syzkaller login: [ 89.497887] BUG: Bad rss-counter state mm:00000000655c8ba8 type:MM_FILEPAGES val:33 [ 89.498911] BUG: Bad rss-counter state mm:00000000655c8ba8 type:MM_ANONPAGES val:22 [ 89.667318] ================================================================== [ 89.668239] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 89.669189] Read of size 8 at addr ffff888015f88b38 by task sshd/220 [ 89.669991] [ 89.670311] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 89.671345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 89.672333] Call Trace: [ 89.672656] [ 89.672940] dump_stack_lvl+0x91/0xf0 [ 89.673434] print_report+0xcc/0x620 [ 89.673924] ? __virt_addr_valid+0x102/0x340 [ 89.674482] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.675132] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.675825] kasan_report+0xbe/0xf0 [ 89.676317] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.676947] vma_interval_tree_remove+0xc75/0xec0 [ 89.677560] vma_prepare+0xc54/0x11a0 [ 89.678057] __split_vma+0x5af/0x950 [ 89.678611] ? __pfx___split_vma+0x10/0x10 [ 89.679282] ? find_held_lock+0x2c/0x110 [ 89.679907] do_vmi_align_munmap+0x2ba/0x11f0 [ 89.680591] ? lock_is_held_type+0x9f/0x120 [ 89.681252] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 89.681995] ? mtree_range_walk+0x632/0x900 [ 89.682595] ? mas_walk+0x5c7/0x7c0 [ 89.683133] do_vmi_munmap+0x1f1/0x2b0 [ 89.683608] mmap_region+0x1f9/0x2660 [ 89.684064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 89.684548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 89.685220] ? __pfx_lock_acquire+0x10/0x10 [ 89.685721] ? __pfx_mmap_region+0x10/0x10 [ 89.686225] ? security_mmap_addr+0x7d/0xa0 [ 89.686722] ? get_unmapped_area+0x1f5/0x3f0 [ 89.687258] do_mmap+0x854/0xf00 [ 89.687674] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.688141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 89.688677] ksys_mmap_pgoff+0x3af/0x500 [ 89.689155] do_syscall_64+0x3f/0x90 [ 89.689693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.690405] RIP: 0033:0x7f402582bd82 [ 89.690866] 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 [ 89.693296] RSP: 002b:00007ffcaa4b11d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 89.694322] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f402582bd82 [ 89.695300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4024c65000 [ 89.696250] RBP: 00007f4024c65000 R08: 0000000000000009 R09: 0000000000001000 [ 89.697202] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b1abdfd90 [ 89.698150] R13: 00007ffcaa4b11f0 R14: 00007ffcaa4b1220 R15: 00007ffcaa4b1580 [ 89.699120] [ 89.699442] [ 89.699686] Allocated by task 213: [ 89.700166] kasan_save_stack+0x22/0x50 [ 89.700734] kasan_set_track+0x25/0x30 [ 89.701293] __kasan_slab_alloc+0x59/0x70 [ 89.701889] kmem_cache_alloc+0x16b/0x370 [ 89.702475] vm_area_dup+0x20/0x160 [ 89.703016] __split_vma+0x170/0x950 [ 89.703555] split_vma+0xc6/0x110 [ 89.704068] mprotect_fixup+0x8d2/0xb30 [ 89.704571] do_mprotect_pkey+0x87e/0xd40 [ 89.705067] __x64_sys_mprotect+0x78/0xc0 [ 89.705608] do_syscall_64+0x3f/0x90 [ 89.706085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.706741] [ 89.706978] Freed by task 213: [ 89.707384] kasan_save_stack+0x22/0x50 [ 89.707891] kasan_set_track+0x25/0x30 [ 89.708388] kasan_save_free_info+0x2b/0x50 [ 89.708923] __kasan_slab_free+0x10a/0x190 [ 89.709471] kmem_cache_free+0x10d/0x4d0 [ 89.709986] rcu_core+0x8c8/0x2860 [ 89.710438] __do_softirq+0x1b7/0x7d4 [ 89.710929] [ 89.711147] Last potentially related work creation: [ 89.711775] kasan_save_stack+0x22/0x50 [ 89.712356] __kasan_record_aux_stack+0x8e/0xa0 [ 89.712937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.713589] remove_vma+0x139/0x170 [ 89.714040] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.714601] do_vmi_munmap+0x1f1/0x2b0 [ 89.715116] __vm_munmap+0x138/0x3a0 [ 89.715606] __x64_sys_munmap+0x59/0x80 [ 89.716123] do_syscall_64+0x3f/0x90 [ 89.716608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.717254] [ 89.717472] The buggy address belongs to the object at ffff888015f88ae0 [ 89.717472] which belongs to the cache vm_area_struct of size 168 [ 89.718992] The buggy address is located 88 bytes inside of [ 89.718992] freed 168-byte region [ffff888015f88ae0, ffff888015f88b88) [ 89.720427] [ 89.720644] The buggy address belongs to the physical page: [ 89.721325] page:0000000081c98dbd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f88 [ 89.722440] memcg:ffff888015e10901 [ 89.722881] flags: 0x100000000000200(slab|node=0|zone=1) [ 89.723541] page_type: 0xffffffff() [ 89.724070] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 89.725160] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e10901 [ 89.726091] page dumped because: kasan: bad access detected [ 89.726851] [ 89.727099] Memory state around the buggy address: [ 89.727701] ffff888015f88a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 89.728572] ffff888015f88a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 89.729539] >ffff888015f88b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 89.730585] ^ [ 89.731343] ffff888015f88b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 89.732408] ffff888015f88c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 89.733462] ================================================================== [ 89.734576] Disabling lock debugging due to kernel taint [ 91.911591] BUG: Bad rss-counter state mm:000000009dc81dbe type:MM_FILEPAGES val:33 [ 91.912353] BUG: Bad rss-counter state mm:000000009dc81dbe type:MM_ANONPAGES val:22 [ 92.356309] BUG: Bad rss-counter state mm:0000000080ff2a53 type:MM_FILEPAGES val:33 [ 92.357327] BUG: Bad rss-counter state mm:0000000080ff2a53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37869' (ECDSA) to the list of known hosts. 2023/06/19 22:31:47 fuzzer started 2023/06/19 22:31:47 dialing manager at localhost:44161 2023/06/19 22:31:47 checking machine... 2023/06/19 22:31:47 checking revisions... [ 92.960191] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:31:47 testing simple program... [ 93.009982] cgroup: Unknown subsys name 'net' [ 93.073257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:30:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f113aabac40 CR3=0000000008db2000 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=2037343a31333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801ca12a0c RCX=0000000000000000 RDX=ffff888015d91b40 RSI=ffffffff844ba352 RDI=ffff888015e1f280 RBP=ffff888015e1f640 RSP=ffff888015e1f178 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=ffff88800e2a8828 R12=ffff888010109e0c R13=0000000000000000 R14=dffffc0000000000 R15=ffff888015e1f278 RIP=ffffffff844ba352 RFL=00000293 [--S-A-C] 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 00007f2e6a205900 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=00005597277e3b88 CR3=000000000d86a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000