syzkaller login: [ 31.529802] BUG: Bad rss-counter state mm:00000000adc9857f type:MM_FILEPAGES val:33 [ 31.530821] BUG: Bad rss-counter state mm:00000000adc9857f type:MM_ANONPAGES val:22 [ 31.652417] ================================================================== [ 31.653152] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.653866] Read of size 8 at addr ffff88800ea49968 by task sshd/219 [ 31.654429] [ 31.654635] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.655279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.656366] Call Trace: [ 31.656613] [ 31.656817] dump_stack_lvl+0x91/0xf0 [ 31.657182] print_report+0xcc/0x620 [ 31.657565] ? __virt_addr_valid+0x102/0x340 [ 31.657974] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658892] kasan_report+0xbe/0xf0 [ 31.659252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659722] vma_interval_tree_remove+0xc75/0xec0 [ 31.660181] vma_prepare+0xc54/0x11a0 [ 31.660542] __split_vma+0x5af/0x950 [ 31.660893] ? __pfx___split_vma+0x10/0x10 [ 31.661288] ? find_held_lock+0x2c/0x110 [ 31.661702] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.662133] ? lock_is_held_type+0x9f/0x120 [ 31.662543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.663002] ? mtree_range_walk+0x632/0x900 [ 31.663416] ? mas_walk+0x5c7/0x7c0 [ 31.663775] do_vmi_munmap+0x1f1/0x2b0 [ 31.664166] mmap_region+0x1f9/0x2660 [ 31.664523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.664915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.665432] ? __pfx_lock_acquire+0x10/0x10 [ 31.665830] ? __pfx_mmap_region+0x10/0x10 [ 31.666226] ? security_mmap_addr+0x7d/0xa0 [ 31.666663] ? get_unmapped_area+0x1f5/0x3f0 [ 31.667077] do_mmap+0x854/0xf00 [ 31.667419] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.667797] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.668222] ksys_mmap_pgoff+0x3af/0x500 [ 31.668598] do_syscall_64+0x3f/0x90 [ 31.668954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.669433] RIP: 0033:0x7f05ee8bcd82 [ 31.669764] 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 [ 31.671342] RSP: 002b:00007ffd86b3b438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.672071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05ee8bcd82 [ 31.672687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05edcf6000 [ 31.673307] RBP: 00007f05edcf6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.673946] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570e0191f70 [ 31.674615] R13: 00007ffd86b3b450 R14: 00007ffd86b3b480 R15: 00007ffd86b3b7e0 [ 31.675230] [ 31.675438] [ 31.675617] Allocated by task 212: [ 31.675976] kasan_save_stack+0x22/0x50 [ 31.676347] kasan_set_track+0x25/0x30 [ 31.676709] __kasan_slab_alloc+0x59/0x70 [ 31.677093] kmem_cache_alloc+0x16b/0x370 [ 31.677483] vm_area_dup+0x20/0x160 [ 31.677816] __split_vma+0x170/0x950 [ 31.678146] split_vma+0xc6/0x110 [ 31.678471] mprotect_fixup+0x8d2/0xb30 [ 31.678834] do_mprotect_pkey+0x87e/0xd40 [ 31.679232] __x64_sys_mprotect+0x78/0xc0 [ 31.679641] do_syscall_64+0x3f/0x90 [ 31.680004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.680469] [ 31.680650] Freed by task 212: [ 31.680951] kasan_save_stack+0x22/0x50 [ 31.681322] kasan_set_track+0x25/0x30 [ 31.681678] kasan_save_free_info+0x2b/0x50 [ 31.682067] __kasan_slab_free+0x10a/0x190 [ 31.682459] kmem_cache_free+0x10d/0x4d0 [ 31.682828] rcu_core+0x8c8/0x2860 [ 31.683152] __do_softirq+0x1b7/0x7d4 [ 31.683511] [ 31.683689] Last potentially related work creation: [ 31.684129] kasan_save_stack+0x22/0x50 [ 31.684494] __kasan_record_aux_stack+0x8e/0xa0 [ 31.684967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.685442] remove_vma+0x139/0x170 [ 31.685780] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.686194] do_vmi_munmap+0x1f1/0x2b0 [ 31.686546] __vm_munmap+0x138/0x3a0 [ 31.686892] __x64_sys_munmap+0x59/0x80 [ 31.687245] do_syscall_64+0x3f/0x90 [ 31.687588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.688093] [ 31.688252] The buggy address belongs to the object at ffff88800ea49910 [ 31.688252] which belongs to the cache vm_area_struct of size 168 [ 31.689378] The buggy address is located 88 bytes inside of [ 31.689378] freed 168-byte region [ffff88800ea49910, ffff88800ea499b8) [ 31.690525] [ 31.690691] The buggy address belongs to the physical page: [ 31.691188] page:00000000202009d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea49 [ 31.692001] memcg:ffff888019ec4c01 [ 31.692314] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.692827] page_type: 0xffffffff() [ 31.693165] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.693858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec4c01 [ 31.694527] page dumped because: kasan: bad access detected [ 31.695000] [ 31.695162] Memory state around the buggy address: [ 31.695699] ffff88800ea49800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.696400] ffff88800ea49880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.697158] >ffff88800ea49900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.697832] ^ [ 31.698409] ffff88800ea49980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.699061] ffff88800ea49a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.699688] ================================================================== [ 31.700408] Disabling lock debugging due to kernel taint [ 33.288063] BUG: Bad rss-counter state mm:00000000ec7cbc11 type:MM_FILEPAGES val:33 [ 33.288819] BUG: Bad rss-counter state mm:00000000ec7cbc11 type:MM_ANONPAGES val:22 [ 33.659528] BUG: Bad rss-counter state mm:0000000057d310a1 type:MM_FILEPAGES val:33 [ 33.660303] BUG: Bad rss-counter state mm:0000000057d310a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63316' (ECDSA) to the list of known hosts. 2023/06/20 09:12:48 fuzzer started 2023/06/20 09:12:48 dialing manager at localhost:44161 2023/06/20 09:12:48 checking machine... 2023/06/20 09:12:48 checking revisions... [ 34.282012] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:12:48 testing simple program... [ 34.332157] cgroup: Unknown subsys name 'net' [ 34.387385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:12:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88807ffd7010 RCX=0000000000000100 RDX=ffff888008d70000 RSI=0000000000000008 RDI=0000000000000000 RBP=000000000f709a00 RSP=ffff888008d7fc38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000128 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff888013b51c00 RIP=ffffffff814c03b0 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 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=00007f32c9dc2008 CR3=000000000cbea000 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=02026eb40ac7149dae49ce8edd8f7c29 XMM02=ec2efd57dc4c00df000000000011dd18 XMM03=8b0a40cac126e51e000000000011dde8 XMM04=44434f438766539200000000000ae988 XMM05=841ac9445a3f0fc50000000000135048 XMM06=806171799158d96700000000001340e8 XMM07=e042d86d42eb936e00000000001248d0 XMM08=8b0a40cac126e51e000000000011dde8 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=00007ffeab1fe000 CR3=000000000cab4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000