syzkaller login: [ 30.922035] BUG: Bad rss-counter state mm:0000000050216c77 type:MM_FILEPAGES val:33 [ 30.923033] BUG: Bad rss-counter state mm:0000000050216c77 type:MM_ANONPAGES val:22 [ 31.088404] ================================================================== [ 31.089358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.090324] Read of size 8 at addr ffff888018ebe5c8 by task sshd/220 [ 31.091095] [ 31.091416] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.092296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.093375] Call Trace: [ 31.093703] [ 31.093985] dump_stack_lvl+0x91/0xf0 [ 31.094507] print_report+0xcc/0x620 [ 31.094998] ? __virt_addr_valid+0x102/0x340 [ 31.095574] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.096200] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.096827] kasan_report+0xbe/0xf0 [ 31.097336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.097979] vma_interval_tree_remove+0xc75/0xec0 [ 31.098619] vma_prepare+0xc54/0x11a0 [ 31.099098] __split_vma+0x5af/0x950 [ 31.099590] ? __pfx___split_vma+0x10/0x10 [ 31.100130] ? find_held_lock+0x2c/0x110 [ 31.100675] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.101271] ? lock_is_held_type+0x9f/0x120 [ 31.101848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.102472] ? mtree_range_walk+0x632/0x900 [ 31.103048] ? mas_walk+0x5c7/0x7c0 [ 31.103546] do_vmi_munmap+0x1f1/0x2b0 [ 31.104050] mmap_region+0x1f9/0x2660 [ 31.104557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.105079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.105832] ? __pfx_lock_acquire+0x10/0x10 [ 31.106401] ? __pfx_mmap_region+0x10/0x10 [ 31.106952] ? security_mmap_addr+0x7d/0xa0 [ 31.107508] ? get_unmapped_area+0x1f5/0x3f0 [ 31.108070] do_mmap+0x854/0xf00 [ 31.108542] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.109041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.109638] ksys_mmap_pgoff+0x3af/0x500 [ 31.110154] do_syscall_64+0x3f/0x90 [ 31.110657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.111324] RIP: 0033:0x7fc4148e9d82 [ 31.111792] 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 [ 31.114013] RSP: 002b:00007ffce1d90428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.114939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4148e9d82 [ 31.115813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc413d23000 [ 31.116680] RBP: 00007fc413d23000 R08: 0000000000000009 R09: 0000000000001000 [ 31.117568] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561477b53b20 [ 31.118433] R13: 00007ffce1d90440 R14: 00007ffce1d90470 R15: 00007ffce1d907d0 [ 31.119302] [ 31.119607] [ 31.119825] Allocated by task 213: [ 31.120252] kasan_save_stack+0x22/0x50 [ 31.120792] kasan_set_track+0x25/0x30 [ 31.121329] __kasan_slab_alloc+0x59/0x70 [ 31.121873] kmem_cache_alloc+0x16b/0x370 [ 31.122415] vm_area_dup+0x20/0x160 [ 31.122875] __split_vma+0x170/0x950 [ 31.123354] split_vma+0xc6/0x110 [ 31.123799] mprotect_fixup+0x8d2/0xb30 [ 31.124304] do_mprotect_pkey+0x87e/0xd40 [ 31.124841] __x64_sys_mprotect+0x78/0xc0 [ 31.125406] do_syscall_64+0x3f/0x90 [ 31.125881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126541] [ 31.126760] Freed by task 213: [ 31.127163] kasan_save_stack+0x22/0x50 [ 31.127684] kasan_set_track+0x25/0x30 [ 31.128187] kasan_save_free_info+0x2b/0x50 [ 31.128737] __kasan_slab_free+0x10a/0x190 [ 31.129294] kmem_cache_free+0x10d/0x4d0 [ 31.129822] rcu_core+0x8c8/0x2860 [ 31.130270] __do_softirq+0x1b7/0x7d4 [ 31.130779] [ 31.130991] Last potentially related work creation: [ 31.131595] kasan_save_stack+0x22/0x50 [ 31.132103] __kasan_record_aux_stack+0x8e/0xa0 [ 31.132689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.133382] remove_vma+0x139/0x170 [ 31.133834] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.134424] do_vmi_munmap+0x1f1/0x2b0 [ 31.134918] __vm_munmap+0x138/0x3a0 [ 31.135407] __x64_sys_munmap+0x59/0x80 [ 31.135903] do_syscall_64+0x3f/0x90 [ 31.136399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137043] [ 31.137274] The buggy address belongs to the object at ffff888018ebe570 [ 31.137274] which belongs to the cache vm_area_struct of size 168 [ 31.138817] The buggy address is located 88 bytes inside of [ 31.138817] freed 168-byte region [ffff888018ebe570, ffff888018ebe618) [ 31.140715] [ 31.141008] The buggy address belongs to the physical page: [ 31.141805] page:00000000139f5cfe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ebe [ 31.142945] memcg:ffff888015e8eb01 [ 31.143411] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.144078] page_type: 0xffffffff() [ 31.144549] raw: 0100000000000200 ffff8880087a0c80 ffffea000051f1c0 dead000000000008 [ 31.145507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e8eb01 [ 31.146452] page dumped because: kasan: bad access detected [ 31.147122] [ 31.147351] Memory state around the buggy address: [ 31.147951] ffff888018ebe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.148842] ffff888018ebe500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.149738] >ffff888018ebe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.150617] ^ [ 31.151295] ffff888018ebe600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.152178] ffff888018ebe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.153060] ================================================================== [ 31.154099] Disabling lock debugging due to kernel taint [ 32.959826] BUG: Bad rss-counter state mm:000000000e7d0adf type:MM_FILEPAGES val:33 [ 32.960951] BUG: Bad rss-counter state mm:000000000e7d0adf type:MM_ANONPAGES val:22 [ 33.415584] BUG: Bad rss-counter state mm:0000000082a8c5ff type:MM_FILEPAGES val:33 [ 33.416788] BUG: Bad rss-counter state mm:0000000082a8c5ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55866' (ECDSA) to the list of known hosts. 2023/06/20 21:21:47 fuzzer started 2023/06/20 21:21:47 dialing manager at localhost:36067 2023/06/20 21:21:47 checking machine... 2023/06/20 21:21:47 checking revisions... [ 34.092062] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:21:47 testing simple program... [ 34.130200] cgroup: Unknown subsys name 'net' [ 34.172515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:21:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=1ffff1100d9c132e RSP=ffff88806ce09960 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88801036cd90 RIP=ffffffff812d86d9 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=00007fba329fb170 CR3=0000000018e24000 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=2036343a31323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31323a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000014 RCX=ffffffff8184d087 RDX=ffff8880169251c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019b98614 RSP=ffff88801c9d7b98 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888019b98600 R13=0000000000000000 R14=0000000000000001 R15=ffffea000066e600 RIP=ffffffff814c02c5 RFL=00000293 [--S-A-C] 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 00007f7a21678900 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=00007ffe6a081000 CR3=000000001c9fa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000