syzkaller login: [ 30.714840] BUG: Bad rss-counter state mm:000000009fa79c8f type:MM_FILEPAGES val:33 [ 30.716939] BUG: Bad rss-counter state mm:000000009fa79c8f type:MM_ANONPAGES val:22 [ 30.893389] ================================================================== [ 30.894628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.895865] Read of size 8 at addr ffff88800d39a140 by task sshd/218 [ 30.896732] [ 30.896985] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.897970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.899090] Call Trace: [ 30.899452] [ 30.899776] dump_stack_lvl+0x91/0xf0 [ 30.900347] print_report+0xcc/0x620 [ 30.900900] ? __virt_addr_valid+0x102/0x340 [ 30.901528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.902244] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.902945] kasan_report+0xbe/0xf0 [ 30.903481] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.904185] vma_interval_tree_remove+0xc75/0xec0 [ 30.904868] vma_prepare+0xc54/0x11a0 [ 30.905414] __split_vma+0x5af/0x950 [ 30.905945] ? __pfx___split_vma+0x10/0x10 [ 30.906556] ? find_held_lock+0x2c/0x110 [ 30.907155] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.907792] ? lock_is_held_type+0x9f/0x120 [ 30.908401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.909083] ? mtree_range_walk+0x632/0x900 [ 30.909707] ? mas_walk+0x5c7/0x7c0 [ 30.910261] do_vmi_munmap+0x1f1/0x2b0 [ 30.910819] mmap_region+0x1f9/0x2660 [ 30.911367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.911947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.912761] ? __pfx_lock_acquire+0x10/0x10 [ 30.913369] ? __pfx_mmap_region+0x10/0x10 [ 30.913965] ? security_mmap_addr+0x7d/0xa0 [ 30.914591] ? get_unmapped_area+0x1f5/0x3f0 [ 30.915212] do_mmap+0x854/0xf00 [ 30.915710] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.916273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.916913] ksys_mmap_pgoff+0x3af/0x500 [ 30.917495] do_syscall_64+0x3f/0x90 [ 30.918043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.918794] RIP: 0033:0x7f59a4d22d82 [ 30.919311] 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 [ 30.921704] RSP: 002b:00007ffc186e5058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.922738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59a4d22d82 [ 30.923701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59a415c000 [ 30.924663] RBP: 00007f59a415c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.925624] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603f16e5ec0 [ 30.926611] R13: 00007ffc186e5070 R14: 00007ffc186e50a0 R15: 00007ffc186e5400 [ 30.927578] [ 30.927908] [ 30.928149] Allocated by task 211: [ 30.928635] kasan_save_stack+0x22/0x50 [ 30.929207] kasan_set_track+0x25/0x30 [ 30.929761] __kasan_slab_alloc+0x59/0x70 [ 30.930353] kmem_cache_alloc+0x16b/0x370 [ 30.930932] vm_area_dup+0x20/0x160 [ 30.931450] __split_vma+0x170/0x950 [ 30.931982] split_vma+0xc6/0x110 [ 30.932475] mprotect_fixup+0x8d2/0xb30 [ 30.933036] do_mprotect_pkey+0x87e/0xd40 [ 30.933625] __x64_sys_mprotect+0x78/0xc0 [ 30.934210] do_syscall_64+0x3f/0x90 [ 30.934763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.935486] [ 30.935730] Freed by task 211: [ 30.936174] kasan_save_stack+0x22/0x50 [ 30.936733] kasan_set_track+0x25/0x30 [ 30.937286] kasan_save_free_info+0x2b/0x50 [ 30.937877] __kasan_slab_free+0x10a/0x190 [ 30.938484] kmem_cache_free+0x10d/0x4d0 [ 30.939072] rcu_core+0x8c8/0x2860 [ 30.939580] __do_softirq+0x1b7/0x7d4 [ 30.940121] [ 30.940364] Last potentially related work creation: [ 30.941018] kasan_save_stack+0x22/0x50 [ 30.941584] __kasan_record_aux_stack+0x8e/0xa0 [ 30.942230] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.942970] remove_vma+0x139/0x170 [ 30.943483] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.944113] do_vmi_munmap+0x1f1/0x2b0 [ 30.944667] __vm_munmap+0x138/0x3a0 [ 30.945197] __x64_sys_munmap+0x59/0x80 [ 30.945759] do_syscall_64+0x3f/0x90 [ 30.946317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.947048] [ 30.947292] The buggy address belongs to the object at ffff88800d39a0e8 [ 30.947292] which belongs to the cache vm_area_struct of size 168 [ 30.948966] The buggy address is located 88 bytes inside of [ 30.948966] freed 168-byte region [ffff88800d39a0e8, ffff88800d39a190) [ 30.950640] [ 30.950890] The buggy address belongs to the physical page: [ 30.951634] page:00000000ebe51f15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd39a [ 30.952909] memcg:ffff88800d7eb901 [ 30.953410] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.954157] page_type: 0xffffffff() [ 30.954696] raw: 0100000000000200 ffff8880087a0c80 ffffea000038d2c0 dead000000000002 [ 30.955782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7eb901 [ 30.956828] page dumped because: kasan: bad access detected [ 30.957593] [ 30.957844] Memory state around the buggy address: [ 30.958545] ffff88800d39a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.959527] ffff88800d39a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.960492] >ffff88800d39a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.961453] ^ [ 30.962167] ffff88800d39a180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.963129] ffff88800d39a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.964112] ================================================================== [ 30.965305] Disabling lock debugging due to kernel taint [ 33.298799] BUG: Bad rss-counter state mm:00000000937b650a type:MM_FILEPAGES val:33 [ 33.300056] BUG: Bad rss-counter state mm:00000000937b650a type:MM_ANONPAGES val:22 [ 33.742202] BUG: Bad rss-counter state mm:00000000a582857c type:MM_FILEPAGES val:33 [ 33.743385] BUG: Bad rss-counter state mm:00000000a582857c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59064' (ECDSA) to the list of known hosts. 2023/06/21 10:06:27 fuzzer started 2023/06/21 10:06:27 dialing manager at localhost:36067 2023/06/21 10:06:28 checking machine... 2023/06/21 10:06:28 checking revisions... [ 34.545508] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:06:28 testing simple program... [ 34.597755] cgroup: Unknown subsys name 'net' [ 34.636882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:06:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888009bb1b40 RSI=ffffffff81eefd1f RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff8880146e79b0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff8880145b93c8 R14=0000000000000081 R15=ffff8880145b93ca RIP=ffffffff81eefd23 RFL=00000293 [--S-A-C] 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 00007fb6ce896900 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=00007fb6cdce8440 CR3=000000000caa8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5ce0150f4db748f400000000000ae988 XMM05=9ee396e2206e93730000000000131ad0 XMM06=751b9502027dc0b9000000000012feb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f760b903618 CR3=000000000c63e000 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=36303a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000