syzkaller login: [ 73.053833] BUG: Bad rss-counter state mm:0000000017fa5200 type:MM_FILEPAGES val:33 [ 73.055028] BUG: Bad rss-counter state mm:0000000017fa5200 type:MM_ANONPAGES val:22 [ 73.226899] ================================================================== [ 73.227867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 73.228884] Read of size 8 at addr ffff88800fd8b310 by task sshd/220 [ 73.229840] [ 73.230083] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 73.231041] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 73.232129] Call Trace: [ 73.232479] [ 73.232795] dump_stack_lvl+0x91/0xf0 [ 73.233330] print_report+0xcc/0x620 [ 73.233854] ? __virt_addr_valid+0x102/0x340 [ 73.234450] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.235131] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.235799] kasan_report+0xbe/0xf0 [ 73.236307] ? vma_interval_tree_remove+0xc75/0xec0 [ 73.237017] vma_interval_tree_remove+0xc75/0xec0 [ 73.237692] vma_prepare+0xc54/0x11a0 [ 73.238203] __split_vma+0x5af/0x950 [ 73.238725] ? __pfx___split_vma+0x10/0x10 [ 73.239301] ? find_held_lock+0x2c/0x110 [ 73.239873] do_vmi_align_munmap+0x2ba/0x11f0 [ 73.240489] ? lock_is_held_type+0x9f/0x120 [ 73.241103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 73.241770] ? mtree_range_walk+0x632/0x900 [ 73.242367] ? mas_walk+0x5c7/0x7c0 [ 73.242893] do_vmi_munmap+0x1f1/0x2b0 [ 73.243433] mmap_region+0x1f9/0x2660 [ 73.243965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 73.244516] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 73.245321] ? __pfx_lock_acquire+0x10/0x10 [ 73.245887] ? __pfx_mmap_region+0x10/0x10 [ 73.246426] ? security_mmap_addr+0x7d/0xa0 [ 73.246958] ? get_unmapped_area+0x1f5/0x3f0 [ 73.247511] do_mmap+0x854/0xf00 [ 73.247965] vm_mmap_pgoff+0x1a6/0x3a0 [ 73.248472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 73.249061] ksys_mmap_pgoff+0x3af/0x500 [ 73.249570] do_syscall_64+0x3f/0x90 [ 73.250051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.250696] RIP: 0033:0x7f3ae5633d82 [ 73.251162] 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 [ 73.253305] RSP: 002b:00007ffc089e0058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 73.254202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ae5633d82 [ 73.255060] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ae4a6d000 [ 73.255912] RBP: 00007f3ae4a6d000 R08: 0000000000000009 R09: 0000000000001000 [ 73.256753] R10: 0000000000000812 R11: 0000000000000206 R12: 000055928f752d90 [ 73.257633] R13: 00007ffc089e0070 R14: 00007ffc089e00a0 R15: 00007ffc089e0400 [ 73.258493] [ 73.258796] [ 73.259011] Allocated by task 213: [ 73.259446] kasan_save_stack+0x22/0x50 [ 73.259960] kasan_set_track+0x25/0x30 [ 73.260445] __kasan_slab_alloc+0x59/0x70 [ 73.260977] kmem_cache_alloc+0x16b/0x370 [ 73.261501] vm_area_dup+0x20/0x160 [ 73.261965] __split_vma+0x170/0x950 [ 73.262434] split_vma+0xc6/0x110 [ 73.262873] mprotect_fixup+0x8d2/0xb30 [ 73.263368] do_mprotect_pkey+0x87e/0xd40 [ 73.263894] __x64_sys_mprotect+0x78/0xc0 [ 73.264409] do_syscall_64+0x3f/0x90 [ 73.264886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.265552] [ 73.265769] Freed by task 203: [ 73.266160] kasan_save_stack+0x22/0x50 [ 73.266675] kasan_set_track+0x25/0x30 [ 73.267165] kasan_save_free_info+0x2b/0x50 [ 73.267696] __kasan_slab_free+0x10a/0x190 [ 73.268235] kmem_cache_free+0x10d/0x4d0 [ 73.268739] rcu_core+0x8c8/0x2860 [ 73.269187] __do_softirq+0x1b7/0x7d4 [ 73.269667] [ 73.269894] Last potentially related work creation: [ 73.270490] kasan_save_stack+0x22/0x50 [ 73.270995] __kasan_record_aux_stack+0x8e/0xa0 [ 73.271558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 73.272206] remove_vma+0x139/0x170 [ 73.272660] do_vmi_align_munmap+0xd4a/0x11f0 [ 73.273232] do_vmi_munmap+0x1f1/0x2b0 [ 73.273725] __vm_munmap+0x138/0x3a0 [ 