syzkaller login: [ 40.429205] BUG: Bad rss-counter state mm:0000000091dd4fd5 type:MM_FILEPAGES val:33 [ 40.430309] BUG: Bad rss-counter state mm:0000000091dd4fd5 type:MM_ANONPAGES val:22 [ 40.599291] ================================================================== [ 40.600377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.601479] Read of size 8 at addr ffff888010260ed8 by task sshd/219 [ 40.602482] [ 40.602731] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.603605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.604571] Call Trace: [ 40.604893] <TASK> [ 40.605174] dump_stack_lvl+0x91/0xf0 [ 40.605660] print_report+0xcc/0x620 [ 40.606152] ? __virt_addr_valid+0x102/0x340 [ 40.606707] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.607327] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.607936] kasan_report+0xbe/0xf0 [ 40.608421] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.609043] vma_interval_tree_remove+0xc75/0xec0 [ 40.609644] vma_prepare+0xc54/0x11a0 [ 40.610141] __split_vma+0x5af/0x950 [ 40.610611] ? __pfx___split_vma+0x10/0x10 [ 40.611137] ? find_held_lock+0x2c/0x110 [ 40.611652] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.612216] ? lock_is_held_type+0x9f/0x120 [ 40.612748] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.613356] ? mtree_range_walk+0x632/0x900 [ 40.613903] ? mas_walk+0x5c7/0x7c0 [ 40.614395] do_vmi_munmap+0x1f1/0x2b0 [ 40.614885] mmap_region+0x1f9/0x2660 [ 40.615364] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.615869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.616581] ? __pfx_lock_acquire+0x10/0x10 [ 40.617113] ? __pfx_mmap_region+0x10/0x10 [ 40.617645] ? security_mmap_addr+0x7d/0xa0 [ 40.618183] ? get_unmapped_area+0x1f5/0x3f0 [ 40.618741] do_mmap+0x854/0xf00 [ 40.619178] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.619667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.620238] ksys_mmap_pgoff+0x3af/0x500 [ 40.620739] do_syscall_64+0x3f/0x90 [ 40.621210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.621859] RIP: 0033:0x7f377bafbd82 [ 40.622329] 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 [ 40.624443] RSP: 002b:00007ffe917c7eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.625350] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f377bafbd82 [ 40.626204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f377af35000 [ 40.627048] RBP: 00007f377af35000 R08: 0000000000000009 R09: 0000000000001000 [ 40.627899] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e8c3b1b20 [ 40.628738] R13: 00007ffe917c7ed0 R14: 00007ffe917c7f00 R15: 00007ffe917c8260 [ 40.629593] </TASK> [ 40.629882] [ 40.630116] Allocated by task 212: [ 40.630550] kasan_save_stack+0x22/0x50 [ 40.631054] kasan_set_track+0x25/0x30 [ 40.631546] __kasan_slab_alloc+0x59/0x70 [ 40.632069] kmem_cache_alloc+0x16b/0x370 [ 40.632584] vm_area_dup+0x20/0x160 [ 40.633037] __split_vma+0x170/0x950 [ 40.633504] split_vma+0xc6/0x110 [ 40.633940] mprotect_fixup+0x8d2/0xb30 [ 40.634455] do_mprotect_pkey+0x87e/0xd40 [ 40.634972] __x64_sys_mprotect+0x78/0xc0 [ 40.635498] do_syscall_64+0x3f/0x90 [ 40.635975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.636612] [ 40.636831] Freed by task 212: [ 40.637220] kasan_save_stack+0x22/0x50 [ 40.637727] kasan_set_track+0x25/0x30 [ 40.638236] kasan_save_free_info+0x2b/0x50 [ 40.638772] __kasan_slab_free+0x10a/0x190 [ 40.639304] kmem_cache_free+0x10d/0x4d0 [ 40.639820] rcu_core+0x8c8/0x2860 [ 40.640262] __do_softirq+0x1b7/0x7d4 [ 40.640741] [ 40.640955] Last potentially related work creation: [ 40.641540] kasan_save_stack+0x22/0x50 [ 40.642042] __kasan_record_aux_stack+0x8e/0xa0 [ 40.642629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.643280] remove_vma+0x139/0x170 [ 40.643732] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.644287] do_vmi_munmap+0x1f1/0x2b0 [ 40.644770] __vm_munmap+0x138/0x3a0 [ 40.645238] __x64_sys_munmap+0x59/0x80 [ 40.645734] do_syscall_64+0x3f/0x90 [ 40.646210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.646850] [ 40.647064] The buggy address belongs to the object at ffff888010260e80 [ 40.647064] which belongs to the cache vm_area_struct of size 168 [ 40.648548] The buggy address is located 88 bytes inside of [ 40.648548] freed 168-byte region [ffff888010260e80, ffff888010260f28) [ 40.649966] [ 40.650201] The buggy address belongs to the physical page: [ 40.650866] page:000000008e4f0c55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10260 [ 40.651960] memcg:ffff88800c6e8e01 [ 40.652385] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.653075] page_type: 0xffffffff() [ 40.653525] raw: 0100000000000200 ffff88800879fc80 ffffea000031e800 dead000000000007 [ 40.654453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6e8e01 [ 40.655361] page dumped because: kasan: bad access detected [ 40.656018] [ 40.656233] Memory state around the buggy address: [ 40.656818] ffff888010260d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.657678] ffff888010260e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.658543] >ffff888010260e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.659402] ^ [ 40.660123] ffff888010260f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.660989] ffff888010260f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.661837] ================================================================== [ 40.662940] Disabling lock debugging due to kernel taint [ 42.654633] BUG: Bad rss-counter state mm:0000000055e49456 type:MM_FILEPAGES val:33 [ 42.655849] BUG: Bad rss-counter state mm:0000000055e49456 type:MM_ANONPAGES val:22 [ 43.208513] BUG: Bad rss-counter state mm:00000000f39eb532 type:MM_FILEPAGES val:33 [ 43.209635] BUG: Bad rss-counter state mm:00000000f39eb532 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61720' (ECDSA) to the list of known hosts. 2023/06/19 20:39:56 fuzzer started 2023/06/19 20:39:56 dialing manager at localhost:44161 2023/06/19 20:39:56 checking machine... 2023/06/19 20:39:56 checking revisions... [ 43.904602] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:39:56 testing simple program... [ 43.953006] cgroup: Unknown subsys name 'net' [ 44.008467] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:39:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a 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 00007f47274b4900 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=00007f4727a6b618 CR3=0000000017f3e000 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=39333a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383232 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=0000000080000101 RBX=0000000080000000 RCX=0000000000000100 RDX=ffff888008d751c0 RSI=ffffffff811614a8 RDI=ffff8880099a0000 RBP=ffff8880099a0000 RSP=ffff88806cf09e40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff8880099a0000 RIP=ffffffff814c0809 RFL=00000206 [-----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 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=00007f588140f020 CR3=0000000009d8e000 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=4e17e6a9cc7651b926485f9ab2925852 XMM02=ec2efd57dc4c00df000000000011d358 XMM03=84c78054373d9c7d000000000011d428 XMM04=0ef62ed66b04956d00000000000ae988 XMM05=dfcdbad4f1609c370000000000133668 XMM06=218d1919778ddb7a0000000000132840 XMM07=e042d86d42eb936e0000000000124008 XMM08=84c78054373d9c7d000000000011d428 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000