syzkaller login: [ 35.396145] BUG: Bad rss-counter state mm:00000000a6f6bf43 type:MM_FILEPAGES val:33 [ 35.397412] BUG: Bad rss-counter state mm:00000000a6f6bf43 type:MM_ANONPAGES val:22 [ 35.449980] ================================================================== [ 35.450811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.451706] Read of size 8 at addr ffff888014741880 by task sshd/219 [ 35.452425] [ 35.452620] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.453429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.454331] Call Trace: [ 35.454736] [ 35.455024] dump_stack_lvl+0x91/0xf0 [ 35.455430] print_report+0xcc/0x620 [ 35.455746] ? __virt_addr_valid+0x102/0x340 [ 35.456120] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.456533] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.456949] kasan_report+0xbe/0xf0 [ 35.457258] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.457670] vma_interval_tree_remove+0xc75/0xec0 [ 35.458073] vma_prepare+0xc54/0x11a0 [ 35.458391] __split_vma+0x5af/0x950 [ 35.458705] ? __pfx___split_vma+0x10/0x10 [ 35.459052] ? find_held_lock+0x2c/0x110 [ 35.459404] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.459773] ? lock_is_held_type+0x9f/0x120 [ 35.460127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.460529] ? mtree_range_walk+0x632/0x900 [ 35.460891] ? mas_walk+0x5c7/0x7c0 [ 35.461198] do_vmi_munmap+0x1f1/0x2b0 [ 35.461527] mmap_region+0x1f9/0x2660 [ 35.461843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.462182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.462662] ? __pfx_lock_acquire+0x10/0x10 [ 35.463015] ? __pfx_mmap_region+0x10/0x10 [ 35.463376] ? security_mmap_addr+0x7d/0xa0 [ 35.463728] ? get_unmapped_area+0x1f5/0x3f0 [ 35.464091] do_mmap+0x854/0xf00 [ 35.464375] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.464702] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.465073] ksys_mmap_pgoff+0x3af/0x500 [ 35.465406] do_syscall_64+0x3f/0x90 [ 35.465727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.466157] RIP: 0033:0x7f8885f51d82 [ 35.466460] 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 [ 35.467901] RSP: 002b:00007ffdf591ac78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.468515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8885f51d82 [ 35.469084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f888538b000 [ 35.469656] RBP: 00007f888538b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.470226] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557104198ec0 [ 35.470793] R13: 00007ffdf591ac90 R14: 00007ffdf591acc0 R15: 00007ffdf591b020 [ 35.471383] [ 35.471576] [ 35.471714] Allocated by task 212: [ 35.472000] kasan_save_stack+0x22/0x50 [ 35.472341] kasan_set_track+0x25/0x30 [ 35.472665] __kasan_slab_alloc+0x59/0x70 [ 35.473011] kmem_cache_alloc+0x16b/0x370 [ 35.473354] vm_area_dup+0x20/0x160 [ 35.473651] __split_vma+0x170/0x950 [ 35.473956] split_vma+0xc6/0x110 [ 35.474249] mprotect_fixup+0x8d2/0xb30 [ 35.474585] do_mprotect_pkey+0x87e/0xd40 [ 35.474931] __x64_sys_mprotect+0x78/0xc0 [ 35.475273] do_syscall_64+0x3f/0x90 [ 35.475590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.476007] [ 35.476145] Freed by task 212: [ 35.476396] kasan_save_stack+0x22/0x50 [ 35.476717] kasan_set_track+0x25/0x30 [ 35.476974] kasan_save_free_info+0x2b/0x50 [ 35.477243] __kasan_slab_free+0x10a/0x190 [ 35.477512] kmem_cache_free+0x10d/0x4d0 [ 35.477767] rcu_core+0x8c8/0x2860 [ 35.477992] __do_softirq+0x1b7/0x7d4 [ 35.478242] [ 35.478374] Last potentially related work creation: [ 35.478719] kasan_save_stack+0x22/0x50 [ 35.478975] __kasan_record_aux_stack+0x8e/0xa0 [ 35.479263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.479605] remove_vma+0x139/0x170 [ 35.479832] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.480113] do_vmi_munmap+0x1f1/0x2b0 [ 35.480357] __vm_munmap+0x138/0x3a0 [ 35.480592] __x64_sys_munmap+0x59/0x80 [ 35.480840] do_syscall_64+0x3f/0x90 [ 35.481079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.481405] [ 35.481515] Second to last potentially related work creation: [ 35.481856] kasan_save_stack+0x22/0x50 [ 35.482110] __kasan_record_aux_stack+0x8e/0xa0 [ 35.482398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.482720] remove_vma+0x139/0x170 [ 35.482948] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.483228] do_vmi_munmap+0x1f1/0x2b0 [ 35.483480] mmap_region+0x1f9/0x2660 [ 35.483721] do_mmap+0x854/0xf00 [ 35.483938] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.484186] ksys_mmap_pgoff+0x3af/0x500 [ 35.484443] do_syscall_64+0x3f/0x90 [ 35.484682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.485004] [ 35.485114] The buggy address belongs to the object at ffff888014741828 [ 35.485114] which belongs to the cache vm_area_struct of size 168 [ 35.485843] The buggy address is located 88 bytes inside of [ 35.485843] freed 168-byte region [ffff888014741828, ffff8880147418d0) [ 35.486546] [ 35.486656] The buggy address belongs to the physical page: [ 35.486991] page:00000000ce9214ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14741 [ 35.487559] memcg:ffff888013f43601 [ 35.487778] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.488107] page_type: 0xffffffff() [ 35.488341] raw: 0100000000000200 ffff88800879fc80 ffffea00002530c0 dead000000000004 [ 35.488811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f43601 [ 35.489271] page dumped because: kasan: bad access detected [ 35.489604] [ 35.489713] Memory state around the buggy address: [ 35.490009] ffff888014741780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.490441] ffff888014741800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.490879] >ffff888014741880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.491325] ^ [ 35.491542] ffff888014741900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.491974] ffff888014741980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 35.492403] ================================================================== [ 35.492909] Disabling lock debugging due to kernel taint [ 36.866597] BUG: Bad rss-counter state mm:000000009c908063 type:MM_FILEPAGES val:33 [ 36.868010] BUG: Bad rss-counter state mm:000000009c908063 type:MM_ANONPAGES val:22 [ 37.268167] BUG: Bad rss-counter state mm:0000000072b804c5 type:MM_FILEPAGES val:33 [ 37.269277] BUG: Bad rss-counter state mm:0000000072b804c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33619' (ECDSA) to the list of known hosts. 2023/06/19 18:53:33 fuzzer started 2023/06/19 18:53:33 dialing manager at localhost:44161 2023/06/19 18:53:33 checking machine... 2023/06/19 18:53:33 checking revisions... [ 38.027773] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:53:33 testing simple program... [ 38.079650] cgroup: Unknown subsys name 'net' [ 38.116728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:53:21 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7fc01 RSI=ffff888008d7fce0 RDI=ffff888008d7f988 RBP=ffff888008d7f9d0 RSP=ffff888008d7f8f0 R8 =ffffffff86137dd6 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008d7f9d8 R13=ffff888008d78000 R14=ffff888008d7fce8 R15=ffff888008d7f978 RIP=ffffffff811304d1 RFL=00000286 [--S--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 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=00007f77924cd0b0 CR3=000000000e516000 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=33353a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fddb080fc70 CR3=000000000c562000 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=9bb18af9e1dd4bba064feac0f5c472dc XMM02=000000000011d9f8ec2efd57dc4c00df XMM03=0000000000123ce0f792bebb16f4da67 XMM04=a65b7bfbfd64bd7800000000000ae988 XMM05=1a22511f85f587020000000000135d40 XMM06=806171799158d96700000000001347a0 XMM07=e042d86d42eb936e0000000000123fb8 XMM08=f792bebb16f4da67000000000011da58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000