syzkaller login: [ 35.893898] BUG: Bad rss-counter state mm:000000009f8f679f type:MM_FILEPAGES val:33 [ 35.894963] BUG: Bad rss-counter state mm:000000009f8f679f type:MM_ANONPAGES val:22 [ 36.066664] ================================================================== [ 36.067614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.068572] Read of size 8 at addr ffff88800e48c798 by task sshd/219 [ 36.069357] [ 36.069582] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.070629] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.071624] Call Trace: [ 36.071944] [ 36.072227] dump_stack_lvl+0x91/0xf0 [ 36.072730] print_report+0xcc/0x620 [ 36.073218] ? __virt_addr_valid+0x102/0x340 [ 36.073781] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.074408] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.075021] kasan_report+0xbe/0xf0 [ 36.075512] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.076138] vma_interval_tree_remove+0xc75/0xec0 [ 36.076736] vma_prepare+0xc54/0x11a0 [ 36.077213] __split_vma+0x5af/0x950 [ 36.077684] ? __pfx___split_vma+0x10/0x10 [ 36.078206] ? find_held_lock+0x2c/0x110 [ 36.078722] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.079296] ? lock_is_held_type+0x9f/0x120 [ 36.079856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.080475] ? mtree_range_walk+0x632/0x900 [ 36.081026] ? mas_walk+0x5c7/0x7c0 [ 36.081502] do_vmi_munmap+0x1f1/0x2b0 [ 36.082006] mmap_region+0x1f9/0x2660 [ 36.082492] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.083007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.083746] ? __pfx_lock_acquire+0x10/0x10 [ 36.084289] ? __pfx_mmap_region+0x10/0x10 [ 36.084818] ? security_mmap_addr+0x7d/0xa0 [ 36.085351] ? get_unmapped_area+0x1f5/0x3f0 [ 36.085903] do_mmap+0x854/0xf00 [ 36.086349] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.086840] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.087408] ksys_mmap_pgoff+0x3af/0x500 [ 36.087928] do_syscall_64+0x3f/0x90 [ 36.088413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.089068] RIP: 0033:0x7f83a7d27d82 [ 36.089526] 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 [ 36.091670] RSP: 002b:00007ffd9d074c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.092583] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83a7d27d82 [ 36.093438] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83a7161000 [ 36.094286] RBP: 00007f83a7161000 R08: 0000000000000009 R09: 0000000000001000 [ 36.095159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acb4a4ef60 [ 36.096028] R13: 00007ffd9d074c80 R14: 00007ffd9d074cb0 R15: 00007ffd9d075010 [ 36.096926] [ 36.097227] [ 36.097444] Allocated by task 212: [ 36.097879] kasan_save_stack+0x22/0x50 [ 36.098388] kasan_set_track+0x25/0x30 [ 36.098897] __kasan_slab_alloc+0x59/0x70 [ 36.099421] kmem_cache_alloc+0x16b/0x370 [ 36.099958] vm_area_dup+0x20/0x160 [ 36.100419] __split_vma+0x170/0x950 [ 36.100892] split_vma+0xc6/0x110 [ 36.101340] mprotect_fixup+0x8d2/0xb30 [ 36.101848] do_mprotect_pkey+0x87e/0xd40 [ 36.102369] __x64_sys_mprotect+0x78/0xc0 [ 36.102894] do_syscall_64+0x3f/0x90 [ 36.103378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.104049] [ 36.104270] Freed by task 212: [ 36.104666] kasan_save_stack+0x22/0x50 [ 36.105171] kasan_set_track+0x25/0x30 [ 36.105667] kasan_save_free_info+0x2b/0x50 [ 36.106206] __kasan_slab_free+0x10a/0x190 [ 36.106746] kmem_cache_free+0x10d/0x4d0 [ 36.107263] rcu_core+0x8c8/0x2860 [ 36.107721] __do_softirq+0x1b7/0x7d4 [ 36.108211] [ 36.108433] Last potentially related work creation: [ 36.109025] kasan_save_stack+0x22/0x50 [ 36.109532] __kasan_record_aux_stack+0x8e/0xa0 [ 36.110112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.110752] remove_vma+0x139/0x170 [ 36.111308] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.111881] do_vmi_munmap+0x1f1/0x2b0 [ 36.112376] __vm_munmap+0x138/0x3a0 [ 36.112845] __x64_sys_munmap+0x59/0x80 [ 36.113344] do_syscall_64+0x3f/0x90 [ 36.113830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.114479] [ 