syzkaller login: [ 37.719271] BUG: Bad rss-counter state mm:000000009afc0426 type:MM_FILEPAGES val:33 [ 37.720803] BUG: Bad rss-counter state mm:000000009afc0426 type:MM_ANONPAGES val:22 [ 37.866954] ================================================================== [ 37.867859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.868798] Read of size 8 at addr ffff8880096ed798 by task sshd/219 [ 37.869695] [ 37.869914] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.870799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.871786] Call Trace: [ 37.872104] [ 37.872388] dump_stack_lvl+0x91/0xf0 [ 37.872874] print_report+0xcc/0x620 [ 37.873355] ? __virt_addr_valid+0x102/0x340 [ 37.873905] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.874551] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.875166] kasan_report+0xbe/0xf0 [ 37.875642] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.876271] vma_interval_tree_remove+0xc75/0xec0 [ 37.876868] vma_prepare+0xc54/0x11a0 [ 37.877357] __split_vma+0x5af/0x950 [ 37.877831] ? __pfx___split_vma+0x10/0x10 [ 37.878371] ? find_held_lock+0x2c/0x110 [ 37.878897] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.879463] ? lock_is_held_type+0x9f/0x120 [ 37.879998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.880601] ? mtree_range_walk+0x632/0x900 [ 37.881162] ? mas_walk+0x5c7/0x7c0 [ 37.881632] do_vmi_munmap+0x1f1/0x2b0 [ 37.882132] mmap_region+0x1f9/0x2660 [ 37.882623] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.883143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.883863] ? __pfx_lock_acquire+0x10/0x10 [ 37.884393] ? __pfx_mmap_region+0x10/0x10 [ 37.884923] ? security_mmap_addr+0x7d/0xa0 [ 37.885457] ? get_unmapped_area+0x1f5/0x3f0 [ 37.886031] do_mmap+0x854/0xf00 [ 37.886470] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.886972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.887539] ksys_mmap_pgoff+0x3af/0x500 [ 37.888047] do_syscall_64+0x3f/0x90 [ 37.888525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.889167] RIP: 0033:0x7fc222a91d82 [ 37.889622] 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 [ 37.891756] RSP: 002b:00007ffd8bbc47e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.892656] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc222a91d82 [ 37.893502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc221ecb000 [ 37.894366] RBP: 00007fc221ecb000 R08: 0000000000000009 R09: 0000000000001000 [ 37.895214] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c66eb6aec0 [ 37.896055] R13: 00007ffd8bbc4800 R14: 00007ffd8bbc4830 R15: 00007ffd8bbc4b90 [ 37.896916] [ 37.897208] [ 37.897425] Allocated by task 212: [ 37.897851] kasan_save_stack+0x22/0x50 [ 37.898377] kasan_set_track+0x25/0x30 [ 37.898868] __kasan_slab_alloc+0x59/0x70 [ 37.899399] kmem_cache_alloc+0x16b/0x370 [ 37.899924] vm_area_dup+0x20/0x160 [ 37.900374] __split_vma+0x170/0x950 [ 37.900838] split_vma+0xc6/0x110 [ 37.901282] mprotect_fixup+0x8d2/0xb30 [ 37.901791] do_mprotect_pkey+0x87e/0xd40 [ 37.902317] __x64_sys_mprotect+0x78/0xc0 [ 37.902839] do_syscall_64+0x3f/0x90 [ 37.903308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.903951] [ 37.904174] Freed by task 212: [ 37.904564] kasan_save_stack+0x22/0x50 [ 37.905071] kasan_set_track+0x25/0x30 [ 37.905577] kasan_save_free_info+0x2b/0x50 [ 37.906138] __kasan_slab_free+0x10a/0x190 [ 37.906673] kmem_cache_free+0x10d/0x4d0 [ 37.907186] rcu_core+0x8c8/0x2860 [ 37.907642] __do_softirq+0x1b7/0x7d4 [ 37.908130] [ 37.908346] Last potentially related work creation: [ 37.908934] kasan_save_stack+0x22/0x50 [ 37.909441] __kasan_record_aux_stack+0x8e/0xa0 [ 37.910042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.910688] remove_vma+0x139/0x170 [ 37.911139] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.911697] do_vmi_munmap+0x1f1/0x2b0 [ 37.912180] __vm_munmap+0x138/0x3a0 [ 37.912654] __x64_sys_munmap+0x59/0x80 [ 37.913151] do_syscall_64+0x3f/0x90 [ 37.913638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.914294] [ 37.914510] The buggy address belongs to the object at ffff8880096ed740 [ 37.914510] which belongs to the cache vm_area_struct of size 168 [ 37.915982] The buggy address is located 88 bytes inside of [ 37.915982] freed 168-byte region [ffff8880096ed740, ffff8880096ed7e8) [ 37.917390] [ 37.917608] The buggy address belongs to the physical page: [ 37.918280] page:000000004e060fc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96ed [ 37.919364] memcg:ffff88800d5a8701 [ 37.919789] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.920441] page_type: 0xffffffff() [ 37.920892] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.921815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5a8701 [ 37.922729] page dumped because: kasan: bad access detected [ 37.923392] [ 37.923610] Memory state around the buggy address: [ 37.924194] ffff8880096ed680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.925048] ffff8880096ed700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.925905] >ffff8880096ed780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.926758] ^ [ 37.927250] ffff8880096ed800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.928103] ffff8880096ed880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.928956] ================================================================== [ 37.929989] Disabling lock debugging due to kernel taint [ 40.107655] BUG: Bad rss-counter state mm:00000000300e62a9 type:MM_FILEPAGES val:33 [ 40.109093] BUG: Bad rss-counter state mm:00000000300e62a9 type:MM_ANONPAGES val:22 [ 40.571336] BUG: Bad rss-counter state mm:00000000958a11fd type:MM_FILEPAGES val:33 [ 40.572597] BUG: Bad rss-counter state mm:00000000958a11fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61251' (ECDSA) to the list of known hosts. 2023/06/19 12:23:26 fuzzer started 2023/06/19 12:23:26 dialing manager at localhost:44161 2023/06/19 12:23:26 checking machine... 2023/06/19 12:23:26 checking revisions... [ 41.281561] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:23:26 testing simple program... [ 41.324211] cgroup: Unknown subsys name 'net' [ 41.373775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:23:20 Registers: info registers vcpu 0 RAX=ffffed1002e8bf31 RBX=1ffff11002e8bf31 RCX=1ffff1100127f35e RDX=0000000000000001 RSI=ffff8880174a5984 RDI=ffff8880093f9b8c RBP=00000000000000e8 RSP=ffff88801745f988 R8 =0000000000000001 R9 =ffff8880093f9b8c R10=ffff8880093f9b43 R11=00000000000b6996 R12=ffff88801673d140 R13=0000000000000000 R14=ffff8880093f9af8 R15=ffff8880093f9ab0 RIP=ffffffff81845fe9 RFL=00000282 [--S----] 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 00007f27bfdfb900 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=00007ffc5201a000 CR3=000000000e7ca000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f67fdc55080 CR3=0000000013e96000 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=830e7f1daeaeaa9dfd46ee0a3a195fdd XMM02=000000000011eb60eff9b2d0a8fce9cb XMM03=000000000011ec302c67c8bc2e329bc3 XMM04=73dd7542094bd29500000000000ae988 XMM05=dfcdbad4f1609c370000000000135480 XMM06=a42a93af5befe46a00000000001342e8 XMM07=e042d86d42eb936e0000000000125b78 XMM08=e2abed1b320993a0000000000011ec30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000