syzkaller login: [ 31.630229] BUG: Bad rss-counter state mm:00000000d7bf6ca4 type:MM_FILEPAGES val:33 [ 31.631530] BUG: Bad rss-counter state mm:00000000d7bf6ca4 type:MM_ANONPAGES val:22 [ 31.670715] ================================================================== [ 31.671762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.672723] Read of size 8 at addr ffff8880163f13f8 by task sshd/221 [ 31.673506] [ 31.673733] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.674607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.675618] Call Trace: [ 31.675937] [ 31.676219] dump_stack_lvl+0x91/0xf0 [ 31.676715] print_report+0xcc/0x620 [ 31.677213] ? __virt_addr_valid+0x102/0x340 [ 31.677768] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.678381] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.679016] kasan_report+0xbe/0xf0 [ 31.679490] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.680119] vma_interval_tree_remove+0xc75/0xec0 [ 31.680734] vma_prepare+0xc54/0x11a0 [ 31.681222] __split_vma+0x5af/0x950 [ 31.681695] ? __pfx___split_vma+0x10/0x10 [ 31.682231] ? find_held_lock+0x2c/0x110 [ 31.682764] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.683339] ? lock_is_held_type+0x9f/0x120 [ 31.683878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.684490] ? mtree_range_walk+0x632/0x900 [ 31.685041] ? mas_walk+0x5c7/0x7c0 [ 31.685528] do_vmi_munmap+0x1f1/0x2b0 [ 31.686018] mmap_region+0x1f9/0x2660 [ 31.686512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.687041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.687761] ? __pfx_lock_acquire+0x10/0x10 [ 31.688291] ? __pfx_mmap_region+0x10/0x10 [ 31.688823] ? security_mmap_addr+0x7d/0xa0 [ 31.689356] ? get_unmapped_area+0x1f5/0x3f0 [ 31.689915] do_mmap+0x854/0xf00 [ 31.690356] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.690880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.691443] ksys_mmap_pgoff+0x3af/0x500 [ 31.691952] do_syscall_64+0x3f/0x90 [ 31.692435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.693087] RIP: 0033:0x7fba07c34d82 [ 31.693548] 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 [ 31.695696] RSP: 002b:00007ffc0c9750d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.696603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba07c34d82 [ 31.697465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba0706e000 [ 31.698340] RBP: 00007fba0706e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.699201] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7dea94f70 [ 31.700057] R13: 00007ffc0c9750f0 R14: 00007ffc0c975120 R15: 00007ffc0c975480 [ 31.700911] [ 31.701202] [ 31.701418] Allocated by task 213: [ 31.701855] kasan_save_stack+0x22/0x50 [ 31.702360] kasan_set_track+0x25/0x30 [ 31.702870] __kasan_slab_alloc+0x59/0x70 [ 31.703393] kmem_cache_alloc+0x16b/0x370 [ 31.703917] vm_area_dup+0x20/0x160 [ 31.704383] __split_vma+0x170/0x950 [ 31.704849] split_vma+0xc6/0x110 [ 31.705289] mprotect_fixup+0x8d2/0xb30 [ 31.705797] do_mprotect_pkey+0x87e/0xd40 [ 31.706319] __x64_sys_mprotect+0x78/0xc0 [ 31.706872] do_syscall_64+0x3f/0x90 [ 31.707353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.708008] [ 31.708222] Freed by task 213: [ 31.708618] kasan_save_stack+0x22/0x50 [ 31.709127] kasan_set_track+0x25/0x30 [ 31.709631] kasan_save_free_info+0x2b/0x50 [ 31.710166] __kasan_slab_free+0x10a/0x190 [ 31.710709] kmem_cache_free+0x10d/0x4d0 [ 31.711222] rcu_core+0x8c8/0x2860 [ 31.711671] __do_softirq+0x1b7/0x7d4 [ 31.712150] [ 31.712371] Last potentially related work creation: [ 31.712957] kasan_save_stack+0x22/0x50 [ 31.713458] __kasan_record_aux_stack+0x8e/0xa0 [ 31.714029] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.714681] remove_vma+0x139/0x170 [ 31.715140] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.715715] do_vmi_munmap+0x1f1/0x2b0 [ 31.716204] __vm_munmap+0x138/0x3a0 [ 31.716672] __x64_sys_munmap+0x59/0x80 [ 31.717173] do_syscall_64+0x3f/0x90 [ 31.717644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.718300] [ 31.718514] The buggy address belongs to the object at ffff8880163f13a0 [ 31.718514] which belongs to the cache vm_area_struct of size 168 [ 31.720001] The buggy address is located 88 bytes inside of [ 31.720001] freed 168-byte region [ffff8880163f13a0, ffff8880163f1448) [ 31.721406] [ 31.721628] The buggy address belongs to the physical page: [ 31.722285] page:000000003e216baf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163f1 [ 31.723382] memcg:ffff888016094d01 [ 31.723815] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.724460] page_type: 0xffffffff() [ 31.724917] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.725834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016094d01 [ 31.726755] page dumped because: kasan: bad access detected [ 31.727413] [ 31.727633] Memory state around the buggy address: [ 31.728221] ffff8880163f1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.729078] ffff8880163f1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.729933] >ffff8880163f1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.730803] ^ [ 31.731666] ffff8880163f1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.732522] ffff8880163f1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.733395] ================================================================== [ 31.734601] Disabling lock debugging due to kernel taint [ 33.700368] BUG: Bad rss-counter state mm:00000000bef402dc type:MM_FILEPAGES val:33 [ 33.701439] BUG: Bad rss-counter state mm:00000000bef402dc type:MM_ANONPAGES val:22 [ 34.218356] BUG: Bad rss-counter state mm:000000004cdbd097 type:MM_FILEPAGES val:33 [ 34.219490] BUG: Bad rss-counter state mm:000000004cdbd097 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34326' (ECDSA) to the list of known hosts. 2023/06/19 22:11:40 fuzzer started 2023/06/19 22:11:41 dialing manager at localhost:44161 2023/06/19 22:11:41 checking machine... 2023/06/19 22:11:41 checking revisions... [ 34.951905] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:11:41 testing simple program... [ 34.999678] cgroup: Unknown subsys name 'net' [ 35.045289] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fb266126648 CR3=000000000d89a000 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=a6721478d2a964b37b477751d6f8910b XMM02=000000000011fbf8eff9b2d0a8fce9cb XMM03=000000000011fcc82c67c8bc2e329bc3 XMM04=8662390dc100272400000000000ae988 XMM05=e4cb8bb95a7664b60000000000133f80 XMM06=caa36273c187647a0000000000132de8 XMM07=e042d86d42eb936e0000000000124650 XMM08=0d8a562a17c3a2c0000000000011fcc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=45a5395a1dc01400 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed10011e7e8a RSP=ffff888008f3f440 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000092700000927 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff812d89f4 RFL=00000282 [--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 00007f907f722900 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=00007fff4f19c000 CR3=000000000f528000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000