syzkaller login: [ 31.437940] BUG: Bad rss-counter state mm:000000004604a484 type:MM_FILEPAGES val:33 [ 31.439309] BUG: Bad rss-counter state mm:000000004604a484 type:MM_ANONPAGES val:22 [ 31.489455] ================================================================== [ 31.490463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.491516] Read of size 8 at addr ffff8880180c6798 by task sshd/221 [ 31.492365] [ 31.492602] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.493559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.494636] Call Trace: [ 31.494994] [ 31.495320] dump_stack_lvl+0x91/0xf0 [ 31.495875] print_report+0xcc/0x620 [ 31.496406] ? __virt_addr_valid+0x102/0x340 [ 31.497022] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.497715] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.498403] kasan_report+0xbe/0xf0 [ 31.498943] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.499847] vma_interval_tree_remove+0xc75/0xec0 [ 31.500525] vma_prepare+0xc54/0x11a0 [ 31.501061] __split_vma+0x5af/0x950 [ 31.501587] ? __pfx___split_vma+0x10/0x10 [ 31.502202] ? find_held_lock+0x2c/0x110 [ 31.502779] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.503413] ? lock_is_held_type+0x9f/0x120 [ 31.504011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.504687] ? mtree_range_walk+0x632/0x900 [ 31.505302] ? mas_walk+0x5c7/0x7c0 [ 31.505831] do_vmi_munmap+0x1f1/0x2b0 [ 31.506376] mmap_region+0x1f9/0x2660 [ 31.506914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.507496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.508291] ? __pfx_lock_acquire+0x10/0x10 [ 31.508882] ? __pfx_mmap_region+0x10/0x10 [ 31.509470] ? security_mmap_addr+0x7d/0xa0 [ 31.510061] ? get_unmapped_area+0x1f5/0x3f0 [ 31.510673] do_mmap+0x854/0xf00 [ 31.511168] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.511723] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.512345] ksys_mmap_pgoff+0x3af/0x500 [ 31.512907] do_syscall_64+0x3f/0x90 [ 31.513435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.514154] RIP: 0033:0x7fc669d44d82 [ 31.514666] 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 [ 31.517043] RSP: 002b:00007ffee9aed468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.518053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc669d44d82 [ 31.518995] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc66917e000 [ 31.519938] RBP: 00007fc66917e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.520875] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c162720d90 [ 31.521818] R13: 00007ffee9aed480 R14: 00007ffee9aed4b0 R15: 00007ffee9aed810 [ 31.522775] [ 31.523120] [ 31.523362] Allocated by task 214: [ 31.523837] kasan_save_stack+0x22/0x50 [ 31.524398] kasan_set_track+0x25/0x30 [ 31.524951] __kasan_slab_alloc+0x59/0x70 [ 31.525534] kmem_cache_alloc+0x16b/0x370 [ 31.526107] vm_area_dup+0x20/0x160 [ 31.526613] __split_vma+0x170/0x950 [ 31.527137] split_vma+0xc6/0x110 [ 31.527626] mprotect_fixup+0x8d2/0xb30 [ 31.528184] do_mprotect_pkey+0x87e/0xd40 [ 31.528761] __x64_sys_mprotect+0x78/0xc0 [ 31.529343] do_syscall_64+0x3f/0x90 [ 31.529868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.530578] [ 31.530814] Freed by task 214: [ 31.531260] kasan_save_stack+0x22/0x50 [ 31.531816] kasan_set_track+0x25/0x30 [ 31.532363] kasan_save_free_info+0x2b/0x50 [ 31.532956] __kasan_slab_free+0x10a/0x190 [ 31.533550] kmem_cache_free+0x10d/0x4d0 [ 31.534110] rcu_core+0x8c8/0x2860 [ 31.534602] __do_softirq+0x1b7/0x7d4 [ 31.535152] [ 31.535395] Last potentially related work creation: [ 31.536053] kasan_save_stack+0x22/0x50 [ 31.536610] __kasan_record_aux_stack+0x8e/0xa0 [ 31.537247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.537968] remove_vma+0x139/0x170 [ 31.538469] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.539094] do_vmi_munmap+0x1f1/0x2b0 [ 31.539648] __vm_munmap+0x138/0x3a0 [ 31.540170] __x64_sys_munmap+0x59/0x80 [ 31.540725] do_syscall_64+0x3f/0x90 [ 31.541336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.542060] [ 31.542302] The buggy address belongs to the object at ffff8880180c6740 [ 31.542302] which belongs to the cache vm_area_struct of size 168 [ 31.543954] The buggy address is located 88 bytes inside of [ 31.543954] freed 168-byte region [ffff8880180c6740, ffff8880180c67e8) [ 31.545511] [ 31.545755] The buggy address belongs to the physical page: [ 31.546487] page:0000000027dc1814 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180c6 [ 31.547703] memcg:ffff88800f404e01 [ 31.548175] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.548899] page_type: 0xffffffff() [ 31.549399] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.550420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f404e01 [ 31.551444] page dumped because: kasan: bad access detected [ 31.552181] [ 31.552421] Memory state around the buggy address: [ 31.553068] ffff8880180c6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.554016] ffff8880180c6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.554972] >ffff8880180c6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.555929] ^ [ 31.556477] ffff8880180c6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.557430] ffff8880180c6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.558380] ================================================================== [ 31.559589] Disabling lock debugging due to kernel taint [ 33.609300] BUG: Bad rss-counter state mm:00000000ca29f3d5 type:MM_FILEPAGES val:33 [ 33.610459] BUG: Bad rss-counter state mm:00000000ca29f3d5 type:MM_ANONPAGES val:22 [ 33.996796] BUG: Bad rss-counter state mm:000000001d5b9a3f type:MM_FILEPAGES val:33 [ 33.997961] BUG: Bad rss-counter state mm:000000001d5b9a3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34020' (ECDSA) to the list of known hosts. 2023/06/20 05:24:43 fuzzer started 2023/06/20 05:24:43 dialing manager at localhost:44161 2023/06/20 05:24:43 checking machine... 2023/06/20 05:24:43 checking revisions... [ 34.749847] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:24:43 testing simple program... [ 34.802706] cgroup: Unknown subsys name 'net' [ 34.874583] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:24:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801659f940 RCX=0000000000000001 RDX=1ffff11002cb3f3b RSI=ffffffff81808777 RDI=ffff88801659f94c RBP=ffff88801659f9d8 RSP=ffff88801659f858 R8 =0000000000000001 R9 =ffff88801659f8b8 R10=0000000000038001 R11=0000000000021edf R12=ffff88801659f940 R13=0000000000000000 R14=ffff888019d8d1c0 R15=0000000000092cc0 RIP=ffffffff813ad4f7 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 00007fa6bf82b900 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=00007fa6bfde2618 CR3=000000000e38c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f27108a0cc0 CR3=000000000d8c4000 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=fe75ab378ad41c8ba245f2382167d1fa XMM02=ec2efd57dc4c00df000000000011f9d0 XMM03=bb4ee77ffa7c31be000000000011faa0 XMM04=a4df94b776488c8900000000000ae988 XMM05=8559c738638402050000000000134720 XMM06=c291bd5c70af25b90000000000133b48 XMM07=e042d86d42eb936e0000000000124388 XMM08=bb4ee77ffa7c31be000000000011faa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000