73.274197] __x64_sys_munmap+0x59/0x80 [ 73.274691] do_syscall_64+0x3f/0x90 [ 73.275167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 73.275818] [ 73.276041] The buggy address belongs to the object at ffff88800fd8b2b8 [ 73.276041] which belongs to the cache vm_area_struct of size 168 [ 73.277542] The buggy address is located 88 bytes inside of [ 73.277542] freed 168-byte region [ffff88800fd8b2b8, ffff88800fd8b360) [ 73.278975] [ 73.279189] The buggy address belongs to the physical page: [ 73.279860] page:00000000154123af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd8b [ 73.280956] memcg:ffff88800ed13e01 [ 73.281383] flags: 0x100000000000200(slab|node=0|zone=1) [ 73.282027] page_type: 0xffffffff() [ 73.282483] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 73.283399] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed13e01 [ 73.284324] page dumped because: kasan: bad access detected [ 73.285011] [ 73.285228] Memory state around the buggy address: [ 73.285816] ffff88800fd8b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 73.286672] ffff88800fd8b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 73.287540] >ffff88800fd8b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 73.288398] ^ [ 73.288872] ffff88800fd8b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 73.289736] ffff88800fd8b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 73.290591] ================================================================== [ 73.291575] Disabling lock debugging due to kernel taint [ 75.291657] BUG: Bad rss-counter state mm:000000004a6e0e8d type:MM_FILEPAGES val:33 [ 75.293082] BUG: Bad rss-counter state mm:000000004a6e0e8d type:MM_ANONPAGES val:22 [ 75.707691] BUG: Bad rss-counter state mm:000000006b3a1ca3 type:MM_FILEPAGES val:33 [ 75.708702] BUG: Bad rss-counter state mm:000000006b3a1ca3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25283' (ECDSA) to the list of known hosts. 2023/06/19 19:12:29 fuzzer started 2023/06/19 19:12:29 dialing manager at localhost:44161 2023/06/19 19:12:29 checking machine... 2023/06/19 19:12:29 checking revisions... [ 76.429481] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:12:29 testing simple program... [ 76.476959] cgroup: Unknown subsys name 'net' [ 76.514888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:12:17 Registers: info registers vcpu 0 RAX=ffffffff810bd033 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09a01 RSI=ffff88806ce09a90 RDI=ffff88806ce09a90 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff8609675a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a98 R15=ffff88806ce09a98 RIP=ffffffff81131041 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 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=00007f9e7e92f7d0 CR3=000000000d936000 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=00000000000000000000000000000000 XMM01=104bb756d8d2e29cd4418e66a7657c84 XMM02=ec2efd57dc4c00df000000000011c878 XMM03=84a98ee7b05d6e3f000000000011c948 XMM04=a6b79fa3a60d95cf00000000000ae988 XMM05=82d6970c37e31c750000000000134ba8 XMM06=4fda316b135da52b0000000000133c48 XMM07=e042d86d42eb936e00000000001244f0 XMM08=84a98ee7b05d6e3f000000000011c948 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000005920179 RBX=ffff88800dd74480 RCX=ffff88800dd74000 RDX=0000000000000080 RSI=ffff88800dd74390 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09da0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=ffff88800844f780 R13=ffffea000066d400 R14=ffffffff818d9dc6 R15=ffff888013db9c00 RIP=ffffffff8180ee70 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 00007fc713ca7900 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=00007ffd3166e000 CR3=000000000eec8000 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=6720646572637465733a4d41503d706f 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