syzkaller login: [ 31.250165] BUG: Bad rss-counter state mm:000000007a4060cd type:MM_FILEPAGES val:33 [ 31.251407] BUG: Bad rss-counter state mm:000000007a4060cd type:MM_ANONPAGES val:22 [ 31.404814] ================================================================== [ 31.405756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.406724] Read of size 8 at addr ffff8880158fd058 by task sshd/220 [ 31.407538] [ 31.407779] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.408968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.409975] Call Trace: [ 31.410329] [ 31.410634] dump_stack_lvl+0x91/0xf0 [ 31.411180] print_report+0xcc/0x620 [ 31.411677] ? __virt_addr_valid+0x102/0x340 [ 31.412270] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.412897] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.413540] kasan_report+0xbe/0xf0 [ 31.414026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.414726] vma_interval_tree_remove+0xc75/0xec0 [ 31.415411] vma_prepare+0xc54/0x11a0 [ 31.415938] __split_vma+0x5af/0x950 [ 31.416472] ? __pfx___split_vma+0x10/0x10 [ 31.417042] ? find_held_lock+0x2c/0x110 [ 31.417634] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.418273] ? lock_is_held_type+0x9f/0x120 [ 31.418873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.419564] ? mtree_range_walk+0x632/0x900 [ 31.420186] ? mas_walk+0x5c7/0x7c0 [ 31.420707] do_vmi_munmap+0x1f1/0x2b0 [ 31.421257] mmap_region+0x1f9/0x2660 [ 31.421778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.422364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.423195] ? __pfx_lock_acquire+0x10/0x10 [ 31.423778] ? __pfx_mmap_region+0x10/0x10 [ 31.424371] ? security_mmap_addr+0x7d/0xa0 [ 31.424958] ? get_unmapped_area+0x1f5/0x3f0 [ 31.425571] do_mmap+0x854/0xf00 [ 31.426057] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.426631] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.427274] ksys_mmap_pgoff+0x3af/0x500 [ 31.427839] do_syscall_64+0x3f/0x90 [ 31.428381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429098] RIP: 0033:0x7f813d8abd82 [ 31.429613] 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 [ 31.431993] RSP: 002b:00007fffd8946848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.433007] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f813d8abd82 [ 31.433949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f813cce5000 [ 31.434921] RBP: 00007f813cce5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.435870] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfedfa0ec0 [ 31.436802] R13: 00007fffd8946860 R14: 00007fffd8946890 R15: 00007fffd8946bf0 [ 31.437760] [ 31.438080] [ 31.438334] Allocated by task 213: [ 31.438804] kasan_save_stack+0x22/0x50 [ 31.439394] kasan_set_track+0x25/0x30 [ 31.439935] __kasan_slab_alloc+0x59/0x70 [ 31.440521] kmem_cache_alloc+0x16b/0x370 [ 31.441088] vm_area_dup+0x20/0x160 [ 31.441605] __split_vma+0x170/0x950 [ 31.442124] split_vma+0xc6/0x110 [ 31.442623] mprotect_fixup+0x8d2/0xb30 [ 31.443197] do_mprotect_pkey+0x87e/0xd40 [ 31.443769] __x64_sys_mprotect+0x78/0xc0 [ 31.444345] do_syscall_64+0x3f/0x90 [ 31.444866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.445585] [ 31.445816] Freed by task 213: [ 31.446267] kasan_save_stack+0x22/0x50 [ 31.446819] kasan_set_track+0x25/0x30 [ 31.447396] kasan_save_free_info+0x2b/0x50 [ 31.447973] __kasan_slab_free+0x10a/0x190 [ 31.448570] kmem_cache_free+0x10d/0x4d0 [ 31.449133] rcu_core+0x8c8/0x2860 [ 31.449775] __do_softirq+0x1b7/0x7d4 [ 31.450266] [ 31.450470] Last potentially related work creation: [ 31.451144] kasan_save_stack+0x22/0x50 [ 31.451751] __kasan_record_aux_stack+0x8e/0xa0 [ 31.452465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.453095] remove_vma+0x139/0x170 [ 31.453595] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.454362] do_vmi_munmap+0x1f1/0x2b0 [ 31.454884] __vm_munmap+0x138/0x3a0 [ 31.455479] __x64_sys_munmap+0x59/0x80 [ 31.456010] do_syscall_64+0x3f/0x90 [ 31.456529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.457254] [ 31.457547] The buggy address belongs to the object at ffff8880158fd000 [ 31.457547] which belongs to the cache vm_area_struct of size 168 [ 31.459269] The buggy address is located 88 bytes inside of [ 31.459269] freed 168-byte region [ffff8880158fd000, ffff8880158fd0a8) [ 31.461022] [ 31.461278] The buggy address belongs to the physical page: [ 31.461997] page:00000000a170252b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158fd [ 31.463370] memcg:ffff888015aa9301 [ 31.463860] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.464691] page_type: 0xffffffff() [ 31.465248] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.466362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015aa9301 [ 31.467514] page dumped because: kasan: bad access detected [ 31.468223] [ 31.468441] Memory state around the buggy address: [ 31.469059] ffff8880158fcf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.470013] ffff8880158fcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.470956] >ffff8880158fd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.471934] ^ [ 31.472721] ffff8880158fd080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.473737] ffff8880158fd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.474667] ================================================================== [ 31.475726] Disabling lock debugging due to kernel taint [ 33.595149] BUG: Bad rss-counter state mm:00000000d2c8b9d1 type:MM_FILEPAGES val:33 [ 33.596302] BUG: Bad rss-counter state mm:00000000d2c8b9d1 type:MM_ANONPAGES val:22 [ 34.019539] BUG: Bad rss-counter state mm:000000005d6ae427 type:MM_FILEPAGES val:33 [ 34.020515] BUG: Bad rss-counter state mm:000000005d6ae427 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38919' (ECDSA) to the list of known hosts. 2023/06/21 10:47:03 fuzzer started 2023/06/21 10:47:04 dialing manager at localhost:36067 2023/06/21 10:47:04 checking machine... 2023/06/21 10:47:04 checking revisions... [ 34.743328] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:47:04 testing simple program... [ 34.783318] cgroup: Unknown subsys name 'net' [ 34.840372] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:47:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652c60 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff85652c60 RBP=00007f5954939477 RSP=ffff8880180377d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f5954939477 R13=0000000000000000 R14=ffff888015b651c0 R15=0000000000092cc0 RIP=ffffffff814c0871 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 00007f5954446900 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=00007ffe6c149000 CR3=000000001a242000 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=00007fc5a23dd020 CR3=000000000d8e0000 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=e526805668cd5b840f446d11a8cbcee3 XMM02=000000000011a2b0ec2efd57dc4c00df XMM03=0000000000121bf85ae0e1d0f7e98021 XMM04=4517cce0c3c5fa3a00000000000ae988 XMM05=19e9129bd510f2350000000000131ad8 XMM06=4fda316b135da52b0000000000131960 XMM07=e042d86d42eb936e0000000000121e78 XMM08=5ae0e1d0f7e98021000000000011a310 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000