syzkaller login: [ 38.520061] BUG: Bad rss-counter state mm:00000000ec520e7b type:MM_FILEPAGES val:33 [ 38.520951] BUG: Bad rss-counter state mm:00000000ec520e7b type:MM_ANONPAGES val:22 [ 38.632548] ================================================================== [ 38.633190] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.633832] Read of size 8 at addr ffff88801811e140 by task sshd/218 [ 38.634350] [ 38.634501] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.635098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.635795] Call Trace: [ 38.636011] [ 38.636209] dump_stack_lvl+0x91/0xf0 [ 38.636558] print_report+0xcc/0x620 [ 38.637042] ? __virt_addr_valid+0x102/0x340 [ 38.637417] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.637881] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.638299] kasan_report+0xbe/0xf0 [ 38.638624] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.639068] vma_interval_tree_remove+0xc75/0xec0 [ 38.639503] vma_prepare+0xc54/0x11a0 [ 38.639827] __split_vma+0x5af/0x950 [ 38.640148] ? __pfx___split_vma+0x10/0x10 [ 38.640486] ? find_held_lock+0x2c/0x110 [ 38.640824] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.641185] ? lock_is_held_type+0x9f/0x120 [ 38.641518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.641921] ? mtree_range_walk+0x632/0x900 [ 38.642269] ? mas_walk+0x5c7/0x7c0 [ 38.642583] do_vmi_munmap+0x1f1/0x2b0 [ 38.642909] mmap_region+0x1f9/0x2660 [ 38.643224] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.643644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.644130] ? __pfx_lock_acquire+0x10/0x10 [ 38.644473] ? __pfx_mmap_region+0x10/0x10 [ 38.644817] ? security_mmap_addr+0x7d/0xa0 [ 38.645162] ? get_unmapped_area+0x1f5/0x3f0 [ 38.645521] do_mmap+0x854/0xf00 [ 38.645805] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.646124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.646492] ksys_mmap_pgoff+0x3af/0x500 [ 38.646831] do_syscall_64+0x3f/0x90 [ 38.647143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.647610] RIP: 0033:0x7fded86e7d82 [ 38.647909] 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 [ 38.649410] RSP: 002b:00007ffd42fac568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.650106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fded86e7d82 [ 38.650730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fded7b21000 [ 38.651350] RBP: 00007fded7b21000 R08: 0000000000000009 R09: 0000000000001000 [ 38.651930] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628f305fd90 [ 38.652518] R13: 00007ffd42fac580 R14: 00007ffd42fac5b0 R15: 00007ffd42fac910 [ 38.653117] [ 38.653319] [ 38.653475] Allocated by task 211: [ 38.653826] kasan_save_stack+0x22/0x50 [ 38.654185] kasan_set_track+0x25/0x30 [ 38.654527] __kasan_slab_alloc+0x59/0x70 [ 38.654886] kmem_cache_alloc+0x16b/0x370 [ 38.655239] vm_area_dup+0x20/0x160 [ 38.655592] __split_vma+0x170/0x950 [ 38.655894] split_vma+0xc6/0x110 [ 38.656184] mprotect_fixup+0x8d2/0xb30 [ 38.656533] do_mprotect_pkey+0x87e/0xd40 [ 38.656905] __x64_sys_mprotect+0x78/0xc0 [ 38.657269] do_syscall_64+0x3f/0x90 [ 38.657594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.658029] [ 38.658178] Freed by task 19: [ 38.658445] kasan_save_stack+0x22/0x50 [ 38.658792] kasan_set_track+0x25/0x30 [ 38.659132] kasan_save_free_info+0x2b/0x50 [ 38.659549] __kasan_slab_free+0x10a/0x190 [ 38.659888] kmem_cache_free+0x10d/0x4d0 [ 38.660234] rcu_core+0x8c8/0x2860 [ 38.660528] __do_softirq+0x1b7/0x7d4 [ 38.660872] [ 38.661018] Last potentially related work creation: [ 38.661410] kasan_save_stack+0x22/0x50 [ 38.661747] __kasan_record_aux_stack+0x8e/0xa0 [ 38.662153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.662622] remove_vma+0x139/0x170 [ 38.662933] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.663350] do_vmi_munmap+0x1f1/0x2b0 [ 38.663692] __vm_munmap+0x138/0x3a0 [ 38.664012] __x64_sys_munmap+0x59/0x80 [ 38.664370] do_syscall_64+0x3f/0x90 [ 38.664700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.665139] [ 38.665285] The buggy address belongs to the object at ffff88801811e0e8 [ 38.665285] which belongs to the cache vm_area_struct of size 168 [ 38.666306] The buggy address is located 88 bytes inside of [ 38.666306] freed 168-byte region [ffff88801811e0e8, ffff88801811e190) [ 38.667303] [ 38.667454] The buggy address belongs to the physical page: [ 38.667910] page:0000000016ab5b34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1811e [ 38.668652] memcg:ffff88801811f001 [ 38.668945] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.669417] page_type: 0xffffffff() [ 38.669717] raw: 0100000000000200 ffff8880087a0c80 ffffea00006045c0 dead000000000007 [ 38.670313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801811f001 [ 38.670914] page dumped because: kasan: bad access detected [ 38.671389] [ 38.671540] Memory state around the buggy address: [ 38.671942] ffff88801811e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.672546] ffff88801811e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.673140] >ffff88801811e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.673728] ^ [ 38.674170] ffff88801811e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.674771] ffff88801811e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.675406] ================================================================== [ 38.676176] Disabling lock debugging due to kernel taint [ 40.206772] BUG: Bad rss-counter state mm:000000001d35ab07 type:MM_FILEPAGES val:33 [ 40.207512] BUG: Bad rss-counter state mm:000000001d35ab07 type:MM_ANONPAGES val:22 [ 40.540510] BUG: Bad rss-counter state mm:00000000e63383ee type:MM_FILEPAGES val:33 [ 40.541176] BUG: Bad rss-counter state mm:00000000e63383ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62127' (ECDSA) to the list of known hosts. 2023/06/21 08:54:49 fuzzer started 2023/06/21 08:54:49 dialing manager at localhost:36067 2023/06/21 08:54:49 checking machine... 2023/06/21 08:54:49 checking revisions... [ 41.127220] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:54:49 testing simple program... [ 41.162815] cgroup: Unknown subsys name 'net' [ 41.215747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:54:49 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=00007fea5128a360 CR3=000000000ef46000 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=518e437e0d07a29eb743017019b81a79 XMM02=ec2efd57dc4c00df000000000011b700 XMM03=acf32cdf501a5473000000000011b7d0 XMM04=7a0f8fa07d1184ce00000000000ae988 XMM05=751b9502027dc0b90000000000131548 XMM06=7ea97e69207dcfa50000000000130720 XMM07=e042d86d42eb936e0000000000121c18 XMM08=acf32cdf501a5473000000000011b7d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000b RBX=0000000097df2aef RCX=ffff88806cb95778 RDX=000000000000000e RSI=ffffffff8451203d RDI=0000000010f1b3d2 RBP=ffff88800d979190 RSP=ffff888019cbfa28 R8 =00000000499f81f3 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888019cbfa90 R15=000000000000000e RIP=ffffffff822704fc 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f61b1985900 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=00007ffcdfa17000 CR3=0000000016ad8000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000