syzkaller login: [ 30.271129] BUG: Bad rss-counter state mm:00000000c06f3664 type:MM_FILEPAGES val:33 [ 30.272314] BUG: Bad rss-counter state mm:00000000c06f3664 type:MM_ANONPAGES val:22 [ 30.487466] ================================================================== [ 30.488068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.489192] Read of size 8 at addr ffff88801a0716b0 by task sshd/222 [ 30.489697] [ 30.489842] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.490402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.491029] Call Trace: [ 30.491243] [ 30.491432] dump_stack_lvl+0x91/0xf0 [ 30.491761] print_report+0xcc/0x620 [ 30.492085] ? __virt_addr_valid+0x102/0x340 [ 30.492462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.496874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.497286] kasan_report+0xbe/0xf0 [ 30.497605] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.498013] vma_interval_tree_remove+0xc75/0xec0 [ 30.498413] vma_prepare+0xc54/0x11a0 [ 30.498727] __split_vma+0x5af/0x950 [ 30.499034] ? __pfx___split_vma+0x10/0x10 [ 30.499379] ? find_held_lock+0x2c/0x110 [ 30.499721] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.500092] ? lock_is_held_type+0x9f/0x120 [ 30.500445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.500942] ? mtree_range_walk+0x632/0x900 [ 30.501306] ? mas_walk+0x5c7/0x7c0 [ 30.501623] do_vmi_munmap+0x1f1/0x2b0 [ 30.501948] mmap_region+0x1f9/0x2660 [ 30.502268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.502608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.503080] ? __pfx_lock_acquire+0x10/0x10 [ 30.503429] ? __pfx_mmap_region+0x10/0x10 [ 30.503775] ? security_mmap_addr+0x7d/0xa0 [ 30.504127] ? get_unmapped_area+0x1f5/0x3f0 [ 30.504516] do_mmap+0x854/0xf00 [ 30.504804] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.505130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.505505] ksys_mmap_pgoff+0x3af/0x500 [ 30.505847] do_syscall_64+0x3f/0x90 [ 30.506171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.506606] RIP: 0033:0x7f616a06bd82 [ 30.506915] 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 [ 30.508291] RSP: 002b:00007fff848b9638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.508910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f616a06bd82 [ 30.509464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61694a5000 [ 30.510007] RBP: 00007f61694a5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.510555] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a09c0ab20 [ 30.511105] R13: 00007fff848b9650 R14: 00007fff848b9680 R15: 00007fff848b99e0 [ 30.511663] [ 30.511856] [ 30.512001] Allocated by task 215: [ 30.512283] kasan_save_stack+0x22/0x50 [ 30.512607] kasan_set_track+0x25/0x30 [ 30.512912] __kasan_slab_alloc+0x59/0x70 [ 30.513254] kmem_cache_alloc+0x16b/0x370 [ 30.513596] vm_area_dup+0x20/0x160 [ 30.513894] __split_vma+0x170/0x950 [ 30.514200] split_vma+0xc6/0x110 [ 30.514484] mprotect_fixup+0x8d2/0xb30 [ 30.514804] do_mprotect_pkey+0x87e/0xd40 [ 30.515146] __x64_sys_mprotect+0x78/0xc0 [ 30.515487] do_syscall_64+0x3f/0x90 [ 30.515800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.516223] [ 30.516367] Freed by task 215: [ 30.516651] kasan_save_stack+0x22/0x50 [ 30.516985] kasan_set_track+0x25/0x30 [ 30.517317] kasan_save_free_info+0x2b/0x50 [ 30.517670] __kasan_slab_free+0x10a/0x190 [ 30.518020] kmem_cache_free+0x10d/0x4d0 [ 30.518347] rcu_core+0x8c8/0x2860 [ 30.518647] __do_softirq+0x1b7/0x7d4 [ 30.518957] [ 30.519100] Last potentially related work creation: [ 30.519482] kasan_save_stack+0x22/0x50 [ 30.519822] __kasan_record_aux_stack+0x8e/0xa0 [ 30.520197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.520636] remove_vma+0x139/0x170 [ 30.520935] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.521299] do_vmi_munmap+0x1f1/0x2b0 [ 30.521627] __vm_munmap+0x138/0x3a0 [ 30.521939] __x64_sys_munmap+0x59/0x80 [ 30.522272] do_syscall_64+0x3f/0x90 [ 30.522586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.522992] [ 30.523125] The buggy address belongs to the object at ffff88801a071658 [ 30.523125] which belongs to the cache vm_area_struct of size 168 [ 30.524132] The buggy address is located 88 bytes inside of [ 30.524132] freed 168-byte region [ffff88801a071658, ffff88801a071700) [ 30.525142] [ 30.525284] The buggy address belongs to the physical page: [ 30.525710] page:000000007c695bba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a071 [ 30.526410] memcg:ffff888016a63601 [ 30.526691] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.527110] page_type: 0xffffffff() [ 30.527404] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.528007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a63601 [ 30.528623] page dumped because: kasan: bad access detected [ 30.529061] [ 30.529200] Memory state around the buggy address: [ 30.529585] ffff88801a071580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.530153] ffff88801a071600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.530721] >ffff88801a071680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.531283] ^ [ 30.531669] ffff88801a071700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.532232] ffff88801a071780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.532818] ================================================================== [ 30.533756] Disabling lock debugging due to kernel taint [ 32.834634] BUG: Bad rss-counter state mm:0000000062581aa8 type:MM_FILEPAGES val:33 [ 32.835285] BUG: Bad rss-counter state mm:0000000062581aa8 type:MM_ANONPAGES val:22 [ 33.421628] BUG: Bad rss-counter state mm:000000001fbdb66d type:MM_FILEPAGES val:33 [ 33.422670] BUG: Bad rss-counter state mm:000000001fbdb66d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38443' (ECDSA) to the list of known hosts. 2023/06/20 10:23:41 fuzzer started 2023/06/20 10:23:41 dialing manager at localhost:44161 2023/06/20 10:23:41 checking machine... 2023/06/20 10:23:41 checking revisions... [ 34.233526] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:23:42 testing simple program... [ 34.265661] cgroup: Unknown subsys name 'net' [ 34.348479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:23:41 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=dffffc0000000000 RCX=0000000000000100 RDX=ffff88800c56d1c0 RSI=ffffffff8396b656 RDI=0000000000000003 RBP=ffff88806ce09928 RSP=ffff88806ce097f0 R8 =0000000000000003 R9 =0000000000000003 R10=0000000000000002 R11=40b96d3c0000b405 R12=ffff888015851500 R13=ffff88800db54b40 R14=ffff88806ce09868 R15=0000000000000002 RIP=ffffffff814c07eb 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 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=00007f7e67aaa328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=0000000000000007 RBX=ffff888016068e40 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016068e50 RBP=ffffffff848ff060 RSP=ffff88801613f8a0 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff87b86c40 R13=0000000000000002 R14=ffff888016068e88 R15=ffff888016068e40 RIP=ffffffff812dfc07 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 00007fa889a44900 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=00007fbbccdff050 CR3=0000000009b6e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000