syzkaller login: [ 31.049234] BUG: Bad rss-counter state mm:0000000025b5b80a type:MM_FILEPAGES val:33 [ 31.050583] BUG: Bad rss-counter state mm:0000000025b5b80a type:MM_ANONPAGES val:22 [ 31.234582] ================================================================== [ 31.235514] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.236505] Read of size 8 at addr ffff88801693a5c8 by task sshd/219 [ 31.237453] [ 31.237677] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.238566] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.239595] Call Trace: [ 31.239969] [ 31.240257] dump_stack_lvl+0x91/0xf0 [ 31.240759] print_report+0xcc/0x620 [ 31.241254] ? __virt_addr_valid+0x102/0x340 [ 31.241819] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243106] kasan_report+0xbe/0xf0 [ 31.243582] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244255] vma_interval_tree_remove+0xc75/0xec0 [ 31.244873] vma_prepare+0xc54/0x11a0 [ 31.245369] __split_vma+0x5af/0x950 [ 31.245866] ? __pfx___split_vma+0x10/0x10 [ 31.246422] ? find_held_lock+0x2c/0x110 [ 31.246988] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247573] ? lock_is_held_type+0x9f/0x120 [ 31.248153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.248759] ? mtree_range_walk+0x632/0x900 [ 31.249335] ? mas_walk+0x5c7/0x7c0 [ 31.249824] do_vmi_munmap+0x1f1/0x2b0 [ 31.250330] mmap_region+0x1f9/0x2660 [ 31.250826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.251367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.252123] ? __pfx_lock_acquire+0x10/0x10 [ 31.252657] ? __pfx_mmap_region+0x10/0x10 [ 31.253203] ? security_mmap_addr+0x7d/0xa0 [ 31.253741] ? get_unmapped_area+0x1f5/0x3f0 [ 31.254318] do_mmap+0x854/0xf00 [ 31.254766] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.255878] ksys_mmap_pgoff+0x3af/0x500 [ 31.256411] do_syscall_64+0x3f/0x90 [ 31.256913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257563] RIP: 0033:0x7f539a335d82 [ 31.258036] 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 [ 31.260220] RSP: 002b:00007ffc1d48ace8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.261169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f539a335d82 [ 31.262033] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f539976f000 [ 31.262897] RBP: 00007f539976f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263749] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d4f58cb20 [ 31.264628] R13: 00007ffc1d48ad00 R14: 00007ffc1d48ad30 R15: 00007ffc1d48b090 [ 31.265537] [ 31.265838] [ 31.266081] Allocated by task 212: [ 31.266515] kasan_save_stack+0x22/0x50 [ 31.267044] kasan_set_track+0x25/0x30 [ 31.267533] __kasan_slab_alloc+0x59/0x70 [ 31.268108] kmem_cache_alloc+0x16b/0x370 [ 31.268625] vm_area_dup+0x20/0x160 [ 31.269107] __split_vma+0x170/0x950 [ 31.269572] split_vma+0xc6/0x110 [ 31.270042] mprotect_fixup+0x8d2/0xb30 [ 31.270561] do_mprotect_pkey+0x87e/0xd40 [ 31.271105] __x64_sys_mprotect+0x78/0xc0 [ 31.271626] do_syscall_64+0x3f/0x90 [ 31.272134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272783] [ 31.273012] Freed by task 209: [ 31.273408] kasan_save_stack+0x22/0x50 [ 31.273929] kasan_set_track+0x25/0x30 [ 31.274437] kasan_save_free_info+0x2b/0x50 [ 31.274992] __kasan_slab_free+0x10a/0x190 [ 31.275521] kmem_cache_free+0x10d/0x4d0 [ 31.276086] rcu_core+0x8c8/0x2860 [ 31.276532] __do_softirq+0x1b7/0x7d4 [ 31.277031] [ 31.277250] Last potentially related work creation: [ 31.277834] kasan_save_stack+0x22/0x50 [ 31.278419] __kasan_record_aux_stack+0x8e/0xa0 [ 31.279019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.279661] remove_vma+0x139/0x170 [ 31.280136] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.280689] do_vmi_munmap+0x1f1/0x2b0 [ 31.281203] __vm_munmap+0x138/0x3a0 [ 31.281675] __x64_sys_munmap+0x59/0x80 [ 31.282188] do_syscall_64+0x3f/0x90 [ 31.282664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283341] [ 31.283555] The buggy address belongs to the object at ffff88801693a570 [ 31.283555] which belongs to the cache vm_area_struct of size 168 [ 31.285072] The buggy address is located 88 bytes inside of [ 31.285072] freed 168-byte region [ffff88801693a570, ffff88801693a618) [ 31.286486] [ 31.286707] The buggy address belongs to the physical page: [ 31.287401] page:00000000202d4343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1693a [ 31.288539] memcg:ffff88800e668001 [ 31.288983] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.289679] page_type: 0xffffffff() [ 31.290152] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.291103] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e668001 [ 31.292064] page dumped because: kasan: bad access detected [ 31.292737] [ 31.292967] Memory state around the buggy address: [ 31.293549] ffff88801693a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.294428] ffff88801693a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.295311] >ffff88801693a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.296205] ^ [ 31.296889] ffff88801693a600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.297747] ffff88801693a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.298608] ================================================================== [ 31.299609] Disabling lock debugging due to kernel taint [ 33.572787] BUG: Bad rss-counter state mm:00000000026e00b3 type:MM_FILEPAGES val:33 [ 33.573959] BUG: Bad rss-counter state mm:00000000026e00b3 type:MM_ANONPAGES val:22 [ 34.110696] BUG: Bad rss-counter state mm:00000000d82756e9 type:MM_FILEPAGES val:33 [ 34.112136] BUG: Bad rss-counter state mm:00000000d82756e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24008' (ECDSA) to the list of known hosts. 2023/06/20 11:16:25 fuzzer started 2023/06/20 11:16:25 dialing manager at localhost:36067 2023/06/20 11:16:25 checking machine... 2023/06/20 11:16:25 checking revisions... [ 34.715351] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:16:25 testing simple program... [ 34.766936] cgroup: Unknown subsys name 'net' [ 34.807100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:16:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=00007f97c4000800 RDX=00000000ffffffff RSI=0000000000000001 RDI=00007f97c4000b80 RBP=0000000000000058 RSP=00007f97c9958d18 R8 =00007f97c9959700 R9 =00005623eb740e88 R10=0000000000000000 R11=0000000000000246 R12=0000000000000000 R13=00007f97c4000b80 R14=00005623e9f85a50 R15=00007f97c9a2c840 RIP=00007f97c9ddd3b0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f97c9959700 00000000 00000000 GS =0000 0000000000000000 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=00007f3f5226f0b0 CR3=0000000014622000 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=36313a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f168b052680 CR3=000000000c578000 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=0efacedc83aa96ba7448685f5fc8ad62 XMM02=2c67c8bc2e329bc3000000000011db20 XMM03=fb795ef6d657705600000000001221b0 XMM04=7140e890b7e67d0700000000000ae988 XMM05=dfcdbad4f1609c370000000000132028 XMM06=1e0f8472e0607ba60000000000130e90 XMM07=e042d86d42eb936e0000000000122430 XMM08=5249afe7eea810f9000000000011db80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000