syzkaller login: [ 31.025570] BUG: Bad rss-counter state mm:00000000668824af type:MM_FILEPAGES val:33 [ 31.027029] BUG: Bad rss-counter state mm:00000000668824af type:MM_ANONPAGES val:22 [ 31.195775] ================================================================== [ 31.196704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.197651] Read of size 8 at addr ffff888016808228 by task sshd/219 [ 31.198420] [ 31.198641] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.199631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.200635] Call Trace: [ 31.201065] [ 31.201413] dump_stack_lvl+0x91/0xf0 [ 31.201990] print_report+0xcc/0x620 [ 31.202579] ? __virt_addr_valid+0x102/0x340 [ 31.203226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203966] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204723] kasan_report+0xbe/0xf0 [ 31.205315] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206081] vma_interval_tree_remove+0xc75/0xec0 [ 31.206819] vma_prepare+0xc54/0x11a0 [ 31.207404] __split_vma+0x5af/0x950 [ 31.208000] ? __pfx___split_vma+0x10/0x10 [ 31.208652] ? find_held_lock+0x2c/0x110 [ 31.209290] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.209988] ? lock_is_held_type+0x9f/0x120 [ 31.210650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211398] ? mtree_range_walk+0x632/0x900 [ 31.212115] ? mas_walk+0x5c7/0x7c0 [ 31.212593] do_vmi_munmap+0x1f1/0x2b0 [ 31.213091] mmap_region+0x1f9/0x2660 [ 31.213579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.214089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.214799] ? __pfx_lock_acquire+0x10/0x10 [ 31.215335] ? __pfx_mmap_region+0x10/0x10 [ 31.215864] ? security_mmap_addr+0x7d/0xa0 [ 31.216409] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216957] do_mmap+0x854/0xf00 [ 31.217399] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218471] ksys_mmap_pgoff+0x3af/0x500 [ 31.218975] do_syscall_64+0x3f/0x90 [ 31.219459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220122] RIP: 0033:0x7f45fd999d82 [ 31.220582] 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 [ 31.222719] RSP: 002b:00007ffc98ac7e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45fd999d82 [ 31.224499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45fcdd3000 [ 31.225355] RBP: 00007f45fcdd3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.226204] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615fab3dec0 [ 31.227047] R13: 00007ffc98ac7e60 R14: 00007ffc98ac7e90 R15: 00007ffc98ac81f0 [ 31.227905] [ 31.228217] [ 31.228435] Allocated by task 212: [ 31.228868] kasan_save_stack+0x22/0x50 [ 31.229378] kasan_set_track+0x25/0x30 [ 31.229883] __kasan_slab_alloc+0x59/0x70 [ 31.230420] kmem_cache_alloc+0x16b/0x370 [ 31.230945] vm_area_dup+0x20/0x160 [ 31.231399] __split_vma+0x170/0x950 [ 31.231872] split_vma+0xc6/0x110 [ 31.232331] mprotect_fixup+0x8d2/0xb30 [ 31.232834] do_mprotect_pkey+0x87e/0xd40 [ 31.233354] __x64_sys_mprotect+0x78/0xc0 [ 31.233875] do_syscall_64+0x3f/0x90 [ 31.234353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234989] [ 31.235209] Freed by task 202: [ 31.235611] kasan_save_stack+0x22/0x50 [ 31.236133] kasan_set_track+0x25/0x30 [ 31.236630] kasan_save_free_info+0x2b/0x50 [ 31.237164] __kasan_slab_free+0x10a/0x190 [ 31.237703] kmem_cache_free+0x10d/0x4d0 [ 31.238217] rcu_core+0x8c8/0x2860 [ 31.238676] __do_softirq+0x1b7/0x7d4 [ 31.239160] [ 31.239380] Last potentially related work creation: [ 31.239972] kasan_save_stack+0x22/0x50 [ 31.240482] __kasan_record_aux_stack+0x8e/0xa0 [ 31.241053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241701] remove_vma+0x139/0x170 [ 31.242157] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242720] do_vmi_munmap+0x1f1/0x2b0 [ 31.243209] __vm_munmap+0x138/0x3a0 [ 