syzkaller login: [ 33.779046] BUG: Bad rss-counter state mm:0000000028fad40e type:MM_FILEPAGES val:33 [ 33.780481] BUG: Bad rss-counter state mm:0000000028fad40e type:MM_ANONPAGES val:22 [ 33.822469] ================================================================== [ 33.823437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.824437] Read of size 8 at addr ffff88800e532df0 by task sshd/219 [ 33.825254] [ 33.825487] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.826407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.827433] Call Trace: [ 33.827769] [ 33.828074] dump_stack_lvl+0x91/0xf0 [ 33.828587] print_report+0xcc/0x620 [ 33.829110] ? __virt_addr_valid+0x102/0x340 [ 33.829702] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.830392] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.831023] kasan_report+0xbe/0xf0 [ 33.831498] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.832122] vma_interval_tree_remove+0xc75/0xec0 [ 33.832868] vma_prepare+0xc54/0x11a0 [ 33.833400] __split_vma+0x5af/0x950 [ 33.833869] ? __pfx___split_vma+0x10/0x10 [ 33.834409] ? find_held_lock+0x2c/0x110 [ 33.834937] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.835498] ? lock_is_held_type+0x9f/0x120 [ 33.836045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.836664] ? mtree_range_walk+0x632/0x900 [ 33.837226] ? mas_walk+0x5c7/0x7c0 [ 33.837708] do_vmi_munmap+0x1f1/0x2b0 [ 33.838209] mmap_region+0x1f9/0x2660 [ 33.838694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.839215] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.839932] ? __pfx_lock_acquire+0x10/0x10 [ 33.840469] ? __pfx_mmap_region+0x10/0x10 [ 33.841005] ? security_mmap_addr+0x7d/0xa0 [ 33.841532] ? get_unmapped_area+0x1f5/0x3f0 [ 33.842107] do_mmap+0x854/0xf00 [ 33.842546] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.843095] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.843689] ksys_mmap_pgoff+0x3af/0x500 [ 33.844203] do_syscall_64+0x3f/0x90 [ 33.844683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.845326] RIP: 0033:0x7f6831083d82 [ 33.845792] 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 [ 33.847927] RSP: 002b:00007ffcc8056cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.848829] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6831083d82 [ 33.849679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68304bd000 [ 33.850538] RBP: 00007f68304bd000 R08: 0000000000000009 R09: 0000000000001000 [ 33.851383] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612698a8ec0 [ 33.852231] R13: 00007ffcc8056ce0 R14: 00007ffcc8056d10 R15: 00007ffcc8057070 [ 33.853080] [ 33.853373] [ 33.853586] Allocated by task 212: [ 33.854040] kasan_save_stack+0x22/0x50 [ 33.854545] kasan_set_track+0x25/0x30 [ 33.855041] __kasan_slab_alloc+0x59/0x70 [ 33.855563] kmem_cache_alloc+0x16b/0x370 [ 33.856074] vm_area_dup+0x20/0x160 [ 33.856522] __split_vma+0x170/0x950 [ 33.856989] split_vma+0xc6/0x110 [ 33.857422] mprotect_fixup+0x8d2/0xb30 [ 33.857925] do_mprotect_pkey+0x87e/0xd40 [ 33.858447] __x64_sys_mprotect+0x78/0xc0 [ 33.858967] do_syscall_64+0x3f/0x90 [ 33.859436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.860070] [ 33.860283] Freed by task 19: [ 33.860666] kasan_save_stack+0x22/0x50 [ 33.861165] kasan_set_track+0x25/0x30 [ 33.861654] kasan_save_free_info+0x2b/0x50 [ 33.862208] __kasan_slab_free+0x10a/0x190 [ 33.862735] kmem_cache_free+0x10d/0x4d0 [ 33.863245] rcu_core+0x8c8/0x2860 [ 33.863687] __do_softirq+0x1b7/0x7d4 [ 33.864166] [ 33.864386] Last potentially related work creation: [ 33.864965] kasan_save_stack+0x22/0x50 [ 33.865462] __kasan_record_aux_stack+0x8e/0xa0 [ 33.866037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.866673] remove_vma+0x139/0x170 [ 33.867132] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.867690] do_vmi_munmap+0x1f1/0x2b0 [ 33.868172] __vm_munmap+0x138/0x3a0 [ 33.868639] __x64_sys_munmap+0x59/0x80 [ 33.869154] do_syscall_64+0x3f/0x90 [ 33.869650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.870293] [ 33.870510] The buggy address belongs to the object at ffff88800e532d98 [ 33.870510] which belongs to the cache vm_area_struct of size 168 [ 33.871972] The buggy address is located 88 bytes inside of [ 33.871972] freed 168-byte region [ffff88800e532d98, ffff88800e532e40) [ 33.873368] [ 33.873583] The buggy address belongs to the physical page: [ 33.874263] page:000000006aecd574 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe532 [ 33.875333] memcg:ffff88800e61b101 [ 33.875761] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.876454] page_type: 0xffffffff() [ 33.876911] raw: 0100000000000200 ffff88800879fc80 ffffea00005b6f80 dead000000000005 [ 33.877838] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e61b101 [ 33.878767] page dumped because: kasan: bad access detected [ 33.879438] [ 33.879652] Memory state around the buggy address: [ 33.880252] ffff88800e532c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.881113] ffff88800e532d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.881965] >ffff88800e532d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.882832] ^ [ 33.883647] ffff88800e532e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.884522] ffff88800e532e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.885378] ================================================================== [ 33.886539] Disabling lock debugging due to kernel taint [ 36.069030] BUG: Bad rss-counter state mm:000000003f292e5c type:MM_FILEPAGES val:33 [ 36.070836] BUG: Bad rss-counter state mm:000000003f292e5c type:MM_ANONPAGES val:22 [ 36.549068] BUG: Bad rss-counter state mm:00000000b112bcc3 type:MM_FILEPAGES val:33 [ 36.550110] BUG: Bad rss-counter state mm:00000000b112bcc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58269' (ECDSA) to the list of known hosts. 2023/06/19 18:50:25 fuzzer started 2023/06/19 18:50:25 dialing manager at localhost:44161 2023/06/19 18:50:25 checking machine... 2023/06/19 18:50:25 checking revisions... [ 37.225890] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:50:25 testing simple program... [ 37.268109] cgroup: Unknown subsys name 'net' [ 37.313878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:50:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613753e RDX=1ffff1100174be99 RSI=1ffff1100174be98 RDI=1ffff1100174be98 RBP=ffff88800ba5f4c0 RSP=ffff88800ba5f3f8 R8 =ffffffff86137542 R9 =ffff88800ba5f4a8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800ba5f4c8 R13=ffff88800ba5f4b0 R14=ffff88800ba5f7c8 R15=ffff88800ba5f468 RIP=ffffffff811310ce 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 00007f708825b900 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=00007f7088810650 CR3=000000000ed9a000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff88800fff9b40 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806cf09938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88800f00b228 RIP=ffffffff812d862e RFL=00000282 [--S----] 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 00007f5591d79900 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=00007f5591190030 CR3=000000000c938000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=822a301692feda3100000000000ae988 XMM05=07959d11f4d9fbf400000000001346a8 XMM06=dfcdbad4f1609c370000000000133540 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000