syzkaller login: [ 69.665992] BUG: Bad rss-counter state mm:00000000af864434 type:MM_FILEPAGES val:33 [ 69.667244] BUG: Bad rss-counter state mm:00000000af864434 type:MM_ANONPAGES val:22 [ 69.706856] ================================================================== [ 69.707783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.708721] Read of size 8 at addr ffff888016d9ac20 by task sshd/222 [ 69.709505] [ 69.709724] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.710761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.711740] Call Trace: [ 69.712061] [ 69.712350] dump_stack_lvl+0x91/0xf0 [ 69.712850] print_report+0xcc/0x620 [ 69.713332] ? __virt_addr_valid+0x102/0x340 [ 69.713922] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.714545] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.715164] kasan_report+0xbe/0xf0 [ 69.715645] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.716282] vma_interval_tree_remove+0xc75/0xec0 [ 69.716891] vma_prepare+0xc54/0x11a0 [ 69.717369] __split_vma+0x5af/0x950 [ 69.717852] ? __pfx___split_vma+0x10/0x10 [ 69.718382] ? find_held_lock+0x2c/0x110 [ 69.718898] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.719466] ? lock_is_held_type+0x9f/0x120 [ 69.720007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.720614] ? mtree_range_walk+0x632/0x900 [ 69.721167] ? mas_walk+0x5c7/0x7c0 [ 69.721660] do_vmi_munmap+0x1f1/0x2b0 [ 69.722145] mmap_region+0x1f9/0x2660 [ 69.722622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.723141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.723855] ? __pfx_lock_acquire+0x10/0x10 [ 69.724399] ? __pfx_mmap_region+0x10/0x10 [ 69.724944] ? security_mmap_addr+0x7d/0xa0 [ 69.725492] ? get_unmapped_area+0x1f5/0x3f0 [ 69.726046] do_mmap+0x854/0xf00 [ 69.726484] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.726987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.727556] ksys_mmap_pgoff+0x3af/0x500 [ 69.728069] do_syscall_64+0x3f/0x90 [ 69.728545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.729192] RIP: 0033:0x7fe007694d82 [ 69.729656] 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 [ 69.731797] RSP: 002b:00007ffecd18f8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.732703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe007694d82 [ 69.733560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe006ace000 [ 69.734580] RBP: 00007fe006ace000 R08: 0000000000000009 R09: 0000000000001000 [ 69.735423] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd61e25f70 [ 69.736301] R13: 00007ffecd18f8c0 R14: 00007ffecd18f8f0 R15: 00007ffecd18fc50 [ 69.737171] [ 69.737463] [ 69.737694] Allocated by task 215: [ 69.738125] kasan_save_stack+0x22/0x50 [ 69.738632] kasan_set_track+0x25/0x30 [ 69.739130] __kasan_slab_alloc+0x59/0x70 [ 69.739665] kmem_cache_alloc+0x16b/0x370 [ 69.740182] vm_area_dup+0x20/0x160 [ 69.740637] __split_vma+0x170/0x950 [ 69.741103] split_vma+0xc6/0x110 [ 69.741566] mprotect_fixup+0x8d2/0xb30 [ 69.742069] do_mprotect_pkey+0x87e/0xd40 [ 69.742600] __x64_sys_mprotect+0x78/0xc0 [ 69.743131] do_syscall_64+0x3f/0x90 [ 69.743608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.744246] [ 69.744464] Freed by task 215: [ 69.744857] kasan_save_stack+0x22/0x50 [ 69.745367] kasan_set_track+0x25/0x30 [ 69.745886] kasan_save_free_info+0x2b/0x50 [ 69.746423] __kasan_slab_free+0x10a/0x190 [ 69.746979] kmem_cache_free+0x10d/0x4d0 [ 69.747482] rcu_core+0x8c8/0x2860 [ 69.747934] __do_softirq+0x1b7/0x7d4 [ 69.748421] [ 69.748636] Last potentially related work creation: [ 69.749230] kasan_save_stack+0x22/0x50 [ 69.749751] __kasan_record_aux_stack+0x8e/0xa0 [ 69.750335] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.750987] remove_vma+0x139/0x170 [ 69.751445] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.752009] do_vmi_munmap+0x1f1/0x2b0 [ 69.752493] __vm_munmap+0x138/0x3a0 [ 69.752972] __x64_sys_munmap+0x59/0x80 [ 69.753473] do_syscall_64+0x3f/0x90 [ 69.753978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.754624] [ 69.754849] The buggy address belongs to the object at ffff888016d9abc8 [ 69.754849] which belongs to the cache vm_area_struct of size 168 [ 69.756327] The buggy address is located 88 bytes inside of [ 69.756327] freed 168-byte region [ffff888016d9abc8, ffff888016d9ac70) [ 69.757760] [ 69.757977] The buggy address belongs to the physical page: [ 69.758635] page:000000003b3fefc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d9a [ 69.759735] memcg:ffff888016d9b001 [ 69.760169] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 69.760871] page_type: 0xffffffff() [ 69.761319] raw: 0100000000000200 ffff88800879fc80 ffffea00003a3500 dead000000000003 [ 69.762270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d9b001 [ 69.763172] page dumped because: kasan: bad access detected [ 69.763841] [ 69.764057] Memory state around the buggy address: [ 69.764646] ffff888016d9ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.765531] ffff888016d9ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 69.766389] >ffff888016d9ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 69.767238] ^ [ 69.767779] ffff888016d9ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 69.768652] ffff888016d9ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 69.769516] ================================================================== [ 69.770632] Disabling lock debugging due to kernel taint [ 71.744852] BUG: Bad rss-counter state mm:00000000d9f7799e type:MM_FILEPAGES val:33 [ 71.745859] BUG: Bad rss-counter state mm:00000000d9f7799e type:MM_ANONPAGES val:22 [ 72.146265] BUG: Bad rss-counter state mm:0000000061e30c17 type:MM_FILEPAGES val:33 [ 72.147911] BUG: Bad rss-counter state mm:0000000061e30c17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38367' (ECDSA) to the list of known hosts. 2023/06/20 05:49:43 fuzzer started 2023/06/20 05:49:43 dialing manager at localhost:44161 2023/06/20 05:49:44 checking machine... 2023/06/20 05:49:44 checking revisions... [ 72.905380] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:49:44 testing simple program... [ 72.957950] cgroup: Unknown subsys name 'net' [ 72.997336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:49:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=1ffff11002c01f24 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801600f930 RSP=ffff88801600f868 R8 =ffffffff860d68fa R9 =ffff88801600f918 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801600f938 R13=ffff88801600f920 R14=0000000000000005 R15=ffff88801600f8d8 RIP=ffffffff81130b54 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 00007faba5b75900 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=00007faba612d0b0 CR3=000000001b862000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88800903b680 RSI=ffffffff844f2515 RDI=0000000000000007 RBP=ffff8880090df0d8 RSP=ffff8880090df038 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000002 R11=0000000000009293 R12=ffff88801b581e42 R13=dffffc0000000000 R14=1ffff1100121be1d R15=0000000000000001 RIP=ffffffff814c081b RFL=00000046 [---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 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=000055803b790000 CR3=000000000e630000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f666278ac71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000