syzkaller login: [ 38.789771] BUG: Bad rss-counter state mm:00000000fab07577 type:MM_FILEPAGES val:33 [ 38.791318] BUG: Bad rss-counter state mm:00000000fab07577 type:MM_ANONPAGES val:22 [ 38.945755] ================================================================== [ 38.946661] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.947823] Read of size 8 at addr ffff888019fbf968 by task sshd/218 [ 38.948604] [ 38.948816] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.949680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.950674] Call Trace: [ 38.950991] [ 38.951279] dump_stack_lvl+0x91/0xf0 [ 38.951762] print_report+0xcc/0x620 [ 38.952245] ? __virt_addr_valid+0x102/0x340 [ 38.952805] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.953420] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954037] kasan_report+0xbe/0xf0 [ 38.954519] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955151] vma_interval_tree_remove+0xc75/0xec0 [ 38.955771] vma_prepare+0xc54/0x11a0 [ 38.956250] __split_vma+0x5af/0x950 [ 38.956750] ? __pfx___split_vma+0x10/0x10 [ 38.957301] ? find_held_lock+0x2c/0x110 [ 38.957821] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.958380] ? lock_is_held_type+0x9f/0x120 [ 38.958925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.959537] ? mtree_range_walk+0x632/0x900 [ 38.960105] ? mas_walk+0x5c7/0x7c0 [ 38.960596] do_vmi_munmap+0x1f1/0x2b0 [ 38.961096] mmap_region+0x1f9/0x2660 [ 38.961585] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.962109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.962833] ? __pfx_lock_acquire+0x10/0x10 [ 38.963376] ? __pfx_mmap_region+0x10/0x10 [ 38.963907] ? security_mmap_addr+0x7d/0xa0 [ 38.964452] ? get_unmapped_area+0x1f5/0x3f0 [ 38.965013] do_mmap+0x854/0xf00 [ 38.965460] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.965974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.966556] ksys_mmap_pgoff+0x3af/0x500 [ 38.967064] do_syscall_64+0x3f/0x90 [ 38.967551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968204] RIP: 0033:0x7f905f11dd82 [ 38.968692] 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 [ 38.970869] RSP: 002b:00007ffd60c4e178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.971785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f905f11dd82 [ 38.972659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f905e557000 [ 38.973508] RBP: 00007f905e557000 R08: 0000000000000009 R09: 0000000000001000 [ 38.974375] R10: 0000000000000812 R11: 0000000000000206 R12: 000056130030cec0 [ 38.975226] R13: 00007ffd60c4e190 R14: 00007ffd60c4e1c0 R15: 00007ffd60c4e520 [ 38.976105] [ 38.976424] [ 38.976639] Allocated by task 211: [ 38.977071] kasan_save_stack+0x22/0x50 [ 38.977576] kasan_set_track+0x25/0x30 [ 38.978079] __kasan_slab_alloc+0x59/0x70 [ 38.978609] kmem_cache_alloc+0x16b/0x370 [ 38.979131] vm_area_dup+0x20/0x160 [ 38.979591] __split_vma+0x170/0x950 [ 38.980064] split_vma+0xc6/0x110 [ 38.980520] mprotect_fixup+0x8d2/0xb30 [ 38.981026] do_mprotect_pkey+0x87e/0xd40 [ 38.981553] __x64_sys_mprotect+0x78/0xc0 [ 38.982081] do_syscall_64+0x3f/0x90 [ 38.982560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.983212] [ 38.983428] Freed by task 19: [ 38.983821] kasan_save_stack+0x22/0x50 [ 38.984352] kasan_set_track+0x25/0x30 [ 38.984844] kasan_save_free_info+0x2b/0x50 [ 38.985387] __kasan_slab_free+0x10a/0x190 [ 38.985920] kmem_cache_free+0x10d/0x4d0 [ 38.986434] rcu_core+0x8c8/0x2860 [ 38.986886] __do_softirq+0x1b7/0x7d4 [ 38.987369] [ 38.987586] Last potentially related work creation: [ 38.988182] kasan_save_stack+0x22/0x50 [ 38.988696] __kasan_record_aux_stack+0x8e/0xa0 [ 38.989280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.989927] remove_vma+0x139/0x170 [ 