syzkaller login: [ 33.237074] BUG: Bad rss-counter state mm:00000000c72ec9bc type:MM_FILEPAGES val:33 [ 33.238431] BUG: Bad rss-counter state mm:00000000c72ec9bc type:MM_ANONPAGES val:22 [ 33.279641] ================================================================== [ 33.280567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.281545] Read of size 8 at addr ffff88800e661310 by task sshd/221 [ 33.282399] [ 33.282621] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.283488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.284492] Call Trace: [ 33.284825] [ 33.285115] dump_stack_lvl+0x91/0xf0 [ 33.285613] print_report+0xcc/0x620 [ 33.286115] ? __virt_addr_valid+0x102/0x340 [ 33.286668] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.287297] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.287925] kasan_report+0xbe/0xf0 [ 33.288407] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.289058] vma_interval_tree_remove+0xc75/0xec0 [ 33.289673] vma_prepare+0xc54/0x11a0 [ 33.290165] __split_vma+0x5af/0x950 [ 33.290650] ? __pfx___split_vma+0x10/0x10 [ 33.291185] ? find_held_lock+0x2c/0x110 [ 33.291707] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.292278] ? lock_is_held_type+0x9f/0x120 [ 33.292853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.293492] ? mtree_range_walk+0x632/0x900 [ 33.294078] ? mas_walk+0x5c7/0x7c0 [ 33.294576] do_vmi_munmap+0x1f1/0x2b0 [ 33.295093] mmap_region+0x1f9/0x2660 [ 33.295589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.296106] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.296826] ? __pfx_lock_acquire+0x10/0x10 [ 33.297366] ? __pfx_mmap_region+0x10/0x10 [ 33.297896] ? security_mmap_addr+0x7d/0xa0 [ 33.298452] ? get_unmapped_area+0x1f5/0x3f0 [ 33.299000] do_mmap+0x854/0xf00 [ 33.299443] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.299940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.300503] ksys_mmap_pgoff+0x3af/0x500 [ 33.301009] do_syscall_64+0x3f/0x90 [ 33.301482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.302138] RIP: 0033:0x7f430cd25d82 [ 33.302591] 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 [ 33.304695] RSP: 002b:00007fff4fb775e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.305607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f430cd25d82 [ 33.306487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f430c15f000 [ 33.307335] RBP: 00007f430c15f000 R08: 0000000000000009 R09: 0000000000001000 [ 33.308197] R10: 0000000000000812 R11: 0000000000000206 R12: 000055669223fec0 [ 33.309049] R13: 00007fff4fb77600 R14: 00007fff4fb77630 R15: 00007fff4fb77990 [ 33.309903] [ 33.310201] [ 33.310417] Allocated by task 214: [ 33.310847] kasan_save_stack+0x22/0x50 [ 33.311357] kasan_set_track+0x25/0x30 [ 33.311847] __kasan_slab_alloc+0x59/0x70 [ 33.312380] kmem_cache_alloc+0x16b/0x370 [ 33.312893] vm_area_dup+0x20/0x160 [ 33.313340] __split_vma+0x170/0x950 [ 33.313827] split_vma+0xc6/0x110 [ 33.314285] mprotect_fixup+0x8d2/0xb30 [ 33.314784] do_mprotect_pkey+0x87e/0xd40 [ 33.315298] __x64_sys_mprotect+0x78/0xc0 [ 33.315815] do_syscall_64+0x3f/0x90 [ 33.316285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.316926] [ 33.317142] Freed by task 214: [ 33.317535] kasan_save_stack+0x22/0x50 [ 33.318043] kasan_set_track+0x25/0x30 [ 33.318550] kasan_save_free_info+0x2b/0x50 [ 33.319082] __kasan_slab_free+0x10a/0x190 [ 33.319620] kmem_cache_free+0x10d/0x4d0 [ 33.320123] rcu_core+0x8c8/0x2860 [ 33.320571] __do_softirq+0x1b7/0x7d4 [ 33.321047] [ 33.321263] Last potentially related work creation: [ 33.321849] kasan_save_stack+0x22/0x50 [ 33.322368] __kasan_record_aux_stack+0x8e/0xa0 [ 33.322943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.323586] remove_vma+0x139/0x170 [ 33.324041] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.324601] do_vmi_munmap+0x1f1/0x2b0 [ 33.325086] __vm_munmap+0x138/0x3a0 [ 33.325550] __x64_sys_munmap+0x59/0x80 [ 33.326057] do_syscall_64+0x3f/0x90 [ 33.326530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.327170] [ 33.327389] The buggy address belongs to the object at ffff88800e6612b8 [ 33.327389] which belongs to the cache vm_area_struct of size 168 [ 33.328858] The buggy address is located 88 bytes inside of [ 33.328858] freed 168-byte region [ffff88800e6612b8, ffff88800e661360) [ 33.330255] [ 33.330474] The buggy address belongs to the physical page: [ 33.331138] page:00000000a9575dc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe661 [ 33.332209] memcg:ffff888015fdf301 [ 33.332638] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.333279] page_type: 0xffffffff() [ 33.333735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.334681] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015fdf301 [ 33.335582] page dumped because: kasan: bad access detected [ 33.336243] [ 33.336461] Memory state around the buggy address: [ 33.337039] ffff88800e661200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.337892] ffff88800e661280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.338743] >ffff88800e661300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.339589] ^ [ 33.340059] ffff88800e661380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.340909] ffff88800e661400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.341751] ================================================================== [ 33.342754] Disabling lock debugging due to kernel taint [ 35.147458] BUG: Bad rss-counter state mm:000000005f939a40 type:MM_FILEPAGES val:33 [ 35.148457] BUG: Bad rss-counter state mm:000000005f939a40 type:MM_ANONPAGES val:22 [ 35.697842] BUG: Bad rss-counter state mm:000000005e1087ae type:MM_FILEPAGES val:33 [ 35.699103] BUG: Bad rss-counter state mm:000000005e1087ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3789' (ECDSA) to the list of known hosts. 2023/06/19 22:03:58 fuzzer started 2023/06/19 22:03:58 dialing manager at localhost:44161 2023/06/19 22:03:58 checking machine... 2023/06/19 22:03:58 checking revisions... [ 36.338996] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:03:58 testing simple program... [ 36.395403] cgroup: Unknown subsys name 'net' [ 36.449990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffffffff818aca92 RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000023839 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff88801a119b40 R15=ffff88806ce09a50 RIP=ffffffff8113062c 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 00007fb70b447900 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=00007fb70b9fc650 CR3=0000000016234000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff8493c2c0 RCX=0000000000000000 RDX=ffff8880147e0000 RSI=0000000000000008 RDI=ffffea000060e380 RBP=ffffea000060e380 RSP=ffff8880147dfa50 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff88801657b660 R13=ffffffff81b291d0 R14=0000000000800000 R15=000000000006f000 RIP=ffffffff8180fd24 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffa04401900 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=00007ffa0385a890 CR3=000000000d816000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=40d68cff131b02c500000000000ae988 XMM05=1330ed11a67316040000000000134850 XMM06=c291bd5c70af25b90000000000133640 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000