syzkaller login: [ 30.930018] BUG: Bad rss-counter state mm:00000000eb29ee41 type:MM_FILEPAGES val:33 [ 30.931226] BUG: Bad rss-counter state mm:00000000eb29ee41 type:MM_ANONPAGES val:22 [ 30.971128] ================================================================== [ 30.972307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.973297] Read of size 8 at addr ffff88800fbe5310 by task sshd/219 [ 30.974376] [ 30.974640] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.975643] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.976835] Call Trace: [ 30.977269] [ 30.977583] dump_stack_lvl+0x91/0xf0 [ 30.978104] print_report+0xcc/0x620 [ 30.978667] ? __virt_addr_valid+0x102/0x340 [ 30.979380] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980161] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980810] kasan_report+0xbe/0xf0 [ 30.981324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.981985] vma_interval_tree_remove+0xc75/0xec0 [ 30.982634] vma_prepare+0xc54/0x11a0 [ 30.983159] __split_vma+0x5af/0x950 [ 30.983681] ? __pfx___split_vma+0x10/0x10 [ 30.984286] ? find_held_lock+0x2c/0x110 [ 30.984861] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.985484] ? lock_is_held_type+0x9f/0x120 [ 30.986126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.986806] ? mtree_range_walk+0x632/0x900 [ 30.987422] ? mas_walk+0x5c7/0x7c0 [ 30.987944] do_vmi_munmap+0x1f1/0x2b0 [ 30.988504] mmap_region+0x1f9/0x2660 [ 30.989032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.989598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.990385] ? __pfx_lock_acquire+0x10/0x10 [ 30.990973] ? __pfx_mmap_region+0x10/0x10 [ 30.991554] ? security_mmap_addr+0x7d/0xa0 [ 30.992157] ? get_unmapped_area+0x1f5/0x3f0 [ 30.992771] do_mmap+0x854/0xf00 [ 30.993256] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.993803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.994423] ksys_mmap_pgoff+0x3af/0x500 [ 30.994981] do_syscall_64+0x3f/0x90 [ 30.995507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.996229] RIP: 0033:0x7f20331fad82 [ 30.996731] 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 [ 30.999073] RSP: 002b:00007ffd2d0ce568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.000126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20331fad82 [ 31.001068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2032634000 [ 31.002000] RBP: 00007f2032634000 R08: 0000000000000009 R09: 0000000000001000 [ 31.002935] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c34750dec0 [ 31.003873] R13: 00007ffd2d0ce580 R14: 00007ffd2d0ce5b0 R15: 00007ffd2d0ce910 [ 31.004828] [ 31.005151] [ 31.005395] Allocated by task 212: [ 31.005899] kasan_save_stack+0x22/0x50 [ 31.006454] kasan_set_track+0x25/0x30 [ 31.006992] __kasan_slab_alloc+0x59/0x70 [ 31.007575] kmem_cache_alloc+0x16b/0x370 [ 31.008165] vm_area_dup+0x20/0x160 [ 31.008667] __split_vma+0x170/0x950 [ 31.009182] split_vma+0xc6/0x110 [ 31.009668] mprotect_fixup+0x8d2/0xb30 [ 31.010224] do_mprotect_pkey+0x87e/0xd40 [ 31.010800] __x64_sys_mprotect+0x78/0xc0 [ 31.011366] do_syscall_64+0x3f/0x90 [ 31.011888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.012607] [ 31.012841] Freed by task 212: [ 31.013274] kasan_save_stack+0x22/0x50 [ 31.013828] kasan_set_track+0x25/0x30 [ 31.014373] kasan_save_free_info+0x2b/0x50 [ 31.014958] __kasan_slab_free+0x10a/0x190 [ 31.015547] kmem_cache_free+0x10d/0x4d0 [ 31.016183] rcu_core+0x8c8/0x2860 [ 31.016677] __do_softirq+0x1b7/0x7d4 [ 31.017207] [ 31.017443] Last potentially related work creation: [ 31.018087] kasan_save_stack+0x22/0x50 [ 31.018647] __kasan_record_aux_stack+0x8e/0xa0 [ 31.019284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.020002] remove_vma+0x139/0x170 [ 31.020505] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.021123] do_vmi_munmap+0x1f1/0x2b0 [ 31.021659] __vm_munmap+0x138/0x3a0 [ 31.022175] __x64_sys_munmap+0x59/0x80 [ 31.022716] do_syscall_64+0x3f/0x90 [ 31.023236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.023950] [ 31.024193] The buggy address belongs to the object at ffff88800fbe52b8 [ 31.024193] which belongs to the cache vm_area_struct of size 168 [ 31.025813] The buggy address is located 88 bytes inside of [ 31.025813] freed 168-byte region [ffff88800fbe52b8, ffff88800fbe5360) [ 31.027359] [ 31.027596] The buggy address belongs to the physical page: [ 31.028341] page:0000000004bf1c73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbe5 [ 31.029538] memcg:ffff88800fbe6001 [ 31.030015] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.030732] page_type: 0xffffffff() [ 31.031231] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.032255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbe6001 [ 31.033251] page dumped because: kasan: bad access detected [ 31.033990] [ 31.034228] Memory state around the buggy address: [ 31.034865] ffff88800fbe5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.035820] ffff88800fbe5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.036771] >ffff88800fbe5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.037715] ^ [ 31.038235] ffff88800fbe5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.039182] ffff88800fbe5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.040146] ================================================================== [ 31.041319] Disabling lock debugging due to kernel taint [ 32.922063] BUG: Bad rss-counter state mm:00000000de31a7e7 type:MM_FILEPAGES val:33 [ 32.923017] BUG: Bad rss-counter state mm:00000000de31a7e7 type:MM_ANONPAGES val:22 [ 33.485603] BUG: Bad rss-counter state mm:00000000bff4d0b3 type:MM_FILEPAGES val:33 [ 33.486835] BUG: Bad rss-counter state mm:00000000bff4d0b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21698' (ECDSA) to the list of known hosts. 2023/06/20 20:23:57 fuzzer started 2023/06/20 20:23:57 dialing manager at localhost:36067 2023/06/20 20:23:57 checking machine... 2023/06/20 20:23:57 checking revisions... [ 34.137284] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:23:57 testing simple program... [ 34.176193] cgroup: Unknown subsys name 'net' [ 34.228448] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:23:57 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff8542a6c0 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff888013985670 RIP=ffffffff813745aa 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 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=00007f5b596bd790 CR3=0000000008ebe000 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=4040fa5d1548c3bae541567273068702 XMM02=000000000011ad88ec2efd57dc4c00df XMM03=00000000001226d0466d3c118281938a XMM04=14cf3387a4091c4400000000000ae988 XMM05=f4cc3fee7644777100000000001332e0 XMM06=806171799158d9670000000000132380 XMM07=e042d86d42eb936e0000000000122950 XMM08=466d3c118281938a000000000011ade8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff11001ec1eeb RSI=0000000000000000 RDI=ffff88800f60f758 RBP=00007ffea7ceabe0 RSP=ffff88800f60f698 R8 =ffffffff864bbb58 R9 =ffff88800f60f748 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800f60ff58 R13=ffff88800f60f750 R14=ffff88800f60ff58 R15=ffff88800f60f708 RIP=ffffffff8113125c 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 00007f2ae20ff900 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=00007f2ae26b6618 CR3=000000001801e000 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