syzkaller login: [ 33.342113] BUG: Bad rss-counter state mm:00000000c6d59c45 type:MM_FILEPAGES val:33 [ 33.344978] BUG: Bad rss-counter state mm:00000000c6d59c45 type:MM_ANONPAGES val:22 [ 33.528074] ================================================================== [ 33.528997] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.529953] Read of size 8 at addr ffff88801810fdf0 by task sshd/220 [ 33.530911] [ 33.531133] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.532002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.532989] Call Trace: [ 33.533309] <TASK> [ 33.533593] dump_stack_lvl+0x91/0xf0 [ 33.534090] print_report+0xcc/0x620 [ 33.534589] ? __virt_addr_valid+0x102/0x340 [ 33.535158] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.535769] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.536391] kasan_report+0xbe/0xf0 [ 33.536869] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.537487] vma_interval_tree_remove+0xc75/0xec0 [ 33.538095] vma_prepare+0xc54/0x11a0 [ 33.538598] __split_vma+0x5af/0x950 [ 33.539067] ? __pfx___split_vma+0x10/0x10 [ 33.539590] ? find_held_lock+0x2c/0x110 [ 33.540107] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.540676] ? lock_is_held_type+0x9f/0x120 [ 33.541209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.541820] ? mtree_range_walk+0x632/0x900 [ 33.542364] ? mas_walk+0x5c7/0x7c0 [ 33.542843] do_vmi_munmap+0x1f1/0x2b0 [ 33.543334] mmap_region+0x1f9/0x2660 [ 33.543813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.544318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.545022] ? __pfx_lock_acquire+0x10/0x10 [ 33.545555] ? __pfx_mmap_region+0x10/0x10 [ 33.546078] ? security_mmap_addr+0x7d/0xa0 [ 33.546610] ? get_unmapped_area+0x1f5/0x3f0 [ 33.547154] do_mmap+0x854/0xf00 [ 33.547590] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.548078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.548636] ksys_mmap_pgoff+0x3af/0x500 [ 33.549141] do_syscall_64+0x3f/0x90 [ 33.549615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.550260] RIP: 0033:0x7fcf9d0c2d82 [ 33.550746] 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 [ 33.552853] RSP: 002b:00007ffcffdccf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.553750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf9d0c2d82 [ 33.554600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf9c4fc000 [ 33.555434] RBP: 00007fcf9c4fc000 R08: 0000000000000009 R09: 0000000000001000 [ 33.556275] R10: 0000000000000812 R11: 0000000000000206 R12: 000055881e826ec0 [ 33.557116] R13: 00007ffcffdccfa0 R14: 00007ffcffdccfd0 R15: 00007ffcffdcd330 [ 33.558012] </TASK> [ 33.558308] [ 33.558525] Allocated by task 213: [ 33.558969] kasan_save_stack+0x22/0x50 [ 33.559482] kasan_set_track+0x25/0x30 [ 33.559977] __kasan_slab_alloc+0x59/0x70 [ 33.560497] kmem_cache_alloc+0x16b/0x370 [ 33.561012] vm_area_dup+0x20/0x160 [ 33.561466] __split_vma+0x170/0x950 [ 33.561936] split_vma+0xc6/0x110 [ 33.562371] mprotect_fixup+0x8d2/0xb30 [ 33.562892] do_mprotect_pkey+0x87e/0xd40 [ 33.563413] __x64_sys_mprotect+0x78/0xc0 [ 33.563936] do_syscall_64+0x3f/0x90 [ 33.564413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.565050] [ 33.565268] Freed by task 213: [ 33.565658] kasan_save_stack+0x22/0x50 [ 33.566168] kasan_set_track+0x25/0x30 [ 33.566670] kasan_save_free_info+0x2b/0x50 [ 33.567208] __kasan_slab_free+0x10a/0x190 [ 33.567747] kmem_cache_free+0x10d/0x4d0 [ 33.568261] rcu_core+0x8c8/0x2860 [ 33.568711] __do_softirq+0x1b7/0x7d4 [ 33.569184] [ 33.569400] Last potentially related work creation: [ 33.569985] kasan_save_stack+0x22/0x50 [ 33.570495] __kasan_record_aux_stack+0x8e/0xa0 [ 33.571092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.571814] remove_vma+0x139/0x170 [ 33.572268] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.572829] do_vmi_munmap+0x1f1/0x2b0 [ 33.573314] __vm_munmap+0x138/0x3a0 [ 33.573785] __x64_sys_munmap+0x59/0x80 [ 33.574285] do_syscall_64+0x3f/0x90 [ 33.574777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.575419] [ 33.575632] The buggy address belongs to the object at ffff88801810fd98 [ 33.575632] which belongs to the cache vm_area_struct of size 168 [ 33.577089] The buggy address is located 88 bytes inside of [ 33.577089] freed 168-byte region [ffff88801810fd98, ffff88801810fe40) [ 33.578498] [ 33.578725] The buggy address belongs to the physical page: [ 33.579380] page:00000000a5f3fc48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1810f [ 33.580470] memcg:ffff88800ee31701 [ 33.580900] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.581545] page_type: 0xffffffff() [ 33.581999] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.582938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee31701 [ 33.583839] page dumped because: kasan: bad access detected [ 33.584498] [ 33.584715] Memory state around the buggy address: [ 33.585287] ffff88801810fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.586142] ffff88801810fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.587004] >ffff88801810fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.587853] ^ [ 33.588656] ffff88801810fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.589509] ffff88801810fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.590361] ================================================================== [ 33.591385] Disabling lock debugging due to kernel taint [ 36.250232] BUG: Bad rss-counter state mm:0000000076d2ee9b type:MM_FILEPAGES val:33 [ 36.251884] BUG: Bad rss-counter state mm:0000000076d2ee9b type:MM_ANONPAGES val:22 [ 36.717510] BUG: Bad rss-counter state mm:00000000d2c31519 type:MM_FILEPAGES val:33 [ 36.718518] BUG: Bad rss-counter state mm:00000000d2c31519 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29141' (ECDSA) to the list of known hosts. 2023/06/19 23:16:11 fuzzer started 2023/06/19 23:16:11 dialing manager at localhost:44161 2023/06/19 23:16:11 checking machine... 2023/06/19 23:16:11 checking revisions... [ 37.462274] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:16:11 testing simple program... [ 37.513692] cgroup: Unknown subsys name 'net' [ 37.568675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:16:08 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=ffffffff81234143 RDX=0000000000000000 RSI=0000000000482cc0 RDI=ffff88800f141f34 RBP=ffff88800f141b40 RSP=ffff88800e33f7e0 R8 =0000000000000001 R9 =ffffed1002c3b5c8 R10=ffff8880161dae43 R11=0000000000000000 R12=0000000000000000 R13=0000000000482cc0 R14=ffffffff8366cbd9 R15=0000000000000000 RIP=ffffffff8135bd46 RFL=00000246 [---Z-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 00007f931a634900 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=00007f931abe9650 CR3=0000000016086000 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=00000017641efdf8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=000000000005379b RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eef32 R11=ffff88806cf09ff8 R12=000000000005379b R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000016 [----AP-] 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 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=00007fa7e18d2e00 CR3=000000000d710000 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=0077dbf4c0ec77a4d14b1d827ac0453f XMM02=000000000011d2a8ec2efd57dc4c00df XMM03=000000000012474868d2d6f9990f40d3 XMM04=0f2a066e4718294800000000000ae988 XMM05=cb36b62ebf8aded60000000000135140 XMM06=4fda316b135da52b00000000001341e0 XMM07=e042d86d42eb936e00000000001249c8 XMM08=68d2d6f9990f40d3000000000011d308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000