syzkaller login: [ 35.223959] BUG: Bad rss-counter state mm:00000000d209b577 type:MM_FILEPAGES val:33 [ 35.224960] BUG: Bad rss-counter state mm:00000000d209b577 type:MM_ANONPAGES val:22 [ 35.385486] ================================================================== [ 35.386557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.387691] Read of size 8 at addr ffff88800dd34d08 by task sshd/220 [ 35.388449] [ 35.388671] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.389532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.390522] Call Trace: [ 35.390848] [ 35.391129] dump_stack_lvl+0x91/0xf0 [ 35.391631] print_report+0xcc/0x620 [ 35.392117] ? __virt_addr_valid+0x102/0x340 [ 35.392667] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.393278] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.393894] kasan_report+0xbe/0xf0 [ 35.394379] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.395006] vma_interval_tree_remove+0xc75/0xec0 [ 35.395640] vma_prepare+0xc54/0x11a0 [ 35.396127] __split_vma+0x5af/0x950 [ 35.396601] ? __pfx___split_vma+0x10/0x10 [ 35.397131] ? find_held_lock+0x2c/0x110 [ 35.397655] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.398224] ? lock_is_held_type+0x9f/0x120 [ 35.398767] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.399393] ? mtree_range_walk+0x632/0x900 [ 35.399959] ? mas_walk+0x5c7/0x7c0 [ 35.400434] do_vmi_munmap+0x1f1/0x2b0 [ 35.400930] mmap_region+0x1f9/0x2660 [ 35.401411] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.401937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.402653] ? __pfx_lock_acquire+0x10/0x10 [ 35.403187] ? __pfx_mmap_region+0x10/0x10 [ 35.403735] ? security_mmap_addr+0x7d/0xa0 [ 35.404271] ? get_unmapped_area+0x1f5/0x3f0 [ 35.404825] do_mmap+0x854/0xf00 [ 35.405267] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.405759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.406332] ksys_mmap_pgoff+0x3af/0x500 [ 35.406840] do_syscall_64+0x3f/0x90 [ 35.407321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.407974] RIP: 0033:0x7f75f98c3d82 [ 35.408436] 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 [ 35.410600] RSP: 002b:00007fff03a09678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.411527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75f98c3d82 [ 35.412396] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75f8cfd000 [ 35.413250] RBP: 00007f75f8cfd000 R08: 0000000000000009 R09: 0000000000001000 [ 35.414108] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614045eaf70 [ 35.414955] R13: 00007fff03a09690 R14: 00007fff03a096c0 R15: 00007fff03a09a20 [ 35.415854] [ 35.416148] [ 35.416361] Allocated by task 213: [ 35.416787] kasan_save_stack+0x22/0x50 [ 35.417297] kasan_set_track+0x25/0x30 [ 35.417788] __kasan_slab_alloc+0x59/0x70 [ 35.418319] kmem_cache_alloc+0x16b/0x370 [ 35.418843] vm_area_dup+0x20/0x160 [ 35.419292] __split_vma+0x170/0x950 [ 35.419770] split_vma+0xc6/0x110 [ 35.420217] mprotect_fixup+0x8d2/0xb30 [ 35.420716] do_mprotect_pkey+0x87e/0xd40 [ 35.421243] __x64_sys_mprotect+0x78/0xc0 [ 35.421763] do_syscall_64+0x3f/0x90 [ 35.422242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.422890] [ 35.423108] Freed by task 19: [ 35.423509] kasan_save_stack+0x22/0x50 [ 35.424011] kasan_set_track+0x25/0x30 [ 35.424510] kasan_save_free_info+0x2b/0x50 [ 35.425038] __kasan_slab_free+0x10a/0x190 [ 35.425585] kmem_cache_free+0x10d/0x4d0 [ 35.426114] rcu_core+0x8c8/0x2860 [ 35.426558] __do_softirq+0x1b7/0x7d4 [ 35.427046] [ 35.427272] Last potentially related work creation: [ 35.427872] kasan_save_stack+0x22/0x50 [ 35.428380] __kasan_record_aux_stack+0x8e/0xa0 [ 35.428976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.429632] remove_vma+0x139/0x170 [ 35.430095] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.430658] do_vmi_munmap+0x1f1/0x2b0 [ 35.431156] __vm_munmap+0x138/0x3a0 [ 35.431651] __x64_sys_munmap+0x59/0x80 [ 35.432155] do_syscall_64+0x3f/0x90 [ 35.432634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.433286] [ 35.433506] The buggy address belongs to the object at ffff88800dd34cb0 [ 35.433506] which belongs to the cache vm_area_struct of size 168 [ 35.435008] The buggy address is located 88 bytes inside of [ 35.435008] freed 168-byte region [ffff88800dd34cb0, ffff88800dd34d58) [ 35.436416] [ 35.436629] The buggy address belongs to the physical page: [ 35.437280] page:00000000a11d5308 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd34 [ 35.438353] memcg:ffff88800efe1e01 [ 35.438783] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.439482] page_type: 0xffffffff() [ 35.439929] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5f00 dead000000000007 [ 35.440839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efe1e01 [ 35.441748] page dumped because: kasan: bad access detected [ 35.442403] [ 35.442617] Memory state around the buggy address: [ 35.443196] ffff88800dd34c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.444063] ffff88800dd34c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.444921] >ffff88800dd34d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.445778] ^ [ 35.446211] ffff88800dd34d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.447066] ffff88800dd34e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.447928] ================================================================== [ 35.448926] Disabling lock debugging due to kernel taint [ 37.366658] BUG: Bad rss-counter state mm:000000001378136e type:MM_FILEPAGES val:33 [ 37.367695] BUG: Bad rss-counter state mm:000000001378136e type:MM_ANONPAGES val:22 [ 37.764770] BUG: Bad rss-counter state mm:000000001b3253bd type:MM_FILEPAGES val:33 [ 37.766203] BUG: Bad rss-counter state mm:000000001b3253bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18052' (ECDSA) to the list of known hosts. 2023/06/20 15:57:33 fuzzer started 2023/06/20 15:57:34 dialing manager at localhost:36067 2023/06/20 15:57:34 checking machine... 2023/06/20 15:57:34 checking revisions... [ 38.460094] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:57:34 testing simple program... [ 38.513351] cgroup: Unknown subsys name 'net' [ 38.547331] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800eb1a000 RCX=0000000000000000 RDX=ffff888015bb51c0 RSI=ffffffff8187bafb RDI=ffff88800eb1a180 RBP=ffff88800eb1a000 RSP=ffff888014657d98 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800eb1a000 R11=0000000000000000 R12=00007fff1cd83570 R13=ffff88800eb1a180 R14=ffff88800eb1a180 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 00007f9a58cff900 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=00007fff1cd7d000 CR3=000000000d8e6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=ffff888008c04400 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=00007f0867c7aff0 CR3=000000000d606000 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=4200d2c26fe82aa0c74acc5e4ecb0e83 XMM02=ec2efd57dc4c00df000000000011b3c0 XMM03=5931f83569fa79e9000000000011b490 XMM04=8fe6e61a36fb4de200000000000ae988 XMM05=19e9129bd510f2350000000000131988 XMM06=a64c131b5bc32c1b0000000000130b60 XMM07=e042d86d42eb936e00000000001220c8 XMM08=5931f83569fa79e9000000000011b490 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000