syzkaller login: [ 50.516991] BUG: Bad rss-counter state mm:000000007a98bc69 type:MM_FILEPAGES val:33 [ 50.518264] BUG: Bad rss-counter state mm:000000007a98bc69 type:MM_ANONPAGES val:22 [ 50.556147] ================================================================== [ 50.557105] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.558058] Read of size 8 at addr ffff88801648e058 by task sshd/227 [ 50.558809] [ 50.559024] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.559875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.560842] Call Trace: [ 50.561157] [ 50.561440] dump_stack_lvl+0x91/0xf0 [ 50.561909] print_report+0xcc/0x620 [ 50.562391] ? __virt_addr_valid+0x102/0x340 [ 50.562936] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.563542] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.564139] kasan_report+0xbe/0xf0 [ 50.564611] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.565217] vma_interval_tree_remove+0xc75/0xec0 [ 50.565801] vma_prepare+0xc54/0x11a0 [ 50.566282] __split_vma+0x5af/0x950 [ 50.566744] ? __pfx___split_vma+0x10/0x10 [ 50.567260] ? find_held_lock+0x2c/0x110 [ 50.567767] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.568322] ? lock_is_held_type+0x9f/0x120 [ 50.568854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.569455] ? mtree_range_walk+0x632/0x900 [ 50.569995] ? mas_walk+0x5c7/0x7c0 [ 50.570483] do_vmi_munmap+0x1f1/0x2b0 [ 50.570965] mmap_region+0x1f9/0x2660 [ 50.571443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.571948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.572653] ? __pfx_lock_acquire+0x10/0x10 [ 50.573170] ? __pfx_mmap_region+0x10/0x10 [ 50.573699] ? security_mmap_addr+0x7d/0xa0 [ 50.574237] ? get_unmapped_area+0x1f5/0x3f0 [ 50.574767] do_mmap+0x854/0xf00 [ 50.575201] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.575689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.576238] ksys_mmap_pgoff+0x3af/0x500 [ 50.576742] do_syscall_64+0x3f/0x90 [ 50.577203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.577839] RIP: 0033:0x7fa7b39afd82 [ 50.578290] 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 [ 50.580383] RSP: 002b:00007ffdd5360d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.581284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7b39afd82 [ 50.582150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7b2de9000 [ 50.582994] RBP: 00007fa7b2de9000 R08: 0000000000000009 R09: 0000000000001000 [ 50.584092] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7d9a5cf60 [ 50.585120] R13: 00007ffdd5360d20 R14: 00007ffdd5360d50 R15: 00007ffdd53610b0 [ 50.586140] [ 50.586484] [ 50.586741] Allocated by task 220: [ 50.587258] kasan_save_stack+0x22/0x50 [ 50.587860] kasan_set_track+0x25/0x30 [ 50.588461] __kasan_slab_alloc+0x59/0x70 [ 50.589072] kmem_cache_alloc+0x16b/0x370 [ 50.589690] vm_area_dup+0x20/0x160 [ 50.590259] __split_vma+0x170/0x950 [ 50.590803] split_vma+0xc6/0x110 [ 50.591309] mprotect_fixup+0x8d2/0xb30 [ 50.591909] do_mprotect_pkey+0x87e/0xd40 [ 50.592509] __x64_sys_mprotect+0x78/0xc0 [ 50.593124] do_syscall_64+0x3f/0x90 [ 50.593656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.594437] [ 50.594684] Freed by task 220: [ 50.595149] kasan_save_stack+0x22/0x50 [ 50.595733] kasan_set_track+0x25/0x30 [ 50.596281] kasan_save_free_info+0x2b/0x50 [ 50.596924] __kasan_slab_free+0x10a/0x190 [ 50.597528] kmem_cache_free+0x10d/0x4d0 [ 50.598172] rcu_core+0x8c8/0x2860 [ 50.598684] __do_softirq+0x1b7/0x7d4 [ 50.599223] [ 50.599477] Last potentially related work creation: [ 50.600170] kasan_save_stack+0x22/0x50 [ 50.600763] __kasan_record_aux_stack+0x8e/0xa0 [ 50.601436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.602194] remove_vma+0x139/0x170 [ 50.602708] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.603379] do_vmi_munmap+0x1f1/0x2b0 [ 50.603929] __vm_munmap+0x138/0x3a0 [ 50.604464] __x64_sys_munmap+0x59/0x80 [ 50.605063] do_syscall_64+0x3f/0x90 [ 50.605608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.606374] [ 50.606626] The buggy address belongs to the object at ffff88801648e000 [ 50.606626] which belongs to the cache vm_area_struct of size 168 [ 50.608348] The buggy address is located 88 bytes inside of [ 50.608348] freed 168-byte region [ffff88801648e000, ffff88801648e0a8) [ 50.609997] [ 50.610258] The buggy address belongs to the physical page: [ 50.611037] page:00000000e73edfd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1648e [ 50.612349] memcg:ffff88801a496501 [ 50.612864] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.613592] page_type: 0xffffffff() [ 50.614139] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.615243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a496501 [ 50.616323] page dumped because: kasan: bad access detected [ 50.617117] [ 50.617367] Memory state around the buggy address: [ 50.618079] ffff88801648df00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 50.619083] ffff88801648df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.620107] >ffff88801648e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.621104] ^ [ 50.621952] ffff88801648e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 50.622966] ffff88801648e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.623963] ================================================================== [ 50.625233] Disabling lock debugging due to kernel taint [ 52.554646] BUG: Bad rss-counter state mm:000000007922f470 type:MM_FILEPAGES val:33 [ 52.555528] BUG: Bad rss-counter state mm:000000007922f470 type:MM_ANONPAGES val:22 [ 53.029809] BUG: Bad rss-counter state mm:00000000e10b00e5 type:MM_FILEPAGES val:33 [ 53.030387] BUG: Bad rss-counter state mm:00000000e10b00e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60963' (ECDSA) to the list of known hosts. 2023/06/20 01:29:06 fuzzer started 2023/06/20 01:29:06 dialing manager at localhost:44161 2023/06/20 01:29:06 checking machine... 2023/06/20 01:29:06 checking revisions... [ 53.644651] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:29:06 testing simple program... [ 53.669967] cgroup: Unknown subsys name 'net' [ 53.713326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c3e2c90 RCX=0000000000000000 RDX=ffff888015a1b680 RSI=0000000000000190 RDI=00000000000001fe RBP=0000000000000190 RSP=ffff888014247870 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00000000000001fe R13=dffffc0000000000 R14=ffff88800c3e2010 R15=00000000000001fe RIP=ffffffff814c02c0 RFL=00000293 [--S-A-C] 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 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=00007ffdb3e40ef9 CR3=000000000c70e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000371e80 RBX=ffff88800dc7a200 RCX=ffffea0000371e01 RDX=ffff88808dc7a200 RSI=ffff88800e19c2e0 RDI=ffff8880087b03c0 RBP=0000000000000000 RSP=ffff88801641fb78 R8 =ffff88800dc7a200 R9 =0000000000000000 R10=ffffea0000386700 R11=0000000000800042 R12=dffffc0000000000 R13=ffff88801641fbb8 R14=0000000000000000 R15=ffff88800e19c2e0 RIP=ffffffff81810213 RFL=00000282 [--S----] 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 00007f836941c900 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=00007f83699d1650 CR3=000000001035e000 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=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