syzkaller login: [ 60.406996] BUG: Bad rss-counter state mm:00000000aa37bd92 type:MM_FILEPAGES val:33 [ 60.408546] BUG: Bad rss-counter state mm:00000000aa37bd92 type:MM_ANONPAGES val:22 [ 60.580660] ================================================================== [ 60.581795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.583095] Read of size 8 at addr ffff88800d14b140 by task sshd/222 [ 60.584044] [ 60.584315] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.585404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.586602] Call Trace: [ 60.587037] [ 60.587361] dump_stack_lvl+0x91/0xf0 [ 60.587889] print_report+0xcc/0x620 [ 60.588419] ? __virt_addr_valid+0x102/0x340 [ 60.589017] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.589680] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.590357] kasan_report+0xbe/0xf0 [ 60.590895] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.591560] vma_interval_tree_remove+0xc75/0xec0 [ 60.592203] vma_prepare+0xc54/0x11a0 [ 60.592719] __split_vma+0x5af/0x950 [ 60.593230] ? __pfx___split_vma+0x10/0x10 [ 60.593799] ? find_held_lock+0x2c/0x110 [ 60.594356] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.594956] ? lock_is_held_type+0x9f/0x120 [ 60.595530] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.596194] ? mtree_range_walk+0x632/0x900 [ 60.596797] ? mas_walk+0x5c7/0x7c0 [ 60.597309] do_vmi_munmap+0x1f1/0x2b0 [ 60.597809] mmap_region+0x1f9/0x2660 [ 60.598301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.598906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.599706] ? __pfx_lock_acquire+0x10/0x10 [ 60.600300] ? __pfx_mmap_region+0x10/0x10 [ 60.600831] ? security_mmap_addr+0x7d/0xa0 [ 60.601390] ? get_unmapped_area+0x1f5/0x3f0 [ 60.602004] do_mmap+0x854/0xf00 [ 60.602491] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.603081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.603724] ksys_mmap_pgoff+0x3af/0x500 [ 60.604297] do_syscall_64+0x3f/0x90 [ 60.604833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.605564] RIP: 0033:0x7f5a657eed82 [ 60.606081] 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 [ 60.608423] RSP: 002b:00007fff77acf648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.609471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a657eed82 [ 60.610433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a64c28000 [ 60.611427] RBP: 00007f5a64c28000 R08: 0000000000000009 R09: 0000000000001000 [ 60.612395] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab68ba5ec0 [ 60.613360] R13: 00007fff77acf660 R14: 00007fff77acf690 R15: 00007fff77acf9f0 [ 60.614333] [ 60.614623] [ 60.614859] Allocated by task 215: [ 60.615304] kasan_save_stack+0x22/0x50 [ 60.615883] kasan_set_track+0x25/0x30 [ 60.616443] __kasan_slab_alloc+0x59/0x70 [ 60.617037] kmem_cache_alloc+0x16b/0x370 [ 60.617630] vm_area_dup+0x20/0x160 [ 60.618153] __split_vma+0x170/0x950 [ 60.618685] split_vma+0xc6/0x110 [ 60.619227] mprotect_fixup+0x8d2/0xb30 [ 60.619800] do_mprotect_pkey+0x87e/0xd40 [ 60.620401] __x64_sys_mprotect+0x78/0xc0 [ 60.621003] do_syscall_64+0x3f/0x90 [ 60.621517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.622163] [ 60.622407] Freed by task 205: [ 60.622887] kasan_save_stack+0x22/0x50 [ 60.623452] kasan_set_track+0x25/0x30 [ 60.624071] kasan_save_free_info+0x2b/0x50 [ 60.624664] __kasan_slab_free+0x10a/0x190 [ 60.625254] kmem_cache_free+0x10d/0x4d0 [ 60.625818] rcu_core+0x8c8/0x2860 [ 60.626305] __do_softirq+0x1b7/0x7d4 [ 60.626887] [ 60.627137] Last potentially related work creation: [ 60.627814] kasan_save_stack+0x22/0x50 [ 60.628395] __kasan_record_aux_stack+0x8e/0xa0 [ 60.629063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.629812] remove_vma+0x139/0x170 [ 60.630330] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.631014] do_vmi_munmap+0x1f1/0x2b0 [ 60.631584] __vm_munmap+0x138/0x3a0 [ 60.632127] __x64_sys_munmap+0x59/0x80 [ 60.632697] do_syscall_64+0x3f/0x90 [ 60.633249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.633993] [ 60.634244] Second to last potentially related work creation: [ 60.635064] kasan_save_stack+0x22/0x50 [ 60.635660] __kasan_record_aux_stack+0x8e/0xa0 [ 60.636377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.637126] remove_vma+0x139/0x170 [ 60.637634] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.638255] do_vmi_munmap+0x1f1/0x2b0 [ 60.638833] mmap_region+0x1f9/0x2660 [ 60.639388] do_mmap+0x854/0xf00 [ 60.639874] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.640425] ksys_mmap_pgoff+0x3af/0x500 [ 60.640987] do_syscall_64+0x3f/0x90 [ 60.641524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.642250] [ 60.642498] The buggy address belongs to the object at ffff88800d14b0e8 [ 60.642498] which belongs to the cache vm_area_struct of size 168 [ 60.644190] The buggy address is located 88 bytes inside of [ 60.644190] freed 168-byte region [ffff88800d14b0e8, ffff88800d14b190) [ 60.645714] [ 60.645977] The buggy address belongs to the physical page: [ 60.646844] page:000000002d58f0c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd14b [ 60.648236] memcg:ffff88800ebf7f01 [ 60.648692] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.649419] page_type: 0xffffffff() [ 60.649882] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384bc0 dead000000000005 [ 60.650862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebf7f01 [ 60.651801] page dumped because: kasan: bad access detected [ 60.652482] [ 60.652701] Memory state around the buggy address: [ 60.653298] ffff88800d14b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.654185] ffff88800d14b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 60.655107] >ffff88800d14b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.655987] ^ [ 60.656648] ffff88800d14b180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 60.657533] ffff88800d14b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 60.658421] ================================================================== [ 60.659549] Disabling lock debugging due to kernel taint [ 62.785513] BUG: Bad rss-counter state mm:00000000f4358c39 type:MM_FILEPAGES val:33 [ 62.786532] BUG: Bad rss-counter state mm:00000000f4358c39 type:MM_ANONPAGES val:22 [ 63.327350] BUG: Bad rss-counter state mm:00000000a21f120f type:MM_FILEPAGES val:33 [ 63.328392] BUG: Bad rss-counter state mm:00000000a21f120f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60445' (ECDSA) to the list of known hosts. 2023/06/21 07:05:39 fuzzer started 2023/06/21 07:05:39 dialing manager at localhost:36067 2023/06/21 07:05:40 checking machine... 2023/06/21 07:05:40 checking revisions... [ 63.972487] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:05:40 testing simple program... [ 64.021567] cgroup: Unknown subsys name 'net' [ 64.092050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:05:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f140b822f70 CR3=000000000e26c000 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=b9c357baee8ce08cff496add9dd642f0 XMM02=000000000011a6a8ec2efd57dc4c00df XMM03=0000000000121c207a0f5b3d9d91b824 XMM04=98a086d83468f24900000000000ae988 XMM05=59d5b690e0af863b0000000000132e18 XMM06=00c3ffa147b8d8570000000000132ca0 XMM07=e042d86d42eb936e0000000000121ea0 XMM08=7a0f5b3d9d91b824000000000011a708 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f46980f80b0 CR3=000000000df56000 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=2039333a35303a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a35303a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000