syzkaller login: [ 37.361761] BUG: Bad rss-counter state mm:00000000a9766680 type:MM_FILEPAGES val:33 [ 37.362858] BUG: Bad rss-counter state mm:00000000a9766680 type:MM_ANONPAGES val:22 [ 37.530254] ================================================================== [ 37.531191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.532165] Read of size 8 at addr ffff88800e085ed8 by task sshd/220 [ 37.532966] [ 37.533224] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.534458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.535443] Call Trace: [ 37.535775] [ 37.536066] dump_stack_lvl+0x91/0xf0 [ 37.536580] print_report+0xcc/0x620 [ 37.537072] ? __virt_addr_valid+0x102/0x340 [ 37.537639] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.538284] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.538945] kasan_report+0xbe/0xf0 [ 37.539432] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.540070] vma_interval_tree_remove+0xc75/0xec0 [ 37.540693] vma_prepare+0xc54/0x11a0 [ 37.541178] __split_vma+0x5af/0x950 [ 37.541677] ? __pfx___split_vma+0x10/0x10 [ 37.542219] ? find_held_lock+0x2c/0x110 [ 37.542757] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.543339] ? lock_is_held_type+0x9f/0x120 [ 37.543901] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.544520] ? mtree_range_walk+0x632/0x900 [ 37.545078] ? mas_walk+0x5c7/0x7c0 [ 37.545578] do_vmi_munmap+0x1f1/0x2b0 [ 37.546094] mmap_region+0x1f9/0x2660 [ 37.546613] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.547165] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.547919] ? __pfx_lock_acquire+0x10/0x10 [ 37.548495] ? __pfx_mmap_region+0x10/0x10 [ 37.549043] ? security_mmap_addr+0x7d/0xa0 [ 37.549609] ? get_unmapped_area+0x1f5/0x3f0 [ 37.550176] do_mmap+0x854/0xf00 [ 37.550625] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.551129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.551714] ksys_mmap_pgoff+0x3af/0x500 [ 37.552246] do_syscall_64+0x3f/0x90 [ 37.552741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.553402] RIP: 0033:0x7f9238c54d82 [ 37.553880] 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 [ 37.556070] RSP: 002b:00007ffe5f76e198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.556997] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9238c54d82 [ 37.557898] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f923808e000 [ 37.558825] RBP: 00007f923808e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.559693] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8be3b1d90 [ 37.560552] R13: 00007ffe5f76e1b0 R14: 00007ffe5f76e1e0 R15: 00007ffe5f76e540 [ 37.561420] [ 37.561735] [ 37.561964] Allocated by task 213: [ 37.562457] kasan_save_stack+0x22/0x50 [ 37.562992] kasan_set_track+0x25/0x30 [ 37.563496] __kasan_slab_alloc+0x59/0x70 [ 37.564028] kmem_cache_alloc+0x16b/0x370 [ 37.564562] vm_area_dup+0x20/0x160 [ 37.565014] __split_vma+0x170/0x950 [ 37.565504] split_vma+0xc6/0x110 [ 37.565974] mprotect_fixup+0x8d2/0xb30 [ 37.566498] do_mprotect_pkey+0x87e/0xd40 [ 37.567031] __x64_sys_mprotect+0x78/0xc0 [ 37.567576] do_syscall_64+0x3f/0x90 [ 37.568046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.568709] [ 37.568927] Freed by task 213: [ 37.569319] kasan_save_stack+0x22/0x50 [ 37.569834] kasan_set_track+0x25/0x30 [ 37.570353] kasan_save_free_info+0x2b/0x50 [ 37.570902] __kasan_slab_free+0x10a/0x190 [ 37.571440] kmem_cache_free+0x10d/0x4d0 [ 37.571956] rcu_core+0x8c8/0x2860 [ 37.572399] __do_softirq+0x1b7/0x7d4 [ 37.572888] [ 37.573101] Last potentially related work creation: [ 37.573708] kasan_save_stack+0x22/0x50 [ 37.574237] __kasan_record_aux_stack+0x8e/0xa0 [ 37.575000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.575697] remove_vma+0x139/0x170 [ 37.576151] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.576726] do_vmi_munmap+0x1f1/0x2b0 [ 37.577211] __vm_munmap+0x138/0x3a0 [ 37.577695] __x64_sys_munmap+0x59/0x80 [ 37.578222] do_syscall_64+0x3f/0x90 [ 37.578713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.579353] [ 37.579587] Second to last potentially related work creation: [ 37.580275] kasan_save_stack+0x22/0x50 [ 37.580788] __kasan_record_aux_stack+0x8e/0xa0 [ 37.581361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.582015] remove_vma+0x139/0x170 [ 37.582478] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.583047] do_vmi_munmap+0x1f1/0x2b0 [ 37.583548] mmap_region+0x1f9/0x2660 [ 37.584030] do_mmap+0x854/0xf00 [ 37.584467] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.584981] ksys_mmap_pgoff+0x3af/0x500 [ 37.585491] do_syscall_64+0x3f/0x90 [ 37.586014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.586691] [ 37.586905] The buggy address belongs to the object at ffff88800e085e80 [ 37.586905] which belongs to the cache vm_area_struct of size 168 [ 37.588392] The buggy address is located 88 bytes inside of [ 37.588392] freed 168-byte region [ffff88800e085e80, ffff88800e085f28) [ 37.589828] [ 37.590067] The buggy address belongs to the physical page: [ 37.590740] page:00000000b69e68a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe085 [ 37.591839] memcg:ffff88800d7c2201 [ 37.592261] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.592976] page_type: 0xffffffff() [ 37.593423] raw: 0100000000000200 ffff88800879fc80 ffffea00003a7e00 dead000000000005 [ 37.594376] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7c2201 [ 37.595298] page dumped because: kasan: bad access detected [ 37.595974] [ 37.596199] Memory state around the buggy address: [ 37.596799] ffff88800e085d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.597665] ffff88800e085e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.598548] >ffff88800e085e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.599473] ^ [ 37.600337] ffff88800e085f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 37.601206] ffff88800e085f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.602103] ================================================================== [ 37.603088] Disabling lock debugging due to kernel taint [ 39.895581] BUG: Bad rss-counter state mm:00000000a271ee7e type:MM_FILEPAGES val:33 [ 39.897069] BUG: Bad rss-counter state mm:00000000a271ee7e type:MM_ANONPAGES val:22 [ 40.406553] BUG: Bad rss-counter state mm:00000000d4800a30 type:MM_FILEPAGES val:33 [ 40.407713] BUG: Bad rss-counter state mm:00000000d4800a30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11894' (ECDSA) to the list of known hosts. 2023/06/19 13:27:54 fuzzer started 2023/06/19 13:27:54 dialing manager at localhost:44161 2023/06/19 13:27:54 checking machine... 2023/06/19 13:27:54 checking revisions... [ 41.155443] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:27:54 testing simple program... [ 41.193422] cgroup: Unknown subsys name 'net' [ 41.260801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:47 Registers: info registers vcpu 0 RAX=1ffffffff0c0a964 RBX=ffffffff86054b24 RCX=ffffffff86605df8 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86054830 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86054e18 R13=ffffffff85d793d4 R14=ffffffff8605482c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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=00007fff15119998 CR3=0000000018128000 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=2033353a37323a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000516b8ad7 RBX=00000000479a8bef RCX=ffff888015c2fa40 RDX=000000000000000e RSI=0000000000000010 RDI=00000000a4e03a1a RBP=ffff8880087b03c0 RSP=ffff888015c2f9a8 R8 =00000000e97fb22d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff888015c2fa10 R15=000000000000000e RIP=ffffffff82270ead RFL=00000a93 [-OS-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 00007f93687ed900 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=00007f9368da4618 CR3=0000000016606000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000