syzkaller login: [ 38.729656] BUG: Bad rss-counter state mm:000000003ca4746a type:MM_FILEPAGES val:33 [ 38.731029] BUG: Bad rss-counter state mm:000000003ca4746a type:MM_ANONPAGES val:22 [ 38.883828] ================================================================== [ 38.884728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.885647] Read of size 8 at addr ffff88800eba1880 by task sshd/219 [ 38.886392] [ 38.886616] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.887605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.888554] Call Trace: [ 38.888871] [ 38.889252] dump_stack_lvl+0x91/0xf0 [ 38.889841] print_report+0xcc/0x620 [ 38.890438] ? __virt_addr_valid+0x102/0x340 [ 38.891117] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891856] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892608] kasan_report+0xbe/0xf0 [ 38.893175] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893924] vma_interval_tree_remove+0xc75/0xec0 [ 38.894650] vma_prepare+0xc54/0x11a0 [ 38.895256] __split_vma+0x5af/0x950 [ 38.895769] ? __pfx___split_vma+0x10/0x10 [ 38.896308] ? find_held_lock+0x2c/0x110 [ 38.896821] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.897393] ? lock_is_held_type+0x9f/0x120 [ 38.897922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.898540] ? mtree_range_walk+0x632/0x900 [ 38.899092] ? mas_walk+0x5c7/0x7c0 [ 38.899570] do_vmi_munmap+0x1f1/0x2b0 [ 38.900060] mmap_region+0x1f9/0x2660 [ 38.900550] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.901061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.901780] ? __pfx_lock_acquire+0x10/0x10 [ 38.902314] ? __pfx_mmap_region+0x10/0x10 [ 38.902882] ? security_mmap_addr+0x7d/0xa0 [ 38.903418] ? get_unmapped_area+0x1f5/0x3f0 [ 38.903946] do_mmap+0x854/0xf00 [ 38.904382] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.904879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905443] ksys_mmap_pgoff+0x3af/0x500 [ 38.905949] do_syscall_64+0x3f/0x90 [ 38.906433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907079] RIP: 0033:0x7f8ecf286d82 [ 38.907531] 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 [ 38.909678] RSP: 002b:00007ffc167cd5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.910575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ecf286d82 [ 38.911436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ece6c0000 [ 38.912290] RBP: 00007f8ece6c0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.913144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f53c3d3b20 [ 38.913992] R13: 00007ffc167cd5c0 R14: 00007ffc167cd5f0 R15: 00007ffc167cd950 [ 38.914867] [ 38.915164] [ 38.915383] Allocated by task 212: [ 38.915821] kasan_save_stack+0x22/0x50 [ 38.916320] kasan_set_track+0x25/0x30 [ 38.916806] __kasan_slab_alloc+0x59/0x70 [ 38.917338] kmem_cache_alloc+0x16b/0x370 [ 38.917846] vm_area_dup+0x20/0x160 [ 38.918304] __split_vma+0x170/0x950 [ 38.918779] split_vma+0xc6/0x110 [ 38.919224] mprotect_fixup+0x8d2/0xb30 [ 38.919725] do_mprotect_pkey+0x87e/0xd40 [ 38.920245] __x64_sys_mprotect+0x78/0xc0 [ 38.920770] do_syscall_64+0x3f/0x90 [ 38.921238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921869] [ 38.922085] Freed by task 212: [ 38.922482] kasan_save_stack+0x22/0x50 [ 38.923005] kasan_set_track+0x25/0x30 [ 38.923486] kasan_save_free_info+0x2b/0x50 [ 38.924021] __kasan_slab_free+0x10a/0x190 [ 38.924561] kmem_cache_free+0x10d/0x4d0 [ 38.925081] rcu_core+0x8c8/0x2860 [ 38.925529] __do_softirq+0x1b7/0x7d4 [ 38.926009] [ 38.926223] Last potentially related work creation: [ 38.926821] kasan_save_stack+0x22/0x50 [ 38.927328] __kasan_record_aux_stack+0x8e/0xa0 [ 38.927910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.928557] remove_vma+0x139/0x170 [ 38.929015] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.929578] do_vmi_munmap+0x1f1/0x2b0 [ 38.930072] __vm_munmap+0x138/0x3a0 [ 38.930538] __x64_sys_munmap+0x59/0x80 [ 38.931054] do_syscall_64+0x3f/0x90 [ 38.931535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932178] [ 38.932397] Second to last potentially related work creation: [ 38.933096] kasan_save_stack+0x22/0x50 [ 