syzkaller login: [ 47.124421] BUG: Bad rss-counter state mm:00000000f2d0fbab type:MM_FILEPAGES val:33 [ 47.125644] BUG: Bad rss-counter state mm:00000000f2d0fbab type:MM_ANONPAGES val:22 [ 47.164447] ================================================================== [ 47.165430] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.166351] Read of size 8 at addr ffff888018c04968 by task sshd/220 [ 47.167171] [ 47.167395] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.168249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.169224] Call Trace: [ 47.169543] [ 47.169822] dump_stack_lvl+0x91/0xf0 [ 47.170306] print_report+0xcc/0x620 [ 47.170779] ? __virt_addr_valid+0x102/0x340 [ 47.171324] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.171928] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.172543] kasan_report+0xbe/0xf0 [ 47.173015] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.173631] vma_interval_tree_remove+0xc75/0xec0 [ 47.174225] vma_prepare+0xc54/0x11a0 [ 47.174710] __split_vma+0x5af/0x950 [ 47.175184] ? __pfx___split_vma+0x10/0x10 [ 47.175705] ? find_held_lock+0x2c/0x110 [ 47.176225] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.176822] ? lock_is_held_type+0x9f/0x120 [ 47.177359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.178053] ? mtree_range_walk+0x632/0x900 [ 47.178762] ? mas_walk+0x5c7/0x7c0 [ 47.179390] do_vmi_munmap+0x1f1/0x2b0 [ 47.180064] mmap_region+0x1f9/0x2660 [ 47.180686] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.181206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.181935] ? __pfx_lock_acquire+0x10/0x10 [ 47.182480] ? __pfx_mmap_region+0x10/0x10 [ 47.183004] ? security_mmap_addr+0x7d/0xa0 [ 47.183547] ? get_unmapped_area+0x1f5/0x3f0 [ 47.184098] do_mmap+0x854/0xf00 [ 47.184624] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.185141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.185700] ksys_mmap_pgoff+0x3af/0x500 [ 47.186206] do_syscall_64+0x3f/0x90 [ 47.186681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.187323] RIP: 0033:0x7fced10fbd82 [ 47.187776] 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 [ 47.189904] RSP: 002b:00007fff01ca5dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.190802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fced10fbd82 [ 47.191647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fced0535000 [ 47.192501] RBP: 00007fced0535000 R08: 0000000000000009 R09: 0000000000001000 [ 47.193349] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce69a50d90 [ 47.194191] R13: 00007fff01ca5de0 R14: 00007fff01ca5e10 R15: 00007fff01ca6170 [ 47.195047] [ 47.195339] [ 47.195551] Allocated by task 213: [ 47.195975] kasan_save_stack+0x22/0x50 [ 47.196477] kasan_set_track+0x25/0x30 [ 47.196982] __kasan_slab_alloc+0x59/0x70 [ 47.197504] kmem_cache_alloc+0x16b/0x370 [ 47.198015] vm_area_dup+0x20/0x160 [ 47.198467] __split_vma+0x170/0x950 [ 47.198936] split_vma+0xc6/0x110 [ 47.199370] mprotect_fixup+0x8d2/0xb30 [ 47.199866] do_mprotect_pkey+0x87e/0xd40 [ 47.200394] __x64_sys_mprotect+0x78/0xc0 [ 47.200978] do_syscall_64+0x3f/0x90 [ 47.201475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.202119] [ 47.202332] Freed by task 213: [ 47.202757] kasan_save_stack+0x22/0x50 [ 47.203254] kasan_set_track+0x25/0x30 [ 47.203770] kasan_save_free_info+0x2b/0x50 [ 47.204303] __kasan_slab_free+0x10a/0x190 [ 47.204867] kmem_cache_free+0x10d/0x4d0 [ 47.205382] rcu_core+0x8c8/0x2860 [ 47.205834] __do_softirq+0x1b7/0x7d4 [ 47.206306] [ 47.206554] Last potentially related work creation: [ 47.207135] kasan_save_stack+0x22/0x50 [ 47.207662] __kasan_record_aux_stack+0x8e/0xa0 [ 47.208236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.208923] remove_vma+0x139/0x170 [ 47.209383] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.209951] do_vmi_munmap+0x1f1/0x2b0 [ 47.210475] __vm_munmap+0x138/0x3a0 [ 47.210944] __x64_sys_munmap+0x59/0x80 [ 47.211453] do_syscall_64+0x3f/0x90 [ 47.211922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.212594] [ 47.212815] The buggy address belongs to the object at ffff888018c04910 [ 47.212815] which belongs to the cache vm_area_struct of size 168 [ 47.214283] The buggy address is located 88 bytes inside of [ 47.214283] freed 168-byte region [ffff888018c04910, ffff888018c049b8) [ 47.215726] [ 47.215942] The buggy address belongs to the physical page: [ 47.216638] page:0000000066e197ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c04 [ 47.217745] memcg:ffff888019ce5401 [ 47.218172] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.218852] page_type: 0xffffffff() [ 47.219297] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.220218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ce5401 [ 47.221155] page dumped because: kasan: bad access detected [ 47.221824] [ 47.222037] Memory state around the buggy address: [ 47.222644] ffff888018c04800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 47.223511] ffff888018c04880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 47.224364] >ffff888018c04900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.225256] ^ [ 47.226054] ffff888018c04980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 47.226943] ffff888018c04a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.227824] ================================================================== [ 47.229089] Disabling lock debugging due to kernel taint [ 49.433108] BUG: Bad rss-counter state mm:000000008faf6912 type:MM_FILEPAGES val:33 [ 49.434094] BUG: Bad rss-counter state mm:000000008faf6912 type:MM_ANONPAGES val:22 [ 49.914672] BUG: Bad rss-counter state mm:00000000780d377c type:MM_FILEPAGES val:33 [ 49.915707] BUG: Bad rss-counter state mm:00000000780d377c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61167' (ECDSA) to the list of known hosts. 2023/06/19 22:09:45 fuzzer started 2023/06/19 22:09:46 dialing manager at localhost:44161 2023/06/19 22:09:46 checking machine... 2023/06/19 22:09:46 checking revisions... [ 50.620829] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:09:46 testing simple program... [ 50.669768] cgroup: Unknown subsys name 'net' [ 50.733244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:09:29 Registers: info registers vcpu 0 RAX=ffffffff8186bab8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002b62ede RSI=ffffffff8186bab8 RDI=ffff888015b17760 RBP=ffff888015b17730 RSP=ffff888015b17690 R8 =0000000000000001 R9 =ffff888015b176d8 R10=0000000000038001 R11=0000000000038dc4 R12=ffff888015b17760 R13=0000000000000000 R14=ffff88800f690000 R15=0000000000000dc0 RIP=ffffffff813ad424 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fecac4e0900 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=00007fecaca980b0 CR3=0000000017c68000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c8da RBX=0000000000000002 RCX=ffffffff86137d01 RDX=ffff88806cf09ae0 RSI=ffffffff8180c8da RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09b60 R13=ffff88806cf09ae0 R14=ffff888008d751c0 R15=ffff88806cf09a98 RIP=ffffffff81130641 RFL=00000246 [---Z-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 =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=00007fcf15a35bb0 CR3=000000000c994000 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=f1e99cbf01b81a8db0423e51bee8846b XMM02=ec2efd57dc4c00df000000000011cb80 XMM03=05fc4c65fa941875000000000011cc50 XMM04=06e7f0aaa54fe05e00000000000ae988 XMM05=19e9129bd510f2350000000000133c38 XMM06=8383c88780f1b71a0000000000132aa0 XMM07=e042d86d42eb936e0000000000124310 XMM08=05fc4c65fa941875000000000011cc50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000