syzkaller login: [ 74.257867] BUG: Bad rss-counter state mm:0000000002349405 type:MM_FILEPAGES val:33 [ 74.259852] BUG: Bad rss-counter state mm:0000000002349405 type:MM_ANONPAGES val:22 [ 74.420282] ================================================================== [ 74.421377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 74.422498] Read of size 8 at addr ffff888017a234e0 by task sshd/219 [ 74.423608] [ 74.423831] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 74.424867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 74.425873] Call Trace: [ 74.426200] [ 74.426488] dump_stack_lvl+0x91/0xf0 [ 74.427029] print_report+0xcc/0x620 [ 74.427518] ? __virt_addr_valid+0x102/0x340 [ 74.428088] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.428719] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.429346] kasan_report+0xbe/0xf0 [ 74.429835] ? vma_interval_tree_remove+0xc75/0xec0 [ 74.430457] vma_interval_tree_remove+0xc75/0xec0 [ 74.431097] vma_prepare+0xc54/0x11a0 [ 74.431577] __split_vma+0x5af/0x950 [ 74.432051] ? __pfx___split_vma+0x10/0x10 [ 74.432582] ? find_held_lock+0x2c/0x110 [ 74.433106] do_vmi_align_munmap+0x2ba/0x11f0 [ 74.433670] ? lock_is_held_type+0x9f/0x120 [ 74.434227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 74.434873] ? mtree_range_walk+0x632/0x900 [ 74.435424] ? mas_walk+0x5c7/0x7c0 [ 74.435897] do_vmi_munmap+0x1f1/0x2b0 [ 74.436386] mmap_region+0x1f9/0x2660 [ 74.436868] ? vm_mmap_pgoff+0x15c/0x3a0 [ 74.437383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 74.438124] ? __pfx_lock_acquire+0x10/0x10 [ 74.438704] ? __pfx_mmap_region+0x10/0x10 [ 74.439259] ? security_mmap_addr+0x7d/0xa0 [ 74.439802] ? get_unmapped_area+0x1f5/0x3f0 [ 74.440355] do_mmap+0x854/0xf00 [ 74.440806] vm_mmap_pgoff+0x1a6/0x3a0 [ 74.441307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 74.441911] ksys_mmap_pgoff+0x3af/0x500 [ 74.442431] do_syscall_64+0x3f/0x90 [ 74.442954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.443604] RIP: 0033:0x7fa833e80d82 [ 74.444075] 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 [ 74.446269] RSP: 002b:00007ffd6e9ca358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 74.447225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa833e80d82 [ 74.448099] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8332ba000 [ 74.448956] RBP: 00007fa8332ba000 R08: 0000000000000009 R09: 0000000000001000 [ 74.449834] R10: 0000000000000812 R11: 0000000000000206 R12: 000056449f83cf70 [ 74.450727] R13: 00007ffd6e9ca370 R14: 00007ffd6e9ca3a0 R15: 00007ffd6e9ca700 [ 74.451599] [ 74.451897] [ 74.452111] Allocated by task 212: [ 74.452545] kasan_save_stack+0x22/0x50 [ 74.453061] kasan_set_track+0x25/0x30 [ 74.453565] __kasan_slab_alloc+0x59/0x70 [ 74.454112] kmem_cache_alloc+0x16b/0x370 [ 74.454654] vm_area_dup+0x20/0x160 [ 74.455136] __split_vma+0x170/0x950 [ 74.455606] split_vma+0xc6/0x110 [ 74.456050] mprotect_fixup+0x8d2/0xb30 [ 74.456564] do_mprotect_pkey+0x87e/0xd40 [ 74.457102] __x64_sys_mprotect+0x78/0xc0 [ 74.457627] do_syscall_64+0x3f/0x90 [ 74.458111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.458786] [ 74.459008] Freed by task 212: [ 74.459408] kasan_save_stack+0x22/0x50 [ 74.459927] kasan_set_track+0x25/0x30 [ 74.460430] kasan_save_free_info+0x2b/0x50 [ 74.460972] __kasan_slab_free+0x10a/0x190 [ 74.461513] kmem_cache_free+0x10d/0x4d0 [ 74.462055] rcu_core+0x8c8/0x2860 [ 74.462510] __do_softirq+0x1b7/0x7d4 [ 74.463021] [ 74.463238] Last potentially related work creation: [ 74.463836] kasan_save_stack+0x22/0x50 [ 74.464469] __kasan_record_aux_stack+0x8e/0xa0 [ 74.465049] __call_rcu_common.constprop.0+0x6a/0xb90 [ 74.465698] remove_vma+0x139/0x170 [ 74.466167] do_vmi_align_munmap+0xd4a/0x11f0 [ 74.466767] do_vmi_munmap+0x1f1/0x2b0 [ 74.467256] __vm_munmap+0x138/0x3a0 [ 74.467734] __x64_sys_munmap+0x59/0x80 [ 74.468234] do_syscall_64+0x3f/0x90 [ 74.468711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 74.469369] [ 74.469587] The buggy address belongs to the object at ffff888017a23488 [ 74.469587] which belongs to the cache vm_area_struct of size 168 [ 74.471145] The buggy address is located 88 bytes inside of [ 74.471145] freed 168-byte region [ffff888017a23488, ffff888017a23530) [ 74.472569] [ 74.472791] The buggy address belongs to the physical page: [ 74.473458] page:0000000006f0a51b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a23 [ 74.474566] memcg:ffff888018bbb601 [ 74.475027] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 74.475737] page_type: 0xffffffff() [ 74.476193] raw: 0100000000000200 ffff88800879fc80 ffffea00003ca040 dead000000000007 [ 74.477143] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018bbb601 [ 74.478071] page dumped because: kasan: bad access detected [ 74.478776] [ 74.479000] Memory state around the buggy address: [ 74.479594] ffff888017a23380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 74.480471] ffff888017a23400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 74.481350] >ffff888017a23480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.482247] ^ [ 74.483043] ffff888017a23500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 74.483925] ffff888017a23580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 74.484785] ================================================================== [ 74.485939] Disabling lock debugging due to kernel taint [ 76.775830] BUG: Bad rss-counter state mm:00000000940b330f type:MM_FILEPAGES val:33 [ 76.777131] BUG: Bad rss-counter state mm:00000000940b330f type:MM_ANONPAGES val:22 [ 77.331113] BUG: Bad rss-counter state mm:00000000bde47f27 type:MM_FILEPAGES val:33 [ 77.332309] BUG: Bad rss-counter state mm:00000000bde47f27 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42717' (ECDSA) to the list of known hosts. 2023/06/19 19:53:05 fuzzer started 2023/06/19 19:53:05 dialing manager at localhost:44161 2023/06/19 19:53:05 checking machine... 2023/06/19 19:53:05 checking revisions... [ 77.970949] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:53:06 testing simple program... [ 78.023023] cgroup: Unknown subsys name 'net' [ 78.079585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:52:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8186b9c4 RDX=00000000000086b9 RSI=00000000000086b9 RDI=ffffffff865096a4 RBP=ffff888008d7f988 RSP=ffff888008d7f8c0 R8 =0000000000000000 R9 =ffff888008d7f970 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888008d7f990 R13=ffff888008d7f978 R14=ffff888008d7f971 R15=ffff888008d7f930 RIP=ffffffff8113077a 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=00007f665e174000 CR3=000000001580e000 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=33353a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844b902d RDX=ffff88800f0751c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888017897628 RSP=ffff888017897170 R8 =0000000000000006 R9 =00007f6ea8908fff R10=ffffffffffffffff R11=ffff888015e4460c R12=ffff888017897768 R13=ffffffffffffffff R14=dffffc0000000000 R15=00007f6ea8908fff RIP=ffffffff814c07e0 RFL=00000207 [-----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 00007f6ea88d4900 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=00007f6ea88b3020 CR3=000000000f6d6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000