syzkaller login: [ 30.988196] BUG: Bad rss-counter state mm:00000000084d9ba2 type:MM_FILEPAGES val:33 [ 30.989478] BUG: Bad rss-counter state mm:00000000084d9ba2 type:MM_ANONPAGES val:22 [ 31.138106] ================================================================== [ 31.139192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.140322] Read of size 8 at addr ffff888019de13f8 by task sshd/219 [ 31.141213] [ 31.141425] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.142243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.143170] Call Trace: [ 31.143474] [ 31.143742] dump_stack_lvl+0x91/0xf0 [ 31.144210] print_report+0xcc/0x620 [ 31.144668] ? __virt_addr_valid+0x102/0x340 [ 31.145187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146352] kasan_report+0xbe/0xf0 [ 31.146806] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147389] vma_interval_tree_remove+0xc75/0xec0 [ 31.147960] vma_prepare+0xc54/0x11a0 [ 31.148434] __split_vma+0x5af/0x950 [ 31.148891] ? __pfx___split_vma+0x10/0x10 [ 31.149415] ? find_held_lock+0x2c/0x110 [ 31.149946] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.150529] ? lock_is_held_type+0x9f/0x120 [ 31.151076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.151691] ? mtree_range_walk+0x632/0x900 [ 31.152248] ? mas_walk+0x5c7/0x7c0 [ 31.152719] do_vmi_munmap+0x1f1/0x2b0 [ 31.153208] mmap_region+0x1f9/0x2660 [ 31.153695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.154212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154919] ? __pfx_lock_acquire+0x10/0x10 [ 31.155464] ? __pfx_mmap_region+0x10/0x10 [ 31.156002] ? security_mmap_addr+0x7d/0xa0 [ 31.156532] ? get_unmapped_area+0x1f5/0x3f0 [ 31.157095] do_mmap+0x854/0xf00 [ 31.157527] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.158021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.158590] ksys_mmap_pgoff+0x3af/0x500 [ 31.159103] do_syscall_64+0x3f/0x90 [ 31.159581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160227] RIP: 0033:0x7fb0333c5d82 [ 31.160684] 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 [ 31.162834] RSP: 002b:00007ffe7621e4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.163738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0333c5d82 [ 31.164596] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0327ff000 [ 31.165440] RBP: 00007fb0327ff000 R08: 0000000000000009 R09: 0000000000001000 [ 31.166293] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb0a1b8ec0 [ 31.167152] R13: 00007ffe7621e510 R14: 00007ffe7621e540 R15: 00007ffe7621e8a0 [ 31.168014] [ 31.168310] [ 31.168525] Allocated by task 212: [ 31.168956] kasan_save_stack+0x22/0x50 [ 31.169453] kasan_set_track+0x25/0x30 [ 31.169946] __kasan_slab_alloc+0x59/0x70 [ 31.170494] kmem_cache_alloc+0x16b/0x370 [ 31.171018] vm_area_dup+0x20/0x160 [ 31.171466] __split_vma+0x170/0x950 [ 31.171935] split_vma+0xc6/0x110 [ 31.172377] mprotect_fixup+0x8d2/0xb30 [ 31.172874] do_mprotect_pkey+0x87e/0xd40 [ 31.173393] __x64_sys_mprotect+0x78/0xc0 [ 31.173914] do_syscall_64+0x3f/0x90 [ 31.174398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175025] [ 31.175239] Freed by task 212: [ 31.175633] kasan_save_stack+0x22/0x50 [ 31.176144] kasan_set_track+0x25/0x30 [ 31.176627] kasan_save_free_info+0x2b/0x50 [ 31.177161] __kasan_slab_free+0x10a/0x190 [ 31.177696] kmem_cache_free+0x10d/0x4d0 [ 31.178203] rcu_core+0x8c8/0x2860 [ 31.178643] __do_softirq+0x1b7/0x7d4 [ 31.179127] [ 31.179343] Last potentially related work creation: [ 31.179927] kasan_save_stack+0x22/0x50 [ 31.180427] __kasan_record_aux_stack+0x8e/0xa0 [ 31.180987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.181626] remove_vma+0x139/0x170 [ 31.182079] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.182656] do_vmi_munmap+0x1f1/0x2b0 [ 31.183152] __vm_munmap+0x138/0x3a0 [ 31.183609] __x64_sys_munmap+0x59/0x80 [ 31.184104] do_syscall_64+0x3f/0x90 [ 31.184580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185218] [ 31.185432] The buggy address belongs to the object at ffff888019de13a0 [ 31.185432] which belongs to the cache vm_area_struct of size 168 [ 31.186917] The buggy address is located 88 bytes inside of [ 31.186917] freed 168-byte region [ffff888019de13a0, ffff888019de1448) [ 31.188331] [ 31.188544] The buggy address belongs to the physical page: [ 31.189208] page:000000006f71dda8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19de1 [ 31.190304] memcg:ffff88800cfeee01 [ 31.190731] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.191384] page_type: 0xffffffff() [ 31.191832] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.192763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfeee01 [ 31.193686] page dumped because: kasan: bad access detected [ 31.194365] [ 31.194582] Memory state around the buggy address: [ 31.195169] ffff888019de1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.196034] ffff888019de1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.196901] >ffff888019de1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.197769] ^ [ 31.198637] ffff888019de1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.199503] ffff888019de1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.200365] ================================================================== [ 31.201336] Disabling lock debugging due to kernel taint [ 33.194725] BUG: Bad rss-counter state mm:0000000027d14a68 type:MM_FILEPAGES val:33 [ 33.195849] BUG: Bad rss-counter state mm:0000000027d14a68 type:MM_ANONPAGES val:22 [ 33.599100] BUG: Bad rss-counter state mm:000000003c85fbcd type:MM_FILEPAGES val:33 [ 33.600282] BUG: Bad rss-counter state mm:000000003c85fbcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51942' (ECDSA) to the list of known hosts. 2023/06/20 13:21:08 fuzzer started 2023/06/20 13:21:09 dialing manager at localhost:36067 2023/06/20 13:21:09 checking machine... 2023/06/20 13:21:09 checking revisions... [ 34.278226] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:21:09 testing simple program... [ 34.333762] cgroup: Unknown subsys name 'net' [ 34.373714] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:21:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff8880165c8000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800f642100 RIP=ffffffff814c0408 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 00007fc1bc039900 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=00007ffd7ba8c000 CR3=000000000f2b4000 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=0000000000000001 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=00007f08caa11ac0 CR3=000000000d61a000 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=00000000000000000000000000000000 XMM01=4112ca7b798c508716465ee6195437c3 XMM02=ec2efd57dc4c00df000000000011ace0 XMM03=af9a516008e8df51000000000011adb0 XMM04=9d706e57038b0a5100000000000ae988 XMM05=dfcdbad4f1609c370000000000132078 XMM06=1603ca6c15d0eba30000000000130ee0 XMM07=e042d86d42eb936e0000000000122470 XMM08=af9a516008e8df51000000000011adb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000