syzkaller login: [ 30.239497] BUG: Bad rss-counter state mm:00000000a11958cf type:MM_FILEPAGES val:33 [ 30.240686] BUG: Bad rss-counter state mm:00000000a11958cf type:MM_ANONPAGES val:22 [ 30.281860] ================================================================== [ 30.282821] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.283763] Read of size 8 at addr ffff88800e75c6b0 by task sshd/219 [ 30.284547] [ 30.284765] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.285631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.286602] Call Trace: [ 30.286924] [ 30.287208] dump_stack_lvl+0x91/0xf0 [ 30.287708] print_report+0xcc/0x620 [ 30.288212] ? __virt_addr_valid+0x102/0x340 [ 30.288928] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.289560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.290184] kasan_report+0xbe/0xf0 [ 30.290664] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.291309] vma_interval_tree_remove+0xc75/0xec0 [ 30.291930] vma_prepare+0xc54/0x11a0 [ 30.292439] __split_vma+0x5af/0x950 [ 30.292934] ? __pfx___split_vma+0x10/0x10 [ 30.293497] ? find_held_lock+0x2c/0x110 [ 30.294041] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.294630] ? lock_is_held_type+0x9f/0x120 [ 30.295193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.295823] ? mtree_range_walk+0x632/0x900 [ 30.296425] ? mas_walk+0x5c7/0x7c0 [ 30.296934] do_vmi_munmap+0x1f1/0x2b0 [ 30.297453] mmap_region+0x1f9/0x2660 [ 30.297960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.298506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.299271] ? __pfx_lock_acquire+0x10/0x10 [ 30.299837] ? __pfx_mmap_region+0x10/0x10 [ 30.300416] ? security_mmap_addr+0x7d/0xa0 [ 30.301021] ? get_unmapped_area+0x1f5/0x3f0 [ 30.301688] do_mmap+0x854/0xf00 [ 30.302207] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.302808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.303502] ksys_mmap_pgoff+0x3af/0x500 [ 30.304118] do_syscall_64+0x3f/0x90 [ 30.304722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.305496] RIP: 0033:0x7fbbe519bd82 [ 30.306057] 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 [ 30.308653] RSP: 002b:00007ffc31b7ff88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.309749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbe519bd82 [ 30.310778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbe45d5000 [ 30.311812] RBP: 00007fbbe45d5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.312869] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b83087cec0 [ 30.313905] R13: 00007ffc31b7ffa0 R14: 00007ffc31b7ffd0 R15: 00007ffc31b80330 [ 30.314954] [ 30.315314] [ 30.315570] Allocated by task 212: [ 30.316105] kasan_save_stack+0x22/0x50 [ 30.316717] kasan_set_track+0x25/0x30 [ 30.317327] __kasan_slab_alloc+0x59/0x70 [ 30.317963] kmem_cache_alloc+0x16b/0x370 [ 30.318579] vm_area_dup+0x20/0x160 [ 30.319132] __split_vma+0x170/0x950 [ 30.319699] split_vma+0xc6/0x110 [ 30.320248] mprotect_fixup+0x8d2/0xb30 [ 30.320856] do_mprotect_pkey+0x87e/0xd40 [ 30.321478] __x64_sys_mprotect+0x78/0xc0 [ 30.322110] do_syscall_64+0x3f/0x90 [ 30.322690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323478] [ 30.323743] Freed by task 212: [ 30.324224] kasan_save_stack+0x22/0x50 [ 30.324833] kasan_set_track+0x25/0x30 [ 30.325432] kasan_save_free_info+0x2b/0x50 [ 30.326074] __kasan_slab_free+0x10a/0x190 [ 30.326723] kmem_cache_free+0x10d/0x4d0 [ 30.327349] rcu_core+0x8c8/0x2860 [ 30.327883] __do_softirq+0x1b7/0x7d4 [ 30.328470] [ 30.328737] Last potentially related work creation: [ 30.329441] kasan_save_stack+0x22/0x50 [ 30.330049] __kasan_record_aux_stack+0x8e/0xa0 [ 30.330745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.331529] remove_vma+0x139/0x170 [ 30.332035] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.332646] do_vmi_munmap+0x1f1/0x2b0 [ 30.333205] __vm_munmap+0x138/0x3a0 [ 30.333742] __x64_sys_munmap+0x59/0x80 [ 30.334310] do_syscall_64+0x3f/0x90 [ 30.334856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.335597] [ 30.335844] The buggy address belongs to the object at ffff88800e75c658 [ 30.335844] which belongs to the cache vm_area_struct of size 168 [ 30.337546] The buggy address is located 88 bytes inside of [ 30.337546] freed 168-byte region [ffff88800e75c658, ffff88800e75c700) [ 30.339168] [ 30.339414] The buggy address belongs to the physical page: [ 30.340193] page:00000000dcab2ff6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe75c [ 30.341469] memcg:ffff88800c9c9b01 [ 30.341965] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.342715] page_type: 0xffffffff() [ 30.343236] raw: 0100000000000200 ffff8880087a0c80 ffffea000035ad00 000000000000000c [ 30.344313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9c9b01 [ 30.345352] page dumped because: kasan: bad access detected [ 30.346113] [ 30.346360] Memory state around the buggy address: [ 30.347034] ffff88800e75c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.348023] ffff88800e75c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.349024] >ffff88800e75c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.349998] ^ [ 30.350657] ffff88800e75c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.351610] ffff88800e75c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.352579] ================================================================== [ 30.353860] Disabling lock debugging due to kernel taint [ 32.575037] BUG: Bad rss-counter state mm:00000000c0d13dc1 type:MM_FILEPAGES val:33 [ 32.576551] BUG: Bad rss-counter state mm:00000000c0d13dc1 type:MM_ANONPAGES val:22 [ 33.026643] BUG: Bad rss-counter state mm:00000000a5ba5816 type:MM_FILEPAGES val:33 [ 33.027570] BUG: Bad rss-counter state mm:00000000a5ba5816 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53203' (ECDSA) to the list of known hosts. 2023/06/21 05:31:30 fuzzer started 2023/06/21 05:31:30 dialing manager at localhost:36067 2023/06/21 05:31:30 checking machine... 2023/06/21 05:31:30 checking revisions... [ 33.751746] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:31:30 testing simple program... [ 33.804156] cgroup: Unknown subsys name 'net' [ 33.843569] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:30 Registers: info registers vcpu 0 RAX=ffff88801a160000 RBX=ffffffff813ad470 RCX=ffff888015d97a38 RDX=0000000000000000 RSI=ffff88801a160000 RDI=ffffffff813ad470 RBP=ffff888015d97a38 RSP=ffff888015d979a0 R8 =0000000000000001 R9 =ffff88800f67433c R10=ffff88800f6742f3 R11=00000000000b6a61 R12=ffff888015d97a68 R13=0000000000000000 R14=ffff88801a160000 R15=ffff88800f674260 RIP=ffffffff810bd027 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3b43f29900 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=00007f3b444de650 CR3=000000000ea24000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=1ffffffff0c9776b RDI=ffffffff86055348 RBP=ffff888015d97af8 RSP=ffff888015d97a30 R8 =ffffffff864bbb4e R9 =ffff888015d97ae0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888015d97b00 R13=ffff888015d97ae8 R14=ffff888015d97ae1 R15=ffff888015d97aa0 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f3b43f29900 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=00007f3b444e10b0 CR3=000000000ea24000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000