syzkaller login: [ 40.397880] BUG: Bad rss-counter state mm:00000000c4faf72c type:MM_FILEPAGES val:33 [ 40.399074] BUG: Bad rss-counter state mm:00000000c4faf72c type:MM_ANONPAGES val:22 [ 40.436055] ================================================================== [ 40.437250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.438452] Read of size 8 at addr ffff88801583f6b0 by task sshd/221 [ 40.439317] [ 40.439611] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.440653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.441811] Call Trace: [ 40.442176] [ 40.442496] dump_stack_lvl+0x91/0xf0 [ 40.443013] print_report+0xcc/0x620 [ 40.443504] ? __virt_addr_valid+0x102/0x340 [ 40.444071] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.444703] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.445376] kasan_report+0xbe/0xf0 [ 40.445863] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.446513] vma_interval_tree_remove+0xc75/0xec0 [ 40.447307] vma_prepare+0xc54/0x11a0 [ 40.447923] __split_vma+0x5af/0x950 [ 40.448530] ? __pfx___split_vma+0x10/0x10 [ 40.449197] ? find_held_lock+0x2c/0x110 [ 40.449753] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.450341] ? lock_is_held_type+0x9f/0x120 [ 40.450909] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.451530] ? mtree_range_walk+0x632/0x900 [ 40.452116] ? mas_walk+0x5c7/0x7c0 [ 40.452599] do_vmi_munmap+0x1f1/0x2b0 [ 40.453136] mmap_region+0x1f9/0x2660 [ 40.453647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.454275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.455143] ? __pfx_lock_acquire+0x10/0x10 [ 40.455791] ? __pfx_mmap_region+0x10/0x10 [ 40.456409] ? security_mmap_addr+0x7d/0xa0 [ 40.457046] ? get_unmapped_area+0x1f5/0x3f0 [ 40.457686] do_mmap+0x854/0xf00 [ 40.458195] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.458800] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.459481] ksys_mmap_pgoff+0x3af/0x500 [ 40.460077] do_syscall_64+0x3f/0x90 [ 40.460671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.461462] RIP: 0033:0x7f7cac10bd82 [ 40.461990] 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 [ 40.464644] RSP: 002b:00007ffd63ce8378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.465696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cac10bd82 [ 40.466666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cab545000 [ 40.467618] RBP: 00007f7cab545000 R08: 0000000000000009 R09: 0000000000001000 [ 40.468605] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b525b0ec0 [ 40.469572] R13: 00007ffd63ce8390 R14: 00007ffd63ce83c0 R15: 00007ffd63ce8720 [ 40.470530] [ 40.470854] [ 40.471094] Allocated by task 214: [ 40.471566] kasan_save_stack+0x22/0x50 [ 40.472175] kasan_set_track+0x25/0x30 [ 40.472738] __kasan_slab_alloc+0x59/0x70 [ 40.473331] kmem_cache_alloc+0x16b/0x370 [ 40.473902] vm_area_dup+0x20/0x160 [ 40.474412] __split_vma+0x170/0x950 [ 40.474916] split_vma+0xc6/0x110 [ 40.475394] mprotect_fixup+0x8d2/0xb30 [ 40.475969] do_mprotect_pkey+0x87e/0xd40 [ 40.476527] __x64_sys_mprotect+0x78/0xc0 [ 40.477107] do_syscall_64+0x3f/0x90 [ 40.477614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.478296] [ 40.478525] Freed by task 204: [ 40.478951] kasan_save_stack+0x22/0x50 [ 40.479490] kasan_set_track+0x25/0x30 [ 40.480048] kasan_save_free_info+0x2b/0x50 [ 40.480614] __kasan_slab_free+0x10a/0x190 [ 40.481207] kmem_cache_free+0x10d/0x4d0 [ 40.481754] rcu_core+0x8c8/0x2860 [ 40.482226] __do_softirq+0x1b7/0x7d4 [ 40.482734] [ 40.482969] Last potentially related work creation: [ 40.483593] kasan_save_stack+0x22/0x50 [ 40.484159] __kasan_record_aux_stack+0x8e/0xa0 [ 40.484785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.485471] remove_vma+0x139/0x170 [ 40.485970] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.486579] do_vmi_munmap+0x1f1/0x2b0 [ 40.487113] __vm_munmap+0x138/0x3a0 [ 40.487623] __x64_sys_munmap+0x59/0x80 [ 40.488202] do_syscall_64+0x3f/0x90 [ 40.488741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.489447] [ 40.489686] The buggy address belongs to the object at ffff88801583f658 [ 40.489686] which belongs to the cache vm_area_struct of size 168 [ 40.491275] The buggy address is located 88 bytes inside of [ 40.491275] freed 168-byte region [ffff88801583f658, ffff88801583f700) [ 40.492883] [ 40.493127] The buggy address belongs to the physical page: [ 40.493837] page:00000000aa4c76d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1583f [ 40.495027] memcg:ffff888013e45201 [ 40.495484] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.496191] page_type: 0xffffffff() [ 40.496684] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.497712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e45201 [ 40.498676] page dumped because: kasan: bad access detected [ 40.499386] [ 40.499619] Memory state around the buggy address: [ 40.500243] ffff88801583f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.501222] ffff88801583f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.502171] >ffff88801583f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.503091] ^ [ 40.503721] ffff88801583f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.504645] ffff88801583f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.505606] ================================================================== [ 40.506789] Disabling lock debugging due to kernel taint [ 43.039825] BUG: Bad rss-counter state mm:0000000076d6f615 type:MM_FILEPAGES val:33 [ 43.041348] BUG: Bad rss-counter state mm:0000000076d6f615 type:MM_ANONPAGES val:22 [ 43.505069] BUG: Bad rss-counter state mm:00000000ead502dc type:MM_FILEPAGES val:33 [ 43.506085] BUG: Bad rss-counter state mm:00000000ead502dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31372' (ECDSA) to the list of known hosts. 2023/06/19 22:36:01 fuzzer started 2023/06/19 22:36:01 dialing manager at localhost:44161 2023/06/19 22:36:01 checking machine... 2023/06/19 22:36:01 checking revisions... [ 44.222316] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:36:01 testing simple program... [ 44.266367] cgroup: Unknown subsys name 'net' [ 44.313548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:51 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff860546b8 RCX=ffffffff84601449 RDX=0000000000000007 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff860546bc RSP=ffff88806ce099e0 R8 =ffffffff864baff8 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546d8 R13=ffffffff8605469c R14=ffffffff860546b8 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000217 [----APC] 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=00007f37b25fd000 CR3=000000000c4a4000 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=2031303a36333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000c RCX=0000000000000000 RDX=ffffed1002d91fc8 RSI=00007ffcc0372364 RDI=ffff888016c8fe3c RBP=00007ffcc0372364 RSP=ffff888016c8fd90 R8 =0000000000000001 R9 =ffffed1002d91fc7 R10=ffff888016c8fe3b R11=0000000000000000 R12=00007ffcc0372358 R13=ffff888016c8fe30 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8217c565 RFL=00040247 [---Z-PC] 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 00007f01db94d900 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=00007ffcc036f000 CR3=000000000edc8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000