syzkaller login: [ 42.820056] BUG: Bad rss-counter state mm:000000001cdaf55b type:MM_FILEPAGES val:33 [ 42.820796] BUG: Bad rss-counter state mm:000000001cdaf55b type:MM_ANONPAGES val:22 [ 42.849922] ================================================================== [ 42.850513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.851231] Read of size 8 at addr ffff8880168f3798 by task sshd/222 [ 42.851733] [ 42.851871] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.852431] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.853099] Call Trace: [ 42.853408] [ 42.853620] dump_stack_lvl+0x91/0xf0 [ 42.853982] print_report+0xcc/0x620 [ 42.854289] ? __virt_addr_valid+0x102/0x340 [ 42.854637] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.855027] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.855415] kasan_report+0xbe/0xf0 [ 42.855734] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.856166] vma_interval_tree_remove+0xc75/0xec0 [ 42.856548] vma_prepare+0xc54/0x11a0 [ 42.856876] __split_vma+0x5af/0x950 [ 42.857177] ? __pfx___split_vma+0x10/0x10 [ 42.857512] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.857922] ? __pfx___lock_acquire+0x10/0x10 [ 42.858276] ? lock_is_held_type+0x9f/0x120 [ 42.858615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.859007] ? mtree_range_walk+0x632/0x900 [ 42.859345] ? mas_walk+0x5c7/0x7c0 [ 42.859639] do_vmi_munmap+0x1f1/0x2b0 [ 42.859947] mmap_region+0x1f9/0x2660 [ 42.860246] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.860561] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.861042] ? __pfx_lock_acquire+0x10/0x10 [ 42.861407] ? __pfx_mmap_region+0x10/0x10 [ 42.861826] ? security_mmap_addr+0x7d/0xa0 [ 42.862197] ? get_unmapped_area+0x1f5/0x3f0 [ 42.862538] do_mmap+0x854/0xf00 [ 42.862836] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.863140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.863485] ksys_mmap_pgoff+0x3af/0x500 [ 42.863802] do_syscall_64+0x3f/0x90 [ 42.864106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.864515] RIP: 0033:0x7fb68f5c2d82 [ 42.864809] 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 [ 42.866231] RSP: 002b:00007fffa16cbd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.866807] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb68f5c2d82 [ 42.867347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb68e9fc000 [ 42.867888] RBP: 00007fb68e9fc000 R08: 0000000000000009 R09: 0000000000001000 [ 42.868421] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640babbaec0 [ 42.868963] R13: 00007fffa16cbd20 R14: 00007fffa16cbd50 R15: 00007fffa16cc0b0 [ 42.869509] [ 42.869718] [ 42.869857] Allocated by task 215: [ 42.870127] kasan_save_stack+0x22/0x50 [ 42.870458] kasan_set_track+0x25/0x30 [ 42.870774] __kasan_slab_alloc+0x59/0x70 [ 42.871118] kmem_cache_alloc+0x16b/0x370 [ 42.871444] vm_area_dup+0x20/0x160 [ 42.871734] __split_vma+0x170/0x950 [ 42.872027] split_vma+0xc6/0x110 [ 42.872307] mprotect_fixup+0x8d2/0xb30 [ 42.872629] do_mprotect_pkey+0x87e/0xd40 [ 42.872965] __x64_sys_mprotect+0x78/0xc0 [ 42.873293] do_syscall_64+0x3f/0x90 [ 42.873593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.874035] [ 42.874182] Freed by task 215: [ 42.874438] kasan_save_stack+0x22/0x50 [ 42.874765] kasan_set_track+0x25/0x30 [ 42.875080] kasan_save_free_info+0x2b/0x50 [ 42.875419] __kasan_slab_free+0x10a/0x190 [ 42.875761] kmem_cache_free+0x10d/0x4d0 [ 42.876080] rcu_core+0x8c8/0x2860 [ 42.876364] __do_softirq+0x1b7/0x7d4 [ 42.876668] [ 42.876804] Last potentially related work creation: [ 42.877184] kasan_save_stack+0x22/0x50 [ 42.877506] __kasan_record_aux_stack+0x8e/0xa0 [ 42.877944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.878370] remove_vma+0x139/0x170 [ 42.878650] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.878999] do_vmi_munmap+0x1f1/0x2b0 [ 42.879295] __vm_munmap+0x138/0x3a0 [ 42.879584] __x64_sys_munmap+0x59/0x80 [ 42.879917] do_syscall_64+0x3f/0x90 [ 42.880242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.880681] [ 42.880831] The buggy address belongs to the object at ffff8880168f3740 [ 42.880831] which belongs to the cache vm_area_struct of size 168 [ 42.881791] The buggy address is located 88 bytes inside of [ 42.881791] freed 168-byte region [ffff8880168f3740, ffff8880168f37e8) [ 42.882699] [ 42.882847] The buggy address belongs to the physical page: [ 42.883303] page:0000000082d11ad2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168f3 [ 42.884047] memcg:ffff88800991c901 [ 42.884336] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.884770] page_type: 0xffffffff() [ 42.885085] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.885765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800991c901 [ 42.886361] page dumped because: kasan: bad access detected [ 42.886790] [ 42.886924] Memory state around the buggy address: [ 42.887282] ffff8880168f3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.887853] ffff8880168f3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.888449] >ffff8880168f3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.889037] ^ [ 42.889374] ffff8880168f3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.889988] ffff8880168f3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.890556] ================================================================== [ 42.891501] Disabling lock debugging due to kernel taint [ 44.522089] BUG: Bad rss-counter state mm:000000009930b5b0 type:MM_FILEPAGES val:33 [ 44.522724] BUG: Bad rss-counter state mm:000000009930b5b0 type:MM_ANONPAGES val:22 [ 44.948333] BUG: Bad rss-counter state mm:0000000054b0d4ca type:MM_FILEPAGES val:33 [ 44.949058] BUG: Bad rss-counter state mm:0000000054b0d4ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7282' (ECDSA) to the list of known hosts. 2023/06/20 09:43:53 fuzzer started 2023/06/20 09:43:53 dialing manager at localhost:44161 2023/06/20 09:43:53 checking machine... 2023/06/20 09:43:53 checking revisions... [ 45.510205] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:43:53 testing simple program... [ 45.555878] cgroup: Unknown subsys name 'net' [ 45.587221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:41 Registers: info registers vcpu 0 RAX=000055ffe510beb1 RBX=000055ffe510beb0 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f23d77d43c0 RDI=000055ffe510bea0 RBP=0000000000000044 RSP=00007ffc3dd25170 R8 =000055ffe5139293 R9 =00007f23d7820be0 R10=0000000000000100 R11=0000000000000246 R12=000055ffe5129ed0 R13=00007ffc3dd25178 R14=00007f23d7249b22 R15=00007f23d726e710 RIP=00007f23d7d9b3c2 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f23d726e900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc3dd1f000 CR3=0000000013656000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7265742065687420736e776f20686369 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100d9e135c RBX=ffffffff813ad420 RCX=ffff88806cf09b38 RDX=ffff88806cf0a000 RSI=ffff88806cf09b30 RDI=ffff88806cf09aa8 RBP=dffffc0000000000 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffed100d9e1355 R13=ffffed100d9e1354 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff81132d37 RFL=00000296 [--S-AP-] 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=00007f45ec8f2b80 CR3=000000000e546000 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=3d60b47dda9560a9644890de7a3849bd XMM02=000000000011d460ec2efd57dc4c00df XMM03=0000000000124900aad88ed7fc5258c3 XMM04=73a5604466a4374d00000000000ae988 XMM05=59d5b690e0af863b0000000000134490 XMM06=2e5c55ef46e839be00000000001332f8 XMM07=e042d86d42eb936e0000000000124b80 XMM08=aad88ed7fc5258c3000000000011d4c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000