syzkaller login: [ 31.090954] BUG: Bad rss-counter state mm:000000000120f582 type:MM_FILEPAGES val:33 [ 31.092436] BUG: Bad rss-counter state mm:000000000120f582 type:MM_ANONPAGES val:22 [ 31.251096] ================================================================== [ 31.252025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.252989] Read of size 8 at addr ffff88800c9a3ed8 by task sshd/220 [ 31.253792] [ 31.254014] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.255013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.256022] Call Trace: [ 31.256368] [ 31.256657] dump_stack_lvl+0x91/0xf0 [ 31.257158] print_report+0xcc/0x620 [ 31.257673] ? __virt_addr_valid+0x102/0x340 [ 31.258240] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258869] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259495] kasan_report+0xbe/0xf0 [ 31.259974] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260602] vma_interval_tree_remove+0xc75/0xec0 [ 31.261206] vma_prepare+0xc54/0x11a0 [ 31.261697] __split_vma+0x5af/0x950 [ 31.262173] ? __pfx___split_vma+0x10/0x10 [ 31.262706] ? find_held_lock+0x2c/0x110 [ 31.263224] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.263791] ? lock_is_held_type+0x9f/0x120 [ 31.264327] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.264937] ? mtree_range_walk+0x632/0x900 [ 31.265516] ? mas_walk+0x5c7/0x7c0 [ 31.265998] do_vmi_munmap+0x1f1/0x2b0 [ 31.266497] mmap_region+0x1f9/0x2660 [ 31.266990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.267511] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.268234] ? __pfx_lock_acquire+0x10/0x10 [ 31.268767] ? __pfx_mmap_region+0x10/0x10 [ 31.269312] ? security_mmap_addr+0x7d/0xa0 [ 31.269867] ? get_unmapped_area+0x1f5/0x3f0 [ 31.270425] do_mmap+0x854/0xf00 [ 31.270865] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.271395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.271969] ksys_mmap_pgoff+0x3af/0x500 [ 31.272482] do_syscall_64+0x3f/0x90 [ 31.272974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273634] RIP: 0033:0x7fc043751d82 [ 31.274092] 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 [ 31.276204] RSP: 002b:00007ffcdf80bce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.277109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc043751d82 [ 31.277984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc042b8b000 [ 31.278826] RBP: 00007fc042b8b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.279672] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e60216f70 [ 31.280524] R13: 00007ffcdf80bd00 R14: 00007ffcdf80bd30 R15: 00007ffcdf80c090 [ 31.281399] [ 31.281701] [ 31.281915] Allocated by task 213: [ 31.282347] kasan_save_stack+0x22/0x50 [ 31.282858] kasan_set_track+0x25/0x30 [ 31.283348] __kasan_slab_alloc+0x59/0x70 [ 31.283872] kmem_cache_alloc+0x16b/0x370 [ 31.284399] vm_area_dup+0x20/0x160 [ 31.284856] __split_vma+0x170/0x950 [ 31.285339] split_vma+0xc6/0x110 [ 31.285799] mprotect_fixup+0x8d2/0xb30 [ 31.286303] do_mprotect_pkey+0x87e/0xd40 [ 31.286829] __x64_sys_mprotect+0x78/0xc0 [ 31.287354] do_syscall_64+0x3f/0x90 [ 31.287837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288480] [ 31.288696] Freed by task 213: [ 31.289094] kasan_save_stack+0x22/0x50 [ 31.289617] kasan_set_track+0x25/0x30 [ 31.290122] kasan_save_free_info+0x2b/0x50 [ 31.290659] __kasan_slab_free+0x10a/0x190 [ 31.291200] kmem_cache_free+0x10d/0x4d0 [ 31.291715] rcu_core+0x8c8/0x2860 [ 31.292173] __do_softirq+0x1b7/0x7d4 [ 31.292663] [ 31.292882] Last potentially related work creation: [ 31.293472] kasan_save_stack+0x22/0x50 [ 31.293974] __kasan_record_aux_stack+0x8e/0xa0 [ 31.294558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.295200] remove_vma+0x139/0x170 [ 31.295664] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.296244] do_vmi_munmap+0x1f1/0x2b0 [ 31.296780] __vm_munmap+0x138/0x3a0 [ 31.297251] __x64_sys_munmap+0x59/0x80 [ 31.297778] do_syscall_64+0x3f/0x90 [ 31.298263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298922] [ 31.299140] The buggy address belongs to the object at ffff88800c9a3e80 [ 31.299140] which belongs to the cache vm_area_struct of size 168 [ 31.300625] The buggy address is located 88 bytes inside of [ 31.300625] freed 168-byte region [ffff88800c9a3e80, ffff88800c9a3f28) [ 31.302112] [ 31.302333] The buggy address belongs to the physical page: [ 31.303034] page:000000007e986500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9a3 [ 31.304123] memcg:ffff88800dd4d401 [ 31.304544] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.305188] page_type: 0xffffffff() [ 31.305649] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.306576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd4d401 [ 31.307552] page dumped because: kasan: bad access detected [ 31.308257] [ 31.308475] Memory state around the buggy address: [ 31.309077] ffff88800c9a3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.309961] ffff88800c9a3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.310828] >ffff88800c9a3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.311685] ^ [ 31.312450] ffff88800c9a3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.313303] ffff88800c9a3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.314163] ================================================================== [ 31.315152] Disabling lock debugging due to kernel taint [ 33.306632] BUG: Bad rss-counter state mm:000000000128240a type:MM_FILEPAGES val:33 [ 33.307204] BUG: Bad rss-counter state mm:000000000128240a type:MM_ANONPAGES val:22 [ 33.741744] BUG: Bad rss-counter state mm:000000009fd0e128 type:MM_FILEPAGES val:33 [ 33.742944] BUG: Bad rss-counter state mm:000000009fd0e128 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46168' (ECDSA) to the list of known hosts. 2023/06/19 16:11:11 fuzzer started 2023/06/19 16:11:12 dialing manager at localhost:44161 2023/06/19 16:11:12 checking machine... 2023/06/19 16:11:12 checking revisions... [ 34.465334] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:11:12 testing simple program... [ 34.513593] cgroup: Unknown subsys name 'net' [ 34.560618] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:11:11 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85e0af54 RCX=ffffffff818dfeb7 RDX=0000000000000000 RSI=ffffffff8614cd06 RDI=ffffffff85e0af50 RBP=ffffffff85e0af50 RSP=ffff88806ce099b8 R8 =ffffffff8614cd06 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000246df R12=ffffffff85e0af58 R13=ffffffff85e0af50 R14=ffffffff85e0af50 R15=dffffc0000000000 RIP=ffffffff8112fc8c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0075003900 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=00007f0074452bc0 CR3=000000000cbac000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=438e3696e9d3c02b00000000000ae988 XMM05=b53f3055eaf1224800000000001357b0 XMM06=4fda316b135da52b0000000000134230 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdd20506f8 CR3=000000000dbc4000 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=2031313a31313a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a31313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000