syzkaller login: [ 38.495726] BUG: Bad rss-counter state mm:00000000910a97ed type:MM_FILEPAGES val:33 [ 38.496504] BUG: Bad rss-counter state mm:00000000910a97ed type:MM_ANONPAGES val:22 [ 38.667036] ================================================================== [ 38.667704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.668378] Read of size 8 at addr ffff888016668968 by task sshd/230 [ 38.668933] [ 38.669123] CPU: 1 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.669736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.670425] Call Trace: [ 38.670657] [ 38.670891] dump_stack_lvl+0x91/0xf0 [ 38.671640] print_report+0xcc/0x620 [ 38.672042] ? __virt_addr_valid+0x102/0x340 [ 38.672440] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.672883] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.673344] kasan_report+0xbe/0xf0 [ 38.673692] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.674143] vma_interval_tree_remove+0xc75/0xec0 [ 38.674582] vma_prepare+0xc54/0x11a0 [ 38.674927] __split_vma+0x5af/0x950 [ 38.675277] ? __pfx___split_vma+0x10/0x10 [ 38.675666] ? find_held_lock+0x2c/0x110 [ 38.676051] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.676464] ? lock_is_held_type+0x9f/0x120 [ 38.676859] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.677313] ? mtree_range_walk+0x632/0x900 [ 38.677715] ? mas_walk+0x5c7/0x7c0 [ 38.678070] do_vmi_munmap+0x1f1/0x2b0 [ 38.678428] mmap_region+0x1f9/0x2660 [ 38.678789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.679173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.679700] ? __pfx_lock_acquire+0x10/0x10 [ 38.680097] ? __pfx_mmap_region+0x10/0x10 [ 38.680490] ? security_mmap_addr+0x7d/0xa0 [ 38.680887] ? get_unmapped_area+0x1f5/0x3f0 [ 38.681313] do_mmap+0x854/0xf00 [ 38.681639] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.681998] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.682403] ksys_mmap_pgoff+0x3af/0x500 [ 38.682769] do_syscall_64+0x3f/0x90 [ 38.683119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.683595] RIP: 0033:0x7f1b4313fd82 [ 38.683928] 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 [ 38.685484] RSP: 002b:00007ffdf865e638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.686139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b4313fd82 [ 38.686764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b42579000 [ 38.687372] RBP: 00007f1b42579000 R08: 0000000000000009 R09: 0000000000001000 [ 38.687983] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6ad98dec0 [ 38.688591] R13: 00007ffdf865e650 R14: 00007ffdf865e680 R15: 00007ffdf865e9e0 [ 38.689255] [ 38.689467] [ 38.689624] Allocated by task 221: [ 38.689947] kasan_save_stack+0x22/0x50 [ 38.690309] kasan_set_track+0x25/0x30 [ 38.690665] __kasan_slab_alloc+0x59/0x70 [ 38.691042] kmem_cache_alloc+0x16b/0x370 [ 38.691417] vm_area_dup+0x20/0x160 [ 38.691750] __split_vma+0x170/0x950 [ 38.692091] split_vma+0xc6/0x110 [ 38.692411] mprotect_fixup+0x8d2/0xb30 [ 38.692772] do_mprotect_pkey+0x87e/0xd40 [ 38.693186] __x64_sys_mprotect+0x78/0xc0 [ 38.693566] do_syscall_64+0x3f/0x90 [ 38.693916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.694387] [ 38.694541] Freed by task 205: [ 38.694824] kasan_save_stack+0x22/0x50 [ 38.695188] kasan_set_track+0x25/0x30 [ 38.695560] kasan_save_free_info+0x2b/0x50 [ 38.695952] __kasan_slab_free+0x10a/0x190 [ 38.696343] kmem_cache_free+0x10d/0x4d0 [ 38.696720] rcu_core+0x8c8/0x2860 [ 38.697052] __do_softirq+0x1b7/0x7d4 [ 38.697414] [ 38.697568] Last potentially related work creation: [ 38.698008] kasan_save_stack+0x22/0x50 [ 38.698362] __kasan_record_aux_stack+0x8e/0xa0 [ 38.698782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.699245] remove_vma+0x139/0x170 [ 38.699578] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.700026] do_vmi_munmap+0x1f1/0x2b0 [ 38.700384] __vm_munmap+0x138/0x3a0 [ 38.700727] __x64_sys_munmap+0x59/0x80 [ 38.701105] do_syscall_64+0x3f/0x90 [ 38.701454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.701923] [ 38.702085] The buggy address belongs to the object at ffff888016668910 [ 38.702085] which belongs to the cache vm_area_struct of size 168 [ 38.703145] The buggy address is located 88 bytes inside of [ 38.703145] freed 168-byte region [ffff888016668910, ffff8880166689b8) [ 38.704167] [ 38.704330] The buggy address belongs to the physical page: [ 38.704840] page:00000000ac28a962 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16668 [ 38.705681] memcg:ffff88800fef5301 [ 38.706024] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.706491] page_type: 0xffffffff() [ 38.706815] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.707488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fef5301 [ 38.708150] page dumped because: kasan: bad access detected [ 38.708636] [ 38.708791] Memory state around the buggy address: [ 38.709219] ffff888016668800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.709852] ffff888016668880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.710477] >ffff888016668900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.711114] ^ [ 38.711680] ffff888016668980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.712316] ffff888016668a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.712939] ================================================================== [ 38.713659] Disabling lock debugging due to kernel taint [ 40.469729] BUG: Bad rss-counter state mm:00000000f6f88512 type:MM_FILEPAGES val:33 [ 40.471210] BUG: Bad rss-counter state mm:00000000f6f88512 type:MM_ANONPAGES val:22 [ 40.990174] BUG: Bad rss-counter state mm:000000000ec43f42 type:MM_FILEPAGES val:33 [ 40.990938] BUG: Bad rss-counter state mm:000000000ec43f42 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29018' (ECDSA) to the list of known hosts. 2023/06/21 08:02:08 fuzzer started 2023/06/21 08:02:09 dialing manager at localhost:36067 2023/06/21 08:02:09 checking machine... 2023/06/21 08:02:09 checking revisions... [ 41.713848] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:02:09 testing simple program... [ 41.772982] cgroup: Unknown subsys name 'net' [ 41.838923] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:02:08 Registers: info registers vcpu 0 RAX=ffffffff83969184 RBX=ffffffff85fcd8c8 RCX=ffffffff8396914a RDX=0000000000000000 RSI=ffffffff863f0376 RDI=ffffffff85fcd8b8 RBP=ffffffff85fcd8b8 RSP=ffff88806ce08548 R8 =ffffffff863f0376 R9 =ffff88806ce08640 R10=0000000000038001 R11=0000000000094bbd R12=ffffffff85fcd8c4 R13=ffffffff85fcd8b8 R14=ffffffff85fcd8b8 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000287 [--S--PC] 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=00007fe3d8a94328 CR3=0000000006b5c000 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=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 info registers vcpu 1 RAX=ffffffff8609e397 RBX=0000000000000001 RCX=ffffffff8609e392 RDX=0000000000000000 RSI=1ffffffff0c13c72 RDI=ffffffff85d96e20 RBP=ffff88800ecef650 RSP=ffff88800ecef588 R8 =ffffffff8609e392 R9 =ffff88800ecef638 R10=0000000000038001 R11=0000000000007117 R12=ffff88800ecef658 R13=ffff88800ecef640 R14=ffff88800ecef639 R15=ffff88800ecef5f8 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007f04637d1900 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=00007f569f560030 CR3=0000000019c9c000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000