38.933596] __kasan_record_aux_stack+0x8e/0xa0 [ 38.934176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.934828] remove_vma+0x139/0x170 [ 38.935285] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.935852] do_vmi_munmap+0x1f1/0x2b0 [ 38.936344] mmap_region+0x1f9/0x2660 [ 38.936821] do_mmap+0x854/0xf00 [ 38.937256] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.937749] ksys_mmap_pgoff+0x3af/0x500 [ 38.938252] do_syscall_64+0x3f/0x90 [ 38.938741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.939379] [ 38.939596] The buggy address belongs to the object at ffff88800eba1828 [ 38.939596] which belongs to the cache vm_area_struct of size 168 [ 38.941092] The buggy address is located 88 bytes inside of [ 38.941092] freed 168-byte region [ffff88800eba1828, ffff88800eba18d0) [ 38.942513] [ 38.942746] The buggy address belongs to the physical page: [ 38.943420] page:0000000004ccf435 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeba1 [ 38.944524] memcg:ffff88800dd6a501 [ 38.944956] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.945610] page_type: 0xffffffff() [ 38.946065] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b88c0 dead000000000002 [ 38.947000] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6a501 [ 38.947923] page dumped because: kasan: bad access detected [ 38.948599] [ 38.948818] Memory state around the buggy address: [ 38.949410] ffff88800eba1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.950281] ffff88800eba1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.951161] >ffff88800eba1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.952030] ^ [ 38.952448] ffff88800eba1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.953319] ffff88800eba1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.954185] ================================================================== [ 38.955190] Disabling lock debugging due to kernel taint [ 41.136439] BUG: Bad rss-counter state mm:000000000b630316 type:MM_FILEPAGES val:33 [ 41.137728] BUG: Bad rss-counter state mm:000000000b630316 type:MM_ANONPAGES val:22 [ 41.595560] BUG: Bad rss-counter state mm:000000009f34c694 type:MM_FILEPAGES val:33 [ 41.596476] BUG: Bad rss-counter state mm:000000009f34c694 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40556' (ECDSA) to the list of known hosts. 2023/06/20 11:03:34 fuzzer started 2023/06/20 11:03:34 dialing manager at localhost:36067 2023/06/20 11:03:34 checking machine... 2023/06/20 11:03:34 checking revisions... [ 42.311833] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:03:34 testing simple program... [ 42.345387] cgroup: Unknown subsys name 'net' [ 42.407189] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c13dc58 RCX=0000000000000000 RDX=ffff88800f4651c0 RSI=ffffffff818c70c9 RDI=ffff88800c13dc58 RBP=0000000000000003 RSP=ffff88801012f8d8 R8 =0000000000000006 R9 =0000000325559b1f R10=0000000325559b1f R11=0000000000000001 R12=ffff88806cc4aab0 R13=ffff88800c137608 R14=dffffc0000000000 R15=ffff88800c13dc58 RIP=ffffffff814c089b 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 00007ff00c946900 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=00007f458565d3e0 CR3=000000001ce2a000 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=00000000000000000000000000000000 XMM01=a391b720c20b755483421abea3127c0b XMM02=a100a4c7060147b567468887c04a1cd3 XMM03=fbc4f5604bd3f0301ccb15b59d9412d1 XMM04=2b8ef19722f7473d9a04ba63bb384dd7 XMM05=7a168c69677f8288639bd77d3a6e2c7d XMM06=8689ee414bde0701c0ebaf3f695f1967 XMM07=856a57676b4c5b3ef0c091872b5106ee XMM08=2790ef9465b2b66570d885de67082cfd XMM09=00000000000000040000000000000006 XMM10=f1ae70f3b593b355508c0132662801da XMM11=f6b565626617696be7722f5ac2ba5a70 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002d34e06 RSP=ffff8880169a7020 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800ceb15f0 RIP=ffffffff812d8b23 RFL=00000247 [---Z-PC] 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 00007fe95498e900 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=00007fe954953008 CR3=000000001a7dc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000