syzkaller login: [ 60.334407] BUG: Bad rss-counter state mm:00000000626ef6fa type:MM_FILEPAGES val:33 [ 60.336213] BUG: Bad rss-counter state mm:00000000626ef6fa type:MM_ANONPAGES val:22 [ 60.499751] ================================================================== [ 60.500701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.501647] Read of size 8 at addr ffff88800da96140 by task sshd/220 [ 60.502430] [ 60.502651] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.503613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.504586] Call Trace: [ 60.504904] [ 60.505187] dump_stack_lvl+0x91/0xf0 [ 60.505679] print_report+0xcc/0x620 [ 60.506160] ? __virt_addr_valid+0x102/0x340 [ 60.506738] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.507356] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.507972] kasan_report+0xbe/0xf0 [ 60.508452] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.509068] vma_interval_tree_remove+0xc75/0xec0 [ 60.509688] vma_prepare+0xc54/0x11a0 [ 60.510172] __split_vma+0x5af/0x950 [ 60.510656] ? __pfx___split_vma+0x10/0x10 [ 60.511183] ? find_held_lock+0x2c/0x110 [ 60.511702] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.512262] ? lock_is_held_type+0x9f/0x120 [ 60.512812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.513425] ? mtree_range_walk+0x632/0x900 [ 60.513995] ? mas_walk+0x5c7/0x7c0 [ 60.514481] do_vmi_munmap+0x1f1/0x2b0 [ 60.514976] mmap_region+0x1f9/0x2660 [ 60.515455] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.515962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.516677] ? __pfx_lock_acquire+0x10/0x10 [ 60.517219] ? __pfx_mmap_region+0x10/0x10 [ 60.517750] ? security_mmap_addr+0x7d/0xa0 [ 60.518281] ? get_unmapped_area+0x1f5/0x3f0 [ 60.518849] do_mmap+0x854/0xf00 [ 60.519289] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.519789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.520360] ksys_mmap_pgoff+0x3af/0x500 [ 60.520875] do_syscall_64+0x3f/0x90 [ 60.521360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.522020] RIP: 0033:0x7f6d72088d82 [ 60.522481] 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 [ 60.524617] RSP: 002b:00007ffda72272f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.525551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d72088d82 [ 60.526430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d714c2000 [ 60.527279] RBP: 00007f6d714c2000 R08: 0000000000000009 R09: 0000000000001000 [ 60.528140] R10: 0000000000000812 R11: 0000000000000206 R12: 000056280c40aec0 [ 60.528985] R13: 00007ffda7227310 R14: 00007ffda7227340 R15: 00007ffda72276a0 [ 60.529858] [ 60.530152] [ 60.530366] Allocated by task 213: [ 60.530805] kasan_save_stack+0x22/0x50 [ 60.531308] kasan_set_track+0x25/0x30 [ 60.531807] __kasan_slab_alloc+0x59/0x70 [ 60.532337] kmem_cache_alloc+0x16b/0x370 [ 60.532857] vm_area_dup+0x20/0x160 [ 60.533321] __split_vma+0x170/0x950 [ 60.533799] split_vma+0xc6/0x110 [ 60.534252] mprotect_fixup+0x8d2/0xb30 [ 60.534770] do_mprotect_pkey+0x87e/0xd40 [ 60.535298] __x64_sys_mprotect+0x78/0xc0 [ 60.535837] do_syscall_64+0x3f/0x90 [ 60.536322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.536980] [ 60.537193] Freed by task 19: [ 60.537592] kasan_save_stack+0x22/0x50 [ 60.538116] kasan_set_track+0x25/0x30 [ 60.538638] kasan_save_free_info+0x2b/0x50 [ 60.539181] __kasan_slab_free+0x10a/0x190 [ 60.539718] kmem_cache_free+0x10d/0x4d0 [ 60.540236] rcu_core+0x8c8/0x2860 [ 60.540677] __do_softirq+0x1b7/0x7d4 [ 60.541156] [ 60.541376] Last potentially related work creation: [ 60.541971] kasan_save_stack+0x22/0x50 [ 60.542494] __kasan_record_aux_stack+0x8e/0xa0 [ 60.543088] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.543736] remove_vma+0x139/0x170 [ 60.544189] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.544765] do_vmi_munmap+0x1f1/0x2b0 [ 60.545264] __vm_munmap+0x138/0x3a0 [ 60.545739] __x64_sys_munmap+0x59/0x80 [ 60.546238] do_syscall_64+0x3f/0x90 [ 