syzkaller login: [ 28.820430] BUG: Bad rss-counter state mm:00000000c64369a6 type:MM_FILEPAGES val:33 [ 28.822406] BUG: Bad rss-counter state mm:00000000c64369a6 type:MM_ANONPAGES val:22 [ 28.974768] ================================================================== [ 28.975867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.976976] Read of size 8 at addr ffff888009b715c8 by task sshd/219 [ 28.977891] [ 28.978154] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.979318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.980508] Call Trace: [ 28.980883] [ 28.981219] dump_stack_lvl+0x91/0xf0 [ 28.981808] print_report+0xcc/0x620 [ 28.982388] ? __virt_addr_valid+0x102/0x340 [ 28.983082] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.983834] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.984352] kasan_report+0xbe/0xf0 [ 28.984756] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.985309] vma_interval_tree_remove+0xc75/0xec0 [ 28.985822] vma_prepare+0xc54/0x11a0 [ 28.986227] __split_vma+0x5af/0x950 [ 28.986622] ? __pfx___split_vma+0x10/0x10 [ 28.987069] ? find_held_lock+0x2c/0x110 [ 28.987536] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.988044] ? lock_is_held_type+0x9f/0x120 [ 28.988499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.989001] ? mtree_range_walk+0x632/0x900 [ 28.989466] ? mas_walk+0x5c7/0x7c0 [ 28.989861] do_vmi_munmap+0x1f1/0x2b0 [ 28.990271] mmap_region+0x1f9/0x2660 [ 28.990679] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.991118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.991720] ? __pfx_lock_acquire+0x10/0x10 [ 28.992175] ? __pfx_mmap_region+0x10/0x10 [ 28.992620] ? security_mmap_addr+0x7d/0xa0 [ 28.993067] ? get_unmapped_area+0x1f5/0x3f0 [ 28.993527] do_mmap+0x854/0xf00 [ 28.993905] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.994337] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.994827] ksys_mmap_pgoff+0x3af/0x500 [ 28.995299] do_syscall_64+0x3f/0x90 [ 28.995724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.996307] RIP: 0033:0x7f55dfe42d82 [ 28.996697] 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 [ 28.998529] RSP: 002b:00007fff4ae72c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.999319] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55dfe42d82 [ 29.000064] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55df27c000 [ 29.000810] RBP: 00007f55df27c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.001579] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556efa331ec0 [ 29.002324] R13: 00007fff4ae72c40 R14: 00007fff4ae72c70 R15: 00007fff4ae72fd0 [ 29.003099] [ 29.003357] [ 29.003550] Allocated by task 212: [ 29.003933] kasan_save_stack+0x22/0x50 [ 29.004365] kasan_set_track+0x25/0x30 [ 29.004788] __kasan_slab_alloc+0x59/0x70 [ 29.005235] kmem_cache_alloc+0x16b/0x370 [ 29.005678] vm_area_dup+0x20/0x160 [ 29.006068] __split_vma+0x170/0x950 [ 29.006489] split_vma+0xc6/0x110 [ 29.006894] mprotect_fixup+0x8d2/0xb30 [ 29.007340] do_mprotect_pkey+0x87e/0xd40 [ 29.007794] __x64_sys_mprotect+0x78/0xc0 [ 29.008259] do_syscall_64+0x3f/0x90 [ 29.008662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.009212] [ 29.009395] Freed by task 212: [ 29.009729] kasan_save_stack+0x22/0x50 [ 29.010167] kasan_set_track+0x25/0x30 [ 29.010590] kasan_save_free_info+0x2b/0x50 [ 29.011077] __kasan_slab_free+0x10a/0x190 [ 29.011550] kmem_cache_free+0x10d/0x4d0 [ 29.011996] rcu_core+0x8c8/0x2860 [ 29.012375] __do_softirq+0x1b7/0x7d4 [ 29.012794] [ 29.012981] Last potentially related work creation: [ 29.013491] kasan_save_stack+0x22/0x50 [ 29.013923] __kasan_record_aux_stack+0x8e/0xa0 [ 29.014413] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.014993] remove_vma+0x139/0x170 [ 29.015381] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.015865] do_vmi_munmap+0x1f1/0x2b0 [ 29.016291] __vm_munmap+0x138/0x3a0 [ 29.016699] __x64_sys_munmap+0x59/0x80 [ 29.017117] do_syscall_64+0x3f/0x90 [ 29.017549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.018109] [ 29.018293] The buggy address belongs to the object at ffff888009b71570 [ 29.018293] which belongs to the cache vm_area_struct of size 168 [ 29.019587] The buggy address is located 88 bytes inside of [ 29.019587] freed 168-byte region [ffff888009b71570, ffff888009b71618) [ 29.020901] [ 29.021092] The buggy address belongs to the physical page: [ 29.021711] page:00000000d578307a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9b71 [ 29.022677] memcg:ffff88800eb00d01 [ 29.023082] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.023690] page_type: 0xffffffff() [ 29.024076] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.024880] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb00d01 [ 29.025683] page dumped because: kasan: bad access detected [ 29.026259] [ 29.026456] Memory state around the buggy address: [ 29.026980] ffff888009b71480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.027768] ffff888009b71500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.028525] >ffff888009b71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.029261] ^ [ 29.029832] ffff888009b71600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.030570] ffff888009b71680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.031349] ================================================================== [ 29.032161] Disabling lock debugging due to kernel taint [ 31.008233] BUG: Bad rss-counter state mm:00000000e17aa186 type:MM_FILEPAGES val:33 [ 31.009221] BUG: Bad rss-counter state mm:00000000e17aa186 type:MM_ANONPAGES val:22 [ 31.454873] BUG: Bad rss-counter state mm:000000008c441093 type:MM_FILEPAGES val:33 [ 31.455921] BUG: Bad rss-counter state mm:000000008c441093 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44444' (ECDSA) to the list of known hosts. 2023/06/19 23:47:13 fuzzer started 2023/06/19 23:47:13 dialing manager at localhost:44161 2023/06/19 23:47:13 checking machine... 2023/06/19 23:47:13 checking revisions... [ 32.161287] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:47:13 testing simple program... [ 32.214281] cgroup: Unknown subsys name 'net' [ 32.252065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:47:13 Registers: info registers vcpu 0 RAX=1ffff1100203007f RBX=ffff8880101803f8 RCX=1ffff11001c7e544 RDX=1ffff110018c80f1 RSI=ffffffff87b86f80 RDI=ffff88800c640788 RBP=ffff888010180408 RSP=ffff88801036f688 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800c640788 R13=dffffc0000000000 R14=ffff88800c640768 R15=ffff88800c640720 RIP=ffffffff844cdcb3 RFL=00000046 [---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 00007f598407d900 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=000056363d60d768 CR3=0000000009a84000 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=de09721ab2a387924b4ff4d0d72f198b XMM02=ec2efd57dc4c00df0000000000120170 XMM03=2c05daca15760d160000000000120240 XMM04=958842a0cac1ec6700000000000ae988 XMM05=619ec91d0bf04eca0000000000135260 XMM06=19e9129bd510f23500000000001343a8 XMM07=fb795ef6d65770560000000000124158 XMM08=2c67c8bc2e329bc300000000001201e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007ffeb0e43318 CR3=000000000c732000 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=2033313a37343a3332203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a363833373320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a37343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000