syzkaller login: [ 31.066234] BUG: Bad rss-counter state mm:00000000680dd8d0 type:MM_FILEPAGES val:33 [ 31.067501] BUG: Bad rss-counter state mm:00000000680dd8d0 type:MM_ANONPAGES val:22 [ 31.221399] ================================================================== [ 31.222486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.223694] Read of size 8 at addr ffff88800f2966b0 by task sshd/220 [ 31.224673] [ 31.224927] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.225774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.226750] Call Trace: [ 31.227066] [ 31.227347] dump_stack_lvl+0x91/0xf0 [ 31.227840] print_report+0xcc/0x620 [ 31.228321] ? __virt_addr_valid+0x102/0x340 [ 31.228865] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.229470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230077] kasan_report+0xbe/0xf0 [ 31.230548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231169] vma_interval_tree_remove+0xc75/0xec0 [ 31.231792] vma_prepare+0xc54/0x11a0 [ 31.232293] __split_vma+0x5af/0x950 [ 31.232786] ? __pfx___split_vma+0x10/0x10 [ 31.233325] ? find_held_lock+0x2c/0x110 [ 31.233867] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.234451] ? lock_is_held_type+0x9f/0x120 [ 31.234997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.235614] ? mtree_range_walk+0x632/0x900 [ 31.236202] ? mas_walk+0x5c7/0x7c0 [ 31.236700] do_vmi_munmap+0x1f1/0x2b0 [ 31.237216] mmap_region+0x1f9/0x2660 [ 31.237713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.238230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.238977] ? __pfx_lock_acquire+0x10/0x10 [ 31.239527] ? __pfx_mmap_region+0x10/0x10 [ 31.240093] ? security_mmap_addr+0x7d/0xa0 [ 31.240653] ? get_unmapped_area+0x1f5/0x3f0 [ 31.241224] do_mmap+0x854/0xf00 [ 31.241679] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.242190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.242770] ksys_mmap_pgoff+0x3af/0x500 [ 31.243284] do_syscall_64+0x3f/0x90 [ 31.243785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244453] RIP: 0033:0x7f6947065d82 [ 31.244918] 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 [ 31.247144] RSP: 002b:00007ffdc5742a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.248047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6947065d82 [ 31.248890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f694649f000 [ 31.249768] RBP: 00007f694649f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.250624] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4138a2ec0 [ 31.251451] R13: 00007ffdc5742a60 R14: 00007ffdc5742a90 R15: 00007ffdc5742df0 [ 31.252293] [ 31.252599] [ 31.252818] Allocated by task 213: [ 31.253261] kasan_save_stack+0x22/0x50 [ 31.253771] kasan_set_track+0x25/0x30 [ 31.254270] __kasan_slab_alloc+0x59/0x70 [ 31.254806] kmem_cache_alloc+0x16b/0x370 [ 31.255340] vm_area_dup+0x20/0x160 [ 31.255818] __split_vma+0x170/0x950 [ 31.256303] split_vma+0xc6/0x110 [ 31.256756] mprotect_fixup+0x8d2/0xb30 [ 31.257264] do_mprotect_pkey+0x87e/0xd40 [ 31.257757] __x64_sys_mprotect+0x78/0xc0 [ 31.258246] do_syscall_64+0x3f/0x90 [ 31.258700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259311] [ 31.259518] Freed by task 203: [ 31.259899] kasan_save_stack+0x22/0x50 [ 31.260374] kasan_set_track+0x25/0x30 [ 31.260841] kasan_save_free_info+0x2b/0x50 [ 31.261344] __kasan_slab_free+0x10a/0x190 [ 31.261852] kmem_cache_free+0x10d/0x4d0 [ 31.262335] rcu_core+0x8c8/0x2860 [ 31.262756] __do_softirq+0x1b7/0x7d4 [ 31.263207] [ 31.263415] Last potentially related work creation: [ 31.263968] kasan_save_stack+0x22/0x50 [ 31.264468] __kasan_record_aux_stack+0x8e/0xa0 [ 31.265060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.265809] remove_vma+0x139/0x170 [ 31.266254] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.266802] do_vmi_munmap+0x1f1/0x2b0 [ 31.267292] __vm_munmap+0x138/0x3a0 [ 31.267753] __x64_sys_munmap+0x59/0x80 [ 31.268252] do_syscall_64+0x3f/0x90 [ 31.268739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269407] [ 31.269629] The buggy address belongs to the object at ffff88800f296658 [ 31.269629] which belongs to the cache vm_area_struct of size 168 [ 31.271111] The buggy address is located 88 bytes inside of [ 31.271111] freed 168-byte region [ffff88800f296658, ffff88800f296700) [ 31.272571] [ 31.272791] The buggy address belongs to the physical page: [ 31.273468] page:00000000535a7bfb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf296 [ 31.274579] memcg:ffff88801aa0e101 [ 31.275007] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.275679] page_type: 0xffffffff() [ 31.276163] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.277095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aa0e101 [ 31.277985] page dumped because: kasan: bad access detected [ 31.278674] [ 31.278888] Memory state around the buggy address: [ 31.279488] ffff88800f296580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.280365] ffff88800f296600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.281232] >ffff88800f296680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.282086] ^ [ 31.282667] ffff88800f296700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.283515] ffff88800f296780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.284383] ================================================================== [ 31.285360] Disabling lock debugging due to kernel taint [ 33.583242] BUG: Bad rss-counter state mm:000000001743cda6 type:MM_FILEPAGES val:33 [ 33.584252] BUG: Bad rss-counter state mm:000000001743cda6 type:MM_ANONPAGES val:22 [ 34.076579] BUG: Bad rss-counter state mm:000000004a4e1b61 type:MM_FILEPAGES val:33 [ 34.077840] BUG: Bad rss-counter state mm:000000004a4e1b61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41475' (ECDSA) to the list of known hosts. 2023/06/20 15:05:16 fuzzer started 2023/06/20 15:05:16 dialing manager at localhost:36067 2023/06/20 15:05:16 checking machine... 2023/06/20 15:05:16 checking revisions... [ 34.765259] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:05:17 testing simple program... [ 34.814177] cgroup: Unknown subsys name 'net' [ 34.865480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:05:16 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=00007f9f14d69000 RCX=ffffffff81007b82 RDX=ffff88800d9451c0 RSI=0000000000000100 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88806ce09a18 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f9f14d69000 R11=00000000000b6a61 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800d9451c0 R15=ffff888015fb2958 RIP=ffffffff814c086b RFL=00000207 [-----PC] 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 00007f9f14887900 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=00007f9f14e3f0b0 CR3=000000001ab22000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b417e RDX=1ffff11002b84e70 RSI=1ffff11002b84e6f RDI=1ffff11002b84e6f RBP=ffff888015c27378 RSP=ffff888015c272b0 R8 =ffffffff863b4182 R9 =ffff888015c27360 R10=0000000000038001 R11=000000000008ab69 R12=ffff888015c27380 R13=ffff888015c27368 R14=ffff888015c27e10 R15=ffff888015c27320 RIP=ffffffff811310ce 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 00007fbfbe519900 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=00007fbfbda37000 CR3=0000000009762000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1e63068f5b2ce9ac00000000000ae988 XMM05=3b9b6ca57a7d89c20000000000132ea8 XMM06=8943796f0c45072a0000000000131c48 XMM07=fb795ef6d65770560000000000121f40 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000