syzkaller login: [ 33.184201] BUG: Bad rss-counter state mm:00000000e1d12930 type:MM_FILEPAGES val:33 [ 33.185845] BUG: Bad rss-counter state mm:00000000e1d12930 type:MM_ANONPAGES val:22 [ 33.347613] ================================================================== [ 33.348651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.349754] Read of size 8 at addr ffff88800d9c34e0 by task sshd/220 [ 33.350641] [ 33.351018] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.351951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.352881] Call Trace: [ 33.353203] [ 33.353477] dump_stack_lvl+0x91/0xf0 [ 33.353946] print_report+0xcc/0x620 [ 33.354403] ? __virt_addr_valid+0x102/0x340 [ 33.354926] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.355533] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.356134] kasan_report+0xbe/0xf0 [ 33.356593] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.357202] vma_interval_tree_remove+0xc75/0xec0 [ 33.357778] vma_prepare+0xc54/0x11a0 [ 33.358245] __split_vma+0x5af/0x950 [ 33.358713] ? __pfx___split_vma+0x10/0x10 [ 33.359258] ? find_held_lock+0x2c/0x110 [ 33.359768] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.360319] ? lock_is_held_type+0x9f/0x120 [ 33.360845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.361427] ? mtree_range_walk+0x632/0x900 [ 33.361959] ? mas_walk+0x5c7/0x7c0 [ 33.362412] do_vmi_munmap+0x1f1/0x2b0 [ 33.362890] mmap_region+0x1f9/0x2660 [ 33.363363] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.363859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.364555] ? __pfx_lock_acquire+0x10/0x10 [ 33.365080] ? __pfx_mmap_region+0x10/0x10 [ 33.365595] ? security_mmap_addr+0x7d/0xa0 [ 33.366106] ? get_unmapped_area+0x1f5/0x3f0 [ 33.366639] do_mmap+0x854/0xf00 [ 33.367115] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.367595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.368137] ksys_mmap_pgoff+0x3af/0x500 [ 33.368633] do_syscall_64+0x3f/0x90 [ 33.369102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.369733] RIP: 0033:0x7f7328ffad82 [ 33.370170] 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 [ 33.372208] RSP: 002b:00007fff2514b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.373093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7328ffad82 [ 33.373916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7328434000 [ 33.374728] RBP: 00007f7328434000 R08: 0000000000000009 R09: 0000000000001000 [ 33.375538] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baa1f63ec0 [ 33.376352] R13: 00007fff2514b860 R14: 00007fff2514b890 R15: 00007fff2514bbf0 [ 33.377193] [ 33.377471] [ 33.377673] Allocated by task 213: [ 33.378086] kasan_save_stack+0x22/0x50 [ 33.378573] kasan_set_track+0x25/0x30 [ 33.379088] __kasan_slab_alloc+0x59/0x70 [ 33.379592] kmem_cache_alloc+0x16b/0x370 [ 33.380096] vm_area_dup+0x20/0x160 [ 33.380529] __split_vma+0x170/0x950 [ 33.380979] split_vma+0xc6/0x110 [ 33.381400] mprotect_fixup+0x8d2/0xb30 [ 33.381884] do_mprotect_pkey+0x87e/0xd40 [ 33.382388] __x64_sys_mprotect+0x78/0xc0 [ 33.382891] do_syscall_64+0x3f/0x90 [ 33.383366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.383984] [ 33.384187] Freed by task 19: [ 33.384549] kasan_save_stack+0x22/0x50 [ 33.385029] kasan_set_track+0x25/0x30 [ 33.385512] kasan_save_free_info+0x2b/0x50 [ 33.386034] __kasan_slab_free+0x10a/0x190 [ 33.386541] kmem_cache_free+0x10d/0x4d0 [ 33.387066] rcu_core+0x8c8/0x2860 [ 33.387497] __do_softirq+0x1b7/0x7d4 [ 33.387964] [ 33.388172] Last potentially related work creation: [ 33.388734] kasan_save_stack+0x22/0x50 [ 33.389273] __kasan_record_aux_stack+0x8e/0xa0 [ 33.389861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.390498] remove_vma+0x139/0x170 [ 