syzkaller login: [ 45.139205] BUG: Bad rss-counter state mm:0000000014e597c5 type:MM_FILEPAGES val:33 [ 45.140688] BUG: Bad rss-counter state mm:0000000014e597c5 type:MM_ANONPAGES val:22 [ 45.314897] ================================================================== [ 45.315959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.317071] Read of size 8 at addr ffff88801a5c0968 by task sshd/219 [ 45.317918] [ 45.318154] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.319115] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.320173] Call Trace: [ 45.320519] [ 45.320831] dump_stack_lvl+0x91/0xf0 [ 45.321368] print_report+0xcc/0x620 [ 45.321891] ? __virt_addr_valid+0x102/0x340 [ 45.322498] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.323177] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.323845] kasan_report+0xbe/0xf0 [ 45.324365] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.325043] vma_interval_tree_remove+0xc75/0xec0 [ 45.325703] vma_prepare+0xc54/0x11a0 [ 45.326231] __split_vma+0x5af/0x950 [ 45.326764] ? __pfx___split_vma+0x10/0x10 [ 45.327344] ? find_held_lock+0x2c/0x110 [ 45.327915] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.328532] ? lock_is_held_type+0x9f/0x120 [ 45.329116] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.329774] ? mtree_range_walk+0x632/0x900 [ 45.330372] ? mas_walk+0x5c7/0x7c0 [ 45.330899] do_vmi_munmap+0x1f1/0x2b0 [ 45.331438] mmap_region+0x1f9/0x2660 [ 45.331968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.332521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.333297] ? __pfx_lock_acquire+0x10/0x10 [ 45.333881] ? __pfx_mmap_region+0x10/0x10 [ 45.334465] ? security_mmap_addr+0x7d/0xa0 [ 45.335055] ? get_unmapped_area+0x1f5/0x3f0 [ 45.335652] do_mmap+0x854/0xf00 [ 45.336131] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.336664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.337277] ksys_mmap_pgoff+0x3af/0x500 [ 45.337832] do_syscall_64+0x3f/0x90 [ 45.338356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.339086] RIP: 0033:0x7fc89d7e1d82 [ 45.339586] 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 [ 45.341918] RSP: 002b:00007ffccd3ff948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.342901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc89d7e1d82 [ 45.343793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc89cc1b000 [ 45.344680] RBP: 00007fc89cc1b000 R08: 0000000000000009 R09: 0000000000001000 [ 45.345569] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba070faec0 [ 45.346455] R13: 00007ffccd3ff960 R14: 00007ffccd3ff990 R15: 00007ffccd3ffcf0 [ 45.347374] [ 45.347684] [ 45.347909] Allocated by task 212: [ 45.348359] kasan_save_stack+0x22/0x50 [ 45.348889] kasan_set_track+0x25/0x30 [ 45.349407] __kasan_slab_alloc+0x59/0x70 [ 45.349960] kmem_cache_alloc+0x16b/0x370 [ 45.350505] vm_area_dup+0x20/0x160 [ 45.350992] __split_vma+0x170/0x950 [ 45.351492] split_vma+0xc6/0x110 [ 45.351949] mprotect_fixup+0x8d2/0xb30 [ 45.352472] do_mprotect_pkey+0x87e/0xd40 [ 45.353024] __x64_sys_mprotect+0x78/0xc0 [ 45.353571] do_syscall_64+0x3f/0x90 [ 45.354071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.354762] [ 45.354992] Freed by task 203: [ 45.355409] kasan_save_stack+0x22/0x50 [ 45.355939] kasan_set_track+0x25/0x30 [ 45.356456] kasan_save_free_info+0x2b/0x50 [ 45.357026] __kasan_slab_free+0x10a/0x190 [ 45.357589] kmem_cache_free+0x10d/0x4d0 [ 45.358131] rcu_core+0x8c8/0x2860 [ 45.358599] __do_softirq+0x1b7/0x7d4 [ 45.359118] [ 45.359348] Last potentially related work creation: [ 45.359968] kasan_save_stack+0x22/0x50 [ 45.360496] __kasan_record_aux_stack+0x8e/0xa0 [ 45.361099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.361773] remove_vma+0x139/0x170 [ 45.362254] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.362860] do_vmi_munmap+0x1f1/0x2b0 [ 45.363378] __vm_munmap+0x138/0x3a0 [ 45.363875] __x64_sys_munmap+0x59/0x80 [ 45.364409] do_syscall_64+0x3f/0x90 [ 45.364909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.365590] [ 45.365815] The buggy address belongs to the object at ffff88801a5c0910 [ 45.365815] which belongs to the cache vm_area_struct of size 168 [ 45.367382] The buggy address is located 88 bytes inside of [ 45.367382] freed 168-byte region [ffff88801a5c0910, ffff88801a5c09b8) [ 45.368884] [ 45.369125] The buggy address belongs to the physical page: [ 45.369819] page:00000000d8e31e72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a5c0 [ 45.371001] memcg:ffff888019e7fa01 [ 45.371450] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.372129] page_type: 0xffffffff() [ 45.372604] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.373565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e7fa01 [ 45.374515] page dumped because: kasan: bad access detected [ 45.375382] [ 45.375642] Memory state around the buggy address: [ 45.376332] ffff88801a5c0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 45.377338] ffff88801a5c0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 45.378367] >ffff88801a5c0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.379429] ^ [ 45.380370] ffff88801a5c0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 45.381403] ffff88801a5c0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.382428] ================================================================== [ 45.383690] Disabling lock debugging due to kernel taint [ 47.330283] BUG: Bad rss-counter state mm:0000000003c61296 type:MM_FILEPAGES val:33 [ 47.331273] BUG: Bad rss-counter state mm:0000000003c61296 type:MM_ANONPAGES val:22 [ 47.861200] BUG: Bad rss-counter state mm:000000007d43842d type:MM_FILEPAGES val:33 [ 47.862363] BUG: Bad rss-counter state mm:000000007d43842d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54478' (ECDSA) to the list of known hosts. 2023/06/19 11:23:05 fuzzer started 2023/06/19 11:23:05 dialing manager at localhost:44161 2023/06/19 11:23:05 checking machine... 2023/06/19 11:23:05 checking revisions... [ 48.577523] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:05 testing simple program... [ 48.625445] cgroup: Unknown subsys name 'net' [ 48.660686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=ffffffff814c8421 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86605973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801bc72b30 RIP=ffffffff814c0388 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 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=00007ffce84d7fb8 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=00007f5d0244851000005608fce89790 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=1ffffffff0bb22c6 RBX=ffffffff85d91630 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffffffff85d91630 RSP=ffff88801583f740 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffffffff85d91630 R14=ffffffff85d91630 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fc376c8b900 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=00007fc3772430b0 CR3=000000000ed32000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000