36.114696] Second to last potentially related work creation: [ 36.115394] kasan_save_stack+0x22/0x50 [ 36.115912] __kasan_record_aux_stack+0x8e/0xa0 [ 36.116502] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.117156] remove_vma+0x139/0x170 [ 36.117615] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.118197] do_vmi_munmap+0x1f1/0x2b0 [ 36.118684] mmap_region+0x1f9/0x2660 [ 36.119173] do_mmap+0x854/0xf00 [ 36.119631] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.120121] ksys_mmap_pgoff+0x3af/0x500 [ 36.120629] do_syscall_64+0x3f/0x90 [ 36.121114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.121767] [ 36.121989] The buggy address belongs to the object at ffff88800e48c740 [ 36.121989] which belongs to the cache vm_area_struct of size 168 [ 36.123471] The buggy address is located 88 bytes inside of [ 36.123471] freed 168-byte region [ffff88800e48c740, ffff88800e48c7e8) [ 36.124915] [ 36.125134] The buggy address belongs to the physical page: [ 36.125810] page:00000000246b9966 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe48c [ 36.126916] memcg:ffff88800d892b01 [ 36.127345] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.128022] page_type: 0xffffffff() [ 36.128478] raw: 0100000000000200 ffff8880087a0c80 ffffea00003594c0 dead000000000002 [ 36.129406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d892b01 [ 36.130322] page dumped because: kasan: bad access detected [ 36.130991] [ 36.131213] Memory state around the buggy address: [ 36.131806] ffff88800e48c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.132671] ffff88800e48c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.133546] >ffff88800e48c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.134428] ^ [ 36.134934] ffff88800e48c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.135817] ffff88800e48c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.136683] ================================================================== [ 36.137758] Disabling lock debugging due to kernel taint [ 38.805760] BUG: Bad rss-counter state mm:00000000c44f1594 type:MM_FILEPAGES val:33 [ 38.806939] BUG: Bad rss-counter state mm:00000000c44f1594 type:MM_ANONPAGES val:22 [ 39.222814] BUG: Bad rss-counter state mm:00000000fc87404b type:MM_FILEPAGES val:33 [ 39.224233] BUG: Bad rss-counter state mm:00000000fc87404b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19192' (ECDSA) to the list of known hosts. 2023/06/20 22:26:04 fuzzer started 2023/06/20 22:26:04 dialing manager at localhost:36067 2023/06/20 22:26:04 checking machine... 2023/06/20 22:26:04 checking revisions... [ 39.923345] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:26:04 testing simple program... [ 39.960886] cgroup: Unknown subsys name 'net' [ 40.011637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000001f9 RCX=00007fe86e7b53ff RDX=0000000000000001 RSI=0000000000000001 RDI=0000000000001fa1 RBP=0000000000001fa1 RSP=00007fe86e32d6e0 R8 =0000000000000000 R9 =000055f822aa4e88 R10=0000000000000000 R11=0000000000000000 R12=00007fe868000020 R13=0000000000001fa0 R14=000055f82292aa50 R15=00007fe86e404840 RIP=00007fe86e74c31d 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 00007fe86e331700 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=00007f29807f1000 CR3=000000000dfa8000 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=36323a3232203032206e754a3e35333c XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343939 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801005d1c0 RSI=ffffffff83871c5a RDI=0000000000000005 RBP=ffff888008f65000 RSP=ffff88800fddfb10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=00000ba300000ba3 R12=ffff888008f65698 R13=ffff8880096d1140 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff814c0864 RFL=00000293 [--S-A-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 00007f55f9696900 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=00007ffcecb89000 CR3=000000001694e000 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