syzkaller login: [ 82.067894] BUG: Bad rss-counter state mm:000000001131160b type:MM_FILEPAGES val:33 [ 82.069112] BUG: Bad rss-counter state mm:000000001131160b type:MM_ANONPAGES val:22 [ 82.214837] ================================================================== [ 82.215750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 82.216708] Read of size 8 at addr ffff88800c522968 by task sshd/220 [ 82.217616] [ 82.217838] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 82.218871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 82.219869] Call Trace: [ 82.220186] [ 82.220469] dump_stack_lvl+0x91/0xf0 [ 82.220961] print_report+0xcc/0x620 [ 82.221479] ? __virt_addr_valid+0x102/0x340 [ 82.222038] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.222659] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.223272] kasan_report+0xbe/0xf0 [ 82.223766] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.224395] vma_interval_tree_remove+0xc75/0xec0 [ 82.225022] vma_prepare+0xc54/0x11a0 [ 82.225519] __split_vma+0x5af/0x950 [ 82.225996] ? __pfx___split_vma+0x10/0x10 [ 82.226522] ? find_held_lock+0x2c/0x110 [ 82.227053] do_vmi_align_munmap+0x2ba/0x11f0 [ 82.227631] ? lock_is_held_type+0x9f/0x120 [ 82.228182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 82.228793] ? mtree_range_walk+0x632/0x900 [ 82.229365] ? mas_walk+0x5c7/0x7c0 [ 82.229840] do_vmi_munmap+0x1f1/0x2b0 [ 82.230338] mmap_region+0x1f9/0x2660 [ 82.230822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 82.231341] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 82.232064] ? __pfx_lock_acquire+0x10/0x10 [ 82.232598] ? __pfx_mmap_region+0x10/0x10 [ 82.233131] ? security_mmap_addr+0x7d/0xa0 [ 82.233690] ? get_unmapped_area+0x1f5/0x3f0 [ 82.234249] do_mmap+0x854/0xf00 [ 82.234690] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.235189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 82.235753] ksys_mmap_pgoff+0x3af/0x500 [ 82.236258] do_syscall_64+0x3f/0x90 [ 82.236735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.237389] RIP: 0033:0x7fc51120ad82 [ 82.237876] 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 [ 82.240001] RSP: 002b:00007ffe7b52dc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 82.240900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc51120ad82 [ 82.241764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc510644000 [ 82.242621] RBP: 00007fc510644000 R08: 0000000000000009 R09: 0000000000001000 [ 82.243475] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602fd2eaec0 [ 82.244327] R13: 00007ffe7b52dc20 R14: 00007ffe7b52dc50 R15: 00007ffe7b52dfb0 [ 82.245184] [ 82.245504] [ 82.245720] Allocated by task 213: [ 82.246152] kasan_save_stack+0x22/0x50 [ 82.246657] kasan_set_track+0x25/0x30 [ 82.247152] __kasan_slab_alloc+0x59/0x70 [ 82.247676] kmem_cache_alloc+0x16b/0x370 [ 82.248194] vm_area_dup+0x20/0x160 [ 82.248650] __split_vma+0x170/0x950 [ 82.249117] split_vma+0xc6/0x110 [ 82.249594] mprotect_fixup+0x8d2/0xb30 [ 82.250108] do_mprotect_pkey+0x87e/0xd40 [ 82.250627] __x64_sys_mprotect+0x78/0xc0 [ 82.251149] do_syscall_64+0x3f/0x90 [ 82.251626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.252262] [ 82.252478] Freed by task 213: [ 82.252868] kasan_save_stack+0x22/0x50 [ 82.253389] kasan_set_track+0x25/0x30 [ 82.253886] kasan_save_free_info+0x2b/0x50 [ 82.254416] __kasan_slab_free+0x10a/0x190 [ 82.254951] kmem_cache_free+0x10d/0x4d0 [ 82.255458] rcu_core+0x8c8/0x2860 [ 82.255906] __do_softirq+0x1b7/0x7d4 [ 82.256390] [ 82.256606] Last potentially related work creation: [ 82.257186] kasan_save_stack+0x22/0x50 [ 82.257697] __kasan_record_aux_stack+0x8e/0xa0 [ 82.258275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.258922] remove_vma+0x139/0x170 [ 82.259374] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.259931] do_vmi_munmap+0x1f1/0x2b0 [ 82.260416] __vm_munmap+0x138/0x3a0 [ 82.260881] __x64_sys_munmap+0x59/0x80 [ 82.261387] do_syscall_64+0x3f/0x90 [ 82.261862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.262504] [ 82.262720] The buggy address belongs to the object at ffff88800c522910 [ 82.262720] which belongs to the cache vm_area_struct of size 168 [ 82.264195] The buggy address is located 88 bytes inside of [ 82.264195] freed 168-byte region [ffff88800c522910, ffff88800c5229b8) [ 82.265622] [ 82.265839] The buggy address belongs to the physical page: [ 82.266516] page:0000000077fdb875 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc522 [ 82.267626] memcg:ffff888016893201 [ 82.268055] flags: 0x100000000000200(slab|node=0|zone=1) [ 82.268704] page_type: 0xffffffff() [ 82.269154] raw: 0100000000000200 ffff88800879fc80 ffffea000063a440 dead000000000006 [ 82.270078] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016893201 [ 82.270990] page dumped because: kasan: bad access detected [ 82.271670] [ 82.271890] Memory state around the buggy address: [ 82.272481] ffff88800c522800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 82.273360] ffff88800c522880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 82.274257] >ffff88800c522900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.275122] ^ [ 82.275916] ffff88800c522980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 82.276777] ffff88800c522a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.277646] ================================================================== [ 82.279151] Disabling lock debugging due to kernel taint [ 84.194800] BUG: Bad rss-counter state mm:0000000041514c82 type:MM_FILEPAGES val:33 [ 84.195952] BUG: Bad rss-counter state mm:0000000041514c82 type:MM_ANONPAGES val:22 [ 84.674973] BUG: Bad rss-counter state mm:00000000ff55fb06 type:MM_FILEPAGES val:33 [ 84.676062] BUG: Bad rss-counter state mm:00000000ff55fb06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28722' (ECDSA) to the list of known hosts. 2023/06/20 01:41:07 fuzzer started 2023/06/20 01:41:08 dialing manager at localhost:44161 2023/06/20 01:41:08 checking machine... 2023/06/20 01:41:08 checking revisions... [ 85.411596] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:41:08 testing simple program... [ 85.462081] cgroup: Unknown subsys name 'net' [ 85.527660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:40:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81288f48 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff85407ea0 RDI=ffffffff81288f48 RBP=ffffffff81288f48 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba82 R12=0000000000000001 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801ccc37a0 RIP=ffffffff811fc772 RFL=00000287 [--S--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 0000000000000000 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=00007ffc01778a88 CR3=000000000fed4000 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=2037303a31343a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31343a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf3d1a0 RCX=0000000000000000 RDX=ffffffff81807215 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888016bb7670 RSP=ffff888016bb75b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888018d84000 R12=ffff888008442280 R13=ffff888008e1c000 R14=0000000000000000 R15=ffff88806cf3d180 RIP=ffffffff818072a6 RFL=00000082 [--S----] 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 00007f3a0e345900 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=00007f3a0e8fc618 CR3=000000000db58000 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