syzkaller login: [ 31.366589] BUG: Bad rss-counter state mm:00000000fbc6c898 type:MM_FILEPAGES val:33 [ 31.368299] BUG: Bad rss-counter state mm:00000000fbc6c898 type:MM_ANONPAGES val:22 [ 31.545082] ================================================================== [ 31.546188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.547322] Read of size 8 at addr ffff888018d81058 by task sshd/220 [ 31.548406] [ 31.548667] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.549703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.550969] Call Trace: [ 31.551374] [ 31.551728] dump_stack_lvl+0x91/0xf0 [ 31.552319] print_report+0xcc/0x620 [ 31.552925] ? __virt_addr_valid+0x102/0x340 [ 31.553593] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.554345] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.555084] kasan_report+0xbe/0xf0 [ 31.555672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.556426] vma_interval_tree_remove+0xc75/0xec0 [ 31.557140] vma_prepare+0xc54/0x11a0 [ 31.557706] __split_vma+0x5af/0x950 [ 31.558263] ? __pfx___split_vma+0x10/0x10 [ 31.558885] ? find_held_lock+0x2c/0x110 [ 31.559549] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.560171] ? lock_is_held_type+0x9f/0x120 [ 31.560762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.561416] ? mtree_range_walk+0x632/0x900 [ 31.562017] ? mas_walk+0x5c7/0x7c0 [ 31.562531] do_vmi_munmap+0x1f1/0x2b0 [ 31.563053] mmap_region+0x1f9/0x2660 [ 31.563578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.564122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.564883] ? __pfx_lock_acquire+0x10/0x10 [ 31.565450] ? __pfx_mmap_region+0x10/0x10 [ 31.566017] ? security_mmap_addr+0x7d/0xa0 [ 31.566583] ? get_unmapped_area+0x1f5/0x3f0 [ 31.567174] do_mmap+0x854/0xf00 [ 31.567647] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.568176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.568777] ksys_mmap_pgoff+0x3af/0x500 [ 31.569326] do_syscall_64+0x3f/0x90 [ 31.569842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.570536] RIP: 0033:0x7fe97e6e4d82 [ 31.571036] 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 [ 31.573331] RSP: 002b:00007fffed63d238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.574326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe97e6e4d82 [ 31.575295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe97db1e000 [ 31.576234] RBP: 00007fe97db1e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.577176] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b19e488f70 [ 31.578117] R13: 00007fffed63d250 R14: 00007fffed63d280 R15: 00007fffed63d5e0 [ 31.579072] [ 31.579404] [ 31.579642] Allocated by task 213: [ 31.580117] kasan_save_stack+0x22/0x50 [ 31.580694] kasan_set_track+0x25/0x30 [ 31.581247] __kasan_slab_alloc+0x59/0x70 [ 31.581817] kmem_cache_alloc+0x16b/0x370 [ 31.582409] vm_area_dup+0x20/0x160 [ 31.582938] __split_vma+0x170/0x950 [ 31.583476] split_vma+0xc6/0x110 [ 31.583969] mprotect_fixup+0x8d2/0xb30 [ 31.584519] do_mprotect_pkey+0x87e/0xd40 [ 31.585106] __x64_sys_mprotect+0x78/0xc0 [ 31.585678] do_syscall_64+0x3f/0x90 [ 31.586192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586916] [ 31.587171] Freed by task 213: [ 31.587615] kasan_save_stack+0x22/0x50 [ 31.588158] kasan_set_track+0x25/0x30 [ 31.588708] kasan_save_free_info+0x2b/0x50 [ 31.589379] __kasan_slab_free+0x10a/0x190 [ 31.589975] kmem_cache_free+0x10d/0x4d0 [ 31.590527] rcu_core+0x8c8/0x2860 [ 31.591017] __do_softirq+0x1b7/0x7d4 [ 31.591567] [ 31.591808] Last potentially related work creation: [ 31.592458] kasan_save_stack+0x22/0x50 [ 31.593003] __kasan_record_aux_stack+0x8e/0xa0 [ 31.593622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.594318] remove_vma+0x139/0x170 [ 31.594811] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.595417] do_vmi_munmap+0x1f1/0x2b0 [ 31.595932] __vm_munmap+0x138/0x3a0 [ 31.596431] __x64_sys_munmap+0x59/0x80 [ 31.596970] do_syscall_64+0x3f/0x90 [ 31.597473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.598169] [ 31.598397] The buggy address belongs to the object at ffff888018d81000 [ 31.598397] which belongs to the cache vm_area_struct of size 168 [ 31.599999] The buggy address is located 88 bytes inside of [ 31.599999] freed 168-byte region [ffff888018d81000, ffff888018d810a8) [ 31.601509] [ 31.601738] The buggy address belongs to the physical page: [ 31.602479] page:00000000b070a203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d81 [ 31.603726] memcg:ffff88800fcad101 [ 31.604207] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.604927] page_type: 0xffffffff() [ 31.605450] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.606467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcad101 [ 31.607503] page dumped because: kasan: bad access detected [ 31.608263] [ 31.608501] Memory state around the buggy address: [ 31.609142] ffff888018d80f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.610100] ffff888018d80f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.611057] >ffff888018d81000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.612030] ^ [ 31.612844] ffff888018d81080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.613799] ffff888018d81100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.614733] ================================================================== [ 31.616020] Disabling lock debugging due to kernel taint [ 33.863984] BUG: Bad rss-counter state mm:000000000e18f907 type:MM_FILEPAGES val:33 [ 33.865155] BUG: Bad rss-counter state mm:000000000e18f907 type:MM_ANONPAGES val:22 [ 34.250541] BUG: Bad rss-counter state mm:000000008c6c8515 type:MM_FILEPAGES val:33 [ 34.251579] BUG: Bad rss-counter state mm:000000008c6c8515 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43018' (ECDSA) to the list of known hosts. 2023/06/20 19:19:49 fuzzer started 2023/06/20 19:19:49 dialing manager at localhost:36067 2023/06/20 19:19:49 checking machine... 2023/06/20 19:19:49 checking revisions... [ 34.970632] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:19:50 testing simple program... [ 35.024907] cgroup: Unknown subsys name 'net' [ 35.083805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:19:49 Registers: info registers vcpu 0 RAX=1ffffffff0c28705 RBX=0000000000000001 RCX=ffffffff8614382a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880168d7a48 RBP=ffff8880168d7a38 RSP=ffff8880168d7970 R8 =ffffffff8614382e R9 =ffff8880168d7a20 R10=0000000000038001 R11=00000000000229d9 R12=ffff8880168d7a40 R13=ffff8880168d7a28 R14=ffff8880168d7d98 R15=ffff8880168d79e0 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007f23f6fa5900 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=00007ffda1d64000 CR3=000000000cd9a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 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=00007ff46d174920 CR3=000000000d85a000 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=e594c6d262540eb6d04436392fecee01 XMM02=ec2efd57dc4c00df000000000011b478 XMM03=26e2e4c49fca2eb2000000000011b548 XMM04=a2380aab32d3b35700000000000ae988 XMM05=19e9129bd510f23500000000001328a0 XMM06=4fda316b135da52b0000000000132728 XMM07=e042d86d42eb936e0000000000122ce0 XMM08=26e2e4c49fca2eb2000000000011b548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000