syzkaller login: [ 28.914356] BUG: Bad rss-counter state mm:000000007dfdbb8d type:MM_FILEPAGES val:33 [ 28.915067] BUG: Bad rss-counter state mm:000000007dfdbb8d type:MM_ANONPAGES val:22 [ 29.047994] ================================================================== [ 29.048727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.049460] Read of size 8 at addr ffff88800ed90968 by task sshd/220 [ 29.050080] [ 29.050253] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.050950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.051738] Call Trace: [ 29.051995] [ 29.052224] dump_stack_lvl+0x91/0xf0 [ 29.052622] print_report+0xcc/0x620 [ 29.053030] ? __virt_addr_valid+0x102/0x340 [ 29.053475] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.053963] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.054440] kasan_report+0xbe/0xf0 [ 29.054803] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.055278] vma_interval_tree_remove+0xc75/0xec0 [ 29.055765] vma_prepare+0xc54/0x11a0 [ 29.056149] __split_vma+0x5af/0x950 [ 29.056523] ? __pfx___split_vma+0x10/0x10 [ 29.056930] ? find_held_lock+0x2c/0x110 [ 29.057319] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.057748] ? lock_is_held_type+0x9f/0x120 [ 29.058143] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.058583] ? mtree_range_walk+0x632/0x900 [ 29.058996] ? mas_walk+0x5c7/0x7c0 [ 29.059358] do_vmi_munmap+0x1f1/0x2b0 [ 29.059726] mmap_region+0x1f9/0x2660 [ 29.060081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.060456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.060994] ? __pfx_lock_acquire+0x10/0x10 [ 29.061390] ? __pfx_mmap_region+0x10/0x10 [ 29.061774] ? security_mmap_addr+0x7d/0xa0 [ 29.062167] ? get_unmapped_area+0x1f5/0x3f0 [ 29.062569] do_mmap+0x854/0xf00 [ 29.062889] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.063254] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.063668] ksys_mmap_pgoff+0x3af/0x500 [ 29.064035] do_syscall_64+0x3f/0x90 [ 29.064383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.064867] RIP: 0033:0x7f2d3313dd82 [ 29.065203] 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 [ 29.066839] RSP: 002b:00007ffeb824fed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.067497] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d3313dd82 [ 29.068127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d32577000 [ 29.068762] RBP: 00007f2d32577000 R08: 0000000000000009 R09: 0000000000001000 [ 29.069385] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f093035ec0 [ 29.070009] R13: 00007ffeb824fef0 R14: 00007ffeb824ff20 R15: 00007ffeb8250280 [ 29.070649] [ 29.070859] [ 29.071015] Allocated by task 212: [ 29.071337] kasan_save_stack+0x22/0x50 [ 29.071705] kasan_set_track+0x25/0x30 [ 29.072069] __kasan_slab_alloc+0x59/0x70 [ 29.072471] kmem_cache_alloc+0x16b/0x370 [ 29.072887] vm_area_dup+0x20/0x160 [ 29.073242] __split_vma+0x170/0x950 [ 29.073577] split_vma+0xc6/0x110 [ 29.073898] mprotect_fixup+0x8d2/0xb30 [ 29.074267] do_mprotect_pkey+0x87e/0xd40 [ 29.074660] __x64_sys_mprotect+0x78/0xc0 [ 29.075036] do_syscall_64+0x3f/0x90 [ 29.075388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.075877] [ 29.076031] Freed by task 212: [ 29.076323] kasan_save_stack+0x22/0x50 [ 29.076697] kasan_set_track+0x25/0x30 [ 29.077062] kasan_save_free_info+0x2b/0x50 [ 29.077459] __kasan_slab_free+0x10a/0x190 [ 29.077880] kmem_cache_free+0x10d/0x4d0 [ 29.078272] rcu_core+0x8c8/0x2860 [ 29.078593] __do_softirq+0x1b7/0x7d4 [ 29.078946] [ 29.079102] Last potentially related work creation: [ 29.079533] kasan_save_stack+0x22/0x50 [ 29.079908] __kasan_record_aux_stack+0x8e/0xa0 [ 29.080343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.080855] remove_vma+0x139/0x170 [ 29.081195] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.081639] do_vmi_munmap+0x1f1/0x2b0 [ 29.082017] __vm_munmap+0x138/0x3a0 [ 29.082378] __x64_sys_munmap+0x59/0x80 [ 29.082773] do_syscall_64+0x3f/0x90 [ 29.083130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.083631] [ 29.083870] The buggy address belongs to the object at ffff88800ed90910 [ 29.083870] which belongs to the cache vm_area_struct of size 168 [ 29.085008] The buggy address is located 88 bytes inside of [ 29.085008] freed 168-byte region [ffff88800ed90910, ffff88800ed909b8) [ 29.086028] [ 29.086187] The buggy address belongs to the physical page: [ 29.086669] page:000000004bb291cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed90 [ 29.087503] memcg:ffff88801010a201 [ 29.087834] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.088327] page_type: 0xffffffff() [ 29.088667] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0740 dead000000000004 [ 29.089380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801010a201 [ 29.090065] page dumped because: kasan: bad access detected [ 29.090574] [ 29.090738] Memory state around the buggy address: [ 29.091189] ffff88800ed90800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.091850] ffff88800ed90880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.092475] >ffff88800ed90900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.093131] ^ [ 29.093703] ffff88800ed90980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.094350] ffff88800ed90a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.094992] ================================================================== [ 29.095722] Disabling lock debugging due to kernel taint [ 31.198939] BUG: Bad rss-counter state mm:00000000d4e0b132 type:MM_FILEPAGES val:33 [ 31.200220] BUG: Bad rss-counter state mm:00000000d4e0b132 type:MM_ANONPAGES val:22 [ 31.768957] BUG: Bad rss-counter state mm:000000002cb1e871 type:MM_FILEPAGES val:33 [ 31.770199] BUG: Bad rss-counter state mm:000000002cb1e871 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40614' (ECDSA) to the list of known hosts. 2023/06/21 10:44:34 fuzzer started 2023/06/21 10:44:34 dialing manager at localhost:36067 2023/06/21 10:44:34 checking machine... 2023/06/21 10:44:34 checking revisions... [ 32.393535] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:44:34 testing simple program... [ 32.430462] cgroup: Unknown subsys name 'net' [ 32.501650] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:34 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=00007fc190a0e540 CR3=000000000c486000 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=3f425decf17a178e5d453de5ff8798b9 XMM02=ec2efd57dc4c00df000000000011d9b8 XMM03=02c13a581b9d46a8000000000011da88 XMM04=07f6915126d2398100000000000ae988 XMM05=a908626b03eba4130000000000132d68 XMM06=4fda316b135da52b0000000000131e08 XMM07=e042d86d42eb936e0000000000121c78 XMM08=02c13a581b9d46a8000000000011da88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff8118ddc3 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 00007fe397f54900 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=00007fe39850b618 CR3=000000000eb9a000 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=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