syzkaller login: [ 87.441782] BUG: Bad rss-counter state mm:000000004ec64ac9 type:MM_FILEPAGES val:33 [ 87.443277] BUG: Bad rss-counter state mm:000000004ec64ac9 type:MM_ANONPAGES val:22 [ 87.593849] ================================================================== [ 87.594783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 87.595738] Read of size 8 at addr ffff888017f63df0 by task sshd/218 [ 87.596528] [ 87.596750] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 87.597945] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 87.598925] Call Trace: [ 87.599255] [ 87.599670] dump_stack_lvl+0x91/0xf0 [ 87.600259] print_report+0xcc/0x620 [ 87.600855] ? __virt_addr_valid+0x102/0x340 [ 87.601513] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.602259] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.603021] kasan_report+0xbe/0xf0 [ 87.603608] ? vma_interval_tree_remove+0xc75/0xec0 [ 87.604378] vma_interval_tree_remove+0xc75/0xec0 [ 87.605129] vma_prepare+0xc54/0x11a0 [ 87.605726] __split_vma+0x5af/0x950 [ 87.606314] ? __pfx___split_vma+0x10/0x10 [ 87.606972] ? find_held_lock+0x2c/0x110 [ 87.607620] do_vmi_align_munmap+0x2ba/0x11f0 [ 87.608314] ? lock_is_held_type+0x9f/0x120 [ 87.609004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 87.609670] ? mtree_range_walk+0x632/0x900 [ 87.610218] ? mas_walk+0x5c7/0x7c0 [ 87.610698] do_vmi_munmap+0x1f1/0x2b0 [ 87.611202] mmap_region+0x1f9/0x2660 [ 87.611689] ? vm_mmap_pgoff+0x15c/0x3a0 [ 87.612202] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 87.612930] ? __pfx_lock_acquire+0x10/0x10 [ 87.613462] ? __pfx_mmap_region+0x10/0x10 [ 87.613992] ? security_mmap_addr+0x7d/0xa0 [ 87.614537] ? get_unmapped_area+0x1f5/0x3f0 [ 87.615098] do_mmap+0x854/0xf00 [ 87.615547] vm_mmap_pgoff+0x1a6/0x3a0 [ 87.616047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 87.616631] ksys_mmap_pgoff+0x3af/0x500 [ 87.617146] do_syscall_64+0x3f/0x90 [ 87.617634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.618285] RIP: 0033:0x7f1bef3afd82 [ 87.618748] 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 [ 87.620885] RSP: 002b:00007ffe4e369268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 87.621791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bef3afd82 [ 87.622641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bee7e9000 [ 87.623493] RBP: 00007f1bee7e9000 R08: 0000000000000009 R09: 0000000000001000 [ 87.624349] R10: 0000000000000812 R11: 0000000000000206 R12: 000055606f666ec0 [ 87.625209] R13: 00007ffe4e369280 R14: 00007ffe4e3692b0 R15: 00007ffe4e369610 [ 87.626068] [ 87.626362] [ 87.626580] Allocated by task 211: [ 87.627006] kasan_save_stack+0x22/0x50 [ 87.627522] kasan_set_track+0x25/0x30 [ 87.628026] __kasan_slab_alloc+0x59/0x70 [ 87.628565] kmem_cache_alloc+0x16b/0x370 [ 87.629087] vm_area_dup+0x20/0x160 [ 87.629548] __split_vma+0x170/0x950 [ 87.630021] split_vma+0xc6/0x110 [ 87.630501] mprotect_fixup+0x8d2/0xb30 [ 87.631013] do_mprotect_pkey+0x87e/0xd40 [ 87.631547] __x64_sys_mprotect+0x78/0xc0 [ 87.632074] do_syscall_64+0x3f/0x90 [ 87.632560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.633221] [ 87.633440] Freed by task 211: [ 87.633842] kasan_save_stack+0x22/0x50 [ 87.634350] kasan_set_track+0x25/0x30 [ 87.634858] kasan_save_free_info+0x2b/0x50 [ 87.635394] __kasan_slab_free+0x10a/0x190 [ 87.635944] kmem_cache_free+0x10d/0x4d0 [ 87.636465] rcu_core+0x8c8/0x2860 [ 87.636916] __do_softirq+0x1b7/0x7d4 [ 87.637391] [ 87.637610] Last potentially related work creation: [ 87.638272] kasan_save_stack+0x22/0x50 [ 87.638791] __kasan_record_aux_stack+0x8e/0xa0 [ 87.639362] __call_rcu_common.constprop.0+0x6a/0xb90 [ 87.640026] remove_vma+0x139/0x170 [ 87.640523] do_vmi_align_munmap+0xd4a/0x11f0 [ 87.641092] do_vmi_munmap+0x1f1/0x2b0 [ 87.641579] __vm_munmap+0x138/0x3a0 [ 87.642064] __x64_sys_munmap+0x59/0x80 [ 87.642572] do_syscall_64+0x3f/0x90 [ 87.643053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 87.643711] [ 87.643925] The buggy address belongs to the object at ffff888017f63d98 [ 87.643925] which belongs to the cache vm_area_struct of size 168 [ 87.645400] The buggy address is located 88 bytes inside of [ 87.645400] freed 168-byte region [ffff888017f63d98, ffff888017f63e40) [ 87.646806] [ 87.647020] The buggy address belongs to the physical page: [ 87.647725] page:000000002c4f59c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f63 [ 87.648832] memcg:ffff8880162cc701 [ 87.649266] flags: 0x100000000000200(slab|node=0|zone=1) [ 87.649923] page_type: 0xffffffff() [ 87.650375] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 87.651291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880162cc701 [ 87.652194] page dumped because: kasan: bad access detected [ 87.652865] [ 87.653083] Memory state around the buggy address: [ 87.653666] ffff888017f63c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 87.654520] ffff888017f63d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 87.655383] >ffff888017f63d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 87.656239] ^ [ 87.657060] ffff888017f63e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 87.657921] ffff888017f63e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 87.658772] ================================================================== [ 87.659876] Disabling lock debugging due to kernel taint [ 89.699591] BUG: Bad rss-counter state mm:00000000f2afa6ab type:MM_FILEPAGES val:33 [ 89.700688] BUG: Bad rss-counter state mm:00000000f2afa6ab type:MM_ANONPAGES val:22 [ 90.241322] BUG: Bad rss-counter state mm:00000000e031fcac type:MM_FILEPAGES val:33 [ 90.242512] BUG: Bad rss-counter state mm:00000000e031fcac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17221' (ECDSA) to the list of known hosts. 2023/06/20 00:34:25 fuzzer started 2023/06/20 00:34:25 dialing manager at localhost:44161 2023/06/20 00:34:25 checking machine... 2023/06/20 00:34:25 checking revisions... [ 90.882758] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:34:25 testing simple program... [ 90.935070] cgroup: Unknown subsys name 'net' [ 90.977397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:33:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff818a913f RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888017e6fb08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888017e6fc48 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff814c01d0 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 00007f7ec3249900 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=00007f7ec37fe650 CR3=000000000e5e8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffd96809ed8 CR3=000000000e8ac000 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=34333a3030203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383031 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000