syzkaller login: [ 30.896020] BUG: Bad rss-counter state mm:00000000f03312a1 type:MM_FILEPAGES val:33 [ 30.897477] BUG: Bad rss-counter state mm:00000000f03312a1 type:MM_ANONPAGES val:22 [ 31.049522] ================================================================== [ 31.050622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.051855] Read of size 8 at addr ffff8880164813f8 by task sshd/220 [ 31.052783] [ 31.053059] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.054019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.055033] Call Trace: [ 31.055347] [ 31.055629] dump_stack_lvl+0x91/0xf0 [ 31.056120] print_report+0xcc/0x620 [ 31.056597] ? __virt_addr_valid+0x102/0x340 [ 31.057143] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057753] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058377] kasan_report+0xbe/0xf0 [ 31.058852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059462] vma_interval_tree_remove+0xc75/0xec0 [ 31.060062] vma_prepare+0xc54/0x11a0 [ 31.060535] __split_vma+0x5af/0x950 [ 31.061000] ? __pfx___split_vma+0x10/0x10 [ 31.061527] ? find_held_lock+0x2c/0x110 [ 31.062041] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.062604] ? lock_is_held_type+0x9f/0x120 [ 31.063143] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.063737] ? mtree_range_walk+0x632/0x900 [ 31.064285] ? mas_walk+0x5c7/0x7c0 [ 31.064746] do_vmi_munmap+0x1f1/0x2b0 [ 31.065238] mmap_region+0x1f9/0x2660 [ 31.065713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.066219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.066943] ? __pfx_lock_acquire+0x10/0x10 [ 31.067469] ? __pfx_mmap_region+0x10/0x10 [ 31.067999] ? security_mmap_addr+0x7d/0xa0 [ 31.068524] ? get_unmapped_area+0x1f5/0x3f0 [ 31.069087] do_mmap+0x854/0xf00 [ 31.069523] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.070009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.070574] ksys_mmap_pgoff+0x3af/0x500 [ 31.071087] do_syscall_64+0x3f/0x90 [ 31.071560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072203] RIP: 0033:0x7ff7c3c1ad82 [ 31.072651] 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 [ 31.074788] RSP: 002b:00007ffd97269fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.075714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7c3c1ad82 [ 31.076563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7c3054000 [ 31.077407] RBP: 00007ff7c3054000 R08: 0000000000000009 R09: 0000000000001000 [ 31.078262] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562537bfbd90 [ 31.079112] R13: 00007ffd9726a000 R14: 00007ffd9726a030 R15: 00007ffd9726a390 [ 31.079963] [ 31.080249] [ 31.080465] Allocated by task 213: [ 31.080902] kasan_save_stack+0x22/0x50 [ 31.081410] kasan_set_track+0x25/0x30 [ 31.081899] __kasan_slab_alloc+0x59/0x70 [ 31.082470] kmem_cache_alloc+0x16b/0x370 [ 31.083115] vm_area_dup+0x20/0x160 [ 31.083545] __split_vma+0x170/0x950 [ 31.083990] split_vma+0xc6/0x110 [ 31.084404] mprotect_fixup+0x8d2/0xb30 [ 31.084877] do_mprotect_pkey+0x87e/0xd40 [ 31.085364] __x64_sys_mprotect+0x78/0xc0 [ 31.085855] do_syscall_64+0x3f/0x90 [ 31.086304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086921] [ 31.087128] Freed by task 213: [ 31.087496] kasan_save_stack+0x22/0x50 [ 31.087970] kasan_set_track+0x25/0x30 [ 31.088432] kasan_save_free_info+0x2b/0x50 [ 31.088934] __kasan_slab_free+0x10a/0x190 [ 31.089436] kmem_cache_free+0x10d/0x4d0 [ 31.089916] rcu_core+0x8c8/0x2860 [ 31.090337] __do_softirq+0x1b7/0x7d4 [ 31.090786] [ 31.091002] Last potentially related work creation: [ 31.091550] kasan_save_stack+0x22/0x50 [ 31.092023] __kasan_record_aux_stack+0x8e/0xa0 [ 31.092562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.093163] remove_vma+0x139/0x170 [ 31.093596] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.094116] do_vmi_munmap+0x1f1/0x2b0 [ 31.094569] __vm_munmap+0x138/0x3a0 [ 31.095031] __x64_sys_munmap+0x59/0x80 [ 31.095492] do_syscall_64+0x3f/0x90 [ 31.095947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096552] [ 31.096758] The buggy address belongs to the object at ffff8880164813a0 [ 31.096758] which belongs to the cache vm_area_struct of size 168 [ 31.098133] The buggy address is located 88 bytes inside of [ 31.098133] freed 168-byte region [ffff8880164813a0, ffff888016481448) [ 31.099487] [ 31.099700] The buggy address belongs to the physical page: [ 31.100361] page:0000000054f7e503 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16481 [ 31.101449] memcg:ffff88800cbced01 [ 31.101867] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.102506] page_type: 0xffffffff() [ 31.102976] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.103907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbced01 [ 31.104801] page dumped because: kasan: bad access detected [ 31.105458] [ 31.105674] Memory state around the buggy address: [ 31.106248] ffff888016481280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.107123] ffff888016481300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.107982] >ffff888016481380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.108826] ^ [ 31.109675] ffff888016481400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.110521] ffff888016481480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.111365] ================================================================== [ 31.112579] Disabling lock debugging due to kernel taint [ 33.830409] BUG: Bad rss-counter state mm:00000000ecc806e6 type:MM_FILEPAGES val:33 [ 33.831446] BUG: Bad rss-counter state mm:00000000ecc806e6 type:MM_ANONPAGES val:22 [ 34.330960] BUG: Bad rss-counter state mm:00000000f6a71d06 type:MM_FILEPAGES val:33 [ 34.332662] BUG: Bad rss-counter state mm:00000000f6a71d06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22538' (ECDSA) to the list of known hosts. 2023/06/20 13:45:04 fuzzer started 2023/06/20 13:45:04 dialing manager at localhost:36067 2023/06/20 13:45:04 checking machine... 2023/06/20 13:45:04 checking revisions... [ 34.981435] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:45:05 testing simple program... [ 35.036718] cgroup: Unknown subsys name 'net' [ 35.078804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:45:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f6575103120 CR3=0000000015b08000 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=2034303a35343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a35343a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff83871c52 RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a60 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000091be9 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888018119b40 R15=ffff88800fd3b5c0 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f5205cbd900 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=00007ffe1f78c000 CR3=000000000ea52000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000