syzkaller login: [ 30.161727] BUG: Bad rss-counter state mm:00000000be9c531d type:MM_FILEPAGES val:33 [ 30.163259] BUG: Bad rss-counter state mm:00000000be9c531d type:MM_ANONPAGES val:22 [ 30.241300] ================================================================== [ 30.242191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.243121] Read of size 8 at addr ffff888018d886b0 by task sshd/220 [ 30.243913] [ 30.244130] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.245097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.246073] Call Trace: [ 30.246390] [ 30.246672] dump_stack_lvl+0x91/0xf0 [ 30.247168] print_report+0xcc/0x620 [ 30.247685] ? __virt_addr_valid+0x102/0x340 [ 30.248236] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.248854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.249470] kasan_report+0xbe/0xf0 [ 30.249947] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250570] vma_interval_tree_remove+0xc75/0xec0 [ 30.251178] vma_prepare+0xc54/0x11a0 [ 30.251678] __split_vma+0x5af/0x950 [ 30.252159] ? __pfx___split_vma+0x10/0x10 [ 30.252695] ? find_held_lock+0x2c/0x110 [ 30.253216] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.253786] ? lock_is_held_type+0x9f/0x120 [ 30.254329] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.254944] ? mtree_range_walk+0x632/0x900 [ 30.255504] ? mas_walk+0x5c7/0x7c0 [ 30.255989] do_vmi_munmap+0x1f1/0x2b0 [ 30.256480] mmap_region+0x1f9/0x2660 [ 30.256970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.257488] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.258206] ? __pfx_lock_acquire+0x10/0x10 [ 30.258739] ? __pfx_mmap_region+0x10/0x10 [ 30.259268] ? security_mmap_addr+0x7d/0xa0 [ 30.259833] ? get_unmapped_area+0x1f5/0x3f0 [ 30.260389] do_mmap+0x854/0xf00 [ 30.260832] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.261331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.261903] ksys_mmap_pgoff+0x3af/0x500 [ 30.262409] do_syscall_64+0x3f/0x90 [ 30.262895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.263544] RIP: 0033:0x7f9025d77d82 [ 30.264014] 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 [ 30.266143] RSP: 002b:00007ffe1a22f2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.267059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9025d77d82 [ 30.267940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90251b1000 [ 30.268804] RBP: 00007f90251b1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.269658] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644ca99dd90 [ 30.270517] R13: 00007ffe1a22f2d0 R14: 00007ffe1a22f300 R15: 00007ffe1a22f660 [ 30.271381] [ 30.271692] [ 30.271907] Allocated by task 213: [ 30.272336] kasan_save_stack+0x22/0x50 [ 30.272843] kasan_set_track+0x25/0x30 [ 30.273346] __kasan_slab_alloc+0x59/0x70 [ 30.273870] kmem_cache_alloc+0x16b/0x370 [ 30.274392] vm_area_dup+0x20/0x160 [ 30.274850] __split_vma+0x170/0x950 [ 30.275315] split_vma+0xc6/0x110 [ 30.275767] mprotect_fixup+0x8d2/0xb30 [ 30.276268] do_mprotect_pkey+0x87e/0xd40 [ 30.276792] __x64_sys_mprotect+0x78/0xc0 [ 30.277308] do_syscall_64+0x3f/0x90 [ 30.277795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278451] [ 30.278666] Freed by task 13: [ 30.279052] kasan_save_stack+0x22/0x50 [ 30.279562] kasan_set_track+0x25/0x30 [ 30.280078] kasan_save_free_info+0x2b/0x50 [ 30.280615] __kasan_slab_free+0x10a/0x190 [ 30.281159] kmem_cache_free+0x10d/0x4d0 [ 30.281670] rcu_core+0x8c8/0x2860 [ 30.282118] __do_softirq+0x1b7/0x7d4 [ 30.282607] [ 30.282831] Last potentially related work creation: [ 30.283423] kasan_save_stack+0x22/0x50 [ 30.283945] __kasan_record_aux_stack+0x8e/0xa0 [ 30.284515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.285174] remove_vma+0x139/0x170 [ 30.285631] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.286210] do_vmi_munmap+0x1f1/0x2b0 [ 30.286698] __vm_munmap+0x138/0x3a0 [ 30.287181] __x64_sys_munmap+0x59/0x80 [ 30.287713] do_syscall_64+0x3f/0x90 [ 30.288195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.288857] [ 30.289072] The buggy address belongs to the object at ffff888018d88658 [ 30.289072] which belongs to the cache vm_area_struct of size 168 [ 30.290587] The buggy address is located 88 bytes inside of [ 30.290587] freed 168-byte region [ffff888018d88658, ffff888018d88700) [ 30.292031] [ 30.292256] The buggy address belongs to the physical page: [ 30.292918] page:000000002b07c85d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d88 [ 30.294024] memcg:ffff888015e46301 [ 30.294453] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.295101] page_type: 0xffffffff() [ 30.295563] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.296507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e46301 [ 30.297420] page dumped because: kasan: bad access detected [ 30.298098] [ 30.298319] Memory state around the buggy address: [ 30.298910] ffff888018d88580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.299807] ffff888018d88600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.300682] >ffff888018d88680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.301563] ^ [ 30.302158] ffff888018d88700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.303018] ffff888018d88780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.303875] ================================================================== [ 30.304966] Disabling lock debugging due to kernel taint [ 32.118306] BUG: Bad rss-counter state mm:0000000024e399f3 type:MM_FILEPAGES val:33 [ 32.119413] BUG: Bad rss-counter state mm:0000000024e399f3 type:MM_ANONPAGES val:22 [ 32.608393] BUG: Bad rss-counter state mm:000000001cf3c8e6 type:MM_FILEPAGES val:33 [ 32.609551] BUG: Bad rss-counter state mm:000000001cf3c8e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65487' (ECDSA) to the list of known hosts. 2023/06/21 09:24:21 fuzzer started 2023/06/21 09:24:21 dialing manager at localhost:36067 2023/06/21 09:24:21 checking machine... 2023/06/21 09:24:21 checking revisions... [ 33.304433] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:24:21 testing simple program... [ 33.361513] cgroup: Unknown subsys name 'net' [ 33.412187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=1ffff11001c40804 RSI=ffffffff8171b153 RDI=ffff88800d03bb28 RBP=ffff88800e204000 RSP=ffff888018c07e78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d03b680 R13=00007f2f7444c50c R14=ffff88800e204010 R15=0000000000000000 RIP=ffffffff8171b16a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2f7438f900 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=00007f2f7444c50c CR3=000000000f152000 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=6720646572637465733a4d41503d706f 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=000000165ff60c8c RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000054629 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f18dc R11=ffff88806cf09ff8 R12=0000000000054629 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000012 [----A--] 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 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=00007fcc78f23820 CR3=000000000fd7e000 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=2030323a34323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a34323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000