syzkaller login: [ 34.050218] BUG: Bad rss-counter state mm:00000000a692cc91 type:MM_FILEPAGES val:33 [ 34.050912] BUG: Bad rss-counter state mm:00000000a692cc91 type:MM_ANONPAGES val:22 [ 34.185746] ================================================================== [ 34.186377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.187001] Read of size 8 at addr ffff88800fbdded8 by task sshd/220 [ 34.187496] [ 34.187679] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.188278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.188908] Call Trace: [ 34.189121] [ 34.189314] dump_stack_lvl+0x91/0xf0 [ 34.189625] print_report+0xcc/0x620 [ 34.189943] ? __virt_addr_valid+0x102/0x340 [ 34.190495] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.190900] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.191308] kasan_report+0xbe/0xf0 [ 34.191621] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.192054] vma_interval_tree_remove+0xc75/0xec0 [ 34.192475] vma_prepare+0xc54/0x11a0 [ 34.192811] __split_vma+0x5af/0x950 [ 34.193130] ? __pfx___split_vma+0x10/0x10 [ 34.193489] ? find_held_lock+0x2c/0x110 [ 34.193837] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.194221] ? lock_is_held_type+0x9f/0x120 [ 34.194612] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.195029] ? mtree_range_walk+0x632/0x900 [ 34.195396] ? mas_walk+0x5c7/0x7c0 [ 34.195760] do_vmi_munmap+0x1f1/0x2b0 [ 34.196138] mmap_region+0x1f9/0x2660 [ 34.196482] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.196830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.197312] ? __pfx_lock_acquire+0x10/0x10 [ 34.197682] ? __pfx_mmap_region+0x10/0x10 [ 34.198058] ? security_mmap_addr+0x7d/0xa0 [ 34.198423] ? get_unmapped_area+0x1f5/0x3f0 [ 34.198800] do_mmap+0x854/0xf00 [ 34.199089] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.199429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.199843] ksys_mmap_pgoff+0x3af/0x500 [ 34.200186] do_syscall_64+0x3f/0x90 [ 34.200528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.201042] RIP: 0033:0x7f9ad4f66d82 [ 34.201357] 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 [ 34.202787] RSP: 002b:00007fffc1971318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.203453] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ad4f66d82 [ 34.204069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ad43a0000 [ 34.204655] RBP: 00007f9ad43a0000 R08: 0000000000000009 R09: 0000000000001000 [ 34.205257] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d1fa09ec0 [ 34.205817] R13: 00007fffc1971330 R14: 00007fffc1971360 R15: 00007fffc19716c0 [ 34.206386] [ 34.206604] [ 34.206762] Allocated by task 213: [ 34.207071] kasan_save_stack+0x22/0x50 [ 34.207418] kasan_set_track+0x25/0x30 [ 34.207750] __kasan_slab_alloc+0x59/0x70 [ 34.208161] kmem_cache_alloc+0x16b/0x370 [ 34.208526] vm_area_dup+0x20/0x160 [ 34.208877] __split_vma+0x170/0x950 [ 34.209182] split_vma+0xc6/0x110 [ 34.209466] mprotect_fixup+0x8d2/0xb30 [ 34.209789] do_mprotect_pkey+0x87e/0xd40 [ 34.210163] __x64_sys_mprotect+0x78/0xc0 [ 34.210535] do_syscall_64+0x3f/0x90 [ 34.210848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.211268] [ 34.211410] Freed by task 19: [ 34.211670] kasan_save_stack+0x22/0x50 [ 34.212041] kasan_set_track+0x25/0x30 [ 34.212381] kasan_save_free_info+0x2b/0x50 [ 34.212716] __kasan_slab_free+0x10a/0x190 [ 34.213051] kmem_cache_free+0x10d/0x4d0 [ 34.213396] rcu_core+0x8c8/0x2860 [ 34.213761] __do_softirq+0x1b7/0x7d4 [ 34.214078] [ 34.214222] Last potentially related work creation: [ 34.214608] kasan_save_stack+0x22/0x50 [ 34.214943] __kasan_record_aux_stack+0x8e/0xa0 [ 34.215309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.215730] remove_vma+0x139/0x170 [ 34.216065] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.216416] do_vmi_munmap+0x1f1/0x2b0 [ 34.216735] __vm_munmap+0x138/0x3a0 [ 34.217058] __x64_sys_munmap+0x59/0x80 [ 34.217401] do_syscall_64+0x3f/0x90 [ 34.217721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.218139] [ 34.218297] The buggy address belongs to the object at ffff88800fbdde80 [ 34.218297] which belongs to the cache vm_area_struct of size 168 [ 34.219402] The buggy address is located 88 bytes inside of [ 34.219402] freed 168-byte region [ffff88800fbdde80, ffff88800fbddf28) [ 34.220409] [ 34.220550] The buggy address belongs to the physical page: [ 34.220968] page:0000000099b7fbba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbdd [ 34.221668] memcg:ffff88800d8a3001 [ 34.221951] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.222375] page_type: 0xffffffff() [ 34.222679] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.223290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8a3001 [ 34.223916] page dumped because: kasan: bad access detected [ 34.224374] [ 34.224516] Memory state around the buggy address: [ 34.224934] ffff88800fbddd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.225482] ffff88800fbdde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.226059] >ffff88800fbdde80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.226643] ^ [ 34.227147] ffff88800fbddf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.227708] ffff88800fbddf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.228294] ================================================================== [ 34.228986] Disabling lock debugging due to kernel taint [ 36.030508] BUG: Bad rss-counter state mm:0000000043aac2d0 type:MM_FILEPAGES val:33 [ 36.031196] BUG: Bad rss-counter state mm:0000000043aac2d0 type:MM_ANONPAGES val:22 [ 36.463356] BUG: Bad rss-counter state mm:000000007e1bd524 type:MM_FILEPAGES val:33 [ 36.464103] BUG: Bad rss-counter state mm:000000007e1bd524 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4270' (ECDSA) to the list of known hosts. 2023/06/20 09:50:55 fuzzer started 2023/06/20 09:50:55 dialing manager at localhost:44161 2023/06/20 09:50:55 checking machine... 2023/06/20 09:50:55 checking revisions... [ 37.028041] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:50:55 testing simple program... [ 37.074570] cgroup: Unknown subsys name 'net' [ 37.104048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:52 Registers: info registers vcpu 0 RAX=ffffffff81847452 RBX=ffffffff813ad420 RCX=ffffffff8613da01 RDX=1ffff1100378bf47 RSI=ffffffff81847452 RDI=ffff88801bc5faa8 RBP=ffff88801bc5fa78 RSP=ffff88801bc5f9d0 R8 =ffffffff8613daa0 R9 =ffff88801bc5fa20 R10=0000000000038001 R11=0000000000021e78 R12=ffff88801bc5faa8 R13=0000000000000000 R14=ffff88801596d1c0 R15=ffff88800982fe40 RIP=ffffffff84532446 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 00007f8c40eea900 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=00007f8c414a1618 CR3=0000000019f92000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f729fe194d0 CR3=0000000009d0c000 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=d45a264c30413a9a27483e66a97ca421 XMM02=ec2efd57dc4c00df000000000011d000 XMM03=f94ae2eed3a0e47f000000000011d0d0 XMM04=bdd285751779109f00000000000ae988 XMM05=f7a779927f939d1e00000000001345a8 XMM06=4fda316b135da52b0000000000133fa0 XMM07=e042d86d42eb936e0000000000124790 XMM08=f94ae2eed3a0e47f000000000011d0d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000