simple program... [ 35.167431] cgroup: Unknown subsys name 'net' [ 35.206587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:46:06 Registers: info registers vcpu 0 RAX=1ffffffff0baf313 RBX=ffffffff85d7989c RCX=ffffffff8100455b RDX=0000000000000000 RSI=ffffffff86072abc RDI=ffffffff85d79874 RBP=ffffffff85d7989c RSP=ffff888008d7f8c0 R8 =ffffffff86072abc R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000000128 R12=ffffffff85d7989c R13=ffffffff85d79874 R14=ffffffff85d79898 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 0000000000000000 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=00007fff30fb6a38 CR3=0000000009b36000 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=2037303a36343a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b6880 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f0bf738 RSP=ffff88800f0bf670 R8 =ffffffff863b6884 R9 =ffff88800f0bf720 R10=0000000000038001 R11=000000000008b61a R12=ffff88800f0bf740 R13=ffff88800f0bf728 R14=ffff88800f0bf721 R15=ffff88800f0bf6e0 RIP=ffffffff81130b06 RFL=00000297 [--S-APC] 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 00007f8d74e2d900 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=00007ffc1733d000 CR3=000000000ded8000 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=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