syzkaller login: [ 34.365303] BUG: Bad rss-counter state mm:0000000072780fe1 type:MM_FILEPAGES val:33 [ 34.366763] BUG: Bad rss-counter state mm:0000000072780fe1 type:MM_ANONPAGES val:22 [ 34.523377] ================================================================== [ 34.524333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.525267] Read of size 8 at addr ffff8880199a6228 by task sshd/220 [ 34.526071] [ 34.526403] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.527285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.528285] Call Trace: [ 34.528630] [ 34.528922] dump_stack_lvl+0x91/0xf0 [ 34.529422] print_report+0xcc/0x620 [ 34.529932] ? __virt_addr_valid+0x102/0x340 [ 34.530505] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.531146] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.531770] kasan_report+0xbe/0xf0 [ 34.532253] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.532884] vma_interval_tree_remove+0xc75/0xec0 [ 34.533493] vma_prepare+0xc54/0x11a0 [ 34.533985] __split_vma+0x5af/0x950 [ 34.534461] ? __pfx___split_vma+0x10/0x10 [ 34.534996] ? find_held_lock+0x2c/0x110 [ 34.535521] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.536103] ? lock_is_held_type+0x9f/0x120 [ 34.536639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.537255] ? mtree_range_walk+0x632/0x900 [ 34.537821] ? mas_walk+0x5c7/0x7c0 [ 34.538292] do_vmi_munmap+0x1f1/0x2b0 [ 34.538779] mmap_region+0x1f9/0x2660 [ 34.539259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.539777] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.540488] ? __pfx_lock_acquire+0x10/0x10 [ 34.541014] ? __pfx_mmap_region+0x10/0x10 [ 34.541559] ? security_mmap_addr+0x7d/0xa0 [ 34.542097] ? get_unmapped_area+0x1f5/0x3f0 [ 34.542648] do_mmap+0x854/0xf00 [ 34.543087] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.543581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.544147] ksys_mmap_pgoff+0x3af/0x500 [ 34.544651] do_syscall_64+0x3f/0x90 [ 34.545132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.545801] RIP: 0033:0x7f55747c7d82 [ 34.546257] 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 [ 34.548403] RSP: 002b:00007fff9e2f4448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.549309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55747c7d82 [ 34.550171] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5573c01000 [ 34.551025] RBP: 00007f5573c01000 R08: 0000000000000009 R09: 0000000000001000 [ 34.551880] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ee12a2f70 [ 34.552726] R13: 00007fff9e2f4460 R14: 00007fff9e2f4490 R15: 00007fff9e2f47f0 [ 34.553595] [ 34.553895] [ 34.554109] Allocated by task 213: [ 34.554542] kasan_save_stack+0x22/0x50 [ 34.555066] kasan_set_track+0x25/0x30 [ 34.555564] __kasan_slab_alloc+0x59/0x70 [ 34.556088] kmem_cache_alloc+0x16b/0x370 [ 34.556608] vm_area_dup+0x20/0x160 [ 34.557069] __split_vma+0x170/0x950 [ 34.557551] split_vma+0xc6/0x110 [ 34.557993] mprotect_fixup+0x8d2/0xb30 [ 34.558492] do_mprotect_pkey+0x87e/0xd40 [ 34.559022] __x64_sys_mprotect+0x78/0xc0 [ 34.559540] do_syscall_64+0x3f/0x90 [ 34.560020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.560658] [ 34.560875] Freed by task 213: [ 34.561279] kasan_save_stack+0x22/0x50 [ 34.561808] kasan_set_track+0x25/0x30 [ 34.562298] kasan_save_free_info+0x2b/0x50 [ 34.562842] __kasan_slab_free+0x10a/0x190 [ 34.563371] kmem_cache_free+0x10d/0x4d0 [ 34.563872] rcu_core+0x8c8/0x2860 [ 34.564320] __do_softirq+0x1b7/0x7d4 [ 34.564802] [ 34.565018] Last potentially related work creation: [ 34.565629] kasan_save_stack+0x22/0x50 [ 34.566135] __kasan_record_aux_stack+0x8e/0xa0 [ 34.566710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.567367] remove_vma+0x139/0x170 [ 34.567817] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.568377] do_vmi_munmap+0x1f1/0x2b0 [ 34.568865] __vm_munmap+0x138/0x3a0 [ 34.569335] __x64_sys_munmap+0x59/0x80 [ 34.569840] do_syscall_64+0x3f/0x90 [ 34.570310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.570957] [ 34.571175] The buggy address belongs to the object at ffff8880199a61d0 [ 34.571175] which belongs to the cache vm_area_struct of size 168 [ 34.572625] The buggy address is located 88 bytes inside of [ 34.572625] freed 168-byte region [ffff8880199a61d0, ffff8880199a6278) [ 34.574036] [ 34.574254] The buggy address belongs to the physical page: [ 34.574929] page:00000000d28e41de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199a6 [ 34.576041] memcg:ffff888016b59e01 [ 34.576469] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.577112] page_type: 0xffffffff() [ 34.577575] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.578514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b59e01 [ 34.579434] page dumped because: kasan: bad access detected [ 34.580097] [ 34.580311] Memory state around the buggy address: [ 34.580901] ffff8880199a6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.581785] ffff8880199a6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.582646] >ffff8880199a6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.583501] ^ [ 34.584084] ffff8880199a6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.584975] ffff8880199a6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.585871] ================================================================== [ 34.587047] Disabling lock debugging due to kernel taint [ 36.598919] BUG: Bad rss-counter state mm:00000000beaad801 type:MM_FILEPAGES val:33 [ 36.600401] BUG: Bad rss-counter state mm:00000000beaad801 type:MM_ANONPAGES val:22 [ 37.146081] BUG: Bad rss-counter state mm:00000000b2908cb9 type:MM_FILEPAGES val:33 [ 37.147255] BUG: Bad rss-counter state mm:00000000b2908cb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28190' (ECDSA) to the list of known hosts. 2023/06/19 22:06:36 fuzzer started 2023/06/19 22:06:36 dialing manager at localhost:44161 2023/06/19 22:06:36 checking machine... 2023/06/19 22:06:36 checking revisions... [ 37.829102] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:06:36 testing simple program... [ 37.872975] cgroup: Unknown subsys name 'net' [ 37.940661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81b3c663 RDX=ffff8880097c8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016170a80 RSP=ffff8880098df790 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800b569938 R14=ffff888016302068 R15=ffff8880098df8c0 RIP=ffffffff814c07e0 RFL=00000246 [---Z-P-] 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 00007f4d8ac85900 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=00007f4d8a0a8690 CR3=000000000d80e000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=58a113474b990c7000000000000ae988 XMM05=a8c5a6c805aabd2d0000000000134b70 XMM06=c291bd5c70af25b90000000000133c10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff88800f5b3000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8364d62e RDI=ffff8880191e5704 RBP=ffff8880191e5640 RSP=ffff88800f21fd68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f5b3000 R13=0000000000000000 R14=ffffffff87f94640 R15=0000000000000001 RIP=ffffffff8364d657 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 00007f59298c4900 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=00007f5929e7b618 CR3=000000000ec46000 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