syzkaller login: [ 56.123475] BUG: Bad rss-counter state mm:00000000e098c0f2 type:MM_FILEPAGES val:33 [ 56.125304] BUG: Bad rss-counter state mm:00000000e098c0f2 type:MM_ANONPAGES val:22 [ 56.286742] ================================================================== [ 56.287824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.289113] Read of size 8 at addr ffff88800ca1ac20 by task sshd/224 [ 56.290070] [ 56.290325] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.291379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.292492] Call Trace: [ 56.292823] [ 56.293112] dump_stack_lvl+0x91/0xf0 [ 56.293815] print_report+0xcc/0x620 [ 56.294358] ? __virt_addr_valid+0x102/0x340 [ 56.294902] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.295528] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.296135] kasan_report+0xbe/0xf0 [ 56.296626] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.297236] vma_interval_tree_remove+0xc75/0xec0 [ 56.297845] vma_prepare+0xc54/0x11a0 [ 56.298322] __split_vma+0x5af/0x950 [ 56.298789] ? __pfx___split_vma+0x10/0x10 [ 56.299324] ? find_held_lock+0x2c/0x110 [ 56.299842] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.300404] ? lock_is_held_type+0x9f/0x120 [ 56.300949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.301545] ? mtree_range_walk+0x632/0x900 [ 56.302082] ? mas_walk+0x5c7/0x7c0 [ 56.302546] do_vmi_munmap+0x1f1/0x2b0 [ 56.303021] mmap_region+0x1f9/0x2660 [ 56.303495] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.304009] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.304708] ? __pfx_lock_acquire+0x10/0x10 [ 56.305233] ? __pfx_mmap_region+0x10/0x10 [ 56.305750] ? security_mmap_addr+0x7d/0xa0 [ 56.306267] ? get_unmapped_area+0x1f5/0x3f0 [ 56.306798] do_mmap+0x854/0xf00 [ 56.307227] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.307710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.308259] ksys_mmap_pgoff+0x3af/0x500 [ 56.308764] do_syscall_64+0x3f/0x90 [ 56.309240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.309869] RIP: 0033:0x7fe8b31f2d82 [ 56.310327] 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 [ 56.312416] RSP: 002b:00007fffa4e1f898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.313320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8b31f2d82 [ 56.314172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8b262c000 [ 56.315017] RBP: 00007fe8b262c000 R08: 0000000000000009 R09: 0000000000001000 [ 56.315863] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560ae03fd90 [ 56.316727] R13: 00007fffa4e1f8b0 R14: 00007fffa4e1f8e0 R15: 00007fffa4e1fc40 [ 56.317588] [ 56.317881] [ 56.318097] Allocated by task 217: [ 56.318529] kasan_save_stack+0x22/0x50 [ 56.319039] kasan_set_track+0x25/0x30 [ 56.319539] __kasan_slab_alloc+0x59/0x70 [ 56.320066] kmem_cache_alloc+0x16b/0x370 [ 56.320596] vm_area_dup+0x20/0x160 [ 56.321050] __split_vma+0x170/0x950 [ 56.321519] split_vma+0xc6/0x110 [ 56.321959] mprotect_fixup+0x8d2/0xb30 [ 56.322469] do_mprotect_pkey+0x87e/0xd40 [ 56.322991] __x64_sys_mprotect+0x78/0xc0 [ 56.323516] do_syscall_64+0x3f/0x90 [ 56.323994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.324649] [ 56.324865] Freed by task 217: [ 56.325255] kasan_save_stack+0x22/0x50 [ 56.325763] kasan_set_track+0x25/0x30 [ 56.326258] kasan_save_free_info+0x2b/0x50 [ 56.326792] __kasan_slab_free+0x10a/0x190 [ 56.327339] kmem_cache_free+0x10d/0x4d0 [ 56.327853] rcu_core+0x8c8/0x2860 [ 56.328296] __do_softirq+0x1b7/0x7d4 [ 56.328777] [ 56.328994] Last potentially related work creation: [ 56.329579] kasan_save_stack+0x22/0x50 [ 56.330084] __kasan_record_aux_stack+0x8e/0xa0 [ 56.330663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.331310] remove_vma+0x139/0x170 [ 56.331765] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.332335] do_vmi_munmap+0x1f1/0x2b0 [ 56.332833] __vm_munmap+0x138/0x3a0 [ 56.333308] __x64_sys_munmap+0x59/0x80 [ 56.333812] do_syscall_64+0x3f/0x90 [ 56.334287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.334932] [ 56.335147] The buggy address belongs to the object at ffff88800ca1abc8 [ 56.335147] which belongs to the cache vm_area_struct of size 168 [ 56.336644] The buggy address is located 88 bytes inside of [ 56.336644] freed 168-byte region [ffff88800ca1abc8, ffff88800ca1ac70) [ 56.338051] [ 56.338270] The buggy address belongs to the physical page: [ 56.338936] page:00000000fb781c7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca1a [ 56.340027] memcg:ffff88800ca1b001 [ 56.340463] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.341109] page_type: 0xffffffff() [ 56.341560] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 56.342487] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca1b001 [ 56.343402] page dumped because: kasan: bad access detected [ 56.344066] [ 56.344280] Memory state around the buggy address: [ 56.344882] ffff88800ca1ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.345742] ffff88800ca1ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 56.346615] >ffff88800ca1ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 56.347472] ^ [ 56.348003] ffff88800ca1ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 56.348864] ffff88800ca1ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 56.349738] ================================================================== [ 56.350946] Disabling lock debugging due to kernel taint [ 58.365879] BUG: Bad rss-counter state mm:000000006a168596 type:MM_FILEPAGES val:33 [ 58.366913] BUG: Bad rss-counter state mm:000000006a168596 type:MM_ANONPAGES val:22 [ 58.819755] BUG: Bad rss-counter state mm:00000000e40bfb0e type:MM_FILEPAGES val:33 [ 58.820839] BUG: Bad rss-counter state mm:00000000e40bfb0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25776' (ECDSA) to the list of known hosts. 2023/06/19 19:32:46 fuzzer started 2023/06/19 19:32:47 dialing manager at localhost:44161 2023/06/19 19:32:47 checking machine... 2023/06/19 19:32:47 checking revisions... [ 59.539018] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:32:47 testing simple program... [ 59.592650] cgroup: Unknown subsys name 'net' [ 59.630945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000fe0 RCX=0000000000000000 RDX=ffff88800de61b40 RSI=ffffffff8184cd4a RDI=ffff888015831120 RBP=ffff888015832100 RSP=ffff88801bef7cd0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=ffff888015831120 R13=0000000000000000 R14=0000000000000000 R15=ffffffff85d3ce80 RIP=ffffffff8176c124 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 00007f14bb572900 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=00007f14bbb27650 CR3=0000000016bb4000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=00007ffc380438b8 CR3=000000000dd4a000 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=2036343a32333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000