syzkaller login: [ 35.575782] BUG: Bad rss-counter state mm:000000000a3e8a05 type:MM_FILEPAGES val:33 [ 35.577337] BUG: Bad rss-counter state mm:000000000a3e8a05 type:MM_ANONPAGES val:22 [ 35.744488] ================================================================== [ 35.745766] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.746925] Read of size 8 at addr ffff88800f166058 by task sshd/220 [ 35.747710] [ 35.747929] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.748839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.749844] Call Trace: [ 35.750170] [ 35.750499] dump_stack_lvl+0x91/0xf0 [ 35.751006] print_report+0xcc/0x620 [ 35.751513] ? __virt_addr_valid+0x102/0x340 [ 35.752080] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.752715] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.753350] kasan_report+0xbe/0xf0 [ 35.753833] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.754487] vma_interval_tree_remove+0xc75/0xec0 [ 35.755097] vma_prepare+0xc54/0x11a0 [ 35.755607] __split_vma+0x5af/0x950 [ 35.756086] ? __pfx___split_vma+0x10/0x10 [ 35.756633] ? find_held_lock+0x2c/0x110 [ 35.757167] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.757755] ? lock_is_held_type+0x9f/0x120 [ 35.758303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.758962] ? mtree_range_walk+0x632/0x900 [ 35.759557] ? mas_walk+0x5c7/0x7c0 [ 35.760050] do_vmi_munmap+0x1f1/0x2b0 [ 35.760556] mmap_region+0x1f9/0x2660 [ 35.761044] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.761579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.762308] ? __pfx_lock_acquire+0x10/0x10 [ 35.762873] ? __pfx_mmap_region+0x10/0x10 [ 35.763438] ? security_mmap_addr+0x7d/0xa0 [ 35.763983] ? get_unmapped_area+0x1f5/0x3f0 [ 35.764554] do_mmap+0x854/0xf00 [ 35.765003] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.765522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.766090] ksys_mmap_pgoff+0x3af/0x500 [ 35.766616] do_syscall_64+0x3f/0x90 [ 35.767120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.767806] RIP: 0033:0x7f7afced8d82 [ 35.768273] 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 [ 35.770484] RSP: 002b:00007ffd41dcdf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.771424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7afced8d82 [ 35.772286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7afc312000 [ 35.773158] RBP: 00007f7afc312000 R08: 0000000000000009 R09: 0000000000001000 [ 35.774030] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560eb38e0ec0 [ 35.774907] R13: 00007ffd41dcdfa0 R14: 00007ffd41dcdfd0 R15: 00007ffd41dce330 [ 35.775801] [ 35.776102] [ 35.776325] Allocated by task 213: [ 35.776764] kasan_save_stack+0x22/0x50 [ 35.777273] kasan_set_track+0x25/0x30 [ 35.777788] __kasan_slab_alloc+0x59/0x70 [ 35.778323] kmem_cache_alloc+0x16b/0x370 [ 35.778859] vm_area_dup+0x20/0x160 [ 35.779326] __split_vma+0x170/0x950 [ 35.779823] split_vma+0xc6/0x110 [ 35.780263] mprotect_fixup+0x8d2/0xb30 [ 35.780779] do_mprotect_pkey+0x87e/0xd40 [ 35.781305] __x64_sys_mprotect+0x78/0xc0 [ 35.781841] do_syscall_64+0x3f/0x90 [ 35.782332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.783008] [ 35.783226] Freed by task 213: [ 35.783654] kasan_save_stack+0x22/0x50 [ 35.784159] kasan_set_track+0x25/0x30 [ 35.784667] kasan_save_free_info+0x2b/0x50 [ 35.785205] __kasan_slab_free+0x10a/0x190 [ 35.785764] kmem_cache_free+0x10d/0x4d0 [ 35.786282] rcu_core+0x8c8/0x2860 [ 35.786843] __do_softirq+0x1b7/0x7d4 [ 35.787336] [ 35.787572] Last potentially related work creation: [ 35.788167] kasan_save_stack+0x22/0x50 [ 35.788691] __kasan_record_aux_stack+0x8e/0xa0 [ 35.789275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.789942] remove_vma+0x139/0x170 [ 35.790442] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.791004] do_vmi_munmap+0x1f1/0x2b0 [ 35.791517] __vm_munmap+0x138/0x3a0 [ 35.791991] __x64_sys_munmap+0x59/0x80 [ 35.792507] do_syscall_64+0x3f/0x90 [ 35.792986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.793643] [ 35.793860] The buggy address belongs to the object at ffff88800f166000 [ 35.793860] which belongs to the cache vm_area_struct of size 168 [ 35.795373] The buggy address is located 88 bytes inside of [ 35.795373] freed 168-byte region [ffff88800f166000, ffff88800f1660a8) [ 35.796810] [ 35.797027] The buggy address belongs to the physical page: [ 35.797702] page:0000000091e5f54c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf166 [ 35.799090] memcg:ffff888019ef0f01 [ 35.799567] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.800219] page_type: 0xffffffff() [ 35.800684] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7340 dead000000000008 [ 35.801628] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ef0f01 [ 35.802580] page dumped because: kasan: bad access detected [ 35.803241] [ 35.803490] Memory state around the buggy address: [ 35.804070] ffff88800f165f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.804959] ffff88800f165f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.805886] >ffff88800f166000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.806770] ^ [ 35.807521] ffff88800f166080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.808406] ffff88800f166100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.809270] ================================================================== [ 35.810306] Disabling lock debugging due to kernel taint [ 38.172229] BUG: Bad rss-counter state mm:0000000018bb5625 type:MM_FILEPAGES val:33 [ 38.173327] BUG: Bad rss-counter state mm:0000000018bb5625 type:MM_ANONPAGES val:22 [ 38.651825] BUG: Bad rss-counter state mm:000000006de178a0 type:MM_FILEPAGES val:33 [ 38.653298] BUG: Bad rss-counter state mm:000000006de178a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63312' (ECDSA) to the list of known hosts. 2023/06/21 01:32:27 fuzzer started 2023/06/21 01:32:28 dialing manager at localhost:36067 2023/06/21 01:32:28 checking machine... 2023/06/21 01:32:28 checking revisions... [ 39.417409] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:32:28 testing simple program... [ 39.477444] cgroup: Unknown subsys name 'net' [ 39.532414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:32:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007eff98caa000 CR3=000000000d96e000 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=a82672cd43d786a2b646d768e822da59 XMM02=000000000011b0f0ec2efd57dc4c00df XMM03=0000000000121a908ba03876ced6ad33 XMM04=72a84e2b1ddc347900000000000ae988 XMM05=19e9129bd510f2350000000000131608 XMM06=4fda316b135da52b0000000000131490 XMM07=e042d86d42eb936e0000000000121d68 XMM08=8ba03876ced6ad33000000000011b150 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888018043680 RSI=ffffffff83650f12 RDI=0000000000000005 RBP=ffff888016704274 RSP=ffff888016af7d48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888016704000 R13=ffffffff87f9778c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff8135bd44 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 00007f491cf2c900 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=00007fff48fc8000 CR3=000000000da1e000 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=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