syzkaller login: [ 32.255229] BUG: Bad rss-counter state mm:0000000090c2f275 type:MM_FILEPAGES val:33 [ 32.256286] BUG: Bad rss-counter state mm:0000000090c2f275 type:MM_ANONPAGES val:22 [ 32.428722] ================================================================== [ 32.429681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.430688] Read of size 8 at addr ffff88800ef02b38 by task sshd/221 [ 32.431509] [ 32.431839] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.432791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.433831] Call Trace: [ 32.434174] [ 32.434477] dump_stack_lvl+0x91/0xf0 [ 32.435004] print_report+0xcc/0x620 [ 32.435514] ? __virt_addr_valid+0x102/0x340 [ 32.436146] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.436808] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.437466] kasan_report+0xbe/0xf0 [ 32.437976] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.438634] vma_interval_tree_remove+0xc75/0xec0 [ 32.439290] vma_prepare+0xc54/0x11a0 [ 32.439799] __split_vma+0x5af/0x950 [ 32.440320] ? __pfx___split_vma+0x10/0x10 [ 32.440884] ? find_held_lock+0x2c/0x110 [ 32.441447] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.442057] ? lock_is_held_type+0x9f/0x120 [ 32.442632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.443285] ? mtree_range_walk+0x632/0x900 [ 32.443878] ? mas_walk+0x5c7/0x7c0 [ 32.444416] do_vmi_munmap+0x1f1/0x2b0 [ 32.444941] mmap_region+0x1f9/0x2660 [ 32.445452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.446001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.446763] ? __pfx_lock_acquire+0x10/0x10 [ 32.447335] ? __pfx_mmap_region+0x10/0x10 [ 32.447903] ? security_mmap_addr+0x7d/0xa0 [ 32.448482] ? get_unmapped_area+0x1f5/0x3f0 [ 32.449078] do_mmap+0x854/0xf00 [ 32.449548] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.450075] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.450676] ksys_mmap_pgoff+0x3af/0x500 [ 32.451217] do_syscall_64+0x3f/0x90 [ 32.451725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.452434] RIP: 0033:0x7fac22628d82 [ 32.452924] 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 [ 32.455190] RSP: 002b:00007ffc05735728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.456184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac22628d82 [ 32.457087] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac21a62000 [ 32.458002] RBP: 00007fac21a62000 R08: 0000000000000009 R09: 0000000000001000 [ 32.458926] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a3d065ec0 [ 32.459826] R13: 00007ffc05735740 R14: 00007ffc05735770 R15: 00007ffc05735ad0 [ 32.460750] [ 32.461063] [ 32.461298] Allocated by task 214: [ 32.461751] kasan_save_stack+0x22/0x50 [ 32.462291] kasan_set_track+0x25/0x30 [ 32.462824] __kasan_slab_alloc+0x59/0x70 [ 32.463385] kmem_cache_alloc+0x16b/0x370 [ 32.463946] vm_area_dup+0x20/0x160 [ 32.464464] __split_vma+0x170/0x950 [ 32.464969] split_vma+0xc6/0x110 [ 32.465447] mprotect_fixup+0x8d2/0xb30 [ 32.465988] do_mprotect_pkey+0x87e/0xd40 [ 32.466558] __x64_sys_mprotect+0x78/0xc0 [ 32.467130] do_syscall_64+0x3f/0x90 [ 32.467656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.468376] [ 32.468615] Freed by task 214: [ 32.469052] kasan_save_stack+0x22/0x50 [ 32.469609] kasan_set_track+0x25/0x30 [ 32.470159] kasan_save_free_info+0x2b/0x50 [ 32.470747] __kasan_slab_free+0x10a/0x190 [ 32.471339] kmem_cache_free+0x10d/0x4d0 [ 32.471901] rcu_core+0x8c8/0x2860 [ 32.472406] __do_softirq+0x1b7/0x7d4 [ 32.472933] [ 32.473173] Last potentially related work creation: [ 32.473823] kasan_save_stack+0x22/0x50 [ 32.474384] __kasan_record_aux_stack+0x8e/0xa0 [ 32.475023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.475734] remove_vma+0x139/0x170 [ 32.476253] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.476869] do_vmi_munmap+0x1f1/0x2b0 [ 32.477409] __vm_munmap+0x138/0x3a0 [ 32.477932] __x64_sys_munmap+0x59/0x80 [ 32.478481] do_syscall_64+0x3f/0x90 [ 32.479009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.479721] [ 32.479965] The buggy address belongs to the object at ffff88800ef02ae0 [ 32.479965] which belongs to the cache vm_area_struct of size 168 [ 32.481607] The buggy address is located 88 bytes inside of [ 32.481607] freed 168-byte region [ffff88800ef02ae0, ffff88800ef02b88) [ 32.483151] [ 32.483383] The buggy address belongs to the physical page: [ 32.484113] page:0000000097c4ed2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef02 [ 32.485272] memcg:ffff88800dd6bd01 [ 32.485730] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.486478] page_type: 0xffffffff() [ 32.486963] raw: 0100000000000200 ffff88800879fc80 ffffea0000366e40 dead000000000003 [ 32.487952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd6bd01 [ 32.488929] page dumped because: kasan: bad access detected [ 32.489632] [ 32.489864] Memory state around the buggy address: [ 32.490490] ffff88800ef02a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.491401] ffff88800ef02a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.492331] >ffff88800ef02b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.493248] ^ [ 32.493901] ffff88800ef02b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 32.494815] ffff88800ef02c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.495724] ================================================================== [ 32.497131] Disabling lock debugging due to kernel taint [ 33.997418] BUG: Bad rss-counter state mm:00000000bfbb8d1a type:MM_FILEPAGES val:33 [ 33.997976] BUG: Bad rss-counter state mm:00000000bfbb8d1a type:MM_ANONPAGES val:22 [ 34.347796] BUG: Bad rss-counter state mm:00000000d60ffb97 type:MM_FILEPAGES val:33 [ 34.348397] BUG: Bad rss-counter state mm:00000000d60ffb97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14449' (ECDSA) to the list of known hosts. 2023/06/19 18:14:54 fuzzer started 2023/06/19 18:14:54 dialing manager at localhost:44161 2023/06/19 18:14:54 checking machine... 2023/06/19 18:14:54 checking revisions... [ 35.063155] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:14:54 testing simple program... [ 35.114258] cgroup: Unknown subsys name 'net' [ 35.151970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:14:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe2bec4888 CR3=0000000005482000 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=00007f3588fda510000055f1276fe790 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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a27fc48 RCX=0000000000000000 RDX=ffff88800ef98000 RSI=ffffffff8189f44d RDI=0000000000000005 RBP=ffff88801a27f9d0 RSP=ffff88801a27f8d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800c11d318 R13=0000000000000040 R14=0000000000000051 R15=ffff888008ec1220 RIP=ffffffff814c07e0 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 00007f65cf5e9900 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=00007f65cfba10b0 CR3=000000001a336000 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=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