syzkaller login: [ 30.813780] BUG: Bad rss-counter state mm:00000000343b0103 type:MM_FILEPAGES val:33 [ 30.814422] BUG: Bad rss-counter state mm:00000000343b0103 type:MM_ANONPAGES val:22 [ 30.930407] ================================================================== [ 30.931858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.933267] Read of size 8 at addr ffff888019c1f4e0 by task sshd/220 [ 30.934449] [ 30.934783] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.936078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.937390] Call Trace: [ 30.937822] [ 30.938194] dump_stack_lvl+0x91/0xf0 [ 30.938847] print_report+0xcc/0x620 [ 30.939515] ? __virt_addr_valid+0x102/0x340 [ 30.940263] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941944] kasan_report+0xbe/0xf0 [ 30.942604] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.943509] vma_interval_tree_remove+0xc75/0xec0 [ 30.944341] vma_prepare+0xc54/0x11a0 [ 30.945012] __split_vma+0x5af/0x950 [ 30.945666] ? __pfx___split_vma+0x10/0x10 [ 30.946389] ? find_held_lock+0x2c/0x110 [ 30.947102] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.947816] ? lock_is_held_type+0x9f/0x120 [ 30.948366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.948987] ? mtree_range_walk+0x632/0x900 [ 30.949552] ? mas_walk+0x5c7/0x7c0 [ 30.950038] do_vmi_munmap+0x1f1/0x2b0 [ 30.950525] mmap_region+0x1f9/0x2660 [ 30.951036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.951553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.952278] ? __pfx_lock_acquire+0x10/0x10 [ 30.952813] ? __pfx_mmap_region+0x10/0x10 [ 30.953359] ? security_mmap_addr+0x7d/0xa0 [ 30.953908] ? get_unmapped_area+0x1f5/0x3f0 [ 30.954455] do_mmap+0x854/0xf00 [ 30.954907] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.955437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.956005] ksys_mmap_pgoff+0x3af/0x500 [ 30.956517] do_syscall_64+0x3f/0x90 [ 30.957005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957681] RIP: 0033:0x7f035ec52d82 [ 30.958147] 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 [ 30.960362] RSP: 002b:00007ffff8c911e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.961275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f035ec52d82 [ 30.962122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f035e08c000 [ 30.962971] RBP: 00007f035e08c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.963821] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9f47fef70 [ 30.964685] R13: 00007ffff8c91200 R14: 00007ffff8c91230 R15: 00007ffff8c91590 [ 30.965549] [ 30.965848] [ 30.966067] Allocated by task 213: [ 30.966502] kasan_save_stack+0x22/0x50 [ 30.967017] kasan_set_track+0x25/0x30 [ 30.967527] __kasan_slab_alloc+0x59/0x70 [ 30.968066] kmem_cache_alloc+0x16b/0x370 [ 30.968581] vm_area_dup+0x20/0x160 [ 30.969040] __split_vma+0x170/0x950 [ 30.969505] split_vma+0xc6/0x110 [ 30.969946] mprotect_fixup+0x8d2/0xb30 [ 30.970451] do_mprotect_pkey+0x87e/0xd40 [ 30.970976] __x64_sys_mprotect+0x78/0xc0 [ 30.971506] do_syscall_64+0x3f/0x90 [ 30.971985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.972621] [ 30.972841] Freed by task 13: [ 30.973222] kasan_save_stack+0x22/0x50 [ 30.973721] kasan_set_track+0x25/0x30 [ 30.974220] kasan_save_free_info+0x2b/0x50 [ 30.974743] __kasan_slab_free+0x10a/0x190 [ 30.975276] kmem_cache_free+0x10d/0x4d0 [ 30.975800] rcu_core+0x8c8/0x2860 [ 30.976245] __do_softirq+0x1b7/0x7d4 [ 30.976724] [ 30.976940] Last potentially related work creation: [ 30.977525] kasan_save_stack+0x22/0x50 [ 30.978026] __kasan_record_aux_stack+0x8e/0xa0 [ 30.978598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.979237] remove_vma+0x139/0x170 [ 30.979694] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.980252] do_vmi_munmap+0x1f1/0x2b0 [ 30.980738] __vm_munmap+0x138/0x3a0 [ 30.981201] __x64_sys_munmap+0x59/0x80 [ 30.981699] do_syscall_64+0x3f/0x90 [ 30.982185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.982829] [ 30.983042] The buggy address belongs to the object at ffff888019c1f488 [ 30.983042] which belongs to the cache vm_area_struct of size 168 [ 30.984506] The buggy address is located 88 bytes inside of [ 30.984506] freed 168-byte region [ffff888019c1f488, ffff888019c1f530) [ 30.985898] [ 30.986117] The buggy address belongs to the physical page: [ 30.986777] page:000000001d5f7cf0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c1f [ 30.987891] memcg:ffff88800da24901 [ 30.988319] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.988969] page_type: 0xffffffff() [ 30.989416] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.990331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da24901 [ 30.991235] page dumped because: kasan: bad access detected [ 30.991914] [ 30.992163] Memory state around the buggy address: [ 30.992824] ffff888019c1f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.993818] ffff888019c1f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.994803] >ffff888019c1f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.995817] ^ [ 30.996680] ffff888019c1f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.997663] ffff888019c1f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.998637] ================================================================== [ 30.999770] Disabling lock debugging due to kernel taint [ 32.881092] BUG: Bad rss-counter state mm:0000000066a07c86 type:MM_FILEPAGES val:33 [ 32.882500] BUG: Bad rss-counter state mm:0000000066a07c86 type:MM_ANONPAGES val:22 [ 33.317431] BUG: Bad rss-counter state mm:00000000e2e66867 type:MM_FILEPAGES val:33 [ 33.318608] BUG: Bad rss-counter state mm:00000000e2e66867 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42891' (ECDSA) to the list of known hosts. 2023/06/21 05:03:26 fuzzer started 2023/06/21 05:03:27 dialing manager at localhost:36067 2023/06/21 05:03:27 checking machine... 2023/06/21 05:03:27 checking revisions... [ 34.041910] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:03:27 testing simple program... [ 34.094030] cgroup: Unknown subsys name 'net' [ 34.155829] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:03:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800daa7a98 RCX=0000000000000001 RDX=1ffff11001b54f5e RSI=ffff88800daa7df0 RDI=ffffffff81370a8a RBP=ffff88800daa7af0 RSP=ffff88800daa7a80 R8 =0000000000000001 R9 =ffff88800daa7ad8 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88800daa7b60 R13=0000000000000000 R14=ffff88800c6eb680 R15=ffff88800c57d400 RIP=ffffffff811303b2 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 00007f796a236900 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=00007ffdd4e93000 CR3=00000000164ac000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fbd495d1ef0 CR3=000000000f610000 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=2036323a33303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a33303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000