syzkaller login: [ 40.118413] BUG: Bad rss-counter state mm:0000000099d4e40a type:MM_FILEPAGES val:33 [ 40.119433] BUG: Bad rss-counter state mm:0000000099d4e40a type:MM_ANONPAGES val:22 [ 40.278024] ================================================================== [ 40.278941] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.279877] Read of size 8 at addr ffff88800f8776b0 by task sshd/218 [ 40.280651] [ 40.280870] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.281982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.282943] Call Trace: [ 40.283262] [ 40.283546] dump_stack_lvl+0x91/0xf0 [ 40.284052] print_report+0xcc/0x620 [ 40.284535] ? __virt_addr_valid+0x102/0x340 [ 40.285079] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.285712] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.286330] kasan_report+0xbe/0xf0 [ 40.286810] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.287439] vma_interval_tree_remove+0xc75/0xec0 [ 40.288039] vma_prepare+0xc54/0x11a0 [ 40.288516] __split_vma+0x5af/0x950 [ 40.288984] ? __pfx___split_vma+0x10/0x10 [ 40.289512] ? find_held_lock+0x2c/0x110 [ 40.290033] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.290599] ? lock_is_held_type+0x9f/0x120 [ 40.291147] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.291762] ? mtree_range_walk+0x632/0x900 [ 40.292314] ? mas_walk+0x5c7/0x7c0 [ 40.292795] do_vmi_munmap+0x1f1/0x2b0 [ 40.293307] mmap_region+0x1f9/0x2660 [ 40.293791] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.294300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.295010] ? __pfx_lock_acquire+0x10/0x10 [ 40.295544] ? __pfx_mmap_region+0x10/0x10 [ 40.296080] ? security_mmap_addr+0x7d/0xa0 [ 40.296615] ? get_unmapped_area+0x1f5/0x3f0 [ 40.297178] do_mmap+0x854/0xf00 [ 40.297617] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.298110] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.298670] ksys_mmap_pgoff+0x3af/0x500 [ 40.299189] do_syscall_64+0x3f/0x90 [ 40.299669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.300317] RIP: 0033:0x7f5ce4469d82 [ 40.300779] 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 [ 40.302945] RSP: 002b:00007ffcec25a438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.303851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ce4469d82 [ 40.304705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ce38a3000 [ 40.305564] RBP: 00007f5ce38a3000 R08: 0000000000000009 R09: 0000000000001000 [ 40.306415] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639ebf3aec0 [ 40.307271] R13: 00007ffcec25a450 R14: 00007ffcec25a480 R15: 00007ffcec25a7e0 [ 40.308129] [ 40.308423] [ 40.308640] Allocated by task 211: [ 40.309078] kasan_save_stack+0x22/0x50 [ 40.309612] kasan_set_track+0x25/0x30 [ 40.310116] __kasan_slab_alloc+0x59/0x70 [ 40.310638] kmem_cache_alloc+0x16b/0x370 [ 40.311154] vm_area_dup+0x20/0x160 [ 40.311617] __split_vma+0x170/0x950 [ 40.312085] split_vma+0xc6/0x110 [ 40.312534] mprotect_fixup+0x8d2/0xb30 [ 40.313045] do_mprotect_pkey+0x87e/0xd40 [ 40.313585] __x64_sys_mprotect+0x78/0xc0 [ 40.314111] do_syscall_64+0x3f/0x90 [ 40.314582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.315220] [ 40.315440] Freed by task 211: [ 40.315838] kasan_save_stack+0x22/0x50 [ 40.316341] kasan_set_track+0x25/0x30 [ 40.316832] kasan_save_free_info+0x2b/0x50 [ 40.317369] __kasan_slab_free+0x10a/0x190 [ 40.317901] kmem_cache_free+0x10d/0x4d0 [ 40.318406] rcu_core+0x8c8/0x2860 [ 40.318852] __do_softirq+0x1b7/0x7d4 [ 40.319331] [ 40.319548] Last potentially related work creation: [ 40.320124] kasan_save_stack+0x22/0x50 [ 40.320626] __kasan_record_aux_stack+0x8e/0xa0 [ 40.321214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.321859] remove_vma+0x139/0x170 [ 40.322311] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.322927] do_vmi_munmap+0x1f1/0x2b0 [ 40.323427] __vm_munmap+0x138/0x3a0 [ 40.323892] __x64_sys_munmap+0x59/0x80 [ 40.324517] do_syscall_64+0x3f/0x90 [ 40.325101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.325766] [ 40.325985] The buggy address belongs to the object at ffff88800f877658 [ 40.325985] which belongs to the cache vm_area_struct of size 168 [ 40.327462] The buggy address is located 88 bytes inside of [ 40.327462] freed 168-byte region [ffff88800f877658, ffff88800f877700) [ 40.328851] [ 40.329069] The buggy address belongs to the physical page: [ 40.329748] page:000000009780e5c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf877 [ 40.330824] memcg:ffff88801a212e01 [ 40.331247] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.331887] page_type: 0xffffffff() [ 40.332337] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.333257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a212e01 [ 40.334156] page dumped because: kasan: bad access detected [ 40.334815] [ 40.335033] Memory state around the buggy address: [ 40.335604] ffff88800f877580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.336462] ffff88800f877600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 40.337312] >ffff88800f877680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.338169] ^ [ 40.338759] ffff88800f877700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.339621] ffff88800f877780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.340470] ================================================================== [ 40.341468] Disabling lock debugging due to kernel taint [ 42.132048] BUG: Bad rss-counter state mm:00000000a677b79e type:MM_FILEPAGES val:33 [ 42.133157] BUG: Bad rss-counter state mm:00000000a677b79e type:MM_ANONPAGES val:22 [ 42.566549] BUG: Bad rss-counter state mm:000000002d2dbb9e type:MM_FILEPAGES val:33 [ 42.567456] BUG: Bad rss-counter state mm:000000002d2dbb9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47930' (ECDSA) to the list of known hosts. 2023/06/19 14:37:23 fuzzer started 2023/06/19 14:37:23 dialing manager at localhost:44161 2023/06/19 14:37:23 checking machine... 2023/06/19 14:37:23 checking revisions... [ 43.307550] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:37:23 testing simple program... [ 43.351663] cgroup: Unknown subsys name 'net' [ 43.389366] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:37:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019e57f40 RCX=0000000000000001 RDX=1ffff110033caea5 RSI=ffff888019e57f18 RDI=ffff888019e57528 RBP=ffff888019e57f48 RSP=ffff888019e574b0 R8 =0000000000000001 R9 =ffff888019e57560 R10=0000000000038001 R11=000000000008abed R12=ffff888019e57580 R13=ffff888019e57568 R14=ffff888019e57f18 R15=ffff888019e57520 RIP=ffffffff81131c83 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 00007ff58abf9900 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=00007ff58b1b0618 CR3=000000001ca1e000 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=563412feff00545000000000000080fe 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fdc40ff7450 CR3=000000000c5f6000 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=135f04d4f9ad11846947017e319adc28 XMM02=000000000011d678ec2efd57dc4c00df XMM03=000000000012401894ca7e4abc8baca7 XMM04=b6e02285009384d700000000000ae988 XMM05=0beff35f1d1c44750000000000134aa0 XMM06=bdf2e299e47b49d500000000001337d0 XMM07=e042d86d42eb936e00000000001242f0 XMM08=94ca7e4abc8baca7000000000011d6d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000