syzkaller login: [ 39.837242] BUG: Bad rss-counter state mm:0000000083db23e8 type:MM_FILEPAGES val:33 [ 39.838275] BUG: Bad rss-counter state mm:0000000083db23e8 type:MM_ANONPAGES val:22 [ 40.001804] ================================================================== [ 40.002723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.003660] Read of size 8 at addr ffff88800dbf8a50 by task sshd/219 [ 40.004588] [ 40.004809] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.005688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.006686] Call Trace: [ 40.007009] [ 40.007299] dump_stack_lvl+0x91/0xf0 [ 40.007786] print_report+0xcc/0x620 [ 40.008273] ? __virt_addr_valid+0x102/0x340 [ 40.008837] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.009459] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.010077] kasan_report+0xbe/0xf0 [ 40.010551] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.011177] vma_interval_tree_remove+0xc75/0xec0 [ 40.011781] vma_prepare+0xc54/0x11a0 [ 40.012257] __split_vma+0x5af/0x950 [ 40.012725] ? __pfx___split_vma+0x10/0x10 [ 40.013265] ? find_held_lock+0x2c/0x110 [ 40.013794] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.014363] ? lock_is_held_type+0x9f/0x120 [ 40.014902] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.015520] ? mtree_range_walk+0x632/0x900 [ 40.016073] ? mas_walk+0x5c7/0x7c0 [ 40.016575] do_vmi_munmap+0x1f1/0x2b0 [ 40.017097] mmap_region+0x1f9/0x2660 [ 40.017575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.018087] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.018799] ? __pfx_lock_acquire+0x10/0x10 [ 40.019336] ? __pfx_mmap_region+0x10/0x10 [ 40.019873] ? security_mmap_addr+0x7d/0xa0 [ 40.020398] ? get_unmapped_area+0x1f5/0x3f0 [ 40.020956] do_mmap+0x854/0xf00 [ 40.021400] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.021907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.022484] ksys_mmap_pgoff+0x3af/0x500 [ 40.022988] do_syscall_64+0x3f/0x90 [ 40.023468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.024110] RIP: 0033:0x7fcd2297dd82 [ 40.024565] 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 [ 40.026710] RSP: 002b:00007fff93389c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.027609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd2297dd82 [ 40.028465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd21db7000 [ 40.029329] RBP: 00007fcd21db7000 R08: 0000000000000009 R09: 0000000000001000 [ 40.030171] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564eca0b8b20 [ 40.031018] R13: 00007fff93389c50 R14: 00007fff93389c80 R15: 00007fff93389fe0 [ 40.031888] [ 40.032179] [ 40.032393] Allocated by task 212: [ 40.032818] kasan_save_stack+0x22/0x50 [ 40.033334] kasan_set_track+0x25/0x30 [ 40.033825] __kasan_slab_alloc+0x59/0x70 [ 40.034352] kmem_cache_alloc+0x16b/0x370 [ 40.034868] vm_area_dup+0x20/0x160 [ 40.035333] __split_vma+0x170/0x950 [ 40.035800] split_vma+0xc6/0x110 [ 40.036241] mprotect_fixup+0x8d2/0xb30 [ 40.036742] do_mprotect_pkey+0x87e/0xd40 [ 40.037276] __x64_sys_mprotect+0x78/0xc0 [ 40.037797] do_syscall_64+0x3f/0x90 [ 40.038267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.038911] [ 40.039132] Freed by task 212: [ 40.039522] kasan_save_stack+0x22/0x50 [ 40.040024] kasan_set_track+0x25/0x30 [ 40.040518] kasan_save_free_info+0x2b/0x50 [ 40.041054] __kasan_slab_free+0x10a/0x190 [ 40.041590] kmem_cache_free+0x10d/0x4d0 [ 40.042105] rcu_core+0x8c8/0x2860 [ 40.042550] __do_softirq+0x1b7/0x7d4 [ 40.043024] [ 40.043242] Last potentially related work creation: [ 40.043837] kasan_save_stack+0x22/0x50 [ 40.044339] __kasan_record_aux_stack+0x8e/0xa0 [ 40.044916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.045673] remove_vma+0x139/0x170 [ 40.046127] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.046692] do_vmi_munmap+0x1f1/0x2b0 [ 40.047186] __vm_munmap+0x138/0x3a0 [ 40.047689] __x64_sys_munmap+0x59/0x80 [ 40.048187] do_syscall_64+0x3f/0x90 [ 40.048666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.049317] [ 40.049531] The buggy address belongs to the object at ffff88800dbf89f8 [ 40.049531] which belongs to the cache vm_area_struct of size 168 [ 40.051023] The buggy address is located 88 bytes inside of [ 40.051023] freed 168-byte region [ffff88800dbf89f8, ffff88800dbf8aa0) [ 40.052460] [ 40.052680] The buggy address belongs to the physical page: [ 40.053378] page:000000004e7aad6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbf8 [ 40.054496] memcg:ffff88800eb87301 [ 40.054937] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.055591] page_type: 0xffffffff() [ 40.056050] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.056986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb87301 [ 40.057891] page dumped because: kasan: bad access detected [ 40.058550] [ 40.058774] Memory state around the buggy address: [ 40.059355] ffff88800dbf8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.060206] ffff88800dbf8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 40.061070] >ffff88800dbf8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.061915] ^ [ 40.062614] ffff88800dbf8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.063476] ffff88800dbf8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.064343] ================================================================== [ 40.065312] Disabling lock debugging due to kernel taint [ 42.634264] BUG: Bad rss-counter state mm:00000000aaa58e68 type:MM_FILEPAGES val:33 [ 42.635252] BUG: Bad rss-counter state mm:00000000aaa58e68 type:MM_ANONPAGES val:22 [ 43.053134] BUG: Bad rss-counter state mm:000000008468b98f type:MM_FILEPAGES val:33 [ 43.054229] BUG: Bad rss-counter state mm:000000008468b98f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7902' (ECDSA) to the list of known hosts. 2023/06/19 23:51:29 fuzzer started 2023/06/19 23:51:29 dialing manager at localhost:44161 2023/06/19 23:51:29 checking machine... 2023/06/19 23:51:29 checking revisions... [ 43.656905] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:51:30 testing simple program... [ 43.704637] cgroup: Unknown subsys name 'net' [ 43.763475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818ea3aa RDI=ffff888019eb55b4 RBP=0000000000000003 RSP=ffff888016df78c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800cb40a00 R13=ffff88800cb40a00 R14=ffff88800cb40a58 R15=0000000000000003 RIP=ffffffff814c07e4 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 00007fd0e0e2c700 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=00007f95007430b0 CR3=000000000f70c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c58400 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=00007f4309d68fd0 CR3=000000000d8cc000 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=3accd0d9f87e22bb024085afc84c4ddb XMM02=000000000011d260eff9b2d0a8fce9cb XMM03=000000000011d3302c67c8bc2e329bc3 XMM04=6df9df192a74d94300000000000ae988 XMM05=19e9129bd510f2350000000000134408 XMM06=947b08de0ee09f810000000000133c88 XMM07=e042d86d42eb936e00000000001242f8 XMM08=0faac4c0ea5d38b4000000000011d330 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000