syzkaller login: [ 40.796090] BUG: Bad rss-counter state mm:0000000015921939 type:MM_FILEPAGES val:33 [ 40.797105] BUG: Bad rss-counter state mm:0000000015921939 type:MM_ANONPAGES val:22 [ 40.842974] ================================================================== [ 40.843948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.844939] Read of size 8 at addr ffff88800d9335c8 by task sshd/219 [ 40.845776] [ 40.846005] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.846935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.847991] Call Trace: [ 40.848349] [ 40.848651] dump_stack_lvl+0x91/0xf0 [ 40.849166] print_report+0xcc/0x620 [ 40.849704] ? __virt_addr_valid+0x102/0x340 [ 40.850307] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.850953] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.851637] kasan_report+0xbe/0xf0 [ 40.852148] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.852831] vma_interval_tree_remove+0xc75/0xec0 [ 40.853507] vma_prepare+0xc54/0x11a0 [ 40.854016] __split_vma+0x5af/0x950 [ 40.854523] ? __pfx___split_vma+0x10/0x10 [ 40.855073] ? find_held_lock+0x2c/0x110 [ 40.855649] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.856242] ? lock_is_held_type+0x9f/0x120 [ 40.856817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.857510] ? mtree_range_walk+0x632/0x900 [ 40.858104] ? mas_walk+0x5c7/0x7c0 [ 40.858641] do_vmi_munmap+0x1f1/0x2b0 [ 40.859177] mmap_region+0x1f9/0x2660 [ 40.859724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.860293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.861058] ? __pfx_lock_acquire+0x10/0x10 [ 40.861679] ? __pfx_mmap_region+0x10/0x10 [ 40.862265] ? security_mmap_addr+0x7d/0xa0 [ 40.862843] ? get_unmapped_area+0x1f5/0x3f0 [ 40.863462] do_mmap+0x854/0xf00 [ 40.863956] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.864510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.865125] ksys_mmap_pgoff+0x3af/0x500 [ 40.865727] do_syscall_64+0x3f/0x90 [ 40.866255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.866973] RIP: 0033:0x7f1b37010d82 [ 40.867501] 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 [ 40.869875] RSP: 002b:00007ffeb6a12be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.870872] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b37010d82 [ 40.871795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b3644a000 [ 40.872756] RBP: 00007f1b3644a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.873789] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651509b5ec0 [ 40.874755] R13: 00007ffeb6a12c00 R14: 00007ffeb6a12c30 R15: 00007ffeb6a12f90 [ 40.875710] [ 40.876019] [ 40.876258] Allocated by task 212: [ 40.876722] kasan_save_stack+0x22/0x50 [ 40.877284] kasan_set_track+0x25/0x30 [ 40.877860] __kasan_slab_alloc+0x59/0x70 [ 40.878450] kmem_cache_alloc+0x16b/0x370 [ 40.879006] vm_area_dup+0x20/0x160 [ 40.879502] __split_vma+0x170/0x950 [ 40.879988] split_vma+0xc6/0x110 [ 40.880471] mprotect_fixup+0x8d2/0xb30 [ 40.881004] do_mprotect_pkey+0x87e/0xd40 [ 40.881613] __x64_sys_mprotect+0x78/0xc0 [ 40.882167] do_syscall_64+0x3f/0x90 [ 40.882701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.883411] [ 40.883641] Freed by task 212: [ 40.884057] kasan_save_stack+0x22/0x50 [ 40.884610] kasan_set_track+0x25/0x30 [ 40.885135] kasan_save_free_info+0x2b/0x50 [ 40.885760] __kasan_slab_free+0x10a/0x190 [ 40.886346] kmem_cache_free+0x10d/0x4d0 [ 40.886899] rcu_core+0x8c8/0x2860 [ 40.887383] __do_softirq+0x1b7/0x7d4 [ 40.887891] [ 40.888127] Last potentially related work creation: [ 40.888766] kasan_save_stack+0x22/0x50 [ 40.889330] __kasan_record_aux_stack+0x8e/0xa0 [ 40.889969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.890688] remove_vma+0x139/0x170 [ 40.891179] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.891800] do_vmi_munmap+0x1f1/0x2b0 [ 40.892340] __vm_munmap+0x138/0x3a0 [ 40.892843] __x64_sys_munmap+0x59/0x80 [ 40.893419] do_syscall_64+0x3f/0x90 [ 40.893940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.894822] [ 