syzkaller login: [ 31.082308] BUG: Bad rss-counter state mm:00000000d478ae68 type:MM_FILEPAGES val:33 [ 31.083851] BUG: Bad rss-counter state mm:00000000d478ae68 type:MM_ANONPAGES val:22 [ 31.248778] ================================================================== [ 31.249723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250690] Read of size 8 at addr ffff88800e445c20 by task sshd/219 [ 31.251565] [ 31.251791] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252687] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253728] Call Trace: [ 31.254063] [ 31.254353] dump_stack_lvl+0x91/0xf0 [ 31.254883] print_report+0xcc/0x620 [ 31.255382] ? __virt_addr_valid+0x102/0x340 [ 31.255956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257239] kasan_report+0xbe/0xf0 [ 31.257729] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258373] vma_interval_tree_remove+0xc75/0xec0 [ 31.259029] vma_prepare+0xc54/0x11a0 [ 31.259528] __split_vma+0x5af/0x950 [ 31.260021] ? __pfx___split_vma+0x10/0x10 [ 31.260574] ? find_held_lock+0x2c/0x110 [ 31.261117] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.261698] ? lock_is_held_type+0x9f/0x120 [ 31.262262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262900] ? mtree_range_walk+0x632/0x900 [ 31.263474] ? mas_walk+0x5c7/0x7c0 [ 31.263968] do_vmi_munmap+0x1f1/0x2b0 [ 31.264481] mmap_region+0x1f9/0x2660 [ 31.264981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.266262] ? __pfx_lock_acquire+0x10/0x10 [ 31.266829] ? __pfx_mmap_region+0x10/0x10 [ 31.267389] ? security_mmap_addr+0x7d/0xa0 [ 31.267943] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268513] do_mmap+0x854/0xf00 [ 31.268971] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.270060] ksys_mmap_pgoff+0x3af/0x500 [ 31.270589] do_syscall_64+0x3f/0x90 [ 31.271102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271776] RIP: 0033:0x7f0627165d82 [ 31.272254] 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 [ 31.274480] RSP: 002b:00007ffd8a8a6f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0627165d82 [ 31.276339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f062659f000 [ 31.277235] RBP: 00007f062659f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278125] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557f1a02ec0 [ 31.279011] R13: 00007ffd8a8a6f80 R14: 00007ffd8a8a6fb0 R15: 00007ffd8a8a7310 [ 31.279909] [ 31.280211] [ 31.280434] Allocated by task 212: [ 31.280875] kasan_save_stack+0x22/0x50 [ 31.281399] kasan_set_track+0x25/0x30 [ 31.281912] __kasan_slab_alloc+0x59/0x70 [ 31.282458] kmem_cache_alloc+0x16b/0x370 [ 31.283002] vm_area_dup+0x20/0x160 [ 31.283472] __split_vma+0x170/0x950 [ 31.283954] split_vma+0xc6/0x110 [ 31.284411] mprotect_fixup+0x8d2/0xb30 [ 31.284932] do_mprotect_pkey+0x87e/0xd40 [ 31.285472] __x64_sys_mprotect+0x78/0xc0 [ 31.286012] do_syscall_64+0x3f/0x90 [ 31.286506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287193] [ 31.287414] Freed by task 212: [ 31.287825] kasan_save_stack+0x22/0x50 [ 31.288352] kasan_set_track+0x25/0x30 [ 31.288864] kasan_save_free_info+0x2b/0x50 [ 31.289416] __kasan_slab_free+0x10a/0x190 [ 31.289973] kmem_cache_free+0x10d/0x4d0 [ 31.290511] rcu_core+0x8c8/0x2860 [ 31.290976] __do_softirq+0x1b7/0x7d4 [ 31.291471] [ 31.291689] Last potentially related work creation: [ 31.292307] kasan_save_stack+0x22/0x50 [ 31.292825] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294091] remove_vma+0x139/0x170 [ 31.294559] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295148] do_vmi_munmap+0x1f1/0x2b0 [ 31.295654] __vm_munmap+0x138/0x3a0 [ 31.296136] __x64_sys_munmap+0x59/0x80 [ 31.296650] do_syscall_64+0x3f/0x90 [ 31.297140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297811] [ 31.298029] Second to last potentially related work creation: [ 31.298743] kasan_save_stack+0x22/0x50 [ 31.299290] __kasan_record_aux_stack+0x8e/0xa0 [ 31.299881] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300548] remove_vma+0x139/0x170 [ 31.301017] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301589] do_vmi_munmap+0x1f1/0x2b0 [ 31.302087] mmap_region+0x1f9/0x2660 [ 31.302587] do_mmap+0x854/0xf00 [ 31.303039] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.303544] ksys_mmap_pgoff+0x3af/0x500 [ 31.304062] do_syscall_64+0x3f/0x90 [ 31.304554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305228] [ 31.305453] The buggy address belongs to the object at ffff88800e445bc8 [ 31.305453] which belongs to the cache vm_area_struct of size 168 [ 31.306986] The buggy address is located 88 bytes inside of [ 31.306986] freed 168-byte region [ffff88800e445bc8, ffff88800e445c70) [ 31.308449] [ 31.308668] The buggy address belongs to the physical page: [ 31.309348] page:0000000033d17189 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe445 [ 31.310476] memcg:ffff88800f6e1701 [ 31.310932] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.311606] page_type: 0xffffffff() [ 31.312071] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395740 dead000000000002 [ 31.313028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6e1701 [ 31.313982] page dumped because: kasan: bad access detected [ 31.314678] [ 31.314911] Memory state around the buggy address: [ 31.315514] ffff88800e445b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.316413] ffff88800e445b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.317300] >ffff88800e445c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.318184] ^ [ 31.318730] ffff88800e445c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.319639] ffff88800e445d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.320520] ================================================================== [ 31.321525] Disabling lock debugging due to kernel taint [ 33.582355] BUG: Bad rss-counter state mm:00000000c3c439ac type:MM_FILEPAGES val:33 [ 33.583463] BUG: Bad rss-counter state mm:00000000c3c439ac type:MM_ANONPAGES val:22 [ 34.183793] BUG: Bad rss-counter state mm:00000000c0dc614d type:MM_FILEPAGES val:33 [ 34.185005] BUG: Bad rss-counter state mm:00000000c0dc614d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28393' (ECDSA) to the list of known hosts. 2023/06/21 07:50:36 fuzzer started 2023/06/21 07:50:36 dialing manager at localhost:36067 2023/06/21 07:50:36 checking machine... 2023/06/21 07:50:36 checking revisions... [ 34.841478] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:50:37 testing simple program... [ 34.893244] cgroup: Unknown subsys name 'net' [ 34.933632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1329 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] 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 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=0000562bf36dee58 CR3=000000000e3ca000 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=2036333a30353a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015c47f58 RCX=1ffff11002b88ff9 RDX=0000000000000000 RSI=0000000000080002 RDI=0000000000000001 RBP=ffff888015c47f48 RSP=ffff888015c47ee8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=00000000ffffffea R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8363b491 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 00007f9cf0ddf900 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=00007f9cf1394650 CR3=0000000016a9a000 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