syzkaller login: [ 28.720651] BUG: Bad rss-counter state mm:00000000046ce646 type:MM_FILEPAGES val:33 [ 28.722244] BUG: Bad rss-counter state mm:00000000046ce646 type:MM_ANONPAGES val:22 [ 28.869426] ================================================================== [ 28.870403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.871417] Read of size 8 at addr ffff88800ea2e140 by task sshd/221 [ 28.872374] [ 28.872605] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.873543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.874606] Call Trace: [ 28.874946] [ 28.875253] dump_stack_lvl+0x91/0xf0 [ 28.875785] print_report+0xcc/0x620 [ 28.876333] ? __virt_addr_valid+0x102/0x340 [ 28.876920] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877602] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878268] kasan_report+0xbe/0xf0 [ 28.878803] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879482] vma_interval_tree_remove+0xc75/0xec0 [ 28.880151] vma_prepare+0xc54/0x11a0 [ 28.880684] __split_vma+0x5af/0x950 [ 28.881189] ? __pfx___split_vma+0x10/0x10 [ 28.881751] ? find_held_lock+0x2c/0x110 [ 28.882318] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.882920] ? lock_is_held_type+0x9f/0x120 [ 28.883499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.884131] ? mtree_range_walk+0x632/0x900 [ 28.884730] ? mas_walk+0x5c7/0x7c0 [ 28.885230] do_vmi_munmap+0x1f1/0x2b0 [ 28.885748] mmap_region+0x1f9/0x2660 [ 28.886266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.886809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887571] ? __pfx_lock_acquire+0x10/0x10 [ 28.888143] ? __pfx_mmap_region+0x10/0x10 [ 28.888741] ? security_mmap_addr+0x7d/0xa0 [ 28.889295] ? get_unmapped_area+0x1f5/0x3f0 [ 28.889884] do_mmap+0x854/0xf00 [ 28.890358] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.890895] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.891489] ksys_mmap_pgoff+0x3af/0x500 [ 28.892039] do_syscall_64+0x3f/0x90 [ 28.892585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.893309] RIP: 0033:0x7f10f6aaad82 [ 28.893814] 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 [ 28.896174] RSP: 002b:00007ffc3672a168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.897202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10f6aaad82 [ 28.898152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10f5ee4000 [ 28.899099] RBP: 00007f10f5ee4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.900026] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631a041fec0 [ 28.900995] R13: 00007ffc3672a180 R14: 00007ffc3672a1b0 R15: 00007ffc3672a510 [ 28.901950] [ 28.902278] [ 28.902516] Allocated by task 214: [ 28.902991] kasan_save_stack+0x22/0x50 [ 28.903552] kasan_set_track+0x25/0x30 [ 28.904104] __kasan_slab_alloc+0x59/0x70 [ 28.904689] kmem_cache_alloc+0x16b/0x370 [ 28.905265] vm_area_dup+0x20/0x160 [ 28.905773] __split_vma+0x170/0x950 [ 28.906291] split_vma+0xc6/0x110 [ 28.906774] mprotect_fixup+0x8d2/0xb30 [ 28.907328] do_mprotect_pkey+0x87e/0xd40 [ 28.907906] __x64_sys_mprotect+0x78/0xc0 [ 28.908514] do_syscall_64+0x3f/0x90 [ 28.909037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.909760] [ 28.909999] Freed by task 214: [ 28.910424] kasan_save_stack+0x22/0x50 [ 28.910982] kasan_set_track+0x25/0x30 [ 28.911523] kasan_save_free_info+0x2b/0x50 [ 28.912110] __kasan_slab_free+0x10a/0x190 [ 28.912709] kmem_cache_free+0x10d/0x4d0 [ 28.913270] rcu_core+0x8c8/0x2860 [ 28.913771] __do_softirq+0x1b7/0x7d4 [ 28.914294] [ 28.914535] Last potentially related work creation: [ 28.915193] kasan_save_stack+0x22/0x50 [ 28.915746] __kasan_record_aux_stack+0x8e/0xa0 [ 28.916409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.917130] remove_vma+0x139/0x170 [ 28.917628] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.918256] do_vmi_munmap+0x1f1/0x2b0 [ 28.918804] __vm_munmap+0x138/0x3a0 [ 28.919334] __x64_sys_munmap+0x59/0x80 [ 28.919894] do_syscall_64+0x3f/0x90 [ 28.920427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.921116] [ 28.921340] The buggy address belongs to the object at ffff88800ea2e0e8 [ 28.921340] which belongs to the cache vm_area_struct of size 168 [ 28.922893] The buggy address is located 88 bytes inside of [ 28.922893] freed 168-byte region [ffff88800ea2e0e8, ffff88800ea2e190) [ 28.924392] [ 28.924624] The buggy address belongs to the physical page: [ 28.925338] page:0000000010e15ff6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea2e [ 28.926500] memcg:ffff88800de56801 [ 28.926961] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.927641] page_type: 0xffffffff() [ 28.928119] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.929134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de56801 [ 28.930092] page dumped because: kasan: bad access detected [ 28.930784] [ 28.931019] Memory state around the buggy address: [ 28.931625] ffff88800ea2e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.932534] ffff88800ea2e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.933433] >ffff88800ea2e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934322] ^ [ 28.935003] ffff88800ea2e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.935909] ffff88800ea2e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.936816] ================================================================== [ 28.937831] Disabling lock debugging due to kernel taint [ 30.673786] BUG: Bad rss-counter state mm:000000009306af9a type:MM_FILEPAGES val:33 [ 30.675489] BUG: Bad rss-counter state mm:000000009306af9a type:MM_ANONPAGES val:22 [ 31.153489] BUG: Bad rss-counter state mm:00000000269af3d8 type:MM_FILEPAGES val:33 [ 31.154515] BUG: Bad rss-counter state mm:00000000269af3d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34074' (ECDSA) to the list of known hosts. 2023/06/20 15:32:08 fuzzer started 2023/06/20 15:32:08 dialing manager at localhost:36067 2023/06/20 15:32:08 checking machine... 2023/06/20 15:32:08 checking revisions... [ 31.903986] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:32:08 testing simple program... [ 31.951619] cgroup: Unknown subsys name 'net' [ 31.990127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100206507f RSI=ffffffff814c857a RDI=ffff8880103283f8 RBP=ffff888010328000 RSP=ffff88800edff838 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888010328000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff81374562 RFL=00000212 [----A--] 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 00007f45b8dd7900 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=00007ffe2615b000 CR3=00000000175f6000 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=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 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=00007efec91008d0 CR3=000000000ee4a000 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=069bb401d25a0899444c0651fbf7136f XMM02=000000000011ab90eff9b2d0a8fce9cb XMM03=000000000011ac602c67c8bc2e329bc3 XMM04=f5f3eca4e097dac000000000000ae988 XMM05=e4cb8bb95a7664b60000000000132240 XMM06=4cb13abc6f7a466400000000001310a8 XMM07=e042d86d42eb936e0000000000122688 XMM08=1cc6d0c84876c437000000000011ac60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000