syzkaller login: [ 32.833783] BUG: Bad rss-counter state mm:0000000024bf313d type:MM_FILEPAGES val:32 [ 32.835011] BUG: Bad rss-counter state mm:0000000024bf313d type:MM_ANONPAGES val:22 [ 32.873589] ================================================================== [ 32.874524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.875524] Read of size 8 at addr ffff88801a184880 by task sshd/221 [ 32.876323] [ 32.876553] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.877443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.878452] Call Trace: [ 32.878781] [ 32.879089] dump_stack_lvl+0x91/0xf0 [ 32.879602] print_report+0xcc/0x620 [ 32.880106] ? __virt_addr_valid+0x102/0x340 [ 32.880670] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.881315] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.881955] kasan_report+0xbe/0xf0 [ 32.882442] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.883115] vma_interval_tree_remove+0xc75/0xec0 [ 32.883755] vma_prepare+0xc54/0x11a0 [ 32.884252] __split_vma+0x5af/0x950 [ 32.884751] ? __pfx___split_vma+0x10/0x10 [ 32.885293] ? find_held_lock+0x2c/0x110 [ 32.885826] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.886423] ? lock_is_held_type+0x9f/0x120 [ 32.887002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.887637] ? mtree_range_walk+0x632/0x900 [ 32.888206] ? mas_walk+0x5c7/0x7c0 [ 32.888697] do_vmi_munmap+0x1f1/0x2b0 [ 32.889215] mmap_region+0x1f9/0x2660 [ 32.889711] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.890244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.891016] ? __pfx_lock_acquire+0x10/0x10 [ 32.891575] ? __pfx_mmap_region+0x10/0x10 [ 32.892137] ? security_mmap_addr+0x7d/0xa0 [ 32.892707] ? get_unmapped_area+0x1f5/0x3f0 [ 32.893278] do_mmap+0x854/0xf00 [ 32.893735] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.894249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.894842] ksys_mmap_pgoff+0x3af/0x500 [ 32.895385] do_syscall_64+0x3f/0x90 [ 32.895884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.896561] RIP: 0033:0x7f6153c6cd82 [ 32.897038] 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 [ 32.899283] RSP: 002b:00007ffd989c54b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.900235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6153c6cd82 [ 32.901263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61530a6000 [ 32.902161] RBP: 00007f61530a6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.903064] R10: 0000000000000812 R11: 0000000000000206 R12: 000056346d370980 [ 32.903953] R13: 00007ffd989c54d0 R14: 00007ffd989c5500 R15: 00007ffd989c5860 [ 32.904911] [ 32.905210] [ 32.905435] Allocated by task 214: [ 32.905894] kasan_save_stack+0x22/0x50 [ 32.906418] kasan_set_track+0x25/0x30 [ 32.906942] __kasan_slab_alloc+0x59/0x70 [ 32.907499] kmem_cache_alloc+0x16b/0x370 [ 32.908043] vm_area_dup+0x20/0x160 [ 32.908517] __split_vma+0x170/0x950 [ 32.909007] split_vma+0xc6/0x110 [ 32.909462] mprotect_fixup+0x8d2/0xb30 [ 32.909974] do_mprotect_pkey+0x87e/0xd40 [ 32.910517] __x64_sys_mprotect+0x78/0xc0 [ 32.911071] do_syscall_64+0x3f/0x90 [ 32.911574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.912255] [ 32.912479] Freed by task 19: [ 32.912885] kasan_save_stack+0x22/0x50 [ 32.913413] kasan_set_track+0x25/0x30 [ 32.913936] kasan_save_free_info+0x2b/0x50 [ 32.914489] __kasan_slab_free+0x10a/0x190 [ 32.915063] kmem_cache_free+0x10d/0x4d0 [ 32.915599] rcu_core+0x8c8/0x2860 [ 32.916057] __do_softirq+0x1b7/0x7d4 [ 32.916546] [ 32.916771] Last potentially related work creation: [ 32.917391] kasan_save_stack+0x22/0x50 [ 32.917929] __kasan_record_aux_stack+0x8e/0xa0 [ 32.918530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.919209] remove_vma+0x139/0x170 [ 32.919677] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.920253] do_vmi_munmap+0x1f1/0x2b0 [ 32.920759] __vm_munmap+0x138/0x3a0 [ 32.921248] __x64_sys_munmap+0x59/0x80 [ 32.921762] do_syscall_64+0x3f/0x90 [ 32.922245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.922920] [ 32.923146] The buggy address belongs to the object at ffff88801a184828 [ 32.923146] which belongs to the cache vm_area_struct of size 168 [ 32.924674] The buggy address is located 88 bytes inside of [ 32.924674] freed 168-byte region [ffff88801a184828, ffff88801a1848d0) [ 32.926148] [ 32.926370] The buggy address belongs to the physical page: [ 32.927085] page:00000000b63978f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a184 [ 32.928233] memcg:ffff8880159b2401 [ 32.928677] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.929352] page_type: 0xffffffff() [ 32.929821] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.930772] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159b2401 [ 32.931736] page dumped because: kasan: bad access detected [ 32.932432] [ 32.932653] Memory state around the buggy address: [ 32.933258] ffff88801a184780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.934149] ffff88801a184800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.935045] >ffff88801a184880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.935937] ^ [ 32.936363] ffff88801a184900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.937230] ffff88801a184980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.938089] ================================================================== [ 32.939600] Disabling lock debugging due to kernel taint [ 34.942730] BUG: Bad rss-counter state mm:00000000a3416b28 type:MM_FILEPAGES val:33 [ 34.944000] BUG: Bad rss-counter state mm:00000000a3416b28 type:MM_ANONPAGES val:22 [ 35.413353] BUG: Bad rss-counter state mm:00000000f73f5af2 type:MM_FILEPAGES val:33 [ 35.414530] BUG: Bad rss-counter state mm:00000000f73f5af2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14774' (ECDSA) to the list of known hosts. 2023/06/19 13:56:48 fuzzer started 2023/06/19 13:56:48 dialing manager at localhost:44161 2023/06/19 13:56:48 checking machine... 2023/06/19 13:56:48 checking revisions... [ 36.203021] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:56:48 testing simple program... [ 36.244632] cgroup: Unknown subsys name 'net' [ 36.296885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:56:46 Registers: info registers vcpu 0 RAX=ffffffff81809911 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e28 RDI=ffff88806ce09e28 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860d0c2a R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09e30 R15=ffff88806ce09a70 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007feea2bf4900 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=000055be7a236768 CR3=0000000019eca000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffde5733ba8 CR3=0000000019d1e000 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=36353a3331203931206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32303237332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323032 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000