syzkaller login: [ 31.648625] BUG: Bad rss-counter state mm:00000000eb97255a type:MM_FILEPAGES val:33 [ 31.649940] BUG: Bad rss-counter state mm:00000000eb97255a type:MM_ANONPAGES val:22 [ 31.690703] ================================================================== [ 31.691976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.693091] Read of size 8 at addr ffff88800d8ca140 by task sshd/221 [ 31.693985] [ 31.694223] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.695243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.696536] Call Trace: [ 31.696897] [ 31.697214] dump_stack_lvl+0x91/0xf0 [ 31.697759] print_report+0xcc/0x620 [ 31.698295] ? __virt_addr_valid+0x102/0x340 [ 31.698908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.699597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.700220] kasan_report+0xbe/0xf0 [ 31.700708] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.701397] vma_interval_tree_remove+0xc75/0xec0 [ 31.702063] vma_prepare+0xc54/0x11a0 [ 31.702595] __split_vma+0x5af/0x950 [ 31.703087] ? __pfx___split_vma+0x10/0x10 [ 31.703646] ? find_held_lock+0x2c/0x110 [ 31.704234] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.704874] ? lock_is_held_type+0x9f/0x120 [ 31.705479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.706119] ? mtree_range_walk+0x632/0x900 [ 31.706682] ? mas_walk+0x5c7/0x7c0 [ 31.707218] do_vmi_munmap+0x1f1/0x2b0 [ 31.707786] mmap_region+0x1f9/0x2660 [ 31.708326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.708906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.709717] ? __pfx_lock_acquire+0x10/0x10 [ 31.710320] ? __pfx_mmap_region+0x10/0x10 [ 31.710927] ? security_mmap_addr+0x7d/0xa0 [ 31.711539] ? get_unmapped_area+0x1f5/0x3f0 [ 31.712114] do_mmap+0x854/0xf00 [ 31.712554] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.713109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.713743] ksys_mmap_pgoff+0x3af/0x500 [ 31.714316] do_syscall_64+0x3f/0x90 [ 31.714842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.715515] RIP: 0033:0x7f71ad98dd82 [ 31.715999] 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 [ 31.718243] RSP: 002b:00007ffc2d5cd608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.719202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71ad98dd82 [ 31.720114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71acdc7000 [ 31.721023] RBP: 00007f71acdc7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.721919] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558d37f2d90 [ 31.722783] R13: 00007ffc2d5cd620 R14: 00007ffc2d5cd650 R15: 00007ffc2d5cd9b0 [ 31.723714] [ 31.724028] [ 31.724259] Allocated by task 214: [ 31.724738] kasan_save_stack+0x22/0x50 [ 31.725279] kasan_set_track+0x25/0x30 [ 31.725808] __kasan_slab_alloc+0x59/0x70 [ 31.726374] kmem_cache_alloc+0x16b/0x370 [ 31.726935] vm_area_dup+0x20/0x160 [ 31.727452] __split_vma+0x170/0x950 [ 31.727961] split_vma+0xc6/0x110 [ 31.728440] mprotect_fixup+0x8d2/0xb30 [ 31.728989] do_mprotect_pkey+0x87e/0xd40 [ 31.729558] __x64_sys_mprotect+0x78/0xc0 [ 31.730109] do_syscall_64+0x3f/0x90 [ 31.730589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.731368] [ 31.731609] Freed by task 214: [ 31.732039] kasan_save_stack+0x22/0x50 [ 31.732582] kasan_set_track+0x25/0x30 [ 31.733114] kasan_save_free_info+0x2b/0x50 [ 31.733703] __kasan_slab_free+0x10a/0x190 [ 31.734249] kmem_cache_free+0x10d/0x4d0 [ 31.734759] rcu_core+0x8c8/0x2860 [ 31.735235] __do_softirq+0x1b7/0x7d4 [ 31.735777] [ 31.736010] Last potentially related work creation: [ 31.736642] kasan_save_stack+0x22/0x50 [ 31.737190] __kasan_record_aux_stack+0x8e/0xa0 [ 31.737813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.738453] remove_vma+0x139/0x170 [ 31.738934] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.739542] do_vmi_munmap+0x1f1/0x2b0 [ 31.740064] __vm_munmap+0x138/0x3a0 [ 31.740571] __x64_sys_munmap+0x59/0x80 [ 31.741106] do_syscall_64+0x3f/0x90 [ 31.741616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.742283] [ 31.742496] The buggy address belongs to the object at ffff88800d8ca0e8 [ 31.742496] which belongs to the cache vm_area_struct of size 168 [ 31.744081] The buggy address is located 88 bytes inside of [ 31.744081] freed 168-byte region [ffff88800d8ca0e8, ffff88800d8ca190) [ 31.745592] [ 31.745828] The buggy address belongs to the physical page: [ 31.746492] page:00000000ca2ab973 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8ca [ 31.747610] memcg:ffff88800fd70501 [ 31.748076] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.748779] page_type: 0xffffffff() [ 31.749272] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.750258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd70501 [ 31.751204] page dumped because: kasan: bad access detected [ 31.751939] [ 31.752173] Memory state around the buggy address: [ 31.752801] ffff88800d8ca000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.753729] ffff88800d8ca080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.754600] >ffff88800d8ca100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.755516] ^ [ 31.756204] ffff88800d8ca180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.757133] ffff88800d8ca200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.758053] ================================================================== [ 31.758997] Disabling lock debugging due to kernel taint [ 33.506813] BUG: Bad rss-counter state mm:000000009f354fbb type:MM_FILEPAGES val:33 [ 33.508118] BUG: Bad rss-counter state mm:000000009f354fbb type:MM_ANONPAGES val:22 [ 34.080041] BUG: Bad rss-counter state mm:000000005278dce5 type:MM_FILEPAGES val:33 [ 34.081051] BUG: Bad rss-counter state mm:000000005278dce5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26185' (ECDSA) to the list of known hosts. 2023/06/21 05:49:30 fuzzer started 2023/06/21 05:49:31 dialing manager at localhost:36067 2023/06/21 05:49:31 checking machine... 2023/06/21 05:49:31 checking revisions... [ 34.715482] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:49:31 testing simple program... [ 34.761322] cgroup: Unknown subsys name 'net' [ 34.814139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:49:30 Registers: info registers vcpu 0 RAX=ffff8880084400c0 RBX=ffff888011522658 RCX=ffffffff812e0135 RDX=1ffffffff0adb096 RSI=ffff88800f15a7a0 RDI=ffff88801462f638 RBP=0000000000000020 RSP=ffff88801462f6c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800f15a780 R13=0000000000000000 R14=ffff88800ca5a2a8 R15=ffff88800ca5a260 RIP=ffffffff8184763e RFL=00000006 [-----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 00007ff029641900 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=00007ff028ac49f0 CR3=00000000093a0000 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=bf8916f38a1f4985dd4dd80c504f3157 XMM02=ec2efd57dc4c00df0000000000119fe8 XMM03=c835a8d6e29d207c000000000011a0b8 XMM04=26b8ed708b2b9a6100000000000ae988 XMM05=9ba6731b583022b200000000001324f8 XMM06=62221e1ae7fc0c0a00000000001312a8 XMM07=fb795ef6d657705600000000001214f8 XMM08=2c67c8bc2e329bc3000000000011a058 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000008 RSI=ffff8880166b7770 RDI=ffff8880166b76d8 RBP=ffff8880166b7730 RSP=ffff8880166b75f8 R8 =0000000000000001 R9 =ffff8880166b7718 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880166b7738 R13=ffff8880166b7720 R14=ffff8880166b7770 R15=ffff8880166b76d8 RIP=ffffffff81130400 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 00007f964a096900 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=00007f964a075020 CR3=000000000fb90000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000