syzkaller login: [ 48.226136] BUG: Bad rss-counter state mm:00000000579cd5db type:MM_FILEPAGES val:33 [ 48.227161] BUG: Bad rss-counter state mm:00000000579cd5db type:MM_ANONPAGES val:22 [ 48.268515] ================================================================== [ 48.269454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.270334] Read of size 8 at addr ffff88800da23b38 by task sshd/221 [ 48.271060] [ 48.271267] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.272072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.272985] Call Trace: [ 48.273286] [ 48.273555] dump_stack_lvl+0x91/0xf0 [ 48.274015] print_report+0xcc/0x620 [ 48.274475] ? __virt_addr_valid+0x102/0x340 [ 48.275011] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.275595] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.276173] kasan_report+0xbe/0xf0 [ 48.276667] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.277303] vma_interval_tree_remove+0xc75/0xec0 [ 48.277905] vma_prepare+0xc54/0x11a0 [ 48.278386] __split_vma+0x5af/0x950 [ 48.278884] ? __pfx___split_vma+0x10/0x10 [ 48.279422] ? find_held_lock+0x2c/0x110 [ 48.279951] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.280509] ? lock_is_held_type+0x9f/0x120 [ 48.281057] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.281665] ? mtree_range_walk+0x632/0x900 [ 48.282226] ? mas_walk+0x5c7/0x7c0 [ 48.282721] do_vmi_munmap+0x1f1/0x2b0 [ 48.283214] mmap_region+0x1f9/0x2660 [ 48.283695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.284213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.284938] ? __pfx_lock_acquire+0x10/0x10 [ 48.285473] ? __pfx_mmap_region+0x10/0x10 [ 48.286015] ? security_mmap_addr+0x7d/0xa0 [ 48.286563] ? get_unmapped_area+0x1f5/0x3f0 [ 48.287118] do_mmap+0x854/0xf00 [ 48.287560] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.288067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.288641] ksys_mmap_pgoff+0x3af/0x500 [ 48.289150] do_syscall_64+0x3f/0x90 [ 48.289633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.290275] RIP: 0033:0x7f2d155bed82 [ 48.290746] 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 [ 48.292880] RSP: 002b:00007ffc493eb0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.293795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d155bed82 [ 48.294656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d149f8000 [ 48.295508] RBP: 00007f2d149f8000 R08: 0000000000000009 R09: 0000000000001000 [ 48.296361] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610453bcec0 [ 48.297216] R13: 00007ffc493eb0d0 R14: 00007ffc493eb100 R15: 00007ffc493eb460 [ 48.298077] [ 48.298374] [ 48.298617] Allocated by task 214: [ 48.299052] kasan_save_stack+0x22/0x50 [ 48.299564] kasan_set_track+0x25/0x30 [ 48.300057] __kasan_slab_alloc+0x59/0x70 [ 48.300591] kmem_cache_alloc+0x16b/0x370 [ 48.301108] vm_area_dup+0x20/0x160 [ 48.301561] __split_vma+0x170/0x950 [ 48.302030] split_vma+0xc6/0x110 [ 48.302469] mprotect_fixup+0x8d2/0xb30 [ 48.302980] do_mprotect_pkey+0x87e/0xd40 [ 48.303506] __x64_sys_mprotect+0x78/0xc0 [ 48.304030] do_syscall_64+0x3f/0x90 [ 48.304509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.305152] [ 48.305371] Freed by task 214: [ 48.305764] kasan_save_stack+0x22/0x50 [ 48.306266] kasan_set_track+0x25/0x30 [ 48.306788] kasan_save_free_info+0x2b/0x50 [ 48.307317] __kasan_slab_free+0x10a/0x190 [ 48.307853] kmem_cache_free+0x10d/0x4d0 [ 48.308364] rcu_core+0x8c8/0x2860 [ 48.308810] __do_softirq+0x1b7/0x7d4 [ 48.309284] [ 48.309507] Last potentially related work creation: [ 48.310089] kasan_save_stack+0x22/0x50 [ 48.310601] __kasan_record_aux_stack+0x8e/0xa0 [ 48.311178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.311821] remove_vma+0x139/0x170 [ 48.312277] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.312833] do_vmi_munmap+0x1f1/0x2b0 [ 48.313320] __vm_munmap+0x138/0x3a0 [ 48.313789] __x64_sys_munmap+0x59/0x80 [ 48.314285] do_syscall_64+0x3f/0x90 [ 48.314771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.315420] [ 48.315633] The buggy address belongs to the object at ffff88800da23ae0 [ 48.315633] which belongs to the cache vm_area_struct of size 168 [ 48.317099] The buggy address is located 88 bytes inside of [ 48.317099] freed 168-byte region [ffff88800da23ae0, ffff88800da23b88) [ 48.318526] [ 48.318747] The buggy address belongs to the physical page: [ 48.319406] page:000000007d12dbdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda23 [ 48.320492] memcg:ffff888009800001 [ 48.320914] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.321565] page_type: 0xffffffff() [ 48.322014] raw: 0100000000000200 ffff88800879fc80 ffffea00003260c0 dead000000000008 [ 48.322946] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009800001 [ 48.323844] page dumped because: kasan: bad access detected [ 48.324498] [ 48.324717] Memory state around the buggy address: [ 48.325304] ffff88800da23a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.326155] ffff88800da23a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 48.327028] >ffff88800da23b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.327881] ^ [ 48.328490] ffff88800da23b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 48.329345] ffff88800da23c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 48.330206] ================================================================== [ 48.331562] Disabling lock debugging due to kernel taint [ 50.274872] BUG: Bad rss-counter state mm:0000000090e349d3 type:MM_FILEPAGES val:33 [ 50.275979] BUG: Bad rss-counter state mm:0000000090e349d3 type:MM_ANONPAGES val:22 [ 50.800799] BUG: Bad rss-counter state mm:0000000030eb3e25 type:MM_FILEPAGES val:33 [ 50.801986] BUG: Bad rss-counter state mm:0000000030eb3e25 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25406' (ECDSA) to the list of known hosts. 2023/06/20 01:18:34 fuzzer started 2023/06/20 01:18:35 dialing manager at localhost:44161 2023/06/20 01:18:35 checking machine... 2023/06/20 01:18:35 checking revisions... [ 51.424843] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:18:35 testing simple program... [ 51.471931] cgroup: Unknown subsys name 'net' [ 51.529559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:17 Registers: info registers vcpu 0 RAX=ffffffff8180995d RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800c3f7801 RSI=ffff88800c3f7838 RDI=ffff88800c3f7838 RBP=ffff88800c3f7500 RSP=ffff88800c3f7438 R8 =ffffffff861375e4 R9 =ffff88800c3f74e8 R10=0000000000038001 R11=0000000000020dae R12=ffff88800c3f7508 R13=ffff88800c3f74f0 R14=ffff88800c3f7840 R15=ffff88800c3f74a8 RIP=ffffffff81131041 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd1c1be9900 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=00007fd1c1061720 CR3=000000000c430000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e652ff4dd889d89500000000000ae988 XMM05=9299794b18ccc3030000000000133a78 XMM06=c291bd5c70af25b90000000000132b18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000016e01330b8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806cf28140 RDI=0000000000053cfc RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000efe97 R11=ffff88806cf09ff8 R12=0000000000053cfc R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 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=00007fff5d8287d8 CR3=000000000fcf4000 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=2034333a38313a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a38313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000