syzkaller login: [ 30.416453] BUG: Bad rss-counter state mm:00000000d9c096a4 type:MM_FILEPAGES val:33 [ 30.417500] BUG: Bad rss-counter state mm:00000000d9c096a4 type:MM_ANONPAGES val:22 [ 30.578527] ================================================================== [ 30.579447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.580416] Read of size 8 at addr ffff88800eff25c8 by task sshd/218 [ 30.581277] [ 30.581505] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.582385] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.583437] Call Trace: [ 30.583762] [ 30.584052] dump_stack_lvl+0x91/0xf0 [ 30.584551] print_report+0xcc/0x620 [ 30.585038] ? __virt_addr_valid+0x102/0x340 [ 30.585600] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586230] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.586847] kasan_report+0xbe/0xf0 [ 30.587336] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.587970] vma_interval_tree_remove+0xc75/0xec0 [ 30.588588] vma_prepare+0xc54/0x11a0 [ 30.589080] __split_vma+0x5af/0x950 [ 30.589562] ? __pfx___split_vma+0x10/0x10 [ 30.590098] ? find_held_lock+0x2c/0x110 [ 30.590623] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.591199] ? lock_is_held_type+0x9f/0x120 [ 30.591779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.592391] ? mtree_range_walk+0x632/0x900 [ 30.592954] ? mas_walk+0x5c7/0x7c0 [ 30.593435] do_vmi_munmap+0x1f1/0x2b0 [ 30.593939] mmap_region+0x1f9/0x2660 [ 30.594430] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.594953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.595687] ? __pfx_lock_acquire+0x10/0x10 [ 30.596229] ? __pfx_mmap_region+0x10/0x10 [ 30.596774] ? security_mmap_addr+0x7d/0xa0 [ 30.597308] ? get_unmapped_area+0x1f5/0x3f0 [ 30.597865] do_mmap+0x854/0xf00 [ 30.598313] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.598823] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.599412] ksys_mmap_pgoff+0x3af/0x500 [ 30.599927] do_syscall_64+0x3f/0x90 [ 30.600410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.601055] RIP: 0033:0x7f32e4905d82 [ 30.601512] 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 [ 30.603652] RSP: 002b:00007ffc3eb88a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.604580] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32e4905d82 [ 30.605436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32e3d3f000 [ 30.606287] RBP: 00007f32e3d3f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.607144] R10: 0000000000000812 R11: 0000000000000206 R12: 000056542d4c3ec0 [ 30.608023] R13: 00007ffc3eb88a20 R14: 00007ffc3eb88a50 R15: 00007ffc3eb88db0 [ 30.608884] [ 30.609179] [ 30.609397] Allocated by task 211: [ 30.609836] kasan_save_stack+0x22/0x50 [ 30.610340] kasan_set_track+0x25/0x30 [ 30.610845] __kasan_slab_alloc+0x59/0x70 [ 30.611395] kmem_cache_alloc+0x16b/0x370 [ 30.611913] vm_area_dup+0x20/0x160 [ 30.612375] __split_vma+0x170/0x950 [ 30.612858] split_vma+0xc6/0x110 [ 30.613301] mprotect_fixup+0x8d2/0xb30 [ 30.613816] do_mprotect_pkey+0x87e/0xd40 [ 30.614340] __x64_sys_mprotect+0x78/0xc0 [ 30.614865] do_syscall_64+0x3f/0x90 [ 30.615348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.615998] [ 30.616217] Freed by task 211: [ 30.616613] kasan_save_stack+0x22/0x50 [ 30.617130] kasan_set_track+0x25/0x30 [ 30.617628] kasan_save_free_info+0x2b/0x50 [ 30.618169] __kasan_slab_free+0x10a/0x190 [ 30.618706] kmem_cache_free+0x10d/0x4d0 [ 30.619214] rcu_core+0x8c8/0x2860 [ 30.619686] __do_softirq+0x1b7/0x7d4 [ 30.620172] [ 30.620391] Last potentially related work creation: [ 30.620974] kasan_save_stack+0x22/0x50 [ 30.621491] __kasan_record_aux_stack+0x8e/0xa0 [ 30.622074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.622713] remove_vma+0x139/0x170 [ 30.623169] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.623752] do_vmi_munmap+0x1f1/0x2b0 [ 30.624243] __vm_munmap+0x138/0x3a0 [ 30.624720] __x64_sys_munmap+0x59/0x80 [ 30.625230] do_syscall_64+0x3f/0x90 [ 30.625711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.626361] [ 30.626580] The buggy address belongs to the object at ffff88800eff2570 [ 30.626580] which belongs to the cache vm_area_struct of size 168 [ 30.628083] The buggy address is located 88 bytes inside of [ 30.628083] freed 168-byte region [ffff88800eff2570, ffff88800eff2618) [ 30.629518] [ 30.629742] The buggy address belongs to the physical page: [ 30.630419] page:00000000fb7cd40c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeff2 [ 30.631530] memcg:ffff88800e60bb01 [ 30.631965] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.632622] page_type: 0xffffffff() [ 30.633078] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.634011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e60bb01 [ 30.634929] page dumped because: kasan: bad access detected [ 30.635601] [ 30.635819] Memory state around the buggy address: [ 30.636408] ffff88800eff2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.637265] ffff88800eff2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.638135] >ffff88800eff2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.639006] ^ [ 30.639695] ffff88800eff2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.640557] ffff88800eff2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.641416] ================================================================== [ 30.642430] Disabling lock debugging due to kernel taint [ 32.624174] BUG: Bad rss-counter state mm:0000000088886474 type:MM_FILEPAGES val:33 [ 32.625371] BUG: Bad rss-counter state mm:0000000088886474 type:MM_ANONPAGES val:22 [ 32.997517] BUG: Bad rss-counter state mm:00000000985b1283 type:MM_FILEPAGES val:33 [ 32.999178] BUG: Bad rss-counter state mm:00000000985b1283 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38257' (ECDSA) to the list of known hosts. 2023/06/20 11:43:20 fuzzer started 2023/06/20 11:43:20 dialing manager at localhost:36067 2023/06/20 11:43:20 checking machine... 2023/06/20 11:43:20 checking revisions... [ 33.738244] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:43:20 testing simple program... [ 33.783520] cgroup: Unknown subsys name 'net' [ 33.834926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9c1355 RSI=ffffffff8180effe RDI=ffff88806ce09b18 RBP=ffff88806ce09ae8 RSP=ffff88806ce09a48 R8 =ffffffff86138e90 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff8880166c0000 R15=ffff888009803380 RIP=ffffffff813ad47e 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 00007f119f045900 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=00007fff9c937000 CR3=000000000f18e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f6672bfb760 CR3=000000000e00c000 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=2039313a33343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a33343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000