syzkaller login: [ 38.703205] BUG: Bad rss-counter state mm:000000004f0b2446 type:MM_FILEPAGES val:33 [ 38.703906] BUG: Bad rss-counter state mm:000000004f0b2446 type:MM_ANONPAGES val:22 [ 38.912730] ================================================================== [ 38.913320] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.913913] Read of size 8 at addr ffff88800ed4f6b0 by task sshd/220 [ 38.914408] [ 38.914554] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.921290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.921910] Call Trace: [ 38.922116] [ 38.922300] dump_stack_lvl+0x91/0xf0 [ 38.922639] print_report+0xcc/0x620 [ 38.923015] ? __virt_addr_valid+0x102/0x340 [ 38.923372] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.923800] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924193] kasan_report+0xbe/0xf0 [ 38.924500] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924937] vma_interval_tree_remove+0xc75/0xec0 [ 38.925328] vma_prepare+0xc54/0x11a0 [ 38.925639] __split_vma+0x5af/0x950 [ 38.925945] ? __pfx___split_vma+0x10/0x10 [ 38.926287] ? find_held_lock+0x2c/0x110 [ 38.926631] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.931056] ? lock_is_held_type+0x9f/0x120 [ 38.931409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.931808] ? mtree_range_walk+0x632/0x900 [ 38.932170] ? mas_walk+0x5c7/0x7c0 [ 38.932480] do_vmi_munmap+0x1f1/0x2b0 [ 38.932801] mmap_region+0x1f9/0x2660 [ 38.933114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.933447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933927] ? __pfx_lock_acquire+0x10/0x10 [ 38.934311] ? __pfx_mmap_region+0x10/0x10 [ 38.934655] ? security_mmap_addr+0x7d/0xa0 [ 38.942984] ? get_unmapped_area+0x1f5/0x3f0 [ 38.943382] do_mmap+0x854/0xf00 [ 38.943714] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944080] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.944501] ksys_mmap_pgoff+0x3af/0x500 [ 38.944908] do_syscall_64+0x3f/0x90 [ 38.945257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945760] RIP: 0033:0x7fa8bd756d82 [ 38.946111] 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 [ 38.947702] RSP: 002b:00007ffd85d058b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.948344] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8bd756d82 [ 38.948997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8bcb90000 [ 38.949618] RBP: 00007fa8bcb90000 R08: 0000000000000009 R09: 0000000000001000 [ 38.950247] R10: 0000000000000812 R11: 0000000000000206 R12: 000055886fe8bec0 [ 38.958957] R13: 00007ffd85d058d0 R14: 00007ffd85d05900 R15: 00007ffd85d05c60 [ 38.959569] [ 38.959797] [ 38.959945] Allocated by task 213: [ 38.960258] kasan_save_stack+0x22/0x50 [ 38.960645] kasan_set_track+0x25/0x30 [ 38.960999] __kasan_slab_alloc+0x59/0x70 [ 38.961379] kmem_cache_alloc+0x16b/0x370 [ 38.961731] vm_area_dup+0x20/0x160 [ 38.962036] __split_vma+0x170/0x950 [ 38.962374] split_vma+0xc6/0x110 [ 38.962657] mprotect_fixup+0x8d2/0xb30 [ 38.963061] do_mprotect_pkey+0x87e/0xd40 [ 38.963397] __x64_sys_mprotect+0x78/0xc0 [ 38.963768] do_syscall_64+0x3f/0x90 [ 38.964089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964506] [ 38.964647] Freed by task 213: [ 38.964939] kasan_save_stack+0x22/0x50 [ 38.965266] kasan_set_track+0x25/0x30 [ 38.965593] kasan_save_free_info+0x2b/0x50 [ 38.965957] __kasan_slab_free+0x10a/0x190 [ 38.966297] kmem_cache_free+0x10d/0x4d0 [ 38.966645] rcu_core+0x8c8/0x2860 [ 38.971022] __do_softirq+0x1b7/0x7d4 [ 38.971373] [ 38.971533] Last potentially related work creation: [ 38.971990] kasan_save_stack+0x22/0x50 [ 38.972359] __kasan_record_aux_stack+0x8e/0xa0 [ 38.972785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.973269] remove_vma+0x139/0x170 [ 38.973606] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.974042] do_vmi_munmap+0x1f1/0x2b0 [ 38.974402] __vm_munmap+0x138/0x3a0 [ 38.974753] __x64_sys_munmap+0x59/0x80 [ 38.979182] do_syscall_64+0x3f/0x90 [ 38.979539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980045] [ 38.980203] The buggy address belongs to the object at ffff88800ed4f658 [ 38.980203] which belongs to the cache vm_area_struct of size 168 [ 38.981317] The buggy address is located 88 bytes inside of [ 38.981317] freed 168-byte region [ffff88800ed4f658, ffff88800ed4f700) [ 38.982376] [ 38.982532] The buggy address belongs to the physical page: [ 38.984961] page:00000000b2afa5a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed4f [ 38.985679] memcg:ffff88800def4701 [ 38.985958] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.986419] page_type: 0xffffffff() [ 38.986720] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.987393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800def4701 [ 38.987987] page dumped because: kasan: bad access detected [ 38.988419] [ 38.988562] Memory state around the buggy address: [ 38.988971] ffff88800ed4f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.989523] ffff88800ed4f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.990085] >ffff88800ed4f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.990647] ^ [ 38.991137] ffff88800ed4f700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.991781] ffff88800ed4f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.992448] ================================================================== [ 38.993593] Disabling lock debugging due to kernel taint [ 41.603782] BUG: Bad rss-counter state mm:00000000f1320004 type:MM_FILEPAGES val:33 [ 41.604566] BUG: Bad rss-counter state mm:00000000f1320004 type:MM_ANONPAGES val:22 [ 42.729401] BUG: Bad rss-counter state mm:00000000ca36786f type:MM_FILEPAGES val:33 [ 42.735427] BUG: Bad rss-counter state mm:00000000ca36786f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32639' (ECDSA) to the list of known hosts. 2023/06/21 10:10:13 fuzzer started 2023/06/21 10:10:13 dialing manager at localhost:36067 2023/06/21 10:10:13 checking machine... 2023/06/21 10:10:13 checking revisions... [ 43.646650] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:10:13 testing simple program... [ 43.723449] cgroup: Unknown subsys name 'net' [ 43.775536] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:13 Registers: info registers vcpu 0 RAX=0000000000000047 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff825054a5 RDI=ffffffff87f6f0a0 RBP=ffffffff87f6f060 RSP=ffff888015f97980 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000047 R11=000000003a475542 R12=0000000000000047 R13=ffffffff87f6f060 R14=0000000000000010 R15=ffffffff82505490 RIP=ffffffff825054fd 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=00007f358234a228 CR3=000000000ea44000 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=2032313a30313a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a30313a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfca5 RBX=ffffffff85dfe528 RCX=ffffffff8180effd RDX=0000000000000000 RSI=ffffffff861395f4 RDI=ffffffff85dfe50c RBP=ffffffff85dfe528 RSP=ffff8880169af3a8 R8 =ffffffff861395f4 R9 =ffff8880169af4a0 R10=0000000000038001 R11=0000000000020ed2 R12=ffffffff85dfe528 R13=ffffffff85dfe50c R14=ffffffff85dfe524 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 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=00007f28664bb6f8 CR3=00000000147b8000 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