syzkaller login: [ 29.856032] BUG: Bad rss-counter state mm:000000009f29e9a5 type:MM_FILEPAGES val:33 [ 29.856741] BUG: Bad rss-counter state mm:000000009f29e9a5 type:MM_ANONPAGES val:22 [ 29.977802] ================================================================== [ 29.978502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.979221] Read of size 8 at addr ffff88800c9b75c8 by task sshd/218 [ 29.979802] [ 29.979967] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.980619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.981481] Call Trace: [ 29.981723] [ 29.981940] dump_stack_lvl+0x91/0xf0 [ 29.982307] print_report+0xcc/0x620 [ 29.982674] ? __virt_addr_valid+0x102/0x340 [ 29.983089] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.983560] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.984029] kasan_report+0xbe/0xf0 [ 29.984386] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.984874] vma_interval_tree_remove+0xc75/0xec0 [ 29.985323] vma_prepare+0xc54/0x11a0 [ 29.985648] __split_vma+0x5af/0x950 [ 29.985973] ? __pfx___split_vma+0x10/0x10 [ 29.986337] ? find_held_lock+0x2c/0x110 [ 29.986694] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.987084] ? lock_is_held_type+0x9f/0x120 [ 29.987457] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.987870] ? mtree_range_walk+0x632/0x900 [ 29.988252] ? mas_walk+0x5c7/0x7c0 [ 29.988577] do_vmi_munmap+0x1f1/0x2b0 [ 29.988923] mmap_region+0x1f9/0x2660 [ 29.989250] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.989606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.990093] ? __pfx_lock_acquire+0x10/0x10 [ 29.990455] ? __pfx_mmap_region+0x10/0x10 [ 29.990817] ? security_mmap_addr+0x7d/0xa0 [ 29.991178] ? get_unmapped_area+0x1f5/0x3f0 [ 29.991553] do_mmap+0x854/0xf00 [ 29.991851] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.992188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.992580] ksys_mmap_pgoff+0x3af/0x500 [ 29.992937] do_syscall_64+0x3f/0x90 [ 29.993262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.993705] RIP: 0033:0x7fe4b7d3ad82 [ 29.994015] 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 [ 29.995483] RSP: 002b:00007ffd558b9778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.996102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe4b7d3ad82 [ 29.996680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe4b7174000 [ 29.997265] RBP: 00007fe4b7174000 R08: 0000000000000009 R09: 0000000000001000 [ 29.997846] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624a73d0ec0 [ 29.998425] R13: 00007ffd558b9790 R14: 00007ffd558b97c0 R15: 00007ffd558b9b20 [ 29.999011] [ 29.999212] [ 29.999359] Allocated by task 211: [ 29.999650] kasan_save_stack+0x22/0x50 [ 29.999994] kasan_set_track+0x25/0x30 [ 30.000332] __kasan_slab_alloc+0x59/0x70 [ 30.000698] kmem_cache_alloc+0x16b/0x370 [ 30.001055] vm_area_dup+0x20/0x160 [ 30.001365] __split_vma+0x170/0x950 [ 30.001682] split_vma+0xc6/0x110 [ 30.001982] mprotect_fixup+0x8d2/0xb30 [ 30.002322] do_mprotect_pkey+0x87e/0xd40 [ 30.002680] __x64_sys_mprotect+0x78/0xc0 [ 30.003037] do_syscall_64+0x3f/0x90 [ 30.003362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.003803] [ 30.003948] Freed by task 211: [ 30.004216] kasan_save_stack+0x22/0x50 [ 30.004560] kasan_set_track+0x25/0x30 [ 30.004911] kasan_save_free_info+0x2b/0x50 [ 30.005273] __kasan_slab_free+0x10a/0x190 [ 30.005635] kmem_cache_free+0x10d/0x4d0 [ 30.005982] rcu_core+0x8c8/0x2860 [ 30.006284] __do_softirq+0x1b7/0x7d4 [ 30.006614] [ 30.006760] Last potentially related work creation: [ 30.007159] kasan_save_stack+0x22/0x50 [ 30.007505] __kasan_record_aux_stack+0x8e/0xa0 [ 30.007897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.008335] remove_vma+0x139/0x170 [ 30.008642] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.009028] do_vmi_munmap+0x1f1/0x2b0 [ 30.009362] __vm_munmap+0x138/0x3a0 [ 30.009680] __x64_sys_munmap+0x59/0x80 [ 30.010018] do_syscall_64+0x3f/0x90 [ 30.010342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.010779] [ 30.010924] The buggy address belongs to the object at ffff88800c9b7570 [ 30.010924] which belongs to the cache vm_area_struct of size 168 [ 30.011936] The buggy address is located 88 bytes inside of [ 30.011936] freed 168-byte region [ffff88800c9b7570, ffff88800c9b7618) [ 30.012911] [ 30.013056] The buggy address belongs to the physical page: [ 30.013508] page:000000000bf33c2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9b7 [ 30.014249] memcg:ffff88800f066101 [ 30.014541] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.014985] page_type: 0xffffffff() [ 30.015296] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.015919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f066101 [ 30.016536] page dumped because: kasan: bad access detected [ 30.016992] [ 30.017139] Memory state around the buggy address: [ 30.017538] ffff88800c9b7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.018113] ffff88800c9b7500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.018695] >ffff88800c9b7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.019274] ^ [ 30.019732] ffff88800c9b7600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.020324] ffff88800c9b7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.020910] ================================================================== [ 30.021651] Disabling lock debugging due to kernel taint [ 32.007468] BUG: Bad rss-counter state mm:0000000090fa3e1e type:MM_FILEPAGES val:33 [ 32.008745] BUG: Bad rss-counter state mm:0000000090fa3e1e type:MM_ANONPAGES val:22 [ 32.536661] BUG: Bad rss-counter state mm:00000000df804399 type:MM_FILEPAGES val:33 [ 32.537841] BUG: Bad rss-counter state mm:00000000df804399 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55079' (ECDSA) to the list of known hosts. 2023/06/20 12:05:19 fuzzer started 2023/06/20 12:05:19 dialing manager at localhost:36067 2023/06/20 12:05:19 checking machine... 2023/06/20 12:05:19 checking revisions... [ 33.153969] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:05:20 testing simple program... [ 33.199703] cgroup: Unknown subsys name 'net' [ 33.237449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888015ee1b40 RSI=ffffffff8171ae3e RDI=ffff888015ee21d8 RBP=ffff88800fc0ff58 RSP=ffff88800fc0fed8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007f3059be03ec R14=0000000000000000 R15=ffff888016b73780 RIP=ffffffff8113b759 RFL=00000296 [--S-AP-] 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 00007f305906f900 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=00007f3059be03ec CR3=000000000fcea000 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=0000000000000002 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff860d2fe0 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09f80 R15=ffff88806cf09a70 RIP=ffffffff81130bc1 RFL=00000292 [--S-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 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=00007f1b1bd86df0 CR3=000000000d990000 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=2039313a35303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a35303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000