syzkaller login: [ 61.582333] BUG: Bad rss-counter state mm:00000000537813c2 type:MM_FILEPAGES val:33 [ 61.584309] BUG: Bad rss-counter state mm:00000000537813c2 type:MM_ANONPAGES val:22 [ 61.754083] ================================================================== [ 61.755417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.756720] Read of size 8 at addr ffff88800e3af798 by task sshd/227 [ 61.757654] [ 61.757914] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.759007] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.760223] Call Trace: [ 61.760616] [ 61.760949] dump_stack_lvl+0x91/0xf0 [ 61.761536] print_report+0xcc/0x620 [ 61.762119] ? __virt_addr_valid+0x102/0x340 [ 61.762780] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.763534] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.764272] kasan_report+0xbe/0xf0 [ 61.764840] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.765582] vma_interval_tree_remove+0xc75/0xec0 [ 61.766314] vma_prepare+0xc54/0x11a0 [ 61.766897] __split_vma+0x5af/0x950 [ 61.767494] ? __pfx___split_vma+0x10/0x10 [ 61.768138] ? find_held_lock+0x2c/0x110 [ 61.768781] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.769464] ? lock_is_held_type+0x9f/0x120 [ 61.770120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.770855] ? mtree_range_walk+0x632/0x900 [ 61.771519] ? mas_walk+0x5c7/0x7c0 [ 61.772086] do_vmi_munmap+0x1f1/0x2b0 [ 61.772686] mmap_region+0x1f9/0x2660 [ 61.773271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.773884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.774743] ? __pfx_lock_acquire+0x10/0x10 [ 61.775404] ? __pfx_mmap_region+0x10/0x10 [ 61.776055] ? security_mmap_addr+0x7d/0xa0 [ 61.776700] ? get_unmapped_area+0x1f5/0x3f0 [ 61.777365] do_mmap+0x854/0xf00 [ 61.777892] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.778492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.779170] ksys_mmap_pgoff+0x3af/0x500 [ 61.779784] do_syscall_64+0x3f/0x90 [ 61.780352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.781134] RIP: 0033:0x7f595165cd82 [ 61.781694] 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 [ 61.784333] RSP: 002b:00007ffd389d23e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.785442] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f595165cd82 [ 61.786485] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5950a96000 [ 61.787524] RBP: 00007f5950a96000 R08: 0000000000000009 R09: 0000000000001000 [ 61.788569] R10: 0000000000000812 R11: 0000000000000206 R12: 000056238082fec0 [ 61.789600] R13: 00007ffd389d2400 R14: 00007ffd389d2430 R15: 00007ffd389d2790 [ 61.790648] [ 61.791003] [ 61.791259] Allocated by task 220: [ 61.791799] kasan_save_stack+0x22/0x50 [ 61.792409] kasan_set_track+0x25/0x30 [ 61.793008] __kasan_slab_alloc+0x59/0x70 [ 61.793643] kmem_cache_alloc+0x16b/0x370 [ 61.794275] vm_area_dup+0x20/0x160 [ 61.794822] __split_vma+0x170/0x950 [ 61.795394] split_vma+0xc6/0x110 [ 61.795938] mprotect_fixup+0x8d2/0xb30 [ 61.796551] do_mprotect_pkey+0x87e/0xd40 [ 61.797177] __x64_sys_mprotect+0x78/0xc0 [ 61.797805] do_syscall_64+0x3f/0x90 [ 61.798378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.799164] [ 61.799452] Freed by task 220: [ 61.799926] kasan_save_stack+0x22/0x50 [ 61.800526] kasan_set_track+0x25/0x30 [ 61.801113] kasan_save_free_info+0x2b/0x50 [ 61.801766] __kasan_slab_free+0x10a/0x190 [ 61.802405] kmem_cache_free+0x10d/0x4d0 [ 61.803013] rcu_core+0x8c8/0x2860 [ 61.803556] __do_softirq+0x1b7/0x7d4 [ 61.804130] [ 61.804388] Last potentially related work creation: [ 61.805101] kasan_save_stack+0x22/0x50 [ 61.805709] __kasan_record_aux_stack+0x8e/0xa0 [ 61.806404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.807189] remove_vma+0x139/0x170 [ 61.807748] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.808432] do_vmi_munmap+0x1f1/0x2b0 [ 61.809015] __vm_munmap+0x138/0x3a0 [ 61.809578] __x64_sys_munmap+0x59/0x80 [ 61.810178] do_syscall_64+0x3f/0x90 [ 61.810739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.811537] [ 61.811794] Second to last potentially related work creation: [ 