31.243681] __x64_sys_munmap+0x59/0x80 [ 31.244213] do_syscall_64+0x3f/0x90 [ 31.244693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245341] [ 31.245555] The buggy address belongs to the object at ffff8880168081d0 [ 31.245555] which belongs to the cache vm_area_struct of size 168 [ 31.247034] The buggy address is located 88 bytes inside of [ 31.247034] freed 168-byte region [ffff8880168081d0, ffff888016808278) [ 31.248498] [ 31.248725] The buggy address belongs to the physical page: [ 31.249401] page:0000000010c53d7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16808 [ 31.250528] memcg:ffff888016e27301 [ 31.250966] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251635] page_type: 0xffffffff() [ 31.252104] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.253026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e27301 [ 31.253934] page dumped because: kasan: bad access detected [ 31.254588] [ 31.254805] Memory state around the buggy address: [ 31.255386] ffff888016808100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.256253] ffff888016808180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.257115] >ffff888016808200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.257963] ^ [ 31.258528] ffff888016808280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.259386] ffff888016808300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.260256] ================================================================== [ 31.261553] Disabling lock debugging due to kernel taint [ 34.037032] BUG: Bad rss-counter state mm:000000003218aa75 type:MM_FILEPAGES val:33 [ 34.038211] BUG: Bad rss-counter state mm:000000003218aa75 type:MM_ANONPAGES val:22 [ 34.395175] BUG: Bad rss-counter state mm:00000000ae7a5c69 type:MM_FILEPAGES val:33 [ 34.396141] BUG: Bad rss-counter state mm:00000000ae7a5c69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58726' (ECDSA) to the list of known hosts. 2023/06/20 02:33:36 fuzzer started 2023/06/20 02:33:36 dialing manager at localhost:44161 2023/06/20 02:33:36 checking machine... 2023/06/20 02:33:36 checking revisions... [ 35.125043] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:33:36 testing simple program... [ 35.176749] cgroup: Unknown subsys name 'net' [ 35.237603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce3a2c0 RCX=1ffff1100d9c7473 RDX=1ffffffff0ba7a02 RSI=ffff88806ce3a2c0 RDI=ffffffff85616740 RBP=ffffffff85616740 RSP=ffff88806ce09d80 R8 =ffff88806ce3a378 R9 =1ffff1100d9c7478 R10=ffff88806ce3a3c0 R11=1ffff1100d9c7479 R12=0000000000000001 R13=0000000000006dd8 R14=0000000000006dd8 R15=ffffffff85616740 RIP=ffffffff81364d03 RFL=00000012 [----A--] 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 00007f94359fa900 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=00007f9434e70920 CR3=0000000010124000 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=bae37f5e267884b65e4473d3e6257d9e XMM02=ec2efd57dc4c00df000000000011d1a8 XMM03=fbedc87c9fbf0354000000000011d278 XMM04=5cf9778510b8dfe100000000000ae988 XMM05=f0040775e364c91c0000000000135378 XMM06=dfcdbad4f1609c370000000000134210 XMM07=fb795ef6d65770560000000000124680 XMM08=2c67c8bc2e329bc3000000000011d218 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f93fe01 RSI=ffff88800f93fe50 RDI=ffff88800f93fe50 RBP=ffff88800f93f9f8 RSP=ffff88800f93f930 R8 =0000000000000001 R9 =ffff88800f93f9e0 R10=0000000000038001 R11=000000000008a8f2 R12=ffff88800f93fa00 R13=ffff88800f93f9e8 R14=ffff88800f93fe50 R15=ffff88800f93f9a0 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007ff5829a9900 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=00007ffed8b53000 CR3=000000000fe3a000 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=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