syzkaller login: [ 31.169162] BUG: Bad rss-counter state mm:000000000fb99b82 type:MM_FILEPAGES val:33 [ 31.170430] BUG: Bad rss-counter state mm:000000000fb99b82 type:MM_ANONPAGES val:22 [ 31.250722] ================================================================== [ 31.251621] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.252566] Read of size 8 at addr ffff8880183df3f8 by task sshd/221 [ 31.253549] [ 31.253786] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.254689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.255685] Call Trace: [ 31.256002] [ 31.256283] dump_stack_lvl+0x91/0xf0 [ 31.256776] print_report+0xcc/0x620 [ 31.257261] ? __virt_addr_valid+0x102/0x340 [ 31.257807] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258502] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.259148] kasan_report+0xbe/0xf0 [ 31.259630] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260251] vma_interval_tree_remove+0xc75/0xec0 [ 31.260860] vma_prepare+0xc54/0x11a0 [ 31.261343] __split_vma+0x5af/0x950 [ 31.261821] ? __pfx___split_vma+0x10/0x10 [ 31.262370] ? find_held_lock+0x2c/0x110 [ 31.262887] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.263452] ? lock_is_held_type+0x9f/0x120 [ 31.263989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.264606] ? mtree_range_walk+0x632/0x900 [ 31.265159] ? mas_walk+0x5c7/0x7c0 [ 31.265631] do_vmi_munmap+0x1f1/0x2b0 [ 31.266160] mmap_region+0x1f9/0x2660 [ 31.266645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.267178] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.267896] ? __pfx_lock_acquire+0x10/0x10 [ 31.268442] ? __pfx_mmap_region+0x10/0x10 [ 31.268973] ? security_mmap_addr+0x7d/0xa0 [ 31.269505] ? get_unmapped_area+0x1f5/0x3f0 [ 31.270065] do_mmap+0x854/0xf00 [ 31.270512] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.271004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.271567] ksys_mmap_pgoff+0x3af/0x500 [ 31.272069] do_syscall_64+0x3f/0x90 [ 31.272546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273189] RIP: 0033:0x7f7ccfa5bd82 [ 31.273640] 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 [ 31.275812] RSP: 002b:00007fff180fa718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.276719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ccfa5bd82 [ 31.277575] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ccee95000 [ 31.278456] RBP: 00007f7ccee95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.279291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba460c7f70 [ 31.280132] R13: 00007fff180fa730 R14: 00007fff180fa760 R15: 00007fff180faac0 [ 31.280986] [ 31.281276] [ 31.281488] Allocated by task 214: [ 31.281915] kasan_save_stack+0x22/0x50 [ 31.282584] kasan_set_track+0x25/0x30 [ 31.283191] __kasan_slab_alloc+0x59/0x70 [ 31.283826] kmem_cache_alloc+0x16b/0x370 [ 31.284445] vm_area_dup+0x20/0x160 [ 31.284994] __split_vma+0x170/0x950 [ 31.285553] split_vma+0xc6/0x110 [ 31.286111] mprotect_fixup+0x8d2/0xb30 [ 31.286713] do_mprotect_pkey+0x87e/0xd40 [ 31.287343] __x64_sys_mprotect+0x78/0xc0 [ 31.287970] do_syscall_64+0x3f/0x90 [ 31.288548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289326] [ 31.289585] Freed by task 204: [ 31.290074] kasan_save_stack+0x22/0x50 [ 31.290684] kasan_set_track+0x25/0x30 [ 31.291288] kasan_save_free_info+0x2b/0x50 [ 31.291944] __kasan_slab_free+0x10a/0x190 [ 31.292593] kmem_cache_free+0x10d/0x4d0 [ 31.293208] rcu_core+0x8c8/0x2860 [ 31.293738] __do_softirq+0x1b7/0x7d4 [ 31.294323] [ 31.294585] Last potentially related work creation: [ 31.295324] kasan_save_stack+0x22/0x50 [ 31.295941] __kasan_record_aux_stack+0x8e/0xa0 [ 31.296633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.297416] remove_vma+0x139/0x170 [ 31.297961] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.298668] do_vmi_munmap+0x1f1/0x2b0 [ 31.299161] __vm_munmap+0x138/0x3a0 [ 31.299620] __x64_sys_munmap+0x59/0x80 [ 31.300111] do_syscall_64+0x3f/0x90 [ 31.300578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301211] [ 31.301424] The buggy address belongs to the object at ffff8880183df3a0 [ 31.301424] which belongs to the cache vm_area_struct of size 168 [ 31.302878] The buggy address is located 88 bytes inside of [ 31.302878] freed 168-byte region [ffff8880183df3a0, ffff8880183df448) [ 31.304276] [ 31.304489] The buggy address belongs to the physical page: [ 31.305143] page:00000000fb899ad7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183df [ 31.306235] memcg:ffff88800c5f6a01 [ 31.306658] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.307296] page_type: 0xffffffff() [ 31.307741] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.308647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5f6a01 [ 31.309556] page dumped because: kasan: bad access detected [ 31.310230] [ 31.310444] Memory state around the buggy address: [ 31.311016] ffff8880183df280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.311858] ffff8880183df300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.312703] >ffff8880183df380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.313544] ^ [ 31.314379] ffff8880183df400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.315230] ffff8880183df480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.316065] ================================================================== [ 31.317361] Disabling lock debugging due to kernel taint [ 33.230806] BUG: Bad rss-counter state mm:00000000fda5f7ed type:MM_FILEPAGES val:33 [ 33.231819] BUG: Bad rss-counter state mm:00000000fda5f7ed type:MM_ANONPAGES val:22 [ 33.619066] BUG: Bad rss-counter state mm:0000000025510e2a type:MM_FILEPAGES val:33 [ 33.620144] BUG: Bad rss-counter state mm:0000000025510e2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61857' (ECDSA) to the list of known hosts. 2023/06/19 13:37:01 fuzzer started 2023/06/19 13:37:01 dialing manager at localhost:44161 2023/06/19 13:37:01 checking machine... 2023/06/19 13:37:01 checking revisions... [ 34.306457] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:37:01 testing simple program... [ 34.364528] cgroup: Unknown subsys name 'net' [ 34.416049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:37:00 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff8880142afa3a RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818c21ef RDI=ffff8880142afa34 RBP=ffff8880142afa28 RSP=ffff8880142af958 R8 =0000000000000006 R9 =000000000000c350 R10=000000000007a11e R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=ffff8880142afa30 R15=dffffc0000000000 RIP=ffffffff818c220c 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 00007f86d7da6900 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=00007ffd3141d000 CR3=0000000019f4e000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f2fa9b67028 CR3=000000000d710000 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=99b0fd95897fa1ae3646ad5ad3ae352a XMM02=000000000011c8e0ec2efd57dc4c00df XMM03=0000000000123670ddf5f69453d6174f XMM04=d35d73bb70e24a6f00000000000ae988 XMM05=fa0c8433109afbf900000000001342a0 XMM06=c291bd5c70af25b90000000000133340 XMM07=e042d86d42eb936e00000000001238f0 XMM08=ddf5f69453d6174f000000000011c940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000