syzkaller login: [ 32.543237] BUG: Bad rss-counter state mm:00000000ec6ab6bf type:MM_FILEPAGES val:33 [ 32.544177] BUG: Bad rss-counter state mm:00000000ec6ab6bf type:MM_ANONPAGES val:22 [ 32.652954] ================================================================== [ 32.653601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.654243] Read of size 8 at addr ffff888016d8f058 by task sshd/220 [ 32.654767] [ 32.654917] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.655504] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.656190] Call Trace: [ 32.656410] [ 32.656608] dump_stack_lvl+0x91/0xf0 [ 32.656950] print_report+0xcc/0x620 [ 32.657291] ? __virt_addr_valid+0x102/0x340 [ 32.657796] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.658220] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.658654] kasan_report+0xbe/0xf0 [ 32.658981] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.659409] vma_interval_tree_remove+0xc75/0xec0 [ 32.659876] vma_prepare+0xc54/0x11a0 [ 32.660212] __split_vma+0x5af/0x950 [ 32.660576] ? __pfx___split_vma+0x10/0x10 [ 32.660944] ? find_held_lock+0x2c/0x110 [ 32.661307] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.661700] ? lock_is_held_type+0x9f/0x120 [ 32.662076] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.662497] ? mtree_range_walk+0x632/0x900 [ 32.662882] ? mas_walk+0x5c7/0x7c0 [ 32.663210] do_vmi_munmap+0x1f1/0x2b0 [ 32.663547] mmap_region+0x1f9/0x2660 [ 32.663916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.664278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.664780] ? __pfx_lock_acquire+0x10/0x10 [ 32.665157] ? __pfx_mmap_region+0x10/0x10 [ 32.665524] ? security_mmap_addr+0x7d/0xa0 [ 32.665891] ? get_unmapped_area+0x1f5/0x3f0 [ 32.666280] do_mmap+0x854/0xf00 [ 32.666584] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.666932] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.667325] ksys_mmap_pgoff+0x3af/0x500 [ 32.667682] do_syscall_64+0x3f/0x90 [ 32.668065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.668514] RIP: 0033:0x7fad92d83d82 [ 32.668839] 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 [ 32.670325] RSP: 002b:00007ffc993b5c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.670964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad92d83d82 [ 32.671553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad921bd000 [ 32.672167] RBP: 00007fad921bd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.672752] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed2bec4d90 [ 32.673358] R13: 00007ffc993b5c70 R14: 00007ffc993b5ca0 R15: 00007ffc993b6000 [ 32.673957] [ 32.674162] [ 32.674311] Allocated by task 213: [ 32.674611] kasan_save_stack+0x22/0x50 [ 32.674970] kasan_set_track+0x25/0x30 [ 32.675313] __kasan_slab_alloc+0x59/0x70 [ 32.675674] kmem_cache_alloc+0x16b/0x370 [ 32.676057] vm_area_dup+0x20/0x160 [ 32.676368] __split_vma+0x170/0x950 [ 32.676693] split_vma+0xc6/0x110 [ 32.677001] mprotect_fixup+0x8d2/0xb30 [ 32.677346] do_mprotect_pkey+0x87e/0xd40 [ 32.677714] __x64_sys_mprotect+0x78/0xc0 [ 32.678077] do_syscall_64+0x3f/0x90 [ 32.678401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.678858] [ 32.679005] Freed by task 213: [ 32.679275] kasan_save_stack+0x22/0x50 [ 32.679623] kasan_set_track+0x25/0x30 [ 32.680024] kasan_save_free_info+0x2b/0x50 [ 32.680397] __kasan_slab_free+0x10a/0x190 [ 32.680764] kmem_cache_free+0x10d/0x4d0 [ 32.681115] rcu_core+0x8c8/0x2860 [ 32.681432] __do_softirq+0x1b7/0x7d4 [ 32.681761] [ 32.681910] Last potentially related work creation: [ 32.682309] kasan_save_stack+0x22/0x50 [ 32.682659] __kasan_record_aux_stack+0x8e/0xa0 [ 32.683053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.683492] remove_vma+0x139/0x170 [ 32.683826] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.684209] do_vmi_munmap+0x1f1/0x2b0 [ 32.684539] __vm_munmap+0x138/0x3a0 [ 32.684864] __x64_sys_munmap+0x59/0x80 [ 32.685212] do_syscall_64+0x3f/0x90 [ 32.685547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.685994] [ 32.686140] The buggy address belongs to the object at ffff888016d8f000 [ 32.686140] which belongs to the cache vm_area_struct of size 168 [ 32.687141] The buggy address is located 88 bytes inside of [ 32.687141] freed 168-byte region [ffff888016d8f000, ffff888016d8f0a8) [ 32.688151] [ 32.688300] The buggy address belongs to the physical page: [ 32.688761] page:0000000001e688cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d8f [ 32.689516] memcg:ffff88800ea16801 [ 32.689810] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.690252] page_type: 0xffffffff() [ 32.690570] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.691210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea16801 [ 32.691865] page dumped because: kasan: bad access detected [ 32.692318] [ 32.692470] Memory state around the buggy address: [ 32.692876] ffff888016d8ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.693473] ffff888016d8ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.694064] >ffff888016d8f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.694649] ^ [ 32.695148] ffff888016d8f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.695763] ffff888016d8f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.696358] ================================================================== [ 32.697222] Disabling lock debugging due to kernel taint [ 34.839784] BUG: Bad rss-counter state mm:00000000ebbd1781 type:MM_FILEPAGES val:33 [ 34.840865] BUG: Bad rss-counter state mm:00000000ebbd1781 type:MM_ANONPAGES val:22 [ 35.193862] BUG: Bad rss-counter state mm:00000000472a7291 type:MM_FILEPAGES val:33 [ 35.194558] BUG: Bad rss-counter state mm:00000000472a7291 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31877' (ECDSA) to the list of known hosts. 2023/06/20 09:34:56 fuzzer started 2023/06/20 09:34:57 dialing manager at localhost:44161 2023/06/20 09:34:57 checking machine... 2023/06/20 09:34:57 checking revisions... [ 35.731213] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:34:57 testing simple program... [ 35.772043] cgroup: Unknown subsys name 'net' [ 35.802865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:34:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fae7d1a00e0 CR3=000000001a114000 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=2036353a34333a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000f RCX=ffffffff8449f17d RDX=ffff88801646d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800c826008 RSP=ffff888016b07ce0 R8 =0000000000000007 R9 =0000000000000000 R10=00007f1d86a4cfff R11=0000000000000000 R12=00007f1d86a4cfff R13=000000000000000e R14=00007f1d869fe000 R15=00007f1d86a54fff RIP=ffffffff814c07e0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1d86a20900 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=00007f1d869ff020 CR3=000000001ca40000 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