60.546730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.547372] [ 60.547590] Second to last potentially related work creation: [ 60.548276] kasan_save_stack+0x22/0x50 [ 60.548785] __kasan_record_aux_stack+0x8e/0xa0 [ 60.549369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.550020] remove_vma+0x139/0x170 [ 60.550502] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.551069] do_vmi_munmap+0x1f1/0x2b0 [ 60.551560] mmap_region+0x1f9/0x2660 [ 60.552040] do_mmap+0x854/0xf00 [ 60.552482] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.552971] ksys_mmap_pgoff+0x3af/0x500 [ 60.553472] do_syscall_64+0x3f/0x90 [ 60.553956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.554611] [ 60.554825] The buggy address belongs to the object at ffff88800da960e8 [ 60.554825] which belongs to the cache vm_area_struct of size 168 [ 60.556295] The buggy address is located 88 bytes inside of [ 60.556295] freed 168-byte region [ffff88800da960e8, ffff88800da96190) [ 60.557709] [ 60.557923] The buggy address belongs to the physical page: [ 60.558601] page:0000000065e7a821 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda96 [ 60.559710] memcg:ffff8880165bcd01 [ 60.560135] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.560773] page_type: 0xffffffff() [ 60.561225] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 60.562141] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165bcd01 [ 60.563071] page dumped because: kasan: bad access detected [ 60.563740] [ 60.563955] Memory state around the buggy address: [ 60.564548] ffff88800da96000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.565400] ffff88800da96080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 60.566259] >ffff88800da96100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.567151] ^ [ 60.567805] ffff88800da96180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 60.568661] ffff88800da96200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 60.569513] ================================================================== [ 60.570598] Disabling lock debugging due to kernel taint [ 62.592578] BUG: Bad rss-counter state mm:000000000a55804e type:MM_FILEPAGES val:33 [ 62.593568] BUG: Bad rss-counter state mm:000000000a55804e type:MM_ANONPAGES val:22 [ 63.030528] BUG: Bad rss-counter state mm:0000000047d8e0f5 type:MM_FILEPAGES val:33 [ 63.031525] BUG: Bad rss-counter state mm:0000000047d8e0f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30523' (ECDSA) to the list of known hosts. 2023/06/20 21:09:27 fuzzer started 2023/06/20 21:09:27 dialing manager at localhost:36067 2023/06/20 21:09:27 checking machine... 2023/06/20 21:09:27 checking revisions... [ 63.734589] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:09:27 testing simple program... [ 63.784842] cgroup: Unknown subsys name 'net' [ 63.834340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:09:27 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=0000556ef604d300 RCX=00007ffd0f8354e8 RDX=00007ffd0f8354e0 RSI=00007ffd0f8354d3 RDI=00007ffd0f8354d2 RBP=00007ffd0f835a20 RSP=00007ffd0f835450 R8 =0000556ef602dce0 R9 =00000000ffffffff R10=0000556ef6027eb0 R11=0000000000000000 R12=0000000000000000 R13=00007ffd0f835a40 R14=0000556ef604d3f0 R15=00007ffd0f835af0 RIP=00007f3a25aedf01 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3a255e0900 00000000 00000000 GS =0000 0000000000000000 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=00007f3a25b980b0 CR3=00000000097ce000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1458a79150 CR3=0000000009ac4000 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=cf2ef71653b1c3b7034382df4eccbbb9 XMM02=000000000011d708ec2efd57dc4c00df XMM03=0000000000121e7078255d6d492dd95b XMM04=dd7b4e5d1b61d4cd00000000000ae988 XMM05=b6b9be93f11a0f1e0000000000133de0 XMM06=4fda316b135da52b0000000000132e80 XMM07=e042d86d42eb936e00000000001220f0 XMM08=78255d6d492dd95b000000000011d768 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000