syzkaller login: [ 30.573903] BUG: Bad rss-counter state mm:00000000d3be0827 type:MM_FILEPAGES val:33 [ 30.574956] BUG: Bad rss-counter state mm:00000000d3be0827 type:MM_ANONPAGES val:22 [ 30.733148] ================================================================== [ 30.734292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.735455] Read of size 8 at addr ffff88801947bed8 by task sshd/219 [ 30.736454] [ 30.736682] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.737600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.738640] Call Trace: [ 30.738966] [ 30.739258] dump_stack_lvl+0x91/0xf0 [ 30.739778] print_report+0xcc/0x620 [ 30.740283] ? __virt_addr_valid+0x102/0x340 [ 30.740865] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741506] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742156] kasan_report+0xbe/0xf0 [ 30.742646] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743283] vma_interval_tree_remove+0xc75/0xec0 [ 30.743901] vma_prepare+0xc54/0x11a0 [ 30.744398] __split_vma+0x5af/0x950 [ 30.744888] ? __pfx___split_vma+0x10/0x10 [ 30.745429] ? find_held_lock+0x2c/0x110 [ 30.745986] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.746562] ? lock_is_held_type+0x9f/0x120 [ 30.747116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.747731] ? mtree_range_walk+0x632/0x900 [ 30.748307] ? mas_walk+0x5c7/0x7c0 [ 30.748795] do_vmi_munmap+0x1f1/0x2b0 [ 30.749303] mmap_region+0x1f9/0x2660 [ 30.749806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.750335] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.751072] ? __pfx_lock_acquire+0x10/0x10 [ 30.751629] ? __pfx_mmap_region+0x10/0x10 [ 30.752173] ? security_mmap_addr+0x7d/0xa0 [ 30.752723] ? get_unmapped_area+0x1f5/0x3f0 [ 30.753299] do_mmap+0x854/0xf00 [ 30.753757] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.754269] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.754853] ksys_mmap_pgoff+0x3af/0x500 [ 30.755377] do_syscall_64+0x3f/0x90 [ 30.755880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756552] RIP: 0033:0x7f12fb692d82 [ 30.757022] 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 [ 30.759235] RSP: 002b:00007ffec44a0638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.760175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12fb692d82 [ 30.761062] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12faacc000 [ 30.761941] RBP: 00007f12faacc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.762823] R10: 0000000000000812 R11: 0000000000000206 R12: 000055655e42aec0 [ 30.763696] R13: 00007ffec44a0650 R14: 00007ffec44a0680 R15: 00007ffec44a09e0 [ 30.764574] [ 30.764879] [ 30.765100] Allocated by task 212: [ 30.765554] kasan_save_stack+0x22/0x50 [ 30.766071] kasan_set_track+0x25/0x30 [ 30.766575] __kasan_slab_alloc+0x59/0x70 [ 30.767121] kmem_cache_alloc+0x16b/0x370 [ 30.767649] vm_area_dup+0x20/0x160 [ 30.768118] __split_vma+0x170/0x950 [ 30.768603] split_vma+0xc6/0x110 [ 30.769065] mprotect_fixup+0x8d2/0xb30 [ 30.769603] do_mprotect_pkey+0x87e/0xd40 [ 30.770147] __x64_sys_mprotect+0x78/0xc0 [ 30.770703] do_syscall_64+0x3f/0x90 [ 30.771195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771872] [ 30.772096] Freed by task 212: [ 30.772506] kasan_save_stack+0x22/0x50 [ 30.773029] kasan_set_track+0x25/0x30 [ 30.773559] kasan_save_free_info+0x2b/0x50 [ 30.774119] __kasan_slab_free+0x10a/0x190 [ 30.774672] kmem_cache_free+0x10d/0x4d0 [ 30.775201] rcu_core+0x8c8/0x2860 [ 30.775672] __do_softirq+0x1b7/0x7d4 [ 30.776173] [ 30.776400] Last potentially related work creation: [ 30.777012] kasan_save_stack+0x22/0x50 [ 30.777554] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.778826] remove_vma+0x139/0x170 [ 30.779304] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.779896] do_vmi_munmap+0x1f1/0x2b0 [ 30.780402] __vm_munmap+0x138/0x3a0 [ 30.780894] __x64_sys_munmap+0x59/0x80 [ 30.781414] do_syscall_64+0x3f/0x90 [ 30.781922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782599] [ 30.782828] The buggy address belongs to the object at ffff88801947be80 [ 30.782828] which belongs to the cache vm_area_struct of size 168 [ 30.784374] The buggy address is located 88 bytes inside of [ 30.784374] freed 168-byte region [ffff88801947be80, ffff88801947bf28) [ 30.785879] [ 30.786109] The buggy address belongs to the physical page: [ 30.786806] page:0000000065504e61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1947b [ 30.787942] memcg:ffff8880176b5101 [ 30.788384] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789061] page_type: 0xffffffff() [ 30.789558] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.790524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880176b5101 [ 30.791466] page dumped because: kasan: bad access detected [ 30.792166] [ 30.792389] Memory state around the buggy address: [ 30.792997] ffff88801947bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.793907] ffff88801947be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.794807] >ffff88801947be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795713] ^ [ 30.796480] ffff88801947bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.797392] ffff88801947bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.798296] ================================================================== [ 30.799322] Disabling lock debugging due to kernel taint [ 32.712644] BUG: Bad rss-counter state mm:00000000bb6c3ce4 type:MM_FILEPAGES val:33 [ 32.713887] BUG: Bad rss-counter state mm:00000000bb6c3ce4 type:MM_ANONPAGES val:22 [ 33.208865] BUG: Bad rss-counter state mm:00000000219f1bb9 type:MM_FILEPAGES val:33 [ 33.209901] BUG: Bad rss-counter state mm:00000000219f1bb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32251' (ECDSA) to the list of known hosts. 2023/06/21 03:58:18 fuzzer started 2023/06/21 03:58:18 dialing manager at localhost:36067 2023/06/21 03:58:18 checking machine... 2023/06/21 03:58:18 checking revisions... [ 33.915192] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:58:18 testing simple program... [ 33.955850] cgroup: Unknown subsys name 'net' [ 33.992834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:58:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff17e21998 CR3=0000000005482000 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=00007f44b007d5100000561ba7d2d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801658fde0 RCX=0000000000000001 RDX=1ffff11002cb1f58 RSI=ffff88801658fdc8 RDI=ffff88801658fac0 RBP=ffff888016588000 RSP=ffff88801658fa40 R8 =0000000000000001 R9 =ffff88801658faf0 R10=0000000000038001 R11=00000000000246c8 R12=ffff88801658fb10 R13=ffff88801658faf8 R14=ffff88801658fdc8 R15=ffff88801658fab0 RIP=ffffffff81131cac 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 00007f4b74017900 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=00007f4b745cc650 CR3=000000001aaf2000 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=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