33.390952] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.391551] do_vmi_munmap+0x1f1/0x2b0 [ 33.392037] __vm_munmap+0x138/0x3a0 [ 33.392500] __x64_sys_munmap+0x59/0x80 [ 33.393001] do_syscall_64+0x3f/0x90 [ 33.393480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.394121] [ 33.394332] The buggy address belongs to the object at ffff88800d9c3488 [ 33.394332] which belongs to the cache vm_area_struct of size 168 [ 33.395840] The buggy address is located 88 bytes inside of [ 33.395840] freed 168-byte region [ffff88800d9c3488, ffff88800d9c3530) [ 33.397248] [ 33.397471] The buggy address belongs to the physical page: [ 33.398143] page:0000000093d091a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9c3 [ 33.399252] memcg:ffff88800c546801 [ 33.399673] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.400331] page_type: 0xffffffff() [ 33.400796] raw: 0100000000000200 ffff88800879fc80 ffffea0000366b80 dead000000000004 [ 33.401713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c546801 [ 33.402618] page dumped because: kasan: bad access detected [ 33.403298] [ 33.403513] Memory state around the buggy address: [ 33.404101] ffff88800d9c3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.404959] ffff88800d9c3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.405810] >ffff88800d9c3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.406658] ^ [ 33.407449] ffff88800d9c3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.408315] ffff88800d9c3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.409188] ================================================================== [ 33.410186] Disabling lock debugging due to kernel taint [ 36.202892] BUG: Bad rss-counter state mm:000000007e4759b5 type:MM_FILEPAGES val:33 [ 36.204316] BUG: Bad rss-counter state mm:000000007e4759b5 type:MM_ANONPAGES val:22 [ 36.708467] BUG: Bad rss-counter state mm:000000004f2902f9 type:MM_FILEPAGES val:33 [ 36.709450] BUG: Bad rss-counter state mm:000000004f2902f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60723' (ECDSA) to the list of known hosts. 2023/06/20 02:49:51 fuzzer started 2023/06/20 02:49:52 dialing manager at localhost:44161 2023/06/20 02:49:52 checking machine... 2023/06/20 02:49:52 checking revisions... [ 37.422261] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:49:52 testing simple program... [ 37.466692] cgroup: Unknown subsys name 'net' [ 37.502509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:49 Registers: info registers vcpu 0 RAX=1ffffffff0bc128e RBX=ffffffff85e09470 RCX=ffffffff818c7603 RDX=0000000000000000 RSI=ffffffff8614a4a4 RDI=ffffffff85e09464 RBP=ffffffff85e09464 RSP=ffff88801464f3a8 R8 =ffffffff8614a4a4 R9 =ffff88801464f4a0 R10=0000000000038001 R11=0000000000024024 R12=ffffffff85e09480 R13=ffffffff85e09464 R14=ffffffff85e09464 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f998d34c900 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=00007f998c7818e0 CR3=0000000009fda000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8bd9eabd31e4aa0b00000000000ae988 XMM05=a1d5b2bb1d2aaf360000000000134f30 XMM06=4fda316b135da52b0000000000133fd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c585 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880158c7901 RSI=ffff8880158c79a0 RDI=ffff8880158c79a0 RBP=ffff8880158c76b0 RSP=ffff8880158c75e0 R8 =ffffffff8613751e R9 =ffff8880158c7698 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880158c76b8 R13=ffff8880158c76a0 R14=ffff8880158c79a8 R15=ffff8880158c7658 RIP=ffffffff8112fbf3 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 00007f099f080900 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=00007ffdf2b56000 CR3=0000000019f7e000 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