syzkaller login: [ 31.959013] BUG: Bad rss-counter state mm:00000000fe8223fb type:MM_FILEPAGES val:33 [ 31.960490] BUG: Bad rss-counter state mm:00000000fe8223fb type:MM_ANONPAGES val:22 [ 32.114754] ================================================================== [ 32.115863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.116963] Read of size 8 at addr ffff88800994e5c8 by task sshd/219 [ 32.117763] [ 32.117986] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.118881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.119906] Call Trace: [ 32.120235] [ 32.120531] dump_stack_lvl+0x91/0xf0 [ 32.121033] print_report+0xcc/0x620 [ 32.121531] ? __virt_addr_valid+0x102/0x340 [ 32.122102] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.122739] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.123387] kasan_report+0xbe/0xf0 [ 32.123883] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.124523] vma_interval_tree_remove+0xc75/0xec0 [ 32.125146] vma_prepare+0xc54/0x11a0 [ 32.125640] __split_vma+0x5af/0x950 [ 32.126127] ? __pfx___split_vma+0x10/0x10 [ 32.126672] ? find_held_lock+0x2c/0x110 [ 32.127244] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.127834] ? lock_is_held_type+0x9f/0x120 [ 32.128394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.129028] ? mtree_range_walk+0x632/0x900 [ 32.129599] ? mas_walk+0x5c7/0x7c0 [ 32.130100] do_vmi_munmap+0x1f1/0x2b0 [ 32.130609] mmap_region+0x1f9/0x2660 [ 32.131108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.131664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.132378] ? __pfx_lock_acquire+0x10/0x10 [ 32.132912] ? __pfx_mmap_region+0x10/0x10 [ 32.133462] ? security_mmap_addr+0x7d/0xa0 [ 32.134023] ? get_unmapped_area+0x1f5/0x3f0 [ 32.134601] do_mmap+0x854/0xf00 [ 32.135061] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.135578] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.136159] ksys_mmap_pgoff+0x3af/0x500 [ 32.136686] do_syscall_64+0x3f/0x90 [ 32.137188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.137854] RIP: 0033:0x7f084c047d82 [ 32.138326] 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 [ 32.140581] RSP: 002b:00007fff81c67aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.141548] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f084c047d82 [ 32.142443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f084b481000 [ 32.143329] RBP: 00007f084b481000 R08: 0000000000000009 R09: 0000000000001000 [ 32.144207] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560873012b20 [ 32.145084] R13: 00007fff81c67ac0 R14: 00007fff81c67af0 R15: 00007fff81c67e50 [ 32.145970] [ 32.146274] [ 32.146495] Allocated by task 212: [ 32.146939] kasan_save_stack+0x22/0x50 [ 32.147468] kasan_set_track+0x25/0x30 [ 32.147980] __kasan_slab_alloc+0x59/0x70 [ 32.148521] kmem_cache_alloc+0x16b/0x370 [ 32.149055] vm_area_dup+0x20/0x160 [ 32.149522] __split_vma+0x170/0x950 [ 32.150003] split_vma+0xc6/0x110 [ 32.150459] mprotect_fixup+0x8d2/0xb30 [ 32.150976] do_mprotect_pkey+0x87e/0xd40 [ 32.151532] __x64_sys_mprotect+0x78/0xc0 [ 32.152082] do_syscall_64+0x3f/0x90 [ 32.152569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.153236] [ 32.153458] Freed by task 212: [ 32.153864] kasan_save_stack+0x22/0x50 [ 32.154386] kasan_set_track+0x25/0x30 [ 32.154899] kasan_save_free_info+0x2b/0x50 [ 32.155467] __kasan_slab_free+0x10a/0x190 [ 32.156029] kmem_cache_free+0x10d/0x4d0 [ 32.156540] rcu_core+0x8c8/0x2860 [ 32.156993] __do_softirq+0x1b7/0x7d4 [ 32.157474] [ 32.157751] Last potentially related work creation: [ 32.158338] kasan_save_stack+0x22/0x50 [ 32.158847] __kasan_record_aux_stack+0x8e/0xa0 [ 32.159438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.160084] remove_vma+0x139/0x170 [ 32.160533] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.161094] do_vmi_munmap+0x1f1/0x2b0 [ 32.161587] __vm_munmap+0x138/0x3a0 [ 32.162062] __x64_sys_munmap+0x59/0x80 [ 32.162557] do_syscall_64+0x3f/0x90 [ 32.163040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.163720] [ 32.163943] The buggy address belongs to the object at ffff88800994e570 [ 32.163943] which belongs to the cache vm_area_struct of size 168 [ 32.165471] The buggy address is located 88 bytes inside of [ 32.165471] freed 168-byte region [ffff88800994e570, ffff88800994e618) [ 32.166948] [ 32.167183] The buggy address belongs to the physical page: [ 32.167871] page:00000000a0601d45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x994e [ 32.168994] memcg:ffff88800dfce101 [ 32.169433] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.170104] page_type: 0xffffffff() [ 32.170570] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.171541] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfce101 [ 32.172484] page dumped because: kasan: bad access detected [ 32.173169] [ 32.173390] Memory state around the buggy address: [ 32.173992] ffff88800994e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.174876] ffff88800994e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.175775] >ffff88800994e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.176661] ^ [ 32.177358] ffff88800994e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.178249] ffff88800994e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.179129] ================================================================== [ 32.180113] Disabling lock debugging due to kernel taint [ 33.782691] BUG: Bad rss-counter state mm:0000000034ca3b5f type:MM_FILEPAGES val:33 [ 33.784429] BUG: Bad rss-counter state mm:0000000034ca3b5f type:MM_ANONPAGES val:22 [ 34.239435] BUG: Bad rss-counter state mm:00000000b6c0fe21 type:MM_FILEPAGES val:33 [ 34.240651] BUG: Bad rss-counter state mm:00000000b6c0fe21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62979' (ECDSA) to the list of known hosts. 2023/06/20 07:31:11 fuzzer started 2023/06/20 07:31:11 dialing manager at localhost:44161 2023/06/20 07:31:11 checking machine... 2023/06/20 07:31:11 checking revisions... [ 34.946796] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:31:11 testing simple program... [ 34.990967] cgroup: Unknown subsys name 'net' [ 35.029638] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:10 Registers: info registers vcpu 0 RAX=0000000000000057 RBX=000055af49418360 RCX=000000000000000c RDX=0000000000000014 RSI=000055af494184f8 RDI=000055af494184f0 RBP=ffffffffffffffff RSP=00007ffd57eb08f8 R8 =00000000649155be R9 =00007ffd57f50080 R10=00007ffd57f50080 R11=0000000000000202 R12=0000000000000001 R13=0000000000000014 R14=0000000000000000 R15=0000000000000000 RIP=00007f2fd356ed20 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2fd2ab8900 00000000 00000000 GS =0000 0000000000000000 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=00007f2fd1ead6e0 CR3=000000000c6be000 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=93d78b989fbce1bb624fc2d78cac4f76 XMM02=ec2efd57dc4c00df000000000011d328 XMM03=6e3f3cd644cbbf0d000000000011d3f8 XMM04=e77a02b1a29ac55500000000000ae988 XMM05=b25f039e7d7193210000000000135158 XMM06=806171799158d9670000000000133f48 XMM07=fb795ef6d65770560000000000124560 XMM08=2c67c8bc2e329bc3000000000011d398 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888016e8b680 RSI=0000000000000000 RDI=ffffffff87f34480 RBP=ffff88801614eca8 RSP=ffff88800fc37b50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88801614eca8 R13=ffff88801614e9e8 R14=ffff88801614e8c8 R15=ffff88801614e918 RIP=ffffffff813533c6 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 00007f967c369900 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=00007f967c920618 CR3=0000000019f44000 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=563412feff00545000000000000080fe 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