syzkaller login: [ 30.565590] BUG: Bad rss-counter state mm:000000008af2b5f1 type:MM_FILEPAGES val:33 [ 30.566766] BUG: Bad rss-counter state mm:000000008af2b5f1 type:MM_ANONPAGES val:22 [ 30.604500] ================================================================== [ 30.605469] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.606429] Read of size 8 at addr ffff88800eed06b0 by task sshd/220 [ 30.607367] [ 30.607594] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.608488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.609517] Call Trace: [ 30.609846] [ 30.610138] dump_stack_lvl+0x91/0xf0 [ 30.610646] print_report+0xcc/0x620 [ 30.611148] ? __virt_addr_valid+0x102/0x340 [ 30.611718] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612351] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.612998] kasan_report+0xbe/0xf0 [ 30.613496] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.614138] vma_interval_tree_remove+0xc75/0xec0 [ 30.614745] vma_prepare+0xc54/0x11a0 [ 30.615230] __split_vma+0x5af/0x950 [ 30.615707] ? __pfx___split_vma+0x10/0x10 [ 30.616249] ? find_held_lock+0x2c/0x110 [ 30.616779] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.617385] ? lock_is_held_type+0x9f/0x120 [ 30.617925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.618546] ? mtree_range_walk+0x632/0x900 [ 30.619106] ? mas_walk+0x5c7/0x7c0 [ 30.619587] do_vmi_munmap+0x1f1/0x2b0 [ 30.620083] mmap_region+0x1f9/0x2660 [ 30.620583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.621102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.621845] ? __pfx_lock_acquire+0x10/0x10 [ 30.622389] ? __pfx_mmap_region+0x10/0x10 [ 30.622926] ? security_mmap_addr+0x7d/0xa0 [ 30.623467] ? get_unmapped_area+0x1f5/0x3f0 [ 30.624013] do_mmap+0x854/0xf00 [ 30.624457] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.624961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.625544] ksys_mmap_pgoff+0x3af/0x500 [ 30.626063] do_syscall_64+0x3f/0x90 [ 30.626539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627207] RIP: 0033:0x7f0efd34cd82 [ 30.627672] 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 [ 30.629857] RSP: 002b:00007ffe76389fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.630785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0efd34cd82 [ 30.631645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0efc786000 [ 30.632492] RBP: 00007f0efc786000 R08: 0000000000000009 R09: 0000000000001000 [ 30.633368] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfa4500ec0 [ 30.634240] R13: 00007ffe76389fd0 R14: 00007ffe7638a000 R15: 00007ffe7638a360 [ 30.635104] [ 30.635416] [ 30.635632] Allocated by task 213: [ 30.636063] kasan_save_stack+0x22/0x50 [ 30.636576] kasan_set_track+0x25/0x30 [ 30.637069] __kasan_slab_alloc+0x59/0x70 [ 30.637610] kmem_cache_alloc+0x16b/0x370 [ 30.638133] vm_area_dup+0x20/0x160 [ 30.638595] __split_vma+0x170/0x950 [ 30.639061] split_vma+0xc6/0x110 [ 30.639511] mprotect_fixup+0x8d2/0xb30 [ 30.640016] do_mprotect_pkey+0x87e/0xd40 [ 30.640542] __x64_sys_mprotect+0x78/0xc0 [ 30.641068] do_syscall_64+0x3f/0x90 [ 30.641580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642233] [ 30.642447] Freed by task 213: [ 30.642847] kasan_save_stack+0x22/0x50 [ 30.643357] kasan_set_track+0x25/0x30 [ 30.643866] kasan_save_free_info+0x2b/0x50 [ 30.644400] __kasan_slab_free+0x10a/0x190 [ 30.644944] kmem_cache_free+0x10d/0x4d0 [ 30.645464] rcu_core+0x8c8/0x2860 [ 30.645922] __do_softirq+0x1b7/0x7d4 [ 30.646398] [ 30.646627] Last potentially related work creation: [ 30.647214] kasan_save_stack+0x22/0x50 [ 30.647730] __kasan_record_aux_stack+0x8e/0xa0 [ 30.648312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.648959] remove_vma+0x139/0x170 [ 30.649456] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.650030] do_vmi_munmap+0x1f1/0x2b0 [ 30.650515] __vm_munmap+0x138/0x3a0 [ 30.650991] __x64_sys_munmap+0x59/0x80 [ 