syzkaller login: [ 34.038790] BUG: Bad rss-counter state mm:000000008646feaa type:MM_FILEPAGES val:33 [ 34.039487] BUG: Bad rss-counter state mm:000000008646feaa type:MM_ANONPAGES val:22 [ 34.199229] ================================================================== [ 34.200269] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.201372] Read of size 8 at addr ffff888019e075c8 by task sshd/221 [ 34.202378] [ 34.202625] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.203650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.204579] Call Trace: [ 34.204879] [ 34.205148] dump_stack_lvl+0x91/0xf0 [ 34.205611] print_report+0xcc/0x620 [ 34.206069] ? __virt_addr_valid+0x102/0x340 [ 34.206591] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.207175] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.207749] kasan_report+0xbe/0xf0 [ 34.208197] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.208784] vma_interval_tree_remove+0xc75/0xec0 [ 34.209345] vma_prepare+0xc54/0x11a0 [ 34.209901] __split_vma+0x5af/0x950 [ 34.210449] ? __pfx___split_vma+0x10/0x10 [ 34.211058] ? find_held_lock+0x2c/0x110 [ 34.211672] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.212327] ? lock_is_held_type+0x9f/0x120 [ 34.212946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.213641] ? mtree_range_walk+0x632/0x900 [ 34.214274] ? mas_walk+0x5c7/0x7c0 [ 34.214822] do_vmi_munmap+0x1f1/0x2b0 [ 34.215416] mmap_region+0x1f9/0x2660 [ 34.215972] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.216563] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.217389] ? __pfx_lock_acquire+0x10/0x10 [ 34.218008] ? __pfx_mmap_region+0x10/0x10 [ 34.218619] ? security_mmap_addr+0x7d/0xa0 [ 34.219237] ? get_unmapped_area+0x1f5/0x3f0 [ 34.219875] do_mmap+0x854/0xf00 [ 34.220377] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.220946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.221591] ksys_mmap_pgoff+0x3af/0x500 [ 34.222176] do_syscall_64+0x3f/0x90 [ 34.222727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.223491] RIP: 0033:0x7f3b1912ad82 [ 34.224017] 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 [ 34.226485] RSP: 002b:00007ffe5c0341e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.227538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b1912ad82 [ 34.228516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b18564000 [ 34.229489] RBP: 00007f3b18564000 R08: 0000000000000009 R09: 0000000000001000 [ 34.230467] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630f14a2b20 [ 34.231453] R13: 00007ffe5c034200 R14: 00007ffe5c034230 R15: 00007ffe5c034590 [ 34.232437] [ 34.232772] [ 34.233020] Allocated by task 214: [ 34.233523] kasan_save_stack+0x22/0x50 [ 34.234110] kasan_set_track+0x25/0x30 [ 34.234675] __kasan_slab_alloc+0x59/0x70 [ 34.235303] kmem_cache_alloc+0x16b/0x370 [ 34.235898] vm_area_dup+0x20/0x160 [ 34.236423] __split_vma+0x170/0x950 [ 34.236961] split_vma+0xc6/0x110 [ 34.237466] mprotect_fixup+0x8d2/0xb30 [ 34.238043] do_mprotect_pkey+0x87e/0xd40 [ 34.238645] __x64_sys_mprotect+0x78/0xc0 [ 34.239260] do_syscall_64+0x3f/0x90 [ 34.239808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.240546] [ 34.240793] Freed by task 204: [ 34.241244] kasan_save_stack+0x22/0x50 [ 34.241822] kasan_set_track+0x25/0x30 [ 34.242400] kasan_save_free_info+0x2b/0x50 [ 34.243081] __kasan_slab_free+0x10a/0x190 [ 34.243721] kmem_cache_free+0x10d/0x4d0 [ 34.244306] rcu_core+0x8c8/0x2860 [ 34.244818] __do_softirq+0x1b7/0x7d4 [ 34.245388] [ 34.245636] Last potentially related work creation: [ 34.246314] kasan_save_stack+0x22/0x50 [ 34.246896] __kasan_record_aux_stack+0x8e/0xa0 [ 34.247569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.248309] remove_vma+0x139/0x170 [ 34.248840] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.249481] do_vmi_munmap+0x1f1/0x2b0 [ 34.250040] __vm_munmap+0x138/0x3a0 [ 34.250578] __x64_sys_munmap+0x59/0x80 [ 34.251161] do_syscall_64+0x3f/0x90 [ 34.251707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.252452] [ 34.252705] The buggy address belongs to the object at ffff888019e07570 [ 34.252705] which belongs to the cache vm_area_struct of size 168 [ 34.254406] The buggy address is located 88 bytes inside of [ 34.254406] freed 168-byte region [ffff888019e07570, ffff888019e07618) [ 34.256059] [ 34.256307] The buggy address belongs to the physical page: [ 34.257080] page:00000000b8c0d09b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e07 [ 34.258345] memcg:ffff88800dd38b01 [ 34.258836] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.259590] page_type: 0xffffffff() [ 34.260108] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.261164] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd38b01 [ 34.262209] page dumped because: kasan: bad access detected [ 34.262978] [ 34.263246] Memory state around the buggy address: [ 34.263958] ffff888019e07480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.264975] ffff888019e07500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.265960] >ffff888019e07580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.266941] ^ [ 34.267722] ffff888019e07600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.268717] ffff888019e07680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.269696] ================================================================== [ 34.270770] Disabling lock debugging due to kernel taint [ 36.220322] BUG: Bad rss-counter state mm:00000000f84b811c type:MM_FILEPAGES val:33 [ 36.221959] BUG: Bad rss-counter state mm:00000000f84b811c type:MM_ANONPAGES val:22 [ 36.756111] BUG: Bad rss-counter state mm:000000003a5ab6aa type:MM_FILEPAGES val:33 [ 36.757303] BUG: Bad rss-counter state mm:000000003a5ab6aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7253' (ECDSA) to the list of known hosts. 2023/06/20 10:02:45 fuzzer started 2023/06/20 10:02:45 dialing manager at localhost:44161 2023/06/20 10:02:45 checking machine... 2023/06/20 10:02:45 checking revisions... [ 37.354058] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:02:45 testing simple program... [ 37.397333] cgroup: Unknown subsys name 'net' [ 37.443116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81809910 RDX=0000000000008099 RSI=0000000000008099 RDI=ffffffff86507e24 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fc0f R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113077a 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 00007fba95a07900 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=00007fba95fbe618 CR3=000000000e2d6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 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=00007f596263e8e0 CR3=000000000c5b6000 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=c803ba226199d0b2d842d88a1ccfe9cc XMM02=ec2efd57dc4c00df000000000011ef28 XMM03=cb8411322e5c43da000000000011eff8 XMM04=1f7176a94697359c00000000000ae988 XMM05=f8117604c4eccb7000000000001365e8 XMM06=c291bd5c70af25b90000000000135688 XMM07=e042d86d42eb936e0000000000126688 XMM08=cb8411322e5c43da000000000011eff8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000