syzkaller login: [ 30.077947] BUG: Bad rss-counter state mm:00000000491e9c7d type:MM_FILEPAGES val:33 [ 30.079675] BUG: Bad rss-counter state mm:00000000491e9c7d type:MM_ANONPAGES val:22 [ 30.243076] ================================================================== [ 30.243980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.244909] Read of size 8 at addr ffff888019e2fd08 by task sshd/220 [ 30.245670] [ 30.245896] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.246867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.247840] Call Trace: [ 30.248156] [ 30.248454] dump_stack_lvl+0x91/0xf0 [ 30.248940] print_report+0xcc/0x620 [ 30.249423] ? __virt_addr_valid+0x102/0x340 [ 30.249993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250610] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251222] kasan_report+0xbe/0xf0 [ 30.251691] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252303] vma_interval_tree_remove+0xc75/0xec0 [ 30.252900] vma_prepare+0xc54/0x11a0 [ 30.253372] __split_vma+0x5af/0x950 [ 30.253853] ? __pfx___split_vma+0x10/0x10 [ 30.254383] ? find_held_lock+0x2c/0x110 [ 30.254903] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.255471] ? lock_is_held_type+0x9f/0x120 [ 30.256003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.256604] ? mtree_range_walk+0x632/0x900 [ 30.257156] ? mas_walk+0x5c7/0x7c0 [ 30.257623] do_vmi_munmap+0x1f1/0x2b0 [ 30.258128] mmap_region+0x1f9/0x2660 [ 30.258610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.259114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.259833] ? __pfx_lock_acquire+0x10/0x10 [ 30.260364] ? __pfx_mmap_region+0x10/0x10 [ 30.260897] ? security_mmap_addr+0x7d/0xa0 [ 30.261426] ? get_unmapped_area+0x1f5/0x3f0 [ 30.261998] do_mmap+0x854/0xf00 [ 30.262446] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.262945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.263504] ksys_mmap_pgoff+0x3af/0x500 [ 30.264006] do_syscall_64+0x3f/0x90 [ 30.264481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265121] RIP: 0033:0x7f50254efd82 [ 30.265579] 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 [ 30.267692] RSP: 002b:00007ffdb6156ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.268594] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50254efd82 [ 30.269438] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5024929000 [ 30.270308] RBP: 00007f5024929000 R08: 0000000000000009 R09: 0000000000001000 [ 30.271165] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562935b6ec0 [ 30.272024] R13: 00007ffdb6156ad0 R14: 00007ffdb6156b00 R15: 00007ffdb6156e60 [ 30.272891] [ 30.273189] [ 30.273413] Allocated by task 213: [ 30.273857] kasan_save_stack+0x22/0x50 [ 30.274373] kasan_set_track+0x25/0x30 [ 30.274872] __kasan_slab_alloc+0x59/0x70 [ 30.275403] kmem_cache_alloc+0x16b/0x370 [ 30.275923] vm_area_dup+0x20/0x160 [ 30.276376] __split_vma+0x170/0x950 [ 30.276859] split_vma+0xc6/0x110 [ 30.277294] mprotect_fixup+0x8d2/0xb30 [ 30.277805] do_mprotect_pkey+0x87e/0xd40 [ 30.278328] __x64_sys_mprotect+0x78/0xc0 [ 30.278848] do_syscall_64+0x3f/0x90 [ 30.279324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279969] [ 30.280186] Freed by task 213: [ 30.280581] kasan_save_stack+0x22/0x50 [ 30.281083] kasan_set_track+0x25/0x30 [ 30.281582] kasan_save_free_info+0x2b/0x50 [ 30.282137] __kasan_slab_free+0x10a/0x190 [ 30.282672] kmem_cache_free+0x10d/0x4d0 [ 30.283200] rcu_core+0x8c8/0x2860 [ 30.283643] __do_softirq+0x1b7/0x7d4 [ 30.284126] [ 30.284339] Last potentially related work creation: [ 30.284930] kasan_save_stack+0x22/0x50 [ 30.285438] __kasan_record_aux_stack+0x8e/0xa0 [ 30.286023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.286659] remove_vma+0x139/0x170 [ 30.287118] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.287668] do_vmi_munmap+0x1f1/0x2b0 [ 30.288147] __vm_munmap+0x138/0x3a0 [ 30.288616] __x64_sys_munmap+0x59/0x80 [ 30.289117] do_syscall_64+0x3f/0x90 [ 30.289591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290252] [ 30.290470] The buggy address belongs to the object at ffff888019e2fcb0 [ 30.290470] which belongs to the cache vm_area_struct of size 168 [ 30.291924] The buggy address is located 88 bytes inside of [ 30.291924] freed 168-byte region [ffff888019e2fcb0, ffff888019e2fd58) [ 30.293315] [ 30.293532] The buggy address belongs to the physical page: [ 30.294199] page:0000000039244fc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e2f [ 30.295283] memcg:ffff888018781e01 [ 30.295719] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.296362] page_type: 0xffffffff() [ 30.296803] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.297732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018781e01 [ 30.298635] page dumped because: kasan: bad access detected [ 30.299291] [ 30.299508] Memory state around the buggy address: [ 30.300092] ffff888019e2fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.300947] ffff888019e2fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.301804] >ffff888019e2fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.302644] ^ [ 30.303089] ffff888019e2fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.303931] ffff888019e2fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.304767] ================================================================== [ 30.305742] Disabling lock debugging due to kernel taint [ 32.372907] BUG: Bad rss-counter state mm:000000008616ef60 type:MM_FILEPAGES val:33 [ 32.374106] BUG: Bad rss-counter state mm:000000008616ef60 type:MM_ANONPAGES val:22 [ 32.866543] BUG: Bad rss-counter state mm:000000000f6dc189 type:MM_FILEPAGES val:33 [ 32.867948] BUG: Bad rss-counter state mm:000000000f6dc189 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32817' (ECDSA) to the list of known hosts. 2023/06/21 03:56:07 fuzzer started 2023/06/21 03:56:07 dialing manager at localhost:36067 2023/06/21 03:56:07 checking machine... 2023/06/21 03:56:07 checking revisions... [ 33.579781] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:56:08 testing simple program... [ 33.628551] cgroup: Unknown subsys name 'net' [ 33.666620] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdcb4249600 CR3=000000001004c000 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=2037303a36353a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36353a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8460144a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff8460144a RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800fd20000 R15=ffff888019f7d2e0 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 00007fde0ebbb900 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=00007fde0eb9a020 CR3=000000000e974000 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=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