syzkaller login: [ 30.467703] BUG: Bad rss-counter state mm:00000000018ea643 type:MM_FILEPAGES val:33 [ 30.468940] BUG: Bad rss-counter state mm:00000000018ea643 type:MM_ANONPAGES val:22 [ 30.509844] ================================================================== [ 30.510762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.511741] Read of size 8 at addr ffff88800e0aa5c8 by task sshd/222 [ 30.512514] [ 30.512728] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.513601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.514578] Call Trace: [ 30.514905] [ 30.515190] dump_stack_lvl+0x91/0xf0 [ 30.515682] print_report+0xcc/0x620 [ 30.516166] ? __virt_addr_valid+0x102/0x340 [ 30.516717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.517332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.517954] kasan_report+0xbe/0xf0 [ 30.518436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.519072] vma_interval_tree_remove+0xc75/0xec0 [ 30.519685] vma_prepare+0xc54/0x11a0 [ 30.520167] __split_vma+0x5af/0x950 [ 30.520643] ? __pfx___split_vma+0x10/0x10 [ 30.521178] ? find_held_lock+0x2c/0x110 [ 30.521696] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.522280] ? lock_is_held_type+0x9f/0x120 [ 30.522822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.523456] ? mtree_range_walk+0x632/0x900 [ 30.524008] ? mas_walk+0x5c7/0x7c0 [ 30.524492] do_vmi_munmap+0x1f1/0x2b0 [ 30.524987] mmap_region+0x1f9/0x2660 [ 30.525468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.525985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.526705] ? __pfx_lock_acquire+0x10/0x10 [ 30.527249] ? __pfx_mmap_region+0x10/0x10 [ 30.527790] ? security_mmap_addr+0x7d/0xa0 [ 30.528325] ? get_unmapped_area+0x1f5/0x3f0 [ 30.528872] do_mmap+0x854/0xf00 [ 30.529315] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.529814] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.530386] ksys_mmap_pgoff+0x3af/0x500 [ 30.530908] do_syscall_64+0x3f/0x90 [ 30.531390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.532076] RIP: 0033:0x7fd987058d82 [ 30.532537] 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 [ 30.534833] RSP: 002b:00007ffee18cb868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.535801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd987058d82 [ 30.536678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd986492000 [ 30.537544] RBP: 00007fd986492000 R08: 0000000000000009 R09: 0000000000001000 [ 30.538400] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627b0de0b20 [ 30.539258] R13: 00007ffee18cb880 R14: 00007ffee18cb8b0 R15: 00007ffee18cbc10 [ 30.540126] [ 30.540421] [ 30.540639] Allocated by task 215: [ 30.541068] kasan_save_stack+0x22/0x50 [ 30.541575] kasan_set_track+0x25/0x30 [ 30.542070] __kasan_slab_alloc+0x59/0x70 [ 30.542598] kmem_cache_alloc+0x16b/0x370 [ 30.543141] vm_area_dup+0x20/0x160 [ 30.543593] __split_vma+0x170/0x950 [ 30.544068] split_vma+0xc6/0x110 [ 30.544507] mprotect_fixup+0x8d2/0xb30 [ 30.545011] do_mprotect_pkey+0x87e/0xd40 [ 30.545530] __x64_sys_mprotect+0x78/0xc0 [ 30.546051] do_syscall_64+0x3f/0x90 [ 30.546529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.547185] [ 30.547406] Freed by task 215: [ 30.547803] kasan_save_stack+0x22/0x50 [ 30.548313] kasan_set_track+0x25/0x30 [ 30.548818] kasan_save_free_info+0x2b/0x50 [ 30.549394] __kasan_slab_free+0x10a/0x190 [ 30.549965] kmem_cache_free+0x10d/0x4d0 [ 30.550476] rcu_core+0x8c8/0x2860 [ 30.550938] __do_softirq+0x1b7/0x7d4 [ 30.551415] [ 30.551630] Last potentially related work creation: [ 30.552213] kasan_save_stack+0x22/0x50 [ 30.552724] __kasan_record_aux_stack+0x8e/0xa0 [ 30.553297] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.553937] remove_vma+0x139/0x170 [ 30.554386] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.554951] do_vmi_munmap+0x1f1/0x2b0 [ 30.555437] __vm_munmap+0x138/0x3a0 [ 30.555904] __x64_sys_munmap+0x59/0x80 [ 30.556402] do_syscall_64+0x3f/0x90 [ 30.556882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.557528] [ 30.557755] Second to last potentially related work creation: [ 30.558494] kasan_save_stack+0x22/0x50 [ 30.559032] __kasan_record_aux_stack+0x8e/0xa0 [ 30.559610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.560260] remove_vma+0x139/0x170 [ 30.560720] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.561298] do_vmi_munmap+0x1f1/0x2b0 [ 30.561785] mmap_region+0x1f9/0x2660 [ 30.562278] do_mmap+0x854/0xf00 [ 30.562714] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.563229] ksys_mmap_pgoff+0x3af/0x500 [ 30.563743] do_syscall_64+0x3f/0x90 [ 30.564228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.564875] [ 30.565087] The buggy address belongs to the object at ffff88800e0aa570 [ 30.565087] which belongs to the cache vm_area_struct of size 168 [ 30.566602] The buggy address is located 88 bytes inside of [ 30.566602] freed 168-byte region [ffff88800e0aa570, ffff88800e0aa618) [ 30.568037] [ 30.568252] The buggy address belongs to the physical page: [ 30.568907] page:000000008e3eb387 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0aa [ 30.569996] memcg:ffff88800f0f9f01 [ 30.570419] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.571140] page_type: 0xffffffff() [ 30.571596] raw: 0100000000000200 ffff8880087a0c80 ffffea000025fa40 dead000000000007 [ 30.572523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0f9f01 [ 30.573431] page dumped because: kasan: bad access detected [ 30.574089] [ 30.574307] Memory state around the buggy address: [ 30.574893] ffff88800e0aa480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.575766] ffff88800e0aa500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.576621] >ffff88800e0aa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.577468] ^ [ 30.578139] ffff88800e0aa600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.579007] ffff88800e0aa680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.579860] ================================================================== [ 30.581046] Disabling lock debugging due to kernel taint [ 32.329820] BUG: Bad rss-counter state mm:00000000989854be type:MM_FILEPAGES val:33 [ 32.330887] BUG: Bad rss-counter state mm:00000000989854be type:MM_ANONPAGES val:22 [ 32.708912] BUG: Bad rss-counter state mm:000000008fcc36ec type:MM_FILEPAGES val:33 [ 32.710160] BUG: Bad rss-counter state mm:000000008fcc36ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43471' (ECDSA) to the list of known hosts. 2023/06/21 06:09:26 fuzzer started 2023/06/21 06:09:26 dialing manager at localhost:36067 2023/06/21 06:09:26 checking machine... 2023/06/21 06:09:26 checking revisions... [ 33.378817] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:09:26 testing simple program... [ 33.423593] cgroup: Unknown subsys name 'net' [ 33.487563] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800dbdf698 RCX=0000000000000001 RDX=1ffff11001b7bede RSI=ffff88800dbdfbb8 RDI=ffffffff838728bc RBP=ffff88800dbdf6f0 RSP=ffff88800dbdf680 R8 =0000000000000001 R9 =ffff88800dbdf6d8 R10=0000000000038001 R11=000000000008b5c1 R12=ffff88800dbdf760 R13=0000000000000000 R14=ffff88800f27b680 R15=0000000000092cc0 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007fb0dc4ef900 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=00007ffc44a03000 CR3=000000000de44000 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=ffff88806cf0a001 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=ffff88806cf09aa0 RSI=ffff88806cf09a68 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff81131cda RFL=00000202 [-------] 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=00007fb00dd3a1f0 CR3=0000000018104000 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=2036323a39303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39303a3630203132 XMM08=64696720303d64697520612f6e3d6469 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000