30.651501] do_syscall_64+0x3f/0x90 [ 30.651999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.652657] [ 30.652872] Second to last potentially related work creation: [ 30.653579] kasan_save_stack+0x22/0x50 [ 30.654101] __kasan_record_aux_stack+0x8e/0xa0 [ 30.654687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.655329] remove_vma+0x139/0x170 [ 30.655795] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.656362] do_vmi_munmap+0x1f1/0x2b0 [ 30.656851] __vm_munmap+0x138/0x3a0 [ 30.657353] __x64_sys_munmap+0x59/0x80 [ 30.657860] do_syscall_64+0x3f/0x90 [ 30.658339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658991] [ 30.659220] The buggy address belongs to the object at ffff88800eed0658 [ 30.659220] which belongs to the cache vm_area_struct of size 168 [ 30.660694] The buggy address is located 88 bytes inside of [ 30.660694] freed 168-byte region [ffff88800eed0658, ffff88800eed0700) [ 30.662145] [ 30.662364] The buggy address belongs to the physical page: [ 30.663057] page:00000000ff6a6a8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeed0 [ 30.664164] memcg:ffff88800eba0801 [ 30.664608] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.665286] page_type: 0xffffffff() [ 30.665749] raw: 0100000000000200 ffff88800879fc80 ffffea00003746c0 dead000000000002 [ 30.666692] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba0801 [ 30.667622] page dumped because: kasan: bad access detected [ 30.668304] [ 30.668517] Memory state around the buggy address: [ 30.669105] ffff88800eed0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.669991] ffff88800eed0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.670849] >ffff88800eed0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.671716] ^ [ 30.672312] ffff88800eed0700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.673170] ffff88800eed0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.674053] ================================================================== [ 30.675253] Disabling lock debugging due to kernel taint [ 33.427979] BUG: Bad rss-counter state mm:00000000fd1e9eed type:MM_FILEPAGES val:33 [ 33.429151] BUG: Bad rss-counter state mm:00000000fd1e9eed type:MM_ANONPAGES val:22 [ 33.819187] BUG: Bad rss-counter state mm:0000000079c2fe55 type:MM_FILEPAGES val:33 [ 33.820388] BUG: Bad rss-counter state mm:0000000079c2fe55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33016' (ECDSA) to the list of known hosts. 2023/06/20 07:00:34 fuzzer started 2023/06/20 07:00:34 dialing manager at localhost:44161 2023/06/20 07:00:34 checking machine... 2023/06/20 07:00:34 checking revisions... [ 34.508778] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:00:34 testing simple program... [ 34.557719] cgroup: Unknown subsys name 'net' [ 34.611997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:00:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000565498fb1d00 RCX=0000000000000000 RDX=0000000000000001 RSI=00007ffd60d82278 RDI=0000565498fb1de0 RBP=00007ffd60d82270 RSP=00007ffd60d82210 R8 =0000565498fbfd3b R9 =00007ff5f020bbe0 R10=000000000000006f R11=0000000000000246 R12=00007ff5efc59900 R13=00007ffd60d82278 R14=00007ff5efc34b22 R15=00007ff5efc59710 RIP=00007ff5f00c28ca RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff5efc59900 00000000 00000000 GS =0000 0000000000000000 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=00007ff5f020e650 CR3=000000000ea26000 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=23232323232323232323232323232323 XMM01=000000000000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=6300003030363009094d524550595454 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=746c756166654409094b53414d550923 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=0000565498ff1000 CR3=0000000005482000 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=00007fbb9daf95100000563cbf282790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000