syzkaller login: [ 33.355127] BUG: Bad rss-counter state mm:00000000e7cded64 type:MM_FILEPAGES val:33 [ 33.356604] BUG: Bad rss-counter state mm:00000000e7cded64 type:MM_ANONPAGES val:22 [ 33.521963] ================================================================== [ 33.523011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.523897] Read of size 8 at addr ffff88800efa54e0 by task sshd/220 [ 33.524732] [ 33.524944] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.525748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.526682] Call Trace: [ 33.526987] [ 33.527263] dump_stack_lvl+0x91/0xf0 [ 33.527730] print_report+0xcc/0x620 [ 33.528196] ? __virt_addr_valid+0x102/0x340 [ 33.528723] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.529307] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.529888] kasan_report+0xbe/0xf0 [ 33.530348] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.530944] vma_interval_tree_remove+0xc75/0xec0 [ 33.531545] vma_prepare+0xc54/0x11a0 [ 33.532026] __split_vma+0x5af/0x950 [ 33.532508] ? __pfx___split_vma+0x10/0x10 [ 33.533037] ? find_held_lock+0x2c/0x110 [ 33.533552] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.534138] ? lock_is_held_type+0x9f/0x120 [ 33.534689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.535303] ? mtree_range_walk+0x632/0x900 [ 33.535846] ? mas_walk+0x5c7/0x7c0 [ 33.536319] do_vmi_munmap+0x1f1/0x2b0 [ 33.536809] mmap_region+0x1f9/0x2660 [ 33.537298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.537806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.538538] ? __pfx_lock_acquire+0x10/0x10 [ 33.539064] ? __pfx_mmap_region+0x10/0x10 [ 33.539593] ? security_mmap_addr+0x7d/0xa0 [ 33.540121] ? get_unmapped_area+0x1f5/0x3f0 [ 33.540666] do_mmap+0x854/0xf00 [ 33.541096] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.541586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.542146] ksys_mmap_pgoff+0x3af/0x500 [ 33.542656] do_syscall_64+0x3f/0x90 [ 33.543123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.543770] RIP: 0033:0x7f2c22453d82 [ 33.544222] 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 [ 33.546346] RSP: 002b:00007ffe39d69238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.547249] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c22453d82 [ 33.548109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c2188d000 [ 33.548952] RBP: 00007f2c2188d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.549806] R10: 0000000000000812 R11: 0000000000000206 R12: 000055770f6a2d90 [ 33.550660] R13: 00007ffe39d69250 R14: 00007ffe39d69280 R15: 00007ffe39d695e0 [ 33.551513] [ 33.551808] [ 33.552024] Allocated by task 213: [ 33.552447] kasan_save_stack+0x22/0x50 [ 33.552943] kasan_set_track+0x25/0x30 [ 33.553431] __kasan_slab_alloc+0x59/0x70 [ 33.553949] kmem_cache_alloc+0x16b/0x370 [ 33.554480] vm_area_dup+0x20/0x160 [ 33.554931] __split_vma+0x170/0x950 [ 33.555396] split_vma+0xc6/0x110 [ 33.555831] mprotect_fixup+0x8d2/0xb30 [ 33.556334] do_mprotect_pkey+0x87e/0xd40 [ 33.556848] __x64_sys_mprotect+0x78/0xc0 [ 33.557378] do_syscall_64+0x3f/0x90 [ 33.557845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.558497] [ 33.558710] Freed by task 213: [ 33.559104] kasan_save_stack+0x22/0x50 [ 33.559608] kasan_set_track+0x25/0x30 [ 33.560111] kasan_save_free_info+0x2b/0x50 [ 33.560638] __kasan_slab_free+0x10a/0x190 [ 33.561170] kmem_cache_free+0x10d/0x4d0 [ 33.561683] rcu_core+0x8c8/0x2860 [ 33.562142] __do_softirq+0x1b7/0x7d4 [ 33.562617] [ 33.562831] Last potentially related work creation: [ 33.563421] kasan_save_stack+0x22/0x50 [ 33.563923] __kasan_record_aux_stack+0x8e/0xa0 [ 33.564498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.565137] remove_vma+0x139/0x170 [ 33.565584] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.566141] do_vmi_munmap+0x1f1/0x2b0 [ 33.566624] __vm_munmap+0x138/0x3a0 [ 33.567092] __x64_sys_munmap+0x59/0x80 [ 33.567597] do_syscall_64+0x3f/0x90 [ 33.568069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.568705] [ 33.568914] The buggy address belongs to the object at ffff88800efa5488 [ 33.568914] which belongs to the cache vm_area_struct of size 168 [ 33.570411] The buggy address is located 88 bytes inside of [ 33.570411] freed 168-byte region [ffff88800efa5488, ffff88800efa5530) [ 33.571819] [ 33.572033] The buggy address belongs to the physical page: [ 33.572699] page:00000000987d0504 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa5 [ 33.573798] memcg:ffff88800e83ed01 [ 33.574236] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.574939] page_type: 0xffffffff() [ 33.575384] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.576308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e83ed01 [ 33.577219] page dumped because: kasan: bad access detected [ 33.577874] [ 33.578095] Memory state around the buggy address: [ 33.578678] ffff88800efa5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.579536] ffff88800efa5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.580380] >ffff88800efa5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.581235] ^ [ 33.581986] ffff88800efa5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 33.582853] ffff88800efa5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.583696] ================================================================== [ 33.584643] Disabling lock debugging due to kernel taint [ 35.475798] BUG: Bad rss-counter state mm:00000000a1b39d54 type:MM_FILEPAGES val:33 [ 35.476458] BUG: Bad rss-counter state mm:00000000a1b39d54 type:MM_ANONPAGES val:22 [ 35.990875] BUG: Bad rss-counter state mm:00000000ffc7cf97 type:MM_FILEPAGES val:33 [ 35.992075] BUG: Bad rss-counter state mm:00000000ffc7cf97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20822' (ECDSA) to the list of known hosts. 2023/06/19 23:15:24 fuzzer started 2023/06/19 23:15:24 dialing manager at localhost:44161 2023/06/19 23:15:25 checking machine... 2023/06/19 23:15:25 checking revisions... [ 36.629417] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:15:25 testing simple program... [ 36.683311] cgroup: Unknown subsys name 'net' [ 36.757243] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:15:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010397498 RCX=ffffffff844f1db4 RDX=ffff8880145ad1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000003 RSP=ffff888010397400 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000001 R12=0000000000000003 R13=ffff8880103974b0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844f1db4 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 00007f60518f9900 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=00007f8d73529650 CR3=000000000d84c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=561a2cde1e164ed700000000000ae988 XMM05=5646563fa25678c00000000000135028 XMM06=e3501c96630a510e0000000000133dc8 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=00007ffca9828000 CR3=0000000005482000 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=00007ff41010a510000056047c07f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000