syzkaller login: [ 38.693075] BUG: Bad rss-counter state mm:00000000441722e7 type:MM_FILEPAGES val:33 [ 38.695240] BUG: Bad rss-counter state mm:00000000441722e7 type:MM_ANONPAGES val:22 [ 38.851647] ================================================================== [ 38.852786] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.854014] Read of size 8 at addr ffff88800d59b798 by task sshd/218 [ 38.855086] [ 38.855347] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.856434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.857679] Call Trace: [ 38.858019] [ 38.858322] dump_stack_lvl+0x91/0xf0 [ 38.858849] print_report+0xcc/0x620 [ 38.859355] ? __virt_addr_valid+0x102/0x340 [ 38.859943] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.860600] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.861253] kasan_report+0xbe/0xf0 [ 38.861759] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.862402] vma_interval_tree_remove+0xc75/0xec0 [ 38.863037] vma_prepare+0xc54/0x11a0 [ 38.863552] __split_vma+0x5af/0x950 [ 38.864050] ? __pfx___split_vma+0x10/0x10 [ 38.864620] ? find_held_lock+0x2c/0x110 [ 38.865192] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.865801] ? lock_is_held_type+0x9f/0x120 [ 38.866367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.867013] ? mtree_range_walk+0x632/0x900 [ 38.867602] ? mas_walk+0x5c7/0x7c0 [ 38.868101] do_vmi_munmap+0x1f1/0x2b0 [ 38.868628] mmap_region+0x1f9/0x2660 [ 38.869151] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.869700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.870451] ? __pfx_lock_acquire+0x10/0x10 [ 38.871016] ? __pfx_mmap_region+0x10/0x10 [ 38.871583] ? security_mmap_addr+0x7d/0xa0 [ 38.872143] ? get_unmapped_area+0x1f5/0x3f0 [ 38.872734] do_mmap+0x854/0xf00 [ 38.873216] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.873737] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.874333] ksys_mmap_pgoff+0x3af/0x500 [ 38.874875] do_syscall_64+0x3f/0x90 [ 38.875383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.876072] RIP: 0033:0x7f4888c50d82 [ 38.876562] 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 [ 38.878821] RSP: 002b:00007ffced293508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.879766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4888c50d82 [ 38.880669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f488808a000 [ 38.881577] RBP: 00007f488808a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.882472] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0c0b85b20 [ 38.883375] R13: 00007ffced293520 R14: 00007ffced293550 R15: 00007ffced2938b0 [ 38.884266] [ 38.884583] [ 38.884809] Allocated by task 211: [ 38.885285] kasan_save_stack+0x22/0x50 [ 38.885809] kasan_set_track+0x25/0x30 [ 38.886332] __kasan_slab_alloc+0x59/0x70 [ 38.886898] kmem_cache_alloc+0x16b/0x370 [ 38.887434] vm_area_dup+0x20/0x160 [ 38.887927] __split_vma+0x170/0x950 [ 38.888414] split_vma+0xc6/0x110 [ 38.888884] mprotect_fixup+0x8d2/0xb30 [ 38.889425] do_mprotect_pkey+0x87e/0xd40 [ 38.889990] __x64_sys_mprotect+0x78/0xc0 [ 38.890537] do_syscall_64+0x3f/0x90 [ 38.891034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891723] [ 38.891954] Freed by task 211: [ 38.892373] kasan_save_stack+0x22/0x50 [ 38.892913] kasan_set_track+0x25/0x30 [ 38.893457] kasan_save_free_info+0x2b/0x50 [ 38.894020] __kasan_slab_free+0x10a/0x190 [ 38.894577] kmem_cache_free+0x10d/0x4d0 [ 38.895112] rcu_core+0x8c8/0x2860 [ 38.895630] __do_softirq+0x1b7/0x7d4 [ 38.896137] [ 38.896367] Last potentially related work creation: [ 38.896995] kasan_save_stack+0x22/0x50 [ 38.897528] __kasan_record_aux_stack+0x8e/0xa0 [ 38.898136] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.898820] remove_vma+0x139/0x170 [ 38.899286] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.899889] do_vmi_munmap+0x1f1/0x2b0 [ 38.900397] __vm_munmap+0x138/0x3a0 [ 38.900891] __x64_sys_munmap+0x59/0x80 [ 38.901416] do_syscall_64+0x3f/0x90 [ 38.901904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.902583] [ 38.902815] The buggy address belongs to the object at ffff88800d59b740 [ 38.902815] which belongs to the cache vm_area_struct of size 168 [ 38.904340] The buggy address is located 88 bytes inside of [ 38.904340] freed 168-byte region [ffff88800d59b740, ffff88800d59b7e8) [ 38.905845] [ 38.906066] The buggy address belongs to the physical page: [ 38.906755] page:0000000026321060 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd59b [ 38.907904] memcg:ffff888016620b01 [ 38.908354] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.909041] page_type: 0xffffffff() [ 38.909552] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.910528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016620b01 [ 38.911474] page dumped because: kasan: bad access detected [ 38.912176] [ 38.912406] Memory state around the buggy address: [ 38.913035] ffff88800d59b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.913957] ffff88800d59b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.914869] >ffff88800d59b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.915774] ^ [ 38.916295] ffff88800d59b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.917206] ffff88800d59b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.918111] ================================================================== [ 38.919077] Disabling lock debugging due to kernel taint [ 40.919548] BUG: Bad rss-counter state mm:00000000969e553e type:MM_FILEPAGES val:33 [ 40.920531] BUG: Bad rss-counter state mm:00000000969e553e type:MM_ANONPAGES val:22 [ 41.422619] BUG: Bad rss-counter state mm:00000000432dd0e6 type:MM_FILEPAGES val:33 [ 41.423607] BUG: Bad rss-counter state mm:00000000432dd0e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41159' (ECDSA) to the list of known hosts. 2023/06/21 02:59:30 fuzzer started 2023/06/21 02:59:31 dialing manager at localhost:36067 2023/06/21 02:59:31 checking machine... 2023/06/21 02:59:31 checking revisions... [ 42.141282] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:59:31 testing simple program... [ 42.188439] cgroup: Unknown subsys name 'net' [ 42.225224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:59:30 Registers: info registers vcpu 0 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=1ffffffff0c9776b RDI=ffffffff86055348 RBP=ffff88801474f6a0 RSP=ffff88801474f5d8 R8 =ffffffff864bbb4e R9 =ffff88801474f688 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801474f6a8 R13=ffff88801474f690 R14=ffff88801474f689 R15=ffff88801474f648 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f5654505900 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=00007fe114df5260 CR3=000000000c660000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e28760ea6200a24b00000000000ae988 XMM05=4ab5881587a9ff3f00000000001330c0 XMM06=bdf2e299e47b49d50000000000131b40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8162f83d RDX=ffff888015c49b40 RSI=0000000000000004 RDI=ffffea00006d13b4 RBP=ffffea00006d1380 RSP=ffff88800c59fb40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=7962206d65687420 R12=ffffea00006d13b4 R13=ffff88800c59fc00 R14=0000000000000002 R15=dffffc0000000000 RIP=ffffffff8180fed8 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 00007fe735427900 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=00007ffdf547f000 CR3=000000000dafa000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000