syzkaller login: [ 31.228905] BUG: Bad rss-counter state mm:0000000044b0e6ea type:MM_FILEPAGES val:33 [ 31.230091] BUG: Bad rss-counter state mm:0000000044b0e6ea type:MM_ANONPAGES val:22 [ 31.271079] ================================================================== [ 31.272034] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.272969] Read of size 8 at addr ffff88801a402a50 by task sshd/219 [ 31.273870] [ 31.274087] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.274944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.275952] Call Trace: [ 31.276275] [ 31.276559] dump_stack_lvl+0x91/0xf0 [ 31.277054] print_report+0xcc/0x620 [ 31.277540] ? __virt_addr_valid+0x102/0x340 [ 31.278097] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278717] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279343] kasan_report+0xbe/0xf0 [ 31.279832] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280451] vma_interval_tree_remove+0xc75/0xec0 [ 31.281082] vma_prepare+0xc54/0x11a0 [ 31.281564] __split_vma+0x5af/0x950 [ 31.282037] ? __pfx___split_vma+0x10/0x10 [ 31.282574] ? find_held_lock+0x2c/0x110 [ 31.283097] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.283683] ? lock_is_held_type+0x9f/0x120 [ 31.284236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.284847] ? mtree_range_walk+0x632/0x900 [ 31.285400] ? mas_walk+0x5c7/0x7c0 [ 31.285876] do_vmi_munmap+0x1f1/0x2b0 [ 31.286373] mmap_region+0x1f9/0x2660 [ 31.286853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287369] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288140] ? __pfx_lock_acquire+0x10/0x10 [ 31.288681] ? __pfx_mmap_region+0x10/0x10 [ 31.289227] ? security_mmap_addr+0x7d/0xa0 [ 31.289781] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290340] do_mmap+0x854/0xf00 [ 31.290785] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.291861] ksys_mmap_pgoff+0x3af/0x500 [ 31.292374] do_syscall_64+0x3f/0x90 [ 31.292865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293515] RIP: 0033:0x7f2ba330ed82 [ 31.293980] 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 [ 31.296124] RSP: 002b:00007ffe9e311168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297034] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ba330ed82 [ 31.297896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ba2748000 [ 31.298742] RBP: 00007f2ba2748000 R08: 0000000000000009 R09: 0000000000001000 [ 31.299615] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631c3c29ec0 [ 31.300459] R13: 00007ffe9e311180 R14: 00007ffe9e3111b0 R15: 00007ffe9e311510 [ 31.301317] [ 31.301666] [ 31.301932] Allocated by task 212: [ 31.302394] kasan_save_stack+0x22/0x50 [ 31.302904] kasan_set_track+0x25/0x30 [ 31.303420] __kasan_slab_alloc+0x59/0x70 [ 31.303948] kmem_cache_alloc+0x16b/0x370 [ 31.304472] vm_area_dup+0x20/0x160 [ 31.304937] __split_vma+0x170/0x950 [ 31.305411] split_vma+0xc6/0x110 [ 31.305858] mprotect_fixup+0x8d2/0xb30 [ 31.306369] do_mprotect_pkey+0x87e/0xd40 [ 31.306930] __x64_sys_mprotect+0x78/0xc0 [ 31.307491] do_syscall_64+0x3f/0x90 [ 31.307979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308641] [ 31.308860] Freed by task 212: [ 31.309252] kasan_save_stack+0x22/0x50 [ 31.309772] kasan_set_track+0x25/0x30 [ 31.310270] kasan_save_free_info+0x2b/0x50 [ 31.310817] __kasan_slab_free+0x10a/0x190 [ 31.311370] kmem_cache_free+0x10d/0x4d0 [ 31.311899] rcu_core+0x8c8/0x2860 [ 31.312371] __do_softirq+0x1b7/0x7d4 [ 31.312857] [ 31.313071] Last potentially related work creation: [ 31.313658] kasan_save_stack+0x22/0x50 [ 31.314163] __kasan_record_aux_stack+0x8e/0xa0 [ 31.314744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.315399] remove_vma+0x139/0x170 [ 31.315877] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.316443] do_vmi_munmap+0x1f1/0x2b0 [ 31.316936] __vm_munmap+0x138/0x3a0 [ 31.317412] __x64_sys_munmap+0x59/0x80 [ 31.317914] do_syscall_64+0x3f/0x90 [ 31.318403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319057] [ 31.319276] Second to last potentially related work creation: [ 31.319997] kasan_save_stack+0x22/0x50 [ 31.320504] __kasan_record_aux_stack+0x8e/0xa0 [ 31.321082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.321734] remove_vma+0x139/0x170 [ 31.322324] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.322877] do_vmi_munmap+0x1f1/0x2b0 [ 31.323359] mmap_region+0x1f9/0x2660 [ 31.323844] do_mmap+0x854/0xf00 [ 31.324272] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.324751] ksys_mmap_pgoff+0x3af/0x500 [ 31.325253] do_syscall_64+0x3f/0x90 [ 31.325743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.326375] [ 31.326588] The buggy address belongs to the object at ffff88801a4029f8 [ 31.326588] which belongs to the cache vm_area_struct of size 168 [ 31.328041] The buggy address is located 88 bytes inside of [ 31.328041] freed 168-byte region [ffff88801a4029f8, ffff88801a402aa0) [ 31.329443] [ 31.329657] The buggy address belongs to the physical page: [ 31.330305] page:00000000273e1e03 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801a402d98 pfn:0x1a402 [ 31.331531] memcg:ffff88800f041601 [ 31.331949] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.332588] page_type: 0xffffffff() [ 31.333029] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a0e40 dead000000000002 [ 31.333934] raw: ffff88801a402d98 000000008011000d 00000001ffffffff ffff88800f041601 [ 31.334827] page dumped because: kasan: bad access detected [ 31.335481] [ 31.335698] Memory state around the buggy address: [ 31.336271] ffff88801a402900: fc fc fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.337116] ffff88801a402980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.337959] >ffff88801a402a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.338795] ^ [ 31.339498] ffff88801a402a80: fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb [ 31.340333] ffff88801a402b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.341164] ================================================================== [ 31.342543] Disabling lock debugging due to kernel taint [ 33.194519] BUG: Bad rss-counter state mm:000000000c50a0f3 type:MM_FILEPAGES val:33 [ 33.196082] BUG: Bad rss-counter state mm:000000000c50a0f3 type:MM_ANONPAGES val:22 [ 33.757618] BUG: Bad rss-counter state mm:0000000040d73dcd type:MM_FILEPAGES val:33 [ 33.758749] BUG: Bad rss-counter state mm:0000000040d73dcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21242' (ECDSA) to the list of known hosts. 2023/06/21 06:09:38 fuzzer started 2023/06/21 06:09:39 dialing manager at localhost:36067 2023/06/21 06:09:39 checking machine... 2023/06/21 06:09:39 checking revisions... [ 34.341787] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:09:39 testing simple program... [ 34.391300] cgroup: Unknown subsys name 'net' [ 34.442232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800a230000 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800a231b00 RBP=ffff88800a231b00 RSP=ffff888016967ca0 R8 =0000000000000000 R9 =ffffed1001446360 R10=ffff88800a231b03 R11=00000000000b6a61 R12=ffff88800dc3a000 R13=ffff88800dc3a008 R14=ffff88800dc3a020 R15=ffff88800dc3a080 RIP=ffffffff812e058c 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 00007fd341488900 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=00007ff4874c6e10 CR3=000000000e520000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed100d9e13b8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8562be48 R15=0000000000000000 RIP=ffffffff812d9031 RFL=00000086 [--S--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 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=00007ffe5a20bc48 CR3=0000000005482000 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=00007f44c12a4510000055fe7d4c8790 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