syzkaller login: [ 32.585310] BUG: Bad rss-counter state mm:00000000c7143e5c type:MM_FILEPAGES val:33 [ 32.586538] BUG: Bad rss-counter state mm:00000000c7143e5c type:MM_ANONPAGES val:22 [ 32.630808] ================================================================== [ 32.632081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.633243] Read of size 8 at addr ffff8880182df3f8 by task sshd/219 [ 32.634198] [ 32.634467] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.635537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.636686] Call Trace: [ 32.637026] [ 32.637326] dump_stack_lvl+0x91/0xf0 [ 32.637858] print_report+0xcc/0x620 [ 32.638380] ? __virt_addr_valid+0x102/0x340 [ 32.638971] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.639633] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.640300] kasan_report+0xbe/0xf0 [ 32.640807] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.641469] vma_interval_tree_remove+0xc75/0xec0 [ 32.642112] vma_prepare+0xc54/0x11a0 [ 32.642623] __split_vma+0x5af/0x950 [ 32.643127] ? __pfx___split_vma+0x10/0x10 [ 32.643707] ? find_held_lock+0x2c/0x110 [ 32.644261] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.644861] ? lock_is_held_type+0x9f/0x120 [ 32.645433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.646073] ? mtree_range_walk+0x632/0x900 [ 32.646659] ? mas_walk+0x5c7/0x7c0 [ 32.647162] do_vmi_munmap+0x1f1/0x2b0 [ 32.647694] mmap_region+0x1f9/0x2660 [ 32.648212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.648751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.649508] ? __pfx_lock_acquire+0x10/0x10 [ 32.650071] ? __pfx_mmap_region+0x10/0x10 [ 32.650635] ? security_mmap_addr+0x7d/0xa0 [ 32.651197] ? get_unmapped_area+0x1f5/0x3f0 [ 32.651789] do_mmap+0x854/0xf00 [ 32.652259] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.652783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.653381] ksys_mmap_pgoff+0x3af/0x500 [ 32.653912] do_syscall_64+0x3f/0x90 [ 32.654422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.655105] RIP: 0033:0x7fc8d8274d82 [ 32.655591] 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 [ 32.657853] RSP: 002b:00007ffcdeff75f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.658916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8d8274d82 [ 32.659899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8d76ae000 [ 32.660792] RBP: 00007fc8d76ae000 R08: 0000000000000009 R09: 0000000000001000 [ 32.661703] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613cb90dec0 [ 32.662601] R13: 00007ffcdeff7610 R14: 00007ffcdeff7640 R15: 00007ffcdeff79a0 [ 32.663505] [ 32.663825] [ 32.664053] Allocated by task 212: [ 32.664505] kasan_save_stack+0x22/0x50 [ 32.665041] kasan_set_track+0x25/0x30 [ 32.665565] __kasan_slab_alloc+0x59/0x70 [ 32.666122] kmem_cache_alloc+0x16b/0x370 [ 32.666670] vm_area_dup+0x20/0x160 [ 32.667148] __split_vma+0x170/0x950 [ 32.667647] split_vma+0xc6/0x110 [ 32.668135] mprotect_fixup+0x8d2/0xb30 [ 32.668664] do_mprotect_pkey+0x87e/0xd40 [ 32.669218] __x64_sys_mprotect+0x78/0xc0 [ 32.669771] do_syscall_64+0x3f/0x90 [ 32.670273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.670955] [ 32.671184] Freed by task 212: [ 32.671599] kasan_save_stack+0x22/0x50 [ 32.672143] kasan_set_track+0x25/0x30 [ 32.672711] kasan_save_free_info+0x2b/0x50 [ 32.673277] __kasan_slab_free+0x10a/0x190 [ 32.673848] kmem_cache_free+0x10d/0x4d0 [ 32.674388] rcu_core+0x8c8/0x2860 [ 32.674858] __do_softirq+0x1b7/0x7d4 [ 32.675357] [ 32.675584] Last potentially related work creation: [ 32.676220] kasan_save_stack+0x22/0x50 [ 32.676755] __kasan_record_aux_stack+0x8e/0xa0 [ 32.677363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.678045] remove_vma+0x139/0x170 [ 32.678525] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.679113] do_vmi_munmap+0x1f1/0x2b0 [ 32.679625] __vm_munmap+0x138/0x3a0 [ 32.680131] __x64_sys_munmap+0x59/0x80 [ 32.680660] do_syscall_64+0x3f/0x90 [ 32.681161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.681848] [ 32.682079] The buggy address belongs to the object at ffff8880182df3a0 [ 32.682079] which belongs to the cache vm_area_struct of size 168 [ 32.683648] The buggy address is located 88 bytes inside of [ 32.683648] freed 168-byte region [ffff8880182df3a0, ffff8880182df448) [ 32.685161] [ 32.685389] The buggy address belongs to the physical page: [ 32.686078] page:0000000039736911 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182df [ 32.687235] memcg:ffff88801a078801 [ 32.687712] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.688400] page_type: 0xffffffff() [ 32.688893] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.689882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a078801 [ 32.690862] page dumped because: kasan: bad access detected [ 32.691574] [ 32.691814] Memory state around the buggy address: [ 32.692446] ffff8880182df280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.693366] ffff8880182df300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.694284] >ffff8880182df380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.695189] ^ [ 32.696119] ffff8880182df400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.697022] ffff8880182df480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.697926] ================================================================== [ 32.699062] Disabling lock debugging due to kernel taint [ 34.275247] BUG: Bad rss-counter state mm:00000000de26f157 type:MM_FILEPAGES val:33 [ 34.276030] BUG: Bad rss-counter state mm:00000000de26f157 type:MM_ANONPAGES val:22 [ 34.742423] BUG: Bad rss-counter state mm:00000000f550e140 type:MM_FILEPAGES val:33 [ 34.743411] BUG: Bad rss-counter state mm:00000000f550e140 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59419' (ECDSA) to the list of known hosts. 2023/06/19 19:01:52 fuzzer started 2023/06/19 19:01:52 dialing manager at localhost:44161 2023/06/19 19:01:52 checking machine... 2023/06/19 19:01:52 checking revisions... [ 35.479360] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:52 testing simple program... [ 35.529659] cgroup: Unknown subsys name 'net' [ 35.579331] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:50 Registers: info registers vcpu 0 RAX=ffff8880099aae40 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d0008 RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff88801ca07b50 RSP=ffff88801ca07a90 R8 =00000000800d000d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff88800844f780 R13=ffff8880099aa5f0 R14=ffffea0000266a80 R15=ffff88806ce3de00 RIP=ffffffff818072a6 RFL=00000082 [--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 00007fa0bf9a6900 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=00007fa0bff5b650 CR3=000000000eb8a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ffc251449a8 CR3=000000000e2ea000 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=2032353a31303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a31303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000