40.895138] Second to last potentially related work creation: [ 40.896116] kasan_save_stack+0x22/0x50 [ 40.896845] __kasan_record_aux_stack+0x8e/0xa0 [ 40.897538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.898217] remove_vma+0x139/0x170 [ 40.898727] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.899340] do_vmi_munmap+0x1f1/0x2b0 [ 40.899857] mmap_region+0x1f9/0x2660 [ 40.900385] do_mmap+0x854/0xf00 [ 40.900839] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.901388] ksys_mmap_pgoff+0x3af/0x500 [ 40.901946] do_syscall_64+0x3f/0x90 [ 40.902468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.903142] [ 40.903393] The buggy address belongs to the object at ffff88800d933570 [ 40.903393] which belongs to the cache vm_area_struct of size 168 [ 40.904956] The buggy address is located 88 bytes inside of [ 40.904956] freed 168-byte region [ffff88800d933570, ffff88800d933618) [ 40.906510] [ 40.906737] The buggy address belongs to the physical page: [ 40.907439] page:00000000ed00d22f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd933 [ 40.908614] memcg:ffff88800debfb01 [ 40.909063] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.909843] page_type: 0xffffffff() [ 40.910355] raw: 0100000000000200 ffff88800879fc80 ffffea00005b28c0 dead000000000005 [ 40.911352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800debfb01 [ 40.912334] page dumped because: kasan: bad access detected [ 40.913027] [ 40.913264] Memory state around the buggy address: [ 40.913912] ffff88800d933480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.914826] ffff88800d933500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.915752] >ffff88800d933580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.916671] ^ [ 40.917395] ffff88800d933600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 40.918312] ffff88800d933680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.919198] ================================================================== [ 40.920217] Disabling lock debugging due to kernel taint [ 43.588842] BUG: Bad rss-counter state mm:000000002a32c249 type:MM_FILEPAGES val:33 [ 43.589894] BUG: Bad rss-counter state mm:000000002a32c249 type:MM_ANONPAGES val:22 [ 44.023657] BUG: Bad rss-counter state mm:00000000fdf4ac4f type:MM_FILEPAGES val:33 [ 44.024713] BUG: Bad rss-counter state mm:00000000fdf4ac4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50711' (ECDSA) to the list of known hosts. 2023/06/19 16:24:37 fuzzer started 2023/06/19 16:24:38 dialing manager at localhost:44161 2023/06/19 16:24:38 checking machine... 2023/06/19 16:24:38 checking revisions... [ 44.755116] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:24:38 testing simple program... [ 44.812406] cgroup: Unknown subsys name 'net' [ 44.860480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:24:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce361a0 RCX=ffffffff812d869a RDX=1ffff1100d9c6c39 RSI=ffffffff81839a5a RDI=ffff88806ce361a0 RBP=ffff88806ce361c8 RSP=ffff8880169c7c70 R8 =0000000000000000 R9 =0000000000000003 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000000005c8 R15=0000000000000000 RIP=ffffffff812d8614 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 00007ff4cfd02900 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=00007ff4d02b9618 CR3=0000000016c70000 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=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f757d01 RSI=ffff88800f757d18 RDI=ffff88800f757d18 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000002852d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800f757d18 R15=ffff88806cf09a98 RIP=ffffffff81131236 RFL=00000202 [-------] 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=0000560fb7129448 CR3=000000001451e000 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=2037333a34323a3631203931206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a383538393520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000