syzkaller login: [ 60.347504] BUG: Bad rss-counter state mm:000000007eef2d62 type:MM_FILEPAGES val:33 [ 60.349380] BUG: Bad rss-counter state mm:000000007eef2d62 type:MM_ANONPAGES val:22 [ 60.531594] ================================================================== [ 60.532647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.533743] Read of size 8 at addr ffff888015bcea50 by task sshd/226 [ 60.534739] [ 60.534998] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.536022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.537164] Call Trace: [ 60.537535] [ 60.537867] dump_stack_lvl+0x91/0xf0 [ 60.538444] print_report+0xcc/0x620 [ 60.538995] ? __virt_addr_valid+0x102/0x340 [ 60.539654] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.540352] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.541060] kasan_report+0xbe/0xf0 [ 60.541597] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.542307] vma_interval_tree_remove+0xc75/0xec0 [ 60.542999] vma_prepare+0xc54/0x11a0 [ 60.543576] __split_vma+0x5af/0x950 [ 60.544106] ? __pfx___split_vma+0x10/0x10 [ 60.544708] ? find_held_lock+0x2c/0x110 [ 60.545307] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.545964] ? lock_is_held_type+0x9f/0x120 [ 60.546593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.547297] ? mtree_range_walk+0x632/0x900 [ 60.547940] ? mas_walk+0x5c7/0x7c0 [ 60.548493] do_vmi_munmap+0x1f1/0x2b0 [ 60.549071] mmap_region+0x1f9/0x2660 [ 60.549635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.550215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.551043] ? __pfx_lock_acquire+0x10/0x10 [ 60.551675] ? __pfx_mmap_region+0x10/0x10 [ 60.552293] ? security_mmap_addr+0x7d/0xa0 [ 60.552916] ? get_unmapped_area+0x1f5/0x3f0 [ 60.553557] do_mmap+0x854/0xf00 [ 60.554075] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.554630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.555262] ksys_mmap_pgoff+0x3af/0x500 [ 60.555871] do_syscall_64+0x3f/0x90 [ 60.556427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.557188] RIP: 0033:0x7fbb0ddacd82 [ 60.557720] 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 [ 60.560176] RSP: 002b:00007ffca2c87ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.561230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb0ddacd82 [ 60.562232] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb0d1e6000 [ 60.563194] RBP: 00007fbb0d1e6000 R08: 0000000000000009 R09: 0000000000001000 [ 60.564099] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b16382ab20 [ 60.564987] R13: 00007ffca2c87f10 R14: 00007ffca2c87f40 R15: 00007ffca2c882a0 [ 60.565943] [ 60.566286] [ 60.566516] Allocated by task 219: [ 60.566973] kasan_save_stack+0x22/0x50 [ 60.567551] kasan_set_track+0x25/0x30 [ 60.568135] __kasan_slab_alloc+0x59/0x70 [ 60.568775] kmem_cache_alloc+0x16b/0x370 [ 60.569376] vm_area_dup+0x20/0x160 [ 60.569889] __split_vma+0x170/0x950 [ 60.570426] split_vma+0xc6/0x110 [ 60.570905] mprotect_fixup+0x8d2/0xb30 [ 60.571489] do_mprotect_pkey+0x87e/0xd40 [ 60.572073] __x64_sys_mprotect+0x78/0xc0 [ 60.572661] do_syscall_64+0x3f/0x90 [ 60.573201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.573899] [ 60.574156] Freed by task 219: [ 60.574597] kasan_save_stack+0x22/0x50 [ 60.575202] kasan_set_track+0x25/0x30 [ 60.575766] kasan_save_free_info+0x2b/0x50 [ 60.576375] __kasan_slab_free+0x10a/0x190 [ 60.576959] kmem_cache_free+0x10d/0x4d0 [ 60.577549] rcu_core+0x8c8/0x2860 [ 60.578047] __do_softirq+0x1b7/0x7d4 [ 60.578588] [ 60.578828] Last potentially related work creation: [ 60.579517] kasan_save_stack+0x22/0x50 [ 60.580091] __kasan_record_aux_stack+0x8e/0xa0 [ 60.580730] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.581455] remove_vma+0x139/0x170 [ 60.581960] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.582597] do_vmi_munmap+0x1f1/0x2b0 [ 60.583176] __vm_munmap+0x138/0x3a0 [ 60.583698] __x64_sys_munmap+0x59/0x80 [ 60.584267] do_syscall_64+0x3f/0x90 [ 60.584800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.585524] [ 60.585763] The buggy address belongs to the object at ffff888015bce9f8 [ 60.585763] which belongs to the cache vm_area_struct of size 168 [ 60.587448] The buggy address is located 88 bytes inside of [ 60.587448] freed 168-byte region [ffff888015bce9f8, ffff888015bceaa0) [ 60.589058] [ 60.589301] The buggy address belongs to the physical page: [ 60.590035] page:0000000051b54dae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15bce [ 60.591294] memcg:ffff8880159f5201 [ 60.591764] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.592509] page_type: 0xffffffff() [ 60.593003] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.594058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159f5201 [ 60.595073] page dumped because: kasan: bad access detected [ 60.595826] [ 60.596078] Memory state around the buggy address: [ 60.596714] ffff888015bce900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.597687] ffff888015bce980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 60.598651] >ffff888015bcea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.599634] ^ [ 60.600453] ffff888015bcea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 60.601422] ffff888015bceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.602381] ================================================================== [ 60.603509] Disabling lock debugging due to kernel taint [ 62.662700] BUG: Bad rss-counter state mm:00000000ce451a60 type:MM_FILEPAGES val:33 [ 62.663857] BUG: Bad rss-counter state mm:00000000ce451a60 type:MM_ANONPAGES val:22 [ 63.162103] BUG: Bad rss-counter state mm:0000000091bb6ce5 type:MM_FILEPAGES val:33 [ 63.163311] BUG: Bad rss-counter state mm:0000000091bb6ce5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24714' (ECDSA) to the list of known hosts. 2023/06/19 15:33:17 fuzzer started 2023/06/19 15:33:17 dialing manager at localhost:44161 2023/06/19 15:33:17 checking machine... 2023/06/19 15:33:17 checking revisions... [ 63.838516] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:33:17 testing simple program... [ 63.885481] cgroup: Unknown subsys name 'net' [ 63.920449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f61b5627000 CR3=0000000016872000 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=2036313a33333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c522 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800e4c7601 RSI=ffff88800e4c7650 RDI=ffff88800e4c7650 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff860d68fa R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800e4c7658 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fbc71e5a900 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=00007ffc8024c000 CR3=000000000d4f4000 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=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