syzkaller login: [ 31.397475] BUG: Bad rss-counter state mm:00000000dcad2a1d type:MM_FILEPAGES val:33 [ 31.398710] BUG: Bad rss-counter state mm:00000000dcad2a1d type:MM_ANONPAGES val:22 [ 31.438191] ================================================================== [ 31.439091] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.440144] Read of size 8 at addr ffff88801634b058 by task sshd/220 [ 31.440943] [ 31.441167] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.442072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.443086] Call Trace: [ 31.443411] [ 31.443695] dump_stack_lvl+0x91/0xf0 [ 31.444192] print_report+0xcc/0x620 [ 31.444691] ? __virt_addr_valid+0x102/0x340 [ 31.445254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.445884] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.446507] kasan_report+0xbe/0xf0 [ 31.446997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.447617] vma_interval_tree_remove+0xc75/0xec0 [ 31.448226] vma_prepare+0xc54/0x11a0 [ 31.448708] __split_vma+0x5af/0x950 [ 31.449208] ? __pfx___split_vma+0x10/0x10 [ 31.449746] ? find_held_lock+0x2c/0x110 [ 31.450275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.450848] ? lock_is_held_type+0x9f/0x120 [ 31.451389] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.452005] ? mtree_range_walk+0x632/0x900 [ 31.452562] ? mas_walk+0x5c7/0x7c0 [ 31.453046] do_vmi_munmap+0x1f1/0x2b0 [ 31.453565] mmap_region+0x1f9/0x2660 [ 31.454054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.454564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.455280] ? __pfx_lock_acquire+0x10/0x10 [ 31.455817] ? __pfx_mmap_region+0x10/0x10 [ 31.456351] ? security_mmap_addr+0x7d/0xa0 [ 31.456880] ? get_unmapped_area+0x1f5/0x3f0 [ 31.457450] do_mmap+0x854/0xf00 [ 31.457893] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.458394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.458954] ksys_mmap_pgoff+0x3af/0x500 [ 31.459465] do_syscall_64+0x3f/0x90 [ 31.459947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.460596] RIP: 0033:0x7f561d62dd82 [ 31.461078] 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 [ 31.463203] RSP: 002b:00007ffd68c791f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.464106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f561d62dd82 [ 31.464946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f561ca67000 [ 31.465815] RBP: 00007f561ca67000 R08: 0000000000000009 R09: 0000000000001000 [ 31.466667] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f066674b20 [ 31.467507] R13: 00007ffd68c79210 R14: 00007ffd68c79240 R15: 00007ffd68c795a0 [ 31.468375] [ 31.468667] [ 31.468887] Allocated by task 213: [ 31.469331] kasan_save_stack+0x22/0x50 [ 31.469832] kasan_set_track+0x25/0x30 [ 31.470333] __kasan_slab_alloc+0x59/0x70 [ 31.470862] kmem_cache_alloc+0x16b/0x370 [ 31.471381] vm_area_dup+0x20/0x160 [ 31.471851] __split_vma+0x170/0x950 [ 31.472329] split_vma+0xc6/0x110 [ 31.472786] mprotect_fixup+0x8d2/0xb30 [ 31.473326] do_mprotect_pkey+0x87e/0xd40 [ 31.473864] __x64_sys_mprotect+0x78/0xc0 [ 31.474410] do_syscall_64+0x3f/0x90 [ 31.474907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.475571] [ 31.475797] Freed by task 13: [ 31.476197] kasan_save_stack+0x22/0x50 [ 31.476721] kasan_set_track+0x25/0x30 [ 31.477237] kasan_save_free_info+0x2b/0x50 [ 31.477789] __kasan_slab_free+0x10a/0x190 [ 31.478342] kmem_cache_free+0x10d/0x4d0 [ 31.478876] rcu_core+0x8c8/0x2860 [ 31.479342] __do_softirq+0x1b7/0x7d4 [ 31.479846] [ 31.480071] Last potentially related work creation: [ 31.480682] kasan_save_stack+0x22/0x50 [ 31.481226] __kasan_record_aux_stack+0x8e/0xa0 [ 31.481826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.482506] remove_vma+0x139/0x170 [ 31.482972] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.483549] do_vmi_munmap+0x1f1/0x2b0 [ 31.484059] __vm_munmap+0x138/0x3a0 [ 31.484556] __x64_sys_munmap+0x59/0x80 [ 31.485075] do_syscall_64+0x3f/0x90 [ 31.485587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.486265] [ 31.486487] The buggy address belongs to the object at ffff88801634b000 [ 31.486487] which belongs to the cache vm_area_struct of size 168 [ 31.488044] The buggy address is located 88 bytes inside of [ 31.488044] freed 168-byte region [ffff88801634b000, ffff88801634b0a8) [ 31.489534] [ 31.489759] The buggy address belongs to the physical page: [ 31.490453] page:00000000d8458e7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1634b [ 31.491598] memcg:ffff888018efa101 [ 31.492045] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.492721] page_type: 0xffffffff() [ 31.493217] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.494187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018efa101 [ 31.495152] page dumped because: kasan: bad access detected [ 31.495845] [ 31.496070] Memory state around the buggy address: [ 31.496690] ffff88801634af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.497597] ffff88801634af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.498501] >ffff88801634b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.499401] ^ [ 31.500176] ffff88801634b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.501081] ffff88801634b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.501970] ================================================================== [ 31.503141] Disabling lock debugging due to kernel taint [ 33.739126] BUG: Bad rss-counter state mm:000000008c9df990 type:MM_FILEPAGES val:33 [ 33.740330] BUG: Bad rss-counter state mm:000000008c9df990 type:MM_ANONPAGES val:22 [ 34.250729] BUG: Bad rss-counter state mm:00000000a81579a8 type:MM_FILEPAGES val:33 [ 34.251907] BUG: Bad rss-counter state mm:00000000a81579a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7417' (ECDSA) to the list of known hosts. 2023/06/20 17:14:28 fuzzer started 2023/06/20 17:14:28 dialing manager at localhost:36067 2023/06/20 17:14:28 checking machine... 2023/06/20 17:14:28 checking revisions... [ 34.906154] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:14:28 testing simple program... [ 34.955395] cgroup: Unknown subsys name 'net' [ 34.998449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:14:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018ecfc01 RSI=ffff888018ecfbf8 RDI=ffff888018ecfbf8 RBP=ffff888018ecf580 RSP=ffff888018ecf4b8 R8 =0000000000000001 R9 =ffff888018ecf568 R10=0000000000038001 R11=000000000002bf96 R12=ffff888018ecf588 R13=ffff888018ecf570 R14=ffff888018ecfbf8 R15=ffff888018ecf528 RIP=ffffffff81131236 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 00007fe003677700 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=00007f31c75720b0 CR3=000000000da46000 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=2037323a34313a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a34313a3731203032 XMM08=69767265733d7373616c63742030733a 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=00007fef6c9789b0 CR3=000000000eb72000 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=5c1d23f74b11eca6c54d7b34760bfab9 XMM02=ec2efd57dc4c00df00000000001198d8 XMM03=962500a40ab2906800000000001199a8 XMM04=4be25cb67335745000000000000ae988 XMM05=19e9129bd510f2350000000000130f18 XMM06=9288504f7445b6cd000000000012f618 XMM07=e042d86d42eb936e0000000000121320 XMM08=962500a40ab2906800000000001199a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000