syzkaller login: [ 35.607607] BUG: Bad rss-counter state mm:000000008f2cac24 type:MM_FILEPAGES val:33 [ 35.609106] BUG: Bad rss-counter state mm:000000008f2cac24 type:MM_ANONPAGES val:22 [ 35.767191] ================================================================== [ 35.768118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.769059] Read of size 8 at addr ffff888018346ed8 by task sshd/219 [ 35.769835] [ 35.770052] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.771113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.772091] Call Trace: [ 35.772414] [ 35.772699] dump_stack_lvl+0x91/0xf0 [ 35.773196] print_report+0xcc/0x620 [ 35.773680] ? __virt_addr_valid+0x102/0x340 [ 35.774237] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.774866] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.775496] kasan_report+0xbe/0xf0 [ 35.775969] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.776591] vma_interval_tree_remove+0xc75/0xec0 [ 35.777205] vma_prepare+0xc54/0x11a0 [ 35.777687] __split_vma+0x5af/0x950 [ 35.778164] ? __pfx___split_vma+0x10/0x10 [ 35.778694] ? find_held_lock+0x2c/0x110 [ 35.779235] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.779810] ? lock_is_held_type+0x9f/0x120 [ 35.780366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.780982] ? mtree_range_walk+0x632/0x900 [ 35.781538] ? mas_walk+0x5c7/0x7c0 [ 35.782017] do_vmi_munmap+0x1f1/0x2b0 [ 35.782515] mmap_region+0x1f9/0x2660 [ 35.783001] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.783525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.784245] ? __pfx_lock_acquire+0x10/0x10 [ 35.784782] ? __pfx_mmap_region+0x10/0x10 [ 35.785321] ? security_mmap_addr+0x7d/0xa0 [ 35.785849] ? get_unmapped_area+0x1f5/0x3f0 [ 35.786407] do_mmap+0x854/0xf00 [ 35.786851] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.787368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.787936] ksys_mmap_pgoff+0x3af/0x500 [ 35.788455] do_syscall_64+0x3f/0x90 [ 35.788941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.789587] RIP: 0033:0x7fe833718d82 [ 35.790049] 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 [ 35.792215] RSP: 002b:00007ffd1a7257c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.793131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe833718d82 [ 35.793992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe832b52000 [ 35.794854] RBP: 00007fe832b52000 R08: 0000000000000009 R09: 0000000000001000 [ 35.795712] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ea1689ec0 [ 35.796575] R13: 00007ffd1a7257e0 R14: 00007ffd1a725810 R15: 00007ffd1a725b70 [ 35.797454] [ 35.797749] [ 35.797966] Allocated by task 212: [ 35.798402] kasan_save_stack+0x22/0x50 [ 35.798919] kasan_set_track+0x25/0x30 [ 35.799428] __kasan_slab_alloc+0x59/0x70 [ 35.799954] kmem_cache_alloc+0x16b/0x370 [ 35.800476] vm_area_dup+0x20/0x160 [ 35.800940] __split_vma+0x170/0x950 [ 35.801416] split_vma+0xc6/0x110 [ 35.801855] mprotect_fixup+0x8d2/0xb30 [ 35.802367] do_mprotect_pkey+0x87e/0xd40 [ 35.802895] __x64_sys_mprotect+0x78/0xc0 [ 35.803424] do_syscall_64+0x3f/0x90 [ 35.803905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.804554] [ 35.804770] Freed by task 212: [ 35.805170] kasan_save_stack+0x22/0x50 [ 35.805676] kasan_set_track+0x25/0x30 [ 35.806175] kasan_save_free_info+0x2b/0x50 [ 35.806711] __kasan_slab_free+0x10a/0x190 [ 35.807264] kmem_cache_free+0x10d/0x4d0 [ 35.807775] rcu_core+0x8c8/0x2860 [ 35.808225] __do_softirq+0x1b7/0x7d4 [ 35.808706] [ 35.808924] Last potentially related work creation: [ 35.809516] kasan_save_stack+0x22/0x50 [ 35.810030] __kasan_record_aux_stack+0x8e/0xa0 [ 35.810608] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.811268] remove_vma+0x139/0x170 [ 35.811727] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.812294] do_vmi_munmap+0x1f1/0x2b0 [ 35.812782] __vm_munmap+0x138/0x3a0 [ 35.813259] __x64_sys_munmap+0x59/0x80 [ 35.813760] do_syscall_64+0x3f/0x90 [ 35.814234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.814885] [ 35.815129] The buggy address belongs to the object at ffff888018346e80 [ 35.815129] which belongs to the cache vm_area_struct of size 168 [ 35.816626] The buggy address is located 88 bytes inside of [ 35.816626] freed 168-byte region [ffff888018346e80, ffff888018346f28) [ 35.818056] [ 35.818272] The buggy address belongs to the physical page: [ 35.818946] page:00000000f454cc95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18346 [ 35.820045] memcg:ffff888016f48401 [ 35.820473] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.821176] page_type: 0xffffffff() [ 35.821623] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 35.822553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f48401 [ 35.823476] page dumped because: kasan: bad access detected [ 35.824139] [ 35.824358] Memory state around the buggy address: [ 35.824937] ffff888018346d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.825792] ffff888018346e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.826652] >ffff888018346e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.827515] ^ [ 35.828238] ffff888018346f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.829104] ffff888018346f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.829955] ================================================================== [ 35.831149] Disabling lock debugging due to kernel taint [ 37.561309] BUG: Bad rss-counter state mm:0000000058722f19 type:MM_FILEPAGES val:33 [ 37.562481] BUG: Bad rss-counter state mm:0000000058722f19 type:MM_ANONPAGES val:22 [ 38.039674] BUG: Bad rss-counter state mm:00000000b36c2e04 type:MM_FILEPAGES val:33 [ 38.040851] BUG: Bad rss-counter state mm:00000000b36c2e04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32157' (ECDSA) to the list of known hosts. 2023/06/20 18:59:29 fuzzer started 2023/06/20 18:59:30 dialing manager at localhost:36067 2023/06/20 18:59:30 checking machine... 2023/06/20 18:59:30 checking revisions... [ 38.628160] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:59:30 testing simple program... [ 38.678190] cgroup: Unknown subsys name 'net' [ 38.714153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:59:29 Registers: info registers vcpu 0 RAX=ffff888019cc0001 RBX=ffff888019cbf388 RCX=0000000000000001 RDX=ffff888019cbf901 RSI=ffff888019cbf9b8 RDI=ffff888019cbf398 RBP=ffff888019cbf9b8 RSP=ffff888019cbf2e0 R8 =ffffffff863dde82 R9 =ffff888019cbf3c8 R10=0000000000038001 R11=0000000000091ae9 R12=0000000000000008 R13=ffff888019cb8000 R14=ffff888019cbf9c0 R15=ffff888019cbf388 RIP=ffffffff8113048d RFL=00000283 [--S---C] 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 00007f230537b900 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=00007fffe8ba9000 CR3=00000000095d8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815345ff RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff845121c4 RSP=ffff888008e07da8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000f5257d14 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534618 RFL=00000002 [-------] 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=00007feb111efa50 CR3=000000000f396000 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=181c2a1267b80a81774cafe8736c8b97 XMM02=000000000011b718eff9b2d0a8fce9cb XMM03=000000000011b7e82c67c8bc2e329bc3 XMM04=0868391e19da686b00000000000ae988 XMM05=dfcdbad4f1609c3700000000001320b0 XMM06=3832167ab9390dd80000000000131288 XMM07=e042d86d42eb936e0000000000122808 XMM08=2f40856b49abf94b000000000011b7e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000