syzkaller login: [ 38.830507] BUG: Bad rss-counter state mm:000000003a5df9df type:MM_FILEPAGES val:33 [ 38.831693] BUG: Bad rss-counter state mm:000000003a5df9df type:MM_ANONPAGES val:22 [ 38.872823] ================================================================== [ 38.873796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.874779] Read of size 8 at addr ffff88800970f058 by task sshd/218 [ 38.875685] [ 38.875916] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.876826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.877879] Call Trace: [ 38.878211] [ 38.878507] dump_stack_lvl+0x91/0xf0 [ 38.879030] print_report+0xcc/0x620 [ 38.879537] ? __virt_addr_valid+0x102/0x340 [ 38.880112] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880766] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881413] kasan_report+0xbe/0xf0 [ 38.881913] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882590] vma_interval_tree_remove+0xc75/0xec0 [ 38.883253] vma_prepare+0xc54/0x11a0 [ 38.883768] __split_vma+0x5af/0x950 [ 38.884300] ? __pfx___split_vma+0x10/0x10 [ 38.884889] ? find_held_lock+0x2c/0x110 [ 38.885448] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.886058] ? lock_is_held_type+0x9f/0x120 [ 38.886661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.887330] ? mtree_range_walk+0x632/0x900 [ 38.887937] ? mas_walk+0x5c7/0x7c0 [ 38.888480] do_vmi_munmap+0x1f1/0x2b0 [ 38.889024] mmap_region+0x1f9/0x2660 [ 38.889561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.890129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.890925] ? __pfx_lock_acquire+0x10/0x10 [ 38.891526] ? __pfx_mmap_region+0x10/0x10 [ 38.892121] ? security_mmap_addr+0x7d/0xa0 [ 38.892742] ? get_unmapped_area+0x1f5/0x3f0 [ 38.893358] do_mmap+0x854/0xf00 [ 38.893851] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.894408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.895037] ksys_mmap_pgoff+0x3af/0x500 [ 38.895596] do_syscall_64+0x3f/0x90 [ 38.896130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896877] RIP: 0033:0x7fc5a478ed82 [ 38.897395] 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 [ 38.899812] RSP: 002b:00007fff5f737fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.900810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5a478ed82 [ 38.901766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5a3bc8000 [ 38.902725] RBP: 00007fc5a3bc8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.903686] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9e7a92ec0 [ 38.904641] R13: 00007fff5f737fe0 R14: 00007fff5f738010 R15: 00007fff5f738370 [ 38.905612] [ 38.905941] [ 38.906186] Allocated by task 211: [ 38.906658] kasan_save_stack+0x22/0x50 [ 38.907220] kasan_set_track+0x25/0x30 [ 38.907766] __kasan_slab_alloc+0x59/0x70 [ 38.908356] kmem_cache_alloc+0x16b/0x370 [ 38.908938] vm_area_dup+0x20/0x160 [ 38.909436] __split_vma+0x170/0x950 [ 38.909957] split_vma+0xc6/0x110 [ 38.910458] mprotect_fixup+0x8d2/0xb30 [ 38.911029] do_mprotect_pkey+0x87e/0xd40 [ 38.911610] __x64_sys_mprotect+0x78/0xc0 [ 38.912199] do_syscall_64+0x3f/0x90 [ 38.912735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913443] [ 38.913688] Freed by task 19: [ 38.914106] kasan_save_stack+0x22/0x50 [ 38.914674] kasan_set_track+0x25/0x30 [ 38.915233] kasan_save_free_info+0x2b/0x50 [ 38.915831] __kasan_slab_free+0x10a/0x190 [ 38.916443] kmem_cache_free+0x10d/0x4d0 [ 38.917029] rcu_core+0x8c8/0x2860 [ 38.917528] __do_softirq+0x1b7/0x7d4 [ 38.918065] [ 38.918312] Last potentially related work creation: [ 38.918967] kasan_save_stack+0x22/0x50 [ 38.919542] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.920933] remove_vma+0x139/0x170 [ 38.921432] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922062] do_vmi_munmap+0x1f1/0x2b0 [ 38.922607] __vm_munmap+0x138/0x3a0 [ 38.923132] __x64_sys_munmap+0x59/0x80 [ 38.923692] do_syscall_64+0x3f/0x90 [ 38.924221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924951] [ 38.925193] The buggy address belongs to the object at ffff88800970f000 [ 38.925193] which belongs to the cache vm_area_struct of size 168 [ 38.926844] The buggy address is located 88 bytes inside of [ 38.926844] freed 168-byte region [ffff88800970f000, ffff88800970f0a8) [ 38.928423] [ 38.928667] The buggy address belongs to the physical page: [ 38.929406] page:00000000409f1f44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x970f [ 38.930608] memcg:ffff888009400b01 [ 38.931088] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.931805] page_type: 0xffffffff() [ 38.932437] raw: 0100000000000200 ffff88800879fc80 ffffea000037d0c0 dead000000000002 [ 38.933581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009400b01 [ 38.934701] page dumped because: kasan: bad access detected [ 38.935505] [ 38.935769] Memory state around the buggy address: [ 38.936505] ffff88800970ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.937464] ffff88800970ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.938335] >ffff88800970f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.939193] ^ [ 38.939943] ffff88800970f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.940832] ffff88800970f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.941717] ================================================================== [ 38.942823] Disabling lock debugging due to kernel taint [ 40.906921] BUG: Bad rss-counter state mm:00000000603766a4 type:MM_FILEPAGES val:33 [ 40.908438] BUG: Bad rss-counter state mm:00000000603766a4 type:MM_ANONPAGES val:22 [ 41.391601] BUG: Bad rss-counter state mm:000000003cb06d4d type:MM_FILEPAGES val:33 [ 41.392662] BUG: Bad rss-counter state mm:000000003cb06d4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54471' (ECDSA) to the list of known hosts. 2023/06/20 02:06:24 fuzzer started 2023/06/20 02:06:24 dialing manager at localhost:44161 2023/06/20 02:06:24 checking machine... 2023/06/20 02:06:24 checking revisions... [ 42.135709] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:06:24 testing simple program... [ 42.202698] cgroup: Unknown subsys name 'net' [ 42.252493] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:06:24 Registers: info registers vcpu 0 RAX=ffffffff860d68fb RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85dbc1cc RBP=ffff888016e979f8 RSP=ffff888016e97930 R8 =ffffffff860d68c0 R9 =ffff888016e979e0 R10=0000000000038001 R11=0000000000010b7e R12=ffff888016e97a00 R13=ffff888016e979e8 R14=ffff888016e979e1 R15=ffff888016e979a0 RIP=ffffffff81130a7b RFL=00000202 [-------] 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 00007f7db532a900 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=00007f7db58e20b0 CR3=0000000016852000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b523e RBX=0000000000000002 RCX=ffffffff8450b05d RDX=00000000000b5250 RSI=00000000000350b0 RDI=000000000021f6f0 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff864b1140 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130859 RFL=00000283 [--S---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 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=00007f40e25d9030 CR3=000000000eb88000 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=2033323a36303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a36303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000