syzkaller login: [ 66.043235] BUG: Bad rss-counter state mm:00000000dc44371d type:MM_FILEPAGES val:33 [ 66.044503] BUG: Bad rss-counter state mm:00000000dc44371d type:MM_ANONPAGES val:22 [ 66.200326] ================================================================== [ 66.201318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.202325] Read of size 8 at addr ffff88800f1a0880 by task sshd/221 [ 66.203238] [ 66.203469] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.204390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.205430] Call Trace: [ 66.205766] <TASK> [ 66.206070] dump_stack_lvl+0x91/0xf0 [ 66.206597] print_report+0xcc/0x620 [ 66.207110] ? __virt_addr_valid+0x102/0x340 [ 66.207704] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.208362] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.209046] kasan_report+0xbe/0xf0 [ 66.209551] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.210236] vma_interval_tree_remove+0xc75/0xec0 [ 66.210897] vma_prepare+0xc54/0x11a0 [ 66.211428] __split_vma+0x5af/0x950 [ 66.211949] ? __pfx___split_vma+0x10/0x10 [ 66.212536] ? find_held_lock+0x2c/0x110 [ 66.213123] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.213748] ? lock_is_held_type+0x9f/0x120 [ 66.214347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.215017] ? mtree_range_walk+0x632/0x900 [ 66.215623] ? mas_walk+0x5c7/0x7c0 [ 66.216147] do_vmi_munmap+0x1f1/0x2b0 [ 66.216712] mmap_region+0x1f9/0x2660 [ 66.217503] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.218173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.219075] ? __pfx_lock_acquire+0x10/0x10 [ 66.219740] ? __pfx_mmap_region+0x10/0x10 [ 66.220393] ? security_mmap_addr+0x7d/0xa0 [ 66.221090] ? get_unmapped_area+0x1f5/0x3f0 [ 66.221774] do_mmap+0x854/0xf00 [ 66.222322] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.222939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.223636] ksys_mmap_pgoff+0x3af/0x500 [ 66.224275] do_syscall_64+0x3f/0x90 [ 66.224876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.225668] RIP: 0033:0x7fb0d49b5d82 [ 66.226234] 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 [ 66.228903] RSP: 002b:00007ffcec85a858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.230039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0d49b5d82 [ 66.231085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0d3def000 [ 66.232144] RBP: 00007fb0d3def000 R08: 0000000000000009 R09: 0000000000001000 [ 66.233220] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621dd44bf70 [ 66.234170] R13: 00007ffcec85a870 R14: 00007ffcec85a8a0 R15: 00007ffcec85ac00 [ 66.235026] </TASK> [ 66.235322] [ 66.235539] Allocated by task 214: [ 66.235969] kasan_save_stack+0x22/0x50 [ 66.236474] kasan_set_track+0x25/0x30 [ 66.236982] __kasan_slab_alloc+0x59/0x70 [ 66.237509] kmem_cache_alloc+0x16b/0x370 [ 66.238031] vm_area_dup+0x20/0x160 [ 66.238486] __split_vma+0x170/0x950 [ 66.238953] split_vma+0xc6/0x110 [ 66.239399] mprotect_fixup+0x8d2/0xb30 [ 66.239900] do_mprotect_pkey+0x87e/0xd40 [ 66.240423] __x64_sys_mprotect+0x78/0xc0 [ 66.240954] do_syscall_64+0x3f/0x90 [ 66.241428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.242066] [ 66.242282] Freed by task 203: [ 66.242671] kasan_save_stack+0x22/0x50 [ 66.243182] kasan_set_track+0x25/0x30 [ 66.243680] kasan_save_free_info+0x2b/0x50 [ 66.244222] __kasan_slab_free+0x10a/0x190 [ 66.244824] kmem_cache_free+0x10d/0x4d0 [ 66.245336] rcu_core+0x8c8/0x2860 [ 66.245785] __do_softirq+0x1b7/0x7d4 [ 66.246261] [ 66.246476] Last potentially related work creation: [ 66.247077] kasan_save_stack+0x22/0x50 [ 66.247585] __kasan_record_aux_stack+0x8e/0xa0 [ 66.248174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.248842] remove_vma+0x139/0x170 [ 66.249295] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.249856] do_vmi_munmap+0x1f1/0x2b0 [ 66.250345] __vm_munmap+0x138/0x3a0 [ 66.250814] __x64_sys_munmap+0x59/0x80 [ 66.251313] do_syscall_64+0x3f/0x90 [ 66.251786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.252429] [ 66.252645] The buggy address belongs to the object at ffff88800f1a0828 [ 66.252645] which belongs to the cache vm_area_struct of size 168 [ 66.254125] The buggy address is located 88 bytes inside of [ 66.254125] freed 168-byte region [ffff88800f1a0828, ffff88800f1a08d0) [ 66.255536] [ 66.255755] The buggy address belongs to the physical page: [ 66.256409] page:000000007428ade1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1a0 [ 66.257495] memcg:ffff88800e042401 [ 66.257922] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.258569] page_type: 0xffffffff() [ 66.259024] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.259940] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e042401 [ 66.260901] page dumped because: kasan: bad access detected [ 66.261563] [ 66.261780] Memory state around the buggy address: [ 66.262363] ffff88800f1a0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 66.263226] ffff88800f1a0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 66.264078] >ffff88800f1a0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 66.264935] ^ [ 66.265350] ffff88800f1a0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.266200] ffff88800f1a0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 66.267051] ================================================================== [ 66.268150] Disabling lock debugging due to kernel taint [ 68.362970] BUG: Bad rss-counter state mm:00000000e7315b18 type:MM_FILEPAGES val:32 [ 68.364127] BUG: Bad rss-counter state mm:00000000e7315b18 type:MM_ANONPAGES val:22 [ 68.929841] BUG: Bad rss-counter state mm:00000000d8b8a31a type:MM_FILEPAGES val:33 [ 68.930978] BUG: Bad rss-counter state mm:00000000d8b8a31a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42468' (ECDSA) to the list of known hosts. 2023/06/19 22:55:29 fuzzer started 2023/06/19 22:55:29 dialing manager at localhost:44161 2023/06/19 22:55:29 checking machine... 2023/06/19 22:55:29 checking revisions... [ 69.602765] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:55:29 testing simple program... [ 69.647199] cgroup: Unknown subsys name 'net' [ 69.683679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:55:21 Registers: info registers vcpu 0 RAX=1ffff11002d6b439 RBX=ffff888016b5a198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016b5a1c8 RBP=ffff888016eabf00 RSP=ffff888015e47bd8 R8 =0000000000000001 R9 =ffffed1002bc8f6f R10=0000000000000003 R11=0000000000110000 R12=dffffc0000000000 R13=ffff888016eabf00 R14=ffffffff81802eb3 R15=ffff888016b5be80 RIP=ffffffff8184636c RFL=00000046 [---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 00007efef3d57900 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=00007ffd5661dfe8 CR3=00000000165f2000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007feeafaa2690 CR3=000000000d84c000 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=1f4ffca83afcad8f984f17d72b7dd04b XMM02=ec2efd57dc4c00df000000000011d190 XMM03=ace88a4740b04621000000000011d260 XMM04=ce8ea4d76f4d9cab00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134398 XMM06=d050747552dbe2bf00000000001332e8 XMM07=e042d86d42eb936e0000000000124cc0 XMM08=ace88a4740b04621000000000011d260 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000