syzkaller login: [ 32.773494] BUG: Bad rss-counter state mm:00000000a76506ee type:MM_FILEPAGES val:33 [ 32.774674] BUG: Bad rss-counter state mm:00000000a76506ee type:MM_ANONPAGES val:22 [ 32.817991] ================================================================== [ 32.818915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.820146] Read of size 8 at addr ffff88800e35e5c8 by task sshd/220 [ 32.820973] [ 32.821189] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.822050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.823060] Call Trace: [ 32.823381] [ 32.823678] dump_stack_lvl+0x91/0xf0 [ 32.824174] print_report+0xcc/0x620 [ 32.824680] ? __virt_addr_valid+0x102/0x340 [ 32.825231] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.825856] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.826471] kasan_report+0xbe/0xf0 [ 32.826979] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.827604] vma_interval_tree_remove+0xc75/0xec0 [ 32.828208] vma_prepare+0xc54/0x11a0 [ 32.828702] __split_vma+0x5af/0x950 [ 32.829176] ? __pfx___split_vma+0x10/0x10 [ 32.829724] ? find_held_lock+0x2c/0x110 [ 32.830249] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.830847] ? lock_is_held_type+0x9f/0x120 [ 32.831386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.832019] ? mtree_range_walk+0x632/0x900 [ 32.832583] ? mas_walk+0x5c7/0x7c0 [ 32.833066] do_vmi_munmap+0x1f1/0x2b0 [ 32.833569] mmap_region+0x1f9/0x2660 [ 32.834074] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.834594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.835320] ? __pfx_lock_acquire+0x10/0x10 [ 32.835867] ? __pfx_mmap_region+0x10/0x10 [ 32.836392] ? security_mmap_addr+0x7d/0xa0 [ 32.836934] ? get_unmapped_area+0x1f5/0x3f0 [ 32.837481] do_mmap+0x854/0xf00 [ 32.837944] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.838438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.839020] ksys_mmap_pgoff+0x3af/0x500 [ 32.839525] do_syscall_64+0x3f/0x90 [ 32.840037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.840704] RIP: 0033:0x7f0256ee2d82 [ 32.841170] 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 [ 32.843391] RSP: 002b:00007ffd26edeec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.844333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0256ee2d82 [ 32.845208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f025631c000 [ 32.846079] RBP: 00007f025631c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.846956] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557610a46ec0 [ 32.847851] R13: 00007ffd26edeee0 R14: 00007ffd26edef10 R15: 00007ffd26edf270 [ 32.848734] [ 32.849025] [ 32.849244] Allocated by task 213: [ 32.849697] kasan_save_stack+0x22/0x50 [ 32.850202] kasan_set_track+0x25/0x30 [ 32.850711] __kasan_slab_alloc+0x59/0x70 [ 32.851269] kmem_cache_alloc+0x16b/0x370 [ 32.851804] vm_area_dup+0x20/0x160 [ 32.852278] __split_vma+0x170/0x950 [ 32.852771] split_vma+0xc6/0x110 [ 32.853217] mprotect_fixup+0x8d2/0xb30 [ 32.853750] do_mprotect_pkey+0x87e/0xd40 [ 32.854275] __x64_sys_mprotect+0x78/0xc0 [ 32.854820] do_syscall_64+0x3f/0x90 [ 32.855308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.855969] [ 32.856184] Freed by task 213: [ 32.856586] kasan_save_stack+0x22/0x50 [ 32.857089] kasan_set_track+0x25/0x30 [ 32.857609] kasan_save_free_info+0x2b/0x50 [ 32.858167] __kasan_slab_free+0x10a/0x190 [ 32.858713] kmem_cache_free+0x10d/0x4d0 [ 32.859266] rcu_core+0x8c8/0x2860 [ 32.859719] __do_softirq+0x1b7/0x7d4 [ 32.860194] [ 32.860409] Last potentially related work creation: [ 32.861009] kasan_save_stack+0x22/0x50 [ 32.861512] __kasan_record_aux_stack+0x8e/0xa0 [ 32.862093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.862770] remove_vma+0x139/0x170 [ 32.863318] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.863889] do_vmi_munmap+0x1f1/0x2b0 [ 32.864371] __vm_munmap+0x138/0x3a0 [ 32.864846] __x64_sys_munmap+0x59/0x80 [ 32.865385] do_syscall_64+0x3f/0x90 [ 32.865871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.866509] [ 32.866769] The buggy address belongs to the object at ffff88800e35e570 [ 32.866769] which belongs to the cache vm_area_struct of size 168 [ 32.868239] The buggy address is located 88 bytes inside of [ 32.868239] freed 168-byte region [ffff88800e35e570, ffff88800e35e618) [ 32.869673] [ 32.869890] The buggy address belongs to the physical page: [ 32.870546] page:000000003df5bac5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe35e [ 32.871660] memcg:ffff888016bec501 [ 32.872095] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.872751] page_type: 0xffffffff() [ 32.873205] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.874135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bec501 [ 32.875052] page dumped because: kasan: bad access detected [ 32.875726] [ 32.875943] Memory state around the buggy address: [ 32.876540] ffff88800e35e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.877421] ffff88800e35e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.878301] >ffff88800e35e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.879188] ^ [ 32.879857] ffff88800e35e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.880722] ffff88800e35e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.881569] ================================================================== [ 32.882523] Disabling lock debugging due to kernel taint [ 34.871266] BUG: Bad rss-counter state mm:000000003ad753f4 type:MM_FILEPAGES val:33 [ 34.872265] BUG: Bad rss-counter state mm:000000003ad753f4 type:MM_ANONPAGES val:22 [ 35.331763] BUG: Bad rss-counter state mm:000000004e9b3fde type:MM_FILEPAGES val:33 [ 35.333124] BUG: Bad rss-counter state mm:000000004e9b3fde type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32893' (ECDSA) to the list of known hosts. 2023/06/19 16:53:32 fuzzer started 2023/06/19 16:53:32 dialing manager at localhost:44161 2023/06/19 16:53:33 checking machine... 2023/06/19 16:53:33 checking revisions... [ 35.965080] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:53:33 testing simple program... [ 36.019131] cgroup: Unknown subsys name 'net' [ 36.056458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:53:31 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=1ffff1100206bfa5 RSI=ffffffff815a2954 RDI=ffffc90000681049 RBP=ffff88801035fd28 RSP=ffff88801035fc58 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=ffff88801035fd28 R13=ffff88801035fd28 R14=0000000000000000 R15=ffffc90000681050 RIP=ffffffff814c07f1 RFL=00000296 [--S-AP-] 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 00007fa1d64f2900 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=00007fa1d5a13000 CR3=000000000c62a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f694406fed36d01900000000000ae988 XMM05=feb5853344c104030000000000135dd0 XMM06=4fda316b135da52b0000000000134e70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888009bb7778 RSI=ffff888009bb7740 RDI=ffff888009bb7420 RBP=ffff888009bb74a8 RSP=ffff888009bb73f0 R8 =0000000000000001 R9 =ffff888009bb7450 R10=0000000000038001 R11=000000000008b39b R12=ffff888009bb74d8 R13=ffff888009bb7458 R14=ffff888009bb7740 R15=ffff888009bb7410 RIP=ffffffff81130933 RFL=00000286 [--S--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 00007f62673c5900 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=00007f626797c618 CR3=000000000c596000 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