syzkaller login: [ 30.566038] BUG: Bad rss-counter state mm:00000000512e6671 type:MM_FILEPAGES val:33 [ 30.567079] BUG: Bad rss-counter state mm:00000000512e6671 type:MM_ANONPAGES val:22 [ 30.738624] ================================================================== [ 30.739742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740974] Read of size 8 at addr ffff88800c5daa50 by task sshd/221 [ 30.741820] [ 30.742049] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.742929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743929] Call Trace: [ 30.744265] [ 30.744552] dump_stack_lvl+0x91/0xf0 [ 30.745046] print_report+0xcc/0x620 [ 30.745542] ? __virt_addr_valid+0x102/0x340 [ 30.746098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747381] kasan_report+0xbe/0xf0 [ 30.747870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748544] vma_interval_tree_remove+0xc75/0xec0 [ 30.749154] vma_prepare+0xc54/0x11a0 [ 30.749646] __split_vma+0x5af/0x950 [ 30.750136] ? __pfx___split_vma+0x10/0x10 [ 30.750673] ? find_held_lock+0x2c/0x110 [ 30.751198] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751771] ? lock_is_held_type+0x9f/0x120 [ 30.752321] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.752934] ? mtree_range_walk+0x632/0x900 [ 30.753490] ? mas_walk+0x5c7/0x7c0 [ 30.753989] do_vmi_munmap+0x1f1/0x2b0 [ 30.754494] mmap_region+0x1f9/0x2660 [ 30.754985] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.755503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.756214] ? __pfx_lock_acquire+0x10/0x10 [ 30.756774] ? __pfx_mmap_region+0x10/0x10 [ 30.757316] ? security_mmap_addr+0x7d/0xa0 [ 30.757854] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758427] do_mmap+0x854/0xf00 [ 30.758872] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759941] ksys_mmap_pgoff+0x3af/0x500 [ 30.760472] do_syscall_64+0x3f/0x90 [ 30.760953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761622] RIP: 0033:0x7f105c328d82 [ 30.762131] 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 [ 30.764373] RSP: 002b:00007ffcd5a2fe18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.765299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f105c328d82 [ 30.766169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f105b762000 [ 30.767045] RBP: 00007f105b762000 R08: 0000000000000009 R09: 0000000000001000 [ 30.767923] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e8766dec0 [ 30.768976] R13: 00007ffcd5a2fe30 R14: 00007ffcd5a2fe60 R15: 00007ffcd5a301c0 [ 30.770018] [ 30.770365] [ 30.770631] Allocated by task 214: [ 30.771154] kasan_save_stack+0x22/0x50 [ 30.771777] kasan_set_track+0x25/0x30 [ 30.772417] __kasan_slab_alloc+0x59/0x70 [ 30.773061] kmem_cache_alloc+0x16b/0x370 [ 30.773629] vm_area_dup+0x20/0x160 [ 30.774091] __split_vma+0x170/0x950 [ 30.774564] split_vma+0xc6/0x110 [ 30.775003] mprotect_fixup+0x8d2/0xb30 [ 30.775505] do_mprotect_pkey+0x87e/0xd40 [ 30.776028] __x64_sys_mprotect+0x78/0xc0 [ 30.776562] do_syscall_64+0x3f/0x90 [ 30.777044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777691] [ 30.777913] Freed by task 211: [ 30.778304] kasan_save_stack+0x22/0x50 [ 30.778805] kasan_set_track+0x25/0x30 [ 30.779300] kasan_save_free_info+0x2b/0x50 [ 30.779837] __kasan_slab_free+0x10a/0x190 [ 30.780380] kmem_cache_free+0x10d/0x4d0 [ 30.780893] rcu_core+0x8c8/0x2860 [ 30.781347] __do_softirq+0x1b7/0x7d4 [ 30.781827] [ 30.782041] Last potentially related work creation: [ 30.782622] kasan_save_stack+0x22/0x50 [ 30.783127] __kasan_record_aux_stack+0x8e/0xa0 [ 30.783703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.784368] remove_vma+0x139/0x170 [ 30.784824] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.785383] do_vmi_munmap+0x1f1/0x2b0 [ 30.785871] __vm_munmap+0x138/0x3a0 [ 30.786348] __x64_sys_munmap+0x59/0x80 [ 30.786855] do_syscall_64+0x3f/0x90 [ 30.787334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787983] [ 30.788198] The buggy address belongs to the object at ffff88800c5da9f8 [ 30.788198] which belongs to the cache vm_area_struct of size 168 [ 30.789699] The buggy address is located 88 bytes inside of [ 30.789699] freed 168-byte region [ffff88800c5da9f8, ffff88800c5daaa0) [ 30.791113] [ 30.791330] The buggy address belongs to the physical page: [ 30.792008] page:00000000b51f91e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5da [ 30.793138] memcg:ffff88800db52301 [ 30.793579] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.794240] page_type: 0xffffffff() [ 30.794690] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.795637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db52301 [ 30.796563] page dumped because: kasan: bad access detected [ 30.797223] [ 30.797439] Memory state around the buggy address: [ 30.798012] ffff88800c5da900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.798907] ffff88800c5da980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.799761] >ffff88800c5daa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.800622] ^ [ 30.801325] ffff88800c5daa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.802172] ffff88800c5dab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.803020] ================================================================== [ 30.803998] Disabling lock debugging due to kernel taint [ 32.674647] BUG: Bad rss-counter state mm:00000000c0b27353 type:MM_FILEPAGES val:33 [ 32.675686] BUG: Bad rss-counter state mm:00000000c0b27353 type:MM_ANONPAGES val:22 [ 33.141476] BUG: Bad rss-counter state mm:00000000edd7bc6b type:MM_FILEPAGES val:33 [ 33.142561] BUG: Bad rss-counter state mm:00000000edd7bc6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8322' (ECDSA) to the list of known hosts. 2023/06/20 03:15:11 fuzzer started 2023/06/20 03:15:12 dialing manager at localhost:44161 2023/06/20 03:15:12 checking machine... 2023/06/20 03:15:12 checking revisions... [ 33.840399] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:15:12 testing simple program... [ 33.901124] cgroup: Unknown subsys name 'net' [ 33.960247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:15:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09f78 RDI=ffff88806ce09aa0 RBP=ffff88806ce09f78 RSP=ffff88806ce099f0 R8 =ffffffff860d1680 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09f80 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007f8e8c5fd900 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=00007ffda2894000 CR3=0000000019882000 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=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 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=00007f24d4af36f0 CR3=000000000c6b0000 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=2031313a35313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a35313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000