61.812636] kasan_save_stack+0x22/0x50 [ 61.813251] __kasan_record_aux_stack+0x8e/0xa0 [ 61.813948] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.814728] remove_vma+0x139/0x170 [ 61.815202] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.815753] do_vmi_munmap+0x1f1/0x2b0 [ 61.816211] __vm_munmap+0x138/0x3a0 [ 61.816654] elf_map+0x26f/0x310 [ 61.817076] load_elf_binary+0x3417/0x5030 [ 61.817582] bprm_execve+0x803/0x1940 [ 61.818026] do_execveat_common+0x734/0x8e0 [ 61.818524] __x64_sys_execve+0x93/0xc0 [ 61.819005] do_syscall_64+0x3f/0x90 [ 61.819497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.820126] [ 61.820351] The buggy address belongs to the object at ffff88800e3af740 [ 61.820351] which belongs to the cache vm_area_struct of size 168 [ 61.821788] The buggy address is located 88 bytes inside of [ 61.821788] freed 168-byte region [ffff88800e3af740, ffff88800e3af7e8) [ 61.823161] [ 61.823394] The buggy address belongs to the physical page: [ 61.824044] page:000000009fdda520 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3af [ 61.825427] memcg:ffff88800e2cc401 [ 61.825971] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.826787] page_type: 0xffffffff() [ 61.827355] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b9f40 dead000000000004 [ 61.828551] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2cc401 [ 61.829708] page dumped because: kasan: bad access detected [ 61.830551] [ 61.830823] Memory state around the buggy address: [ 61.831583] ffff88800e3af680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.832666] ffff88800e3af700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.833726] >ffff88800e3af780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.834778] ^ [ 61.835401] ffff88800e3af800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 61.836459] ffff88800e3af880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 61.837515] ================================================================== [ 61.838837] Disabling lock debugging due to kernel taint [ 64.104162] BUG: Bad rss-counter state mm:00000000b7ae9f77 type:MM_FILEPAGES val:33 [ 64.105597] BUG: Bad rss-counter state mm:00000000b7ae9f77 type:MM_ANONPAGES val:22 [ 64.612112] BUG: Bad rss-counter state mm:00000000a21ea801 type:MM_FILEPAGES val:33 [ 64.613403] BUG: Bad rss-counter state mm:00000000a21ea801 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61688' (ECDSA) to the list of known hosts. 2023/06/21 08:59:34 fuzzer started 2023/06/21 08:59:35 dialing manager at localhost:36067 2023/06/21 08:59:35 checking machine... 2023/06/21 08:59:35 checking revisions... [ 65.333542] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:59:35 testing simple program... [ 65.374625] cgroup: Unknown subsys name 'net' [ 65.407342] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:59:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81894209 RDI=ffff8880096b291c RBP=ffff88800b5d0c98 RSP=ffff88800d92f530 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=00676f6c7379732f R12=0000000000000081 R13=ffffffff856f0da0 R14=ffff88800b5d0cc0 R15=ffff8880096b2900 RIP=ffffffff8189424b RFL=00000213 [----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 00007f686f4a8900 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=00007f686e8c9780 CR3=0000000010264000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a25dd966c5467b0900000000000ae988 XMM05=f1e40500810d040700000000001344c8 XMM06=58eb05b90e2d3b9e0000000000133200 XMM07=fb795ef6d65770560000000000122048 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801021c0f8 RCX=0000000000000000 RDX=1ffff1100204381f RSI=0000000000000000 RDI=ffff88801804fc60 RBP=ffff88801804fc50 RSP=ffff88801804f988 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88801804fc50 R11=0000000000000000 R12=ffff88801021c0f8 R13=ffff88801021c0e0 R14=ffff88801804fc50 R15=0000000000000001 RIP=ffffffff81f2ffd5 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 00007fcf58556900 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=00007ffcd398d000 CR3=000000000ed62000 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