syzkaller login: [ 36.315037] BUG: Bad rss-counter state mm:0000000018449dee type:MM_FILEPAGES val:33 [ 36.316350] BUG: Bad rss-counter state mm:0000000018449dee type:MM_ANONPAGES val:22 [ 36.495115] ================================================================== [ 36.495739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.496348] Read of size 8 at addr ffff88800e0cf3f8 by task sshd/223 [ 36.500877] [ 36.501023] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.501805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.502427] Call Trace: [ 36.502634] [ 36.502838] dump_stack_lvl+0x91/0xf0 [ 36.503170] print_report+0xcc/0x620 [ 36.503490] ? __virt_addr_valid+0x102/0x340 [ 36.503850] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.504254] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.504655] kasan_report+0xbe/0xf0 [ 36.504994] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.505396] vma_interval_tree_remove+0xc75/0xec0 [ 36.505785] vma_prepare+0xc54/0x11a0 [ 36.506101] __split_vma+0x5af/0x950 [ 36.506413] ? __pfx___split_vma+0x10/0x10 [ 36.506760] ? find_held_lock+0x2c/0x110 [ 36.507100] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.507471] ? lock_is_held_type+0x9f/0x120 [ 36.507851] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.508240] ? mtree_range_walk+0x632/0x900 [ 36.508596] ? mas_walk+0x5c7/0x7c0 [ 36.512974] do_vmi_munmap+0x1f1/0x2b0 [ 36.513302] mmap_region+0x1f9/0x2660 [ 36.513618] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.513952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.514417] ? __pfx_lock_acquire+0x10/0x10 [ 36.514765] ? __pfx_mmap_region+0x10/0x10 [ 36.515107] ? security_mmap_addr+0x7d/0xa0 [ 36.515454] ? get_unmapped_area+0x1f5/0x3f0 [ 36.515841] do_mmap+0x854/0xf00 [ 36.516127] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.516448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.520828] ksys_mmap_pgoff+0x3af/0x500 [ 36.521164] do_syscall_64+0x3f/0x90 [ 36.521479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.521930] RIP: 0033:0x7fb82d47ad82 [ 36.522229] 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 [ 36.523624] RSP: 002b:00007ffc14064418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.524208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb82d47ad82 [ 36.528776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb82c8b4000 [ 36.529316] RBP: 00007fb82c8b4000 R08: 0000000000000009 R09: 0000000000001000 [ 36.529848] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcf9811f70 [ 36.530370] R13: 00007ffc14064430 R14: 00007ffc14064460 R15: 00007ffc140647c0 [ 36.530876] [ 36.531050] [ 36.531180] Allocated by task 215: [ 36.531438] kasan_save_stack+0x22/0x50 [ 36.531742] kasan_set_track+0x25/0x30 [ 36.532039] __kasan_slab_alloc+0x59/0x70 [ 36.532354] kmem_cache_alloc+0x16b/0x370 [ 36.532663] vm_area_dup+0x20/0x160 [ 36.532977] __split_vma+0x170/0x950 [ 36.533274] split_vma+0xc6/0x110 [ 36.533537] mprotect_fixup+0x8d2/0xb30 [ 36.533839] do_mprotect_pkey+0x87e/0xd40 [ 36.534150] __x64_sys_mprotect+0x78/0xc0 [ 36.534459] do_syscall_64+0x3f/0x90 [ 36.534741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.535127] [ 36.535255] Freed by task 206: [ 36.535488] kasan_save_stack+0x22/0x50 [ 36.535789] kasan_set_track+0x25/0x30 [ 36.536080] kasan_save_free_info+0x2b/0x50 [ 36.536389] __kasan_slab_free+0x10a/0x190 [ 36.536697] kmem_cache_free+0x10d/0x4d0 [ 36.545067] rcu_core+0x8c8/0x2860 [ 36.545345] __do_softirq+0x1b7/0x7d4 [ 36.545628] [ 36.545758] Last potentially related work creation: [ 36.546103] kasan_save_stack+0x22/0x50 [ 36.546399] __kasan_record_aux_stack+0x8e/0xa0 [ 36.546740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.547127] remove_vma+0x139/0x170 [ 36.547396] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.547724] do_vmi_munmap+0x1f1/0x2b0 [ 36.548015] __vm_munmap+0x138/0x3a0 [ 36.548292] __x64_sys_munmap+0x59/0x80 [ 36.548587] do_syscall_64+0x3f/0x90 [ 36.552950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.553339] [ 36.553468] The buggy address belongs to the object at ffff88800e0cf3a0 [ 36.553468] which belongs to the cache vm_area_struct of size 168 [ 36.554329] The buggy address is located 88 bytes inside of [ 36.554329] freed 168-byte region [ffff88800e0cf3a0, ffff88800e0cf448) [ 36.555154] [ 36.555282] The buggy address belongs to the physical page: [ 36.555667] page:00000000a1343e4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0cf [ 36.556315] memcg:ffff88800e2bad01 [ 36.556564] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.557012] page_type: 0xffffffff() [ 36.557277] raw: 0100000000000200 ffff88800879fc80 ffffea0000384040 dead000000000005 [ 36.557818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2bad01 [ 36.558347] page dumped because: kasan: bad access detected [ 36.558738] [ 36.558867] Memory state around the buggy address: [ 36.559214] ffff88800e0cf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.559723] ffff88800e0cf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.560228] >ffff88800e0cf380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.560728] ^ [ 36.564978] ffff88800e0cf400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.565480] ffff88800e0cf480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.565974] ================================================================== [ 36.566659] Disabling lock debugging due to kernel taint [ 39.138920] BUG: Bad rss-counter state mm:00000000bc7d1376 type:MM_FILEPAGES val:33 [ 39.139922] BUG: Bad rss-counter state mm:00000000bc7d1376 type:MM_ANONPAGES val:22 [ 39.948151] BUG: Bad rss-counter state mm:00000000bd84ba37 type:MM_FILEPAGES val:33 [ 39.950905] BUG: Bad rss-counter state mm:00000000bd84ba37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59885' (ECDSA) to the list of known hosts. 2023/06/20 08:07:12 fuzzer started 2023/06/20 08:07:12 dialing manager at localhost:44161 2023/06/20 08:07:12 checking machine... 2023/06/20 08:07:12 checking revisions... [ 40.956962] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:07:12 testing simple program... [ 41.003266] cgroup: Unknown subsys name 'net' [ 41.061078] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:07:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fea8c00 RCX=ffffffff83a301a0 RDX=ffffffff83a31480 RSI=ffffffff83a35240 RDI=ffff88800fea8c00 RBP=ffffffff83a301a0 RSP=ffff88806ce09310 R8 =0000000000000003 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=ffffffff83a31480 R13=ffffffff83a35240 R14=ffff88800e6d860c R15=00000000fffc0682 RIP=ffffffff814c07e4 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 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=00007fd4e4973328 CR3=0000000005482000 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=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=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=ffffed1003265961 RSI=0000000000000004 RDI=ffff88801932cb00 RBP=ffff88801932cb00 RSP=ffff888019fef580 R8 =0000000000000000 R9 =ffffed1003265960 R10=ffff88801932cb03 R11=00000000000b6996 R12=0000000000000003 R13=ffffed1003265960 R14=0000000000000001 R15=1ffff110033fdeb1 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 00007f1e656fb900 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=00007ffef920ee58 CR3=0000000015832000 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=00007fb2079f55100000562b969c6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000