syzkaller login: [ 40.562166] BUG: Bad rss-counter state mm:000000009294e544 type:MM_FILEPAGES val:33 [ 40.563316] BUG: Bad rss-counter state mm:000000009294e544 type:MM_ANONPAGES val:22 [ 40.716810] ================================================================== [ 40.717672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.718536] Read of size 8 at addr ffff88800f587df0 by task sshd/221 [ 40.719259] [ 40.719467] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.720369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.721540] Call Trace: [ 40.721925] [ 40.722267] dump_stack_lvl+0x91/0xf0 [ 40.722857] print_report+0xcc/0x620 [ 40.723431] ? __virt_addr_valid+0x102/0x340 [ 40.724088] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.724827] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.725598] kasan_report+0xbe/0xf0 [ 40.726164] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.726906] vma_interval_tree_remove+0xc75/0xec0 [ 40.727636] vma_prepare+0xc54/0x11a0 [ 40.728212] __split_vma+0x5af/0x950 [ 40.728775] ? __pfx___split_vma+0x10/0x10 [ 40.729416] ? find_held_lock+0x2c/0x110 [ 40.730041] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.730715] ? lock_is_held_type+0x9f/0x120 [ 40.731364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.732081] ? mtree_range_walk+0x632/0x900 [ 40.732738] ? mas_walk+0x5c7/0x7c0 [ 40.733307] do_vmi_munmap+0x1f1/0x2b0 [ 40.733888] mmap_region+0x1f9/0x2660 [ 40.734467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.735076] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.735938] ? __pfx_lock_acquire+0x10/0x10 [ 40.736566] ? __pfx_mmap_region+0x10/0x10 [ 40.737220] ? security_mmap_addr+0x7d/0xa0 [ 40.737856] ? get_unmapped_area+0x1f5/0x3f0 [ 40.738519] do_mmap+0x854/0xf00 [ 40.739047] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.739638] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.740310] ksys_mmap_pgoff+0x3af/0x500 [ 40.740917] do_syscall_64+0x3f/0x90 [ 40.741499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.742274] RIP: 0033:0x7fed0d00dd82 [ 40.742822] 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 [ 40.745303] RSP: 002b:00007fff332a91b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.746175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed0d00dd82 [ 40.746970] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed0c447000 [ 40.747758] RBP: 00007fed0c447000 R08: 0000000000000009 R09: 0000000000001000 [ 40.748555] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dab295fec0 [ 40.749356] R13: 00007fff332a91d0 R14: 00007fff332a9200 R15: 00007fff332a9560 [ 40.750169] [ 40.750444] [ 40.750651] Allocated by task 213: [ 40.751051] kasan_save_stack+0x22/0x50 [ 40.751535] kasan_set_track+0x25/0x30 [ 40.751999] __kasan_slab_alloc+0x59/0x70 [ 40.752497] kmem_cache_alloc+0x16b/0x370 [ 40.753002] vm_area_dup+0x20/0x160 [ 40.753436] __split_vma+0x170/0x950 [ 40.753881] split_vma+0xc6/0x110 [ 40.754302] mprotect_fixup+0x8d2/0xb30 [ 40.754771] do_mprotect_pkey+0x87e/0xd40 [ 40.755260] __x64_sys_mprotect+0x78/0xc0 [ 40.755849] do_syscall_64+0x3f/0x90 [ 40.756384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.757122] [ 40.757365] Freed by task 19: [ 40.757795] kasan_save_stack+0x22/0x50 [ 40.758366] kasan_set_track+0x25/0x30 [ 40.758925] kasan_save_free_info+0x2b/0x50 [ 40.759525] __kasan_slab_free+0x10a/0x190 [ 40.760128] kmem_cache_free+0x10d/0x4d0 [ 40.760701] rcu_core+0x8c8/0x2860 [ 40.761209] __do_softirq+0x1b7/0x7d4 [ 40.761746] [ 40.761990] Last potentially related work creation: [ 40.762655] kasan_save_stack+0x22/0x50 [ 40.763223] __kasan_record_aux_stack+0x8e/0xa0 [ 40.763851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.764523] remove_vma+0x139/0x170 [ 40.765017] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.765604] do_vmi_munmap+0x1f1/0x2b0 [ 40.766119] __vm_munmap+0x138/0x3a0 [ 40.766616] __x64_sys_munmap+0x59/0x80 [ 40.767140] do_syscall_64+0x3f/0x90 [ 40.767638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.768316] [ 40.768546] The buggy address belongs to the object at ffff88800f587d98 [ 40.768546] which belongs to the cache vm_area_struct of size 168 [ 40.770088] The buggy address is located 88 bytes inside of [ 40.770088] freed 168-byte region [ffff88800f587d98, ffff88800f587e40) [ 40.771588] [ 40.771818] The buggy address belongs to the physical page: [ 40.772512] page:00000000ad560b5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf587 [ 40.773677] memcg:ffff88801a052a01 [ 40.774140] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.774847] page_type: 0xffffffff() [ 40.775338] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.776341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a052a01 [ 40.777353] page dumped because: kasan: bad access detected [ 40.778088] [ 40.778326] Memory state around the buggy address: [ 40.778957] ffff88800f587c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 40.779893] ffff88800f587d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 40.780819] >ffff88800f587d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.781741] ^ [ 40.782620] ffff88800f587e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.783559] ffff88800f587e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.784483] ================================================================== [ 40.785576] Disabling lock debugging due to kernel taint [ 42.608866] BUG: Bad rss-counter state mm:000000000994f10c type:MM_FILEPAGES val:33 [ 42.610076] BUG: Bad rss-counter state mm:000000000994f10c type:MM_ANONPAGES val:22 [ 43.059346] BUG: Bad rss-counter state mm:00000000e28e5538 type:MM_FILEPAGES val:33 [ 43.060369] BUG: Bad rss-counter state mm:00000000e28e5538 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6861' (ECDSA) to the list of known hosts. 2023/06/20 01:08:49 fuzzer started 2023/06/20 01:08:50 dialing manager at localhost:44161 2023/06/20 01:08:50 checking machine... 2023/06/20 01:08:50 checking revisions... [ 43.828845] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:08:50 testing simple program... [ 43.871753] cgroup: Unknown subsys name 'net' [ 43.931898] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:08:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880143bf7a0 RCX=0000000000000001 RDX=1ffff11002877eff RSI=ffff8880143bfae8 RDI=ffffffff818a83a8 RBP=ffff8880143bf7f8 RSP=ffff8880143bf788 R8 =0000000000000001 R9 =ffff8880143bf7e0 R10=0000000000038001 R11=00000000000229c7 R12=ffff8880143bf868 R13=0000000000000000 R14=ffff88800d643680 R15=ffff888006accbe0 RIP=ffffffff811303b2 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 00007f1e1ed9e900 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=00007fa4faeb0650 CR3=000000000d614000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bfe0e0171fbbc04400000000000ae988 XMM05=99b94518cafcea4200000000001357d8 XMM06=c291bd5c70af25b900000000001345c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002e49f7f RBX=0000000000000005 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801724fbf8 RBP=dffffc0000000000 RSP=ffff88801724fb40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000008 R13=0000000000000000 R14=ffff88801724fbd0 R15=ffff88800c434280 RIP=ffffffff813ad5ca 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 00007fa4fa8fb900 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=00007fa4faeb2618 CR3=000000000e056000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000