syzkaller login: [ 67.402452] BUG: Bad rss-counter state mm:00000000dee4ed33 type:MM_FILEPAGES val:33 [ 67.403706] BUG: Bad rss-counter state mm:00000000dee4ed33 type:MM_ANONPAGES val:22 [ 67.444189] ================================================================== [ 67.445318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.446599] Read of size 8 at addr ffff88800fd1a880 by task sshd/221 [ 67.447640] [ 67.447922] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.449135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.450277] Call Trace: [ 67.450660] [ 67.451001] dump_stack_lvl+0x91/0xf0 [ 67.451629] print_report+0xcc/0x620 [ 67.452216] ? __virt_addr_valid+0x102/0x340 [ 67.452872] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.453612] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.454346] kasan_report+0xbe/0xf0 [ 67.454918] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.455675] vma_interval_tree_remove+0xc75/0xec0 [ 67.456396] vma_prepare+0xc54/0x11a0 [ 67.456974] __split_vma+0x5af/0x950 [ 67.457540] ? __pfx___split_vma+0x10/0x10 [ 67.458178] ? find_held_lock+0x2c/0x110 [ 67.458805] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.459487] ? lock_is_held_type+0x9f/0x120 [ 67.460138] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.460863] ? mtree_range_walk+0x632/0x900 [ 67.461525] ? mas_walk+0x5c7/0x7c0 [ 67.462103] do_vmi_munmap+0x1f1/0x2b0 [ 67.462733] mmap_region+0x1f9/0x2660 [ 67.463377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.464044] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.464797] ? __pfx_lock_acquire+0x10/0x10 [ 67.465367] ? __pfx_mmap_region+0x10/0x10 [ 67.465931] ? security_mmap_addr+0x7d/0xa0 [ 67.466495] ? get_unmapped_area+0x1f5/0x3f0 [ 67.467070] do_mmap+0x854/0xf00 [ 67.467543] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.468070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.468663] ksys_mmap_pgoff+0x3af/0x500 [ 67.469196] do_syscall_64+0x3f/0x90 [ 67.469697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.470377] RIP: 0033:0x7fe496790d82 [ 67.470866] 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 [ 67.473118] RSP: 002b:00007ffcb88081b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.474067] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe496790d82 [ 67.474965] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe495bca000 [ 67.475883] RBP: 00007fe495bca000 R08: 0000000000000009 R09: 0000000000001000 [ 67.476773] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ed6eded90 [ 67.477666] R13: 00007ffcb88081d0 R14: 00007ffcb8808200 R15: 00007ffcb8808560 [ 67.478566] [ 67.478874] [ 67.479095] Allocated by task 214: [ 67.479553] kasan_save_stack+0x22/0x50 [ 67.480086] kasan_set_track+0x25/0x30 [ 67.480610] __kasan_slab_alloc+0x59/0x70 [ 67.481156] kmem_cache_alloc+0x16b/0x370 [ 67.481702] vm_area_dup+0x20/0x160 [ 67.482185] __split_vma+0x170/0x950 [ 67.482679] split_vma+0xc6/0x110 [ 67.483144] mprotect_fixup+0x8d2/0xb30 [ 67.483686] do_mprotect_pkey+0x87e/0xd40 [ 67.484234] __x64_sys_mprotect+0x78/0xc0 [ 67.484785] do_syscall_64+0x3f/0x90 [ 67.485280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.485944] [ 67.486173] Freed by task 214: [ 67.486579] kasan_save_stack+0x22/0x50 [ 67.487111] kasan_set_track+0x25/0x30 [ 67.487644] kasan_save_free_info+0x2b/0x50 [ 67.488208] __kasan_slab_free+0x10a/0x190 [ 67.488774] kmem_cache_free+0x10d/0x4d0 [ 67.489307] rcu_core+0x8c8/0x2860 [ 67.489779] __do_softirq+0x1b7/0x7d4 [ 67.490281] [ 67.490502] Last potentially related work creation: [ 67.491121] kasan_save_stack+0x22/0x50 [ 67.491658] __kasan_record_aux_stack+0x8e/0xa0 [ 67.492265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.492949] remove_vma+0x139/0x170 [ 67.493428] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.494011] do_vmi_munmap+0x1f1/0x2b0 [ 67.494533] __vm_munmap+0x138/0x3a0 [ 67.495024] __x64_sys_munmap+0x59/0x80 [ 67.495570] do_syscall_64+0x3f/0x90 [ 67.496069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.496749] [ 67.496974] The buggy address belongs to the object at ffff88800fd1a828 [ 67.496974] which belongs to the cache vm_area_struct of size 168 [ 67.498518] The buggy address is located 88 bytes inside of [ 67.498518] freed 168-byte region [ffff88800fd1a828, ffff88800fd1a8d0) [ 67.500014] [ 67.500240] The buggy address belongs to the physical page: [ 67.500939] page:00000000584907e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1a [ 67.502094] memcg:ffff888019adb101 [ 67.502543] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.503215] page_type: 0xffffffff() [ 67.503706] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.504678] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019adb101 [ 67.505645] page dumped because: kasan: bad access detected [ 67.506341] [ 67.506567] Memory state around the buggy address: [ 67.507177] ffff88800fd1a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 67.508083] ffff88800fd1a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 67.508985] >ffff88800fd1a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 67.509888] ^ [ 67.510318] ffff88800fd1a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.511219] ffff88800fd1a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 67.512133] ================================================================== [ 67.513231] Disabling lock debugging due to kernel taint [ 69.664830] BUG: Bad rss-counter state mm:000000005928799d type:MM_FILEPAGES val:33 [ 69.665995] BUG: Bad rss-counter state mm:000000005928799d type:MM_ANONPAGES val:22 [ 70.139878] BUG: Bad rss-counter state mm:0000000029cc029c type:MM_FILEPAGES val:33 [ 70.141043] BUG: Bad rss-counter state mm:0000000029cc029c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46217' (ECDSA) to the list of known hosts. 2023/06/20 06:36:26 fuzzer started 2023/06/20 06:36:26 dialing manager at localhost:44161 2023/06/20 06:36:26 checking machine... 2023/06/20 06:36:26 checking revisions... [ 70.793373] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:36:26 testing simple program... [ 70.848094] cgroup: Unknown subsys name 'net' [ 70.889734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:48 Registers: info registers vcpu 0 RAX=ffffffff83642d12 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff83642d12 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a85c R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801016d1c0 R15=ffff88800e953d90 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fed0e8ea700 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=00007f63db7207e0 CR3=000000000daa2000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34343630342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343436 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=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001fe6f53 RSI=ffffffff8363dd1c RDI=ffff88800ff37b08 RBP=ffff88800ff37ad8 RSP=ffff88800ff37a30 R8 =0000000000000001 R9 =ffff88800ff37a80 R10=0000000000038001 R11=000000000008a6be R12=ffff88800ff37b08 R13=0000000000000000 R14=ffff88800bfe9b40 R15=ffff888019f9aab0 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 00007f4743cd9900 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=00007fffa18d7000 CR3=000000000d49c000 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