syzkaller login: [ 31.592413] BUG: Bad rss-counter state mm:00000000bf7382d9 type:MM_FILEPAGES val:33 [ 31.593601] BUG: Bad rss-counter state mm:00000000bf7382d9 type:MM_ANONPAGES val:22 [ 31.756281] ================================================================== [ 31.757181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.758113] Read of size 8 at addr ffff888016763ed8 by task sshd/222 [ 31.758875] [ 31.759094] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.760065] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.761022] Call Trace: [ 31.761341] [ 31.761624] dump_stack_lvl+0x91/0xf0 [ 31.762122] print_report+0xcc/0x620 [ 31.762601] ? __virt_addr_valid+0x102/0x340 [ 31.763142] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.763753] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.764388] kasan_report+0xbe/0xf0 [ 31.764857] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.765480] vma_interval_tree_remove+0xc75/0xec0 [ 31.766088] vma_prepare+0xc54/0x11a0 [ 31.766573] __split_vma+0x5af/0x950 [ 31.767049] ? __pfx___split_vma+0x10/0x10 [ 31.767580] ? find_held_lock+0x2c/0x110 [ 31.768117] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.768684] ? lock_is_held_type+0x9f/0x120 [ 31.769219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.769827] ? mtree_range_walk+0x632/0x900 [ 31.770395] ? mas_walk+0x5c7/0x7c0 [ 31.770872] do_vmi_munmap+0x1f1/0x2b0 [ 31.771367] mmap_region+0x1f9/0x2660 [ 31.771845] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.772368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.773088] ? __pfx_lock_acquire+0x10/0x10 [ 31.773630] ? __pfx_mmap_region+0x10/0x10 [ 31.774165] ? security_mmap_addr+0x7d/0xa0 [ 31.774692] ? get_unmapped_area+0x1f5/0x3f0 [ 31.775243] do_mmap+0x854/0xf00 [ 31.775683] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.776199] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.776766] ksys_mmap_pgoff+0x3af/0x500 [ 31.777276] do_syscall_64+0x3f/0x90 [ 31.777763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778404] RIP: 0033:0x7f056ae6fd82 [ 31.778871] 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 [ 31.781025] RSP: 002b:00007ffd010519f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.781946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f056ae6fd82 [ 31.782812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f056a2a9000 [ 31.783667] RBP: 00007f056a2a9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.784531] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557720857f70 [ 31.785391] R13: 00007ffd01051a10 R14: 00007ffd01051a40 R15: 00007ffd01051da0 [ 31.786265] [ 31.786560] [ 31.786774] Allocated by task 215: [ 31.787217] kasan_save_stack+0x22/0x50 [ 31.787725] kasan_set_track+0x25/0x30 [ 31.788243] __kasan_slab_alloc+0x59/0x70 [ 31.788767] kmem_cache_alloc+0x16b/0x370 [ 31.789292] vm_area_dup+0x20/0x160 [ 31.789752] __split_vma+0x170/0x950 [ 31.790215] split_vma+0xc6/0x110 [ 31.790661] mprotect_fixup+0x8d2/0xb30 [ 31.791157] do_mprotect_pkey+0x87e/0xd40 [ 31.791684] __x64_sys_mprotect+0x78/0xc0 [ 31.792216] do_syscall_64+0x3f/0x90 [ 31.792696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.793343] [ 31.793560] Freed by task 204: [ 31.793962] kasan_save_stack+0x22/0x50 [ 31.794467] kasan_set_track+0x25/0x30 [ 31.794956] kasan_save_free_info+0x2b/0x50 [ 31.795487] __kasan_slab_free+0x10a/0x190 [ 31.796052] kmem_cache_free+0x10d/0x4d0 [ 31.796570] rcu_core+0x8c8/0x2860 [ 31.797021] __do_softirq+0x1b7/0x7d4 [ 31.797497] [ 31.797714] Last potentially related work creation: [ 31.798303] kasan_save_stack+0x22/0x50 [ 31.798807] __kasan_record_aux_stack+0x8e/0xa0 [ 31.799384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.800035] remove_vma+0x139/0x170 [ 31.800485] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.801087] do_vmi_munmap+0x1f1/0x2b0 [ 31.801586] __vm_munmap+0x138/0x3a0 [ 31.802060] __x64_sys_munmap+0x59/0x80 [ 31.802555] do_syscall_64+0x3f/0x90 [ 31.803028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803677] [ 31.803891] The buggy address belongs to the object at ffff888016763e80 [ 31.803891] which belongs to the cache vm_area_struct of size 168 [ 31.805421] The buggy address is located 88 bytes inside of [ 31.805421] freed 168-byte region [ffff888016763e80, ffff888016763f28) [ 31.806842] [ 31.807055] The buggy address belongs to the physical page: [ 31.807720] page:00000000c01f1293 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16763 [ 31.808847] memcg:ffff888016836101 [ 31.809271] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.809915] page_type: 0xffffffff() [ 31.810365] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.811287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016836101 [ 31.812204] page dumped because: kasan: bad access detected [ 31.812863] [ 31.813077] Memory state around the buggy address: [ 31.813652] ffff888016763d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.814509] ffff888016763e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.815363] >ffff888016763e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.816234] ^ [ 31.816967] ffff888016763f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.817821] ffff888016763f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.818685] ================================================================== [ 31.819613] Disabling lock debugging due to kernel taint [ 33.748958] BUG: Bad rss-counter state mm:000000003ea07095 type:MM_FILEPAGES val:33 [ 33.750045] BUG: Bad rss-counter state mm:000000003ea07095 type:MM_ANONPAGES val:22 [ 34.225469] BUG: Bad rss-counter state mm:000000000f2d946e type:MM_FILEPAGES val:33 [ 34.226227] BUG: Bad rss-counter state mm:000000000f2d946e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45008' (ECDSA) to the list of known hosts. 2023/06/20 12:56:22 fuzzer started 2023/06/20 12:56:22 dialing manager at localhost:36067 2023/06/20 12:56:22 checking machine... 2023/06/20 12:56:22 checking revisions... [ 34.867184] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:56:22 testing simple program... [ 34.899831] cgroup: Unknown subsys name 'net' [ 34.937285] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:56:21 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff88800ba50000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff88800b82f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed100174a001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--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 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=00007f0781744b90 CR3=00000000094c4000 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=322ebf8dd8bc3388974835b281c05b06 XMM02=eff9b2d0a8fce9cb000000000011a318 XMM03=2c67c8bc2e329bc3000000000011a440 XMM04=ea8d7b67edafdd1300000000000ae988 XMM05=99b94518cafcea420000000000132fc8 XMM06=00c3ffa147b8d8570000000000131db8 XMM07=fb795ef6d65770560000000000122050 XMM08=2c67c8bc2e329bc3000000000011a440 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844b88ed RDX=ffff8880168d9b40 RSI=00007fbc4817a000 RDI=00007fbc4817efff RBP=ffff888019d27e70 RSP=ffff888019d27d98 R8 =0000000000000006 R9 =00007fbc4817a000 R10=00007fbc4817f000 R11=0000000000000000 R12=00007fbc4817efff R13=00007fbc4817a000 R14=ffff888019d27e88 R15=ffff888019d27e78 RIP=ffffffff814c0378 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 00007fbc481cf900 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=00007fbc4817e008 CR3=000000000cae0000 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=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