syzkaller login: [ 52.724457] BUG: Bad rss-counter state mm:00000000c0e3f27f type:MM_FILEPAGES val:33 [ 52.725800] BUG: Bad rss-counter state mm:00000000c0e3f27f type:MM_ANONPAGES val:22 [ 52.764198] ================================================================== [ 52.765161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.766192] Read of size 8 at addr ffff88801667a880 by task sshd/222 [ 52.766970] [ 52.767186] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.768052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.769019] Call Trace: [ 52.769341] [ 52.769627] dump_stack_lvl+0x91/0xf0 [ 52.770114] print_report+0xcc/0x620 [ 52.770591] ? __virt_addr_valid+0x102/0x340 [ 52.771152] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.771768] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.772384] kasan_report+0xbe/0xf0 [ 52.772856] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.773485] vma_interval_tree_remove+0xc75/0xec0 [ 52.774086] vma_prepare+0xc54/0x11a0 [ 52.774561] __split_vma+0x5af/0x950 [ 52.775043] ? __pfx___split_vma+0x10/0x10 [ 52.775573] ? find_held_lock+0x2c/0x110 [ 52.776096] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.776657] ? lock_is_held_type+0x9f/0x120 [ 52.777193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.777804] ? mtree_range_walk+0x632/0x900 [ 52.778348] ? mas_walk+0x5c7/0x7c0 [ 52.778836] do_vmi_munmap+0x1f1/0x2b0 [ 52.779325] mmap_region+0x1f9/0x2660 [ 52.779800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.780312] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.781015] ? __pfx_lock_acquire+0x10/0x10 [ 52.781542] ? __pfx_mmap_region+0x10/0x10 [ 52.782071] ? security_mmap_addr+0x7d/0xa0 [ 52.782604] ? get_unmapped_area+0x1f5/0x3f0 [ 52.783154] do_mmap+0x854/0xf00 [ 52.783590] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.784082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.784636] ksys_mmap_pgoff+0x3af/0x500 [ 52.785141] do_syscall_64+0x3f/0x90 [ 52.785612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.786252] RIP: 0033:0x7f816c1c6d82 [ 52.786701] 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 [ 52.788838] RSP: 002b:00007ffd2f0f0258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.789728] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f816c1c6d82 [ 52.790570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f816b600000 [ 52.791422] RBP: 00007f816b600000 R08: 0000000000000009 R09: 0000000000001000 [ 52.792259] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557591fd2ec0 [ 52.793093] R13: 00007ffd2f0f0270 R14: 00007ffd2f0f02a0 R15: 00007ffd2f0f0600 [ 52.793940] [ 52.794234] [ 52.794451] Allocated by task 214: [ 52.794885] kasan_save_stack+0x22/0x50 [ 52.795389] kasan_set_track+0x25/0x30 [ 52.795876] __kasan_slab_alloc+0x59/0x70 [ 52.796392] kmem_cache_alloc+0x16b/0x370 [ 52.796899] vm_area_dup+0x20/0x160 [ 52.797345] __split_vma+0x170/0x950 [ 52.797808] split_vma+0xc6/0x110 [ 52.798244] mprotect_fixup+0x8d2/0xb30 [ 52.798763] do_mprotect_pkey+0x87e/0xd40 [ 52.799280] __x64_sys_mprotect+0x78/0xc0 [ 52.799792] do_syscall_64+0x3f/0x90 [ 52.800267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.800898] [ 52.801110] Freed by task 19: [ 52.801488] kasan_save_stack+0x22/0x50 [ 52.801991] kasan_set_track+0x25/0x30 [ 52.802478] kasan_save_free_info+0x2b/0x50 [ 52.803019] __kasan_slab_free+0x10a/0x190 [ 52.803543] kmem_cache_free+0x10d/0x4d0 [ 52.804046] rcu_core+0x8c8/0x2860 [ 52.804485] __do_softirq+0x1b7/0x7d4 [ 52.804964] [ 52.805181] Last potentially related work creation: [ 52.805757] kasan_save_stack+0x22/0x50 [ 52.806256] __kasan_record_aux_stack+0x8e/0xa0 [ 52.806832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.807468] remove_vma+0x139/0x170 [ 52.807913] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.808465] do_vmi_munmap+0x1f1/0x2b0 [ 52.808948] __vm_munmap+0x138/0x3a0 [ 52.809422] __x64_sys_munmap+0x59/0x80 [ 52.809911] do_syscall_64+0x3f/0x90 [ 52.810378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.811034] [ 52.811250] The buggy address belongs to the object at ffff88801667a828 [ 52.811250] which belongs to the cache vm_area_struct of size 168 [ 52.812719] The buggy address is located 88 bytes inside of [ 52.812719] freed 168-byte region [ffff88801667a828, ffff88801667a8d0) [ 52.814110] [ 52.814322] The buggy address belongs to the physical page: [ 52.814989] page:00000000ff463960 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1667a [ 52.816074] memcg:ffff88800f719201 [ 52.816495] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.817131] page_type: 0xffffffff() [ 52.817574] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.818486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f719201 [ 52.819436] page dumped because: kasan: bad access detected [ 52.820107] [ 52.820330] Memory state around the buggy address: [ 52.820915] ffff88801667a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 52.821778] ffff88801667a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 52.822653] >ffff88801667a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 52.823511] ^ [ 52.823928] ffff88801667a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.824782] ffff88801667a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 52.825647] ================================================================== [ 52.826705] Disabling lock debugging due to kernel taint [ 54.730842] BUG: Bad rss-counter state mm:00000000aa484652 type:MM_FILEPAGES val:33 [ 54.732474] BUG: Bad rss-counter state mm:00000000aa484652 type:MM_ANONPAGES val:22 [ 55.244098] BUG: Bad rss-counter state mm:00000000fb993a39 type:MM_FILEPAGES val:33 [ 55.245263] BUG: Bad rss-counter state mm:00000000fb993a39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16849' (ECDSA) to the list of known hosts. 2023/06/19 13:21:25 fuzzer started 2023/06/19 13:21:25 dialing manager at localhost:44161 2023/06/19 13:21:25 checking machine... 2023/06/19 13:21:25 checking revisions... [ 55.947231] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:21:25 testing simple program... [ 55.994128] cgroup: Unknown subsys name 'net' [ 56.042593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:21:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1355 RSI=ffff88806ce09fe0 RDI=ffff88806ce09aa8 RBP=ffff88806ce09fe0 RSP=ffff88806ce099f0 R8 =ffffffff864b4f3c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff8113046e 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 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=00007f2671f71680 CR3=000000000c65e000 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=2034323a31323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31323a3331203931 XMM08=203a637661273d67736d2030733a745f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000293 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888009d041d0 RBP=ffffffff8452fffc RSP=ffff88801474f740 R8 =0000000000000000 R9 =ffffed10013a083a R10=ffff888009d041d3 R11=0000000000000000 R12=ffff888009d041b8 R13=ffff88801474f8a0 R14=ffff888019db5780 R15=0000000000000293 RIP=ffffffff81534237 RFL=00000002 [-------] 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 00007f3eeea0c900 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=00007fffaa39e000 CR3=000000000f67a000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000