syzkaller login: [ 63.142134] BUG: Bad rss-counter state mm:000000001ef18cff type:MM_FILEPAGES val:33 [ 63.143392] BUG: Bad rss-counter state mm:000000001ef18cff type:MM_ANONPAGES val:22 [ 63.309532] ================================================================== [ 63.310476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.311460] Read of size 8 at addr ffff88800c4fc310 by task sshd/221 [ 63.312368] [ 63.312594] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.313678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.314696] Call Trace: [ 63.315025] [ 63.315321] dump_stack_lvl+0x91/0xf0 [ 63.315823] print_report+0xcc/0x620 [ 63.316340] ? __virt_addr_valid+0x102/0x340 [ 63.316888] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.317506] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.318092] kasan_report+0xbe/0xf0 [ 63.318561] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.319150] vma_interval_tree_remove+0xc75/0xec0 [ 63.319738] vma_prepare+0xc54/0x11a0 [ 63.320196] __split_vma+0x5af/0x950 [ 63.320680] ? __pfx___split_vma+0x10/0x10 [ 63.321191] ? find_held_lock+0x2c/0x110 [ 63.321711] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.322267] ? lock_is_held_type+0x9f/0x120 [ 63.322849] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.323452] ? mtree_range_walk+0x632/0x900 [ 63.323971] ? mas_walk+0x5c7/0x7c0 [ 63.324452] do_vmi_munmap+0x1f1/0x2b0 [ 63.324927] mmap_region+0x1f9/0x2660 [ 63.325439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.325955] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.326725] ? __pfx_lock_acquire+0x10/0x10 [ 63.327259] ? __pfx_mmap_region+0x10/0x10 [ 63.327812] ? security_mmap_addr+0x7d/0xa0 [ 63.328369] ? get_unmapped_area+0x1f5/0x3f0 [ 63.328929] do_mmap+0x854/0xf00 [ 63.329403] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.329905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.330524] ksys_mmap_pgoff+0x3af/0x500 [ 63.331180] do_syscall_64+0x3f/0x90 [ 63.331797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.332625] RIP: 0033:0x7fb622427d82 [ 63.333210] 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 [ 63.335861] RSP: 002b:00007ffd39ce1008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.336794] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb622427d82 [ 63.337683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb621861000 [ 63.338539] RBP: 00007fb621861000 R08: 0000000000000009 R09: 0000000000001000 [ 63.339417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce98b71f70 [ 63.340258] R13: 00007ffd39ce1020 R14: 00007ffd39ce1050 R15: 00007ffd39ce13b0 [ 63.341141] [ 63.341462] [ 63.341678] Allocated by task 214: [ 63.342108] kasan_save_stack+0x22/0x50 [ 63.342629] kasan_set_track+0x25/0x30 [ 63.343127] __kasan_slab_alloc+0x59/0x70 [ 63.343669] kmem_cache_alloc+0x16b/0x370 [ 63.344188] vm_area_dup+0x20/0x160 [ 63.344687] __split_vma+0x170/0x950 [ 63.345157] split_vma+0xc6/0x110 [ 63.345654] mprotect_fixup+0x8d2/0xb30 [ 63.346167] do_mprotect_pkey+0x87e/0xd40 [ 63.346807] __x64_sys_mprotect+0x78/0xc0 [ 63.347438] do_syscall_64+0x3f/0x90 [ 63.347915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.348574] [ 63.348795] Freed by task 214: [ 63.349187] kasan_save_stack+0x22/0x50 [ 63.349727] kasan_set_track+0x25/0x30 [ 63.350226] kasan_save_free_info+0x2b/0x50 [ 63.350773] __kasan_slab_free+0x10a/0x190 [ 63.351322] kmem_cache_free+0x10d/0x4d0 [ 63.351833] rcu_core+0x8c8/0x2860 [ 63.352279] __do_softirq+0x1b7/0x7d4 [ 63.352777] [ 63.352990] Last potentially related work creation: [ 63.353629] kasan_save_stack+0x22/0x50 [ 63.354142] __kasan_record_aux_stack+0x8e/0xa0 [ 63.354729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.355385] remove_vma+0x139/0x170 [ 63.355838] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.356410] do_vmi_munmap+0x1f1/0x2b0 [ 63.356896] __vm_munmap+0x138/0x3a0 [ 63.357393] __x64_sys_munmap+0x59/0x80 [ 63.357896] do_syscall_64+0x3f/0x90 [ 63.358384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.359032] [ 63.359245] The buggy address belongs to the object at ffff88800c4fc2b8 [ 63.359245] which belongs to the cache vm_area_struct of size 168 [ 63.360740] The buggy address is located 88 bytes inside of [ 63.360740] freed 168-byte region [ffff88800c4fc2b8, ffff88800c4fc360) [ 63.362212] [ 63.362444] The buggy address belongs to the physical page: [ 63.363102] page:000000002a79fe07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4fc [ 63.364201] memcg:ffff88800f06ed01 [ 63.364646] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.365297] page_type: 0xffffffff() [ 63.365773] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.366719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f06ed01 [ 63.367640] page dumped because: kasan: bad access detected [ 63.368315] [ 63.368533] Memory state around the buggy address: [ 63.369119] ffff88800c4fc200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 63.370011] ffff88800c4fc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.370892] >ffff88800c4fc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.371782] ^ [ 63.372258] ffff88800c4fc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 63.373135] ffff88800c4fc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 63.374021] ================================================================== [ 63.375049] Disabling lock debugging due to kernel taint [ 66.007353] BUG: Bad rss-counter state mm:000000000099fb04 type:MM_FILEPAGES val:33 [ 66.008488] BUG: Bad rss-counter state mm:000000000099fb04 type:MM_ANONPAGES val:22 [ 66.361592] BUG: Bad rss-counter state mm:000000006c480262 type:MM_FILEPAGES val:33 [ 66.362764] BUG: Bad rss-counter state mm:000000006c480262 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39861' (ECDSA) to the list of known hosts. 2023/06/20 08:14:36 fuzzer started 2023/06/20 08:14:37 dialing manager at localhost:44161 2023/06/20 08:14:37 checking machine... 2023/06/20 08:14:37 checking revisions... [ 67.168582] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:14:37 testing simple program... [ 67.216698] cgroup: Unknown subsys name 'net' [ 67.269984] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:14:04 Registers: info registers vcpu 0 RAX=ffffffff864baf5b RBX=0000000000000001 RCX=ffffffff864baf56 RDX=dffffc0000000000 RSI=ffffffff864baf5b RDI=ffffffff860545f4 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864baefc R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6c88 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130a53 RFL=00000286 [--S--P-] 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 00007f09dcd65900 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=00007f09dc1a1a00 CR3=000000000f0e0000 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=db5cae278503d8eb00000000000ae988 XMM05=deee01624686c593000000000013a3b0 XMM06=51dd16ab6bed462f0000000000139150 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffcfa06dad8 CR3=000000000fe1a000 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=2036333a34313a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a34313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000