38.990389] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.990943] do_vmi_munmap+0x1f1/0x2b0 [ 38.991428] __vm_munmap+0x138/0x3a0 [ 38.991894] __x64_sys_munmap+0x59/0x80 [ 38.992411] do_syscall_64+0x3f/0x90 [ 38.992889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.993534] [ 38.993753] The buggy address belongs to the object at ffff888019fbf910 [ 38.993753] which belongs to the cache vm_area_struct of size 168 [ 38.995235] The buggy address is located 88 bytes inside of [ 38.995235] freed 168-byte region [ffff888019fbf910, ffff888019fbf9b8) [ 38.996649] [ 38.996866] The buggy address belongs to the physical page: [ 38.997528] page:000000006579652c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fbf [ 38.998626] memcg:ffff88800fdd3b01 [ 38.999055] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.999708] page_type: 0xffffffff() [ 39.000159] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.001089] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdd3b01 [ 39.001993] page dumped because: kasan: bad access detected [ 39.002657] [ 39.002879] Memory state around the buggy address: [ 39.003458] ffff888019fbf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.004320] ffff888019fbf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.005203] >ffff888019fbf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.006055] ^ [ 39.006836] ffff888019fbf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.007696] ffff888019fbfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.008555] ================================================================== [ 39.009724] Disabling lock debugging due to kernel taint [ 41.207226] BUG: Bad rss-counter state mm:00000000b6488a82 type:MM_FILEPAGES val:33 [ 41.208107] BUG: Bad rss-counter state mm:00000000b6488a82 type:MM_ANONPAGES val:22 [ 41.633997] BUG: Bad rss-counter state mm:00000000f6e8641c type:MM_FILEPAGES val:33 [ 41.634761] BUG: Bad rss-counter state mm:00000000f6e8641c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17970' (ECDSA) to the list of known hosts. 2023/06/20 20:31:22 fuzzer started 2023/06/20 20:31:23 dialing manager at localhost:36067 2023/06/20 20:31:23 checking machine... 2023/06/20 20:31:23 checking revisions... [ 42.318665] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:31:23 testing simple program... [ 42.382624] cgroup: Unknown subsys name 'net' [ 42.456093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:31:22 Registers: info registers vcpu 0 RAX=ffffffff8117fddb RBX=ffffffff85d98384 RCX=ffffffff8117fdd8 RDX=0000000000000000 RSI=ffffffff860a039c RDI=ffffffff85d9837c RBP=ffffffff85d9837c RSP=ffff88806ce09990 R8 =ffffffff860a039c R9 =ffff88806ce09a88 R10=0000000000038001 R11=000000000000766e R12=ffffffff85d98380 R13=ffffffff85d9837c R14=ffffffff85d9837c R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--S-A-C] 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 00007fcff3a05900 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=0000563a02ee3818 CR3=0000000013a34000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=858e458354ea5cc400000000000ae988 XMM05=7a37e531dd70126f0000000000132eb8 XMM06=806171799158d9670000000000131be8 XMM07=fb795ef6d65770560000000000122140 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffd4e809a40 RBX=00000000000000e1 RCX=00007ffd4e809a80 RDX=000000000000231c RSI=0000000000000000 RDI=00007ffd4e809a40 RBP=00000000000000f4 RSP=fffffe0000049fd0 R8 =00007ffd4e80e0e4 R9 =00007ffd4e80dfa0 R10=00007fba26456a57 R11=0000000000000000 R12=0000000000000008 R13=00007ffd4e809a40 R14=00007ffd4e80e210 R15=0000000000000452 RIP=ffffffff84601260 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fba25906900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd4e80bd3c CR3=000000000e7e6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000