syzkaller login: [ 37.528983] BUG: Bad rss-counter state mm:0000000028636e60 type:MM_FILEPAGES val:33 [ 37.530128] BUG: Bad rss-counter state mm:0000000028636e60 type:MM_ANONPAGES val:22 [ 37.579509] ================================================================== [ 37.580461] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.581442] Read of size 8 at addr ffff8880164c6c20 by task sshd/220 [ 37.582251] [ 37.582478] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.583384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.584419] Call Trace: [ 37.584779] [ 37.585081] dump_stack_lvl+0x91/0xf0 [ 37.585600] print_report+0xcc/0x620 [ 37.586116] ? __virt_addr_valid+0x102/0x340 [ 37.586707] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.587347] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.588002] kasan_report+0xbe/0xf0 [ 37.588522] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.589196] vma_interval_tree_remove+0xc75/0xec0 [ 37.589876] vma_prepare+0xc54/0x11a0 [ 37.590392] __split_vma+0x5af/0x950 [ 37.590914] ? __pfx___split_vma+0x10/0x10 [ 37.591489] ? find_held_lock+0x2c/0x110 [ 37.592059] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.592695] ? lock_is_held_type+0x9f/0x120 [ 37.593269] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.593937] ? mtree_range_walk+0x632/0x900 [ 37.594530] ? mas_walk+0x5c7/0x7c0 [ 37.595064] do_vmi_munmap+0x1f1/0x2b0 [ 37.595608] mmap_region+0x1f9/0x2660 [ 37.596120] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.596701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.597462] ? __pfx_lock_acquire+0x10/0x10 [ 37.598049] ? __pfx_mmap_region+0x10/0x10 [ 37.598633] ? security_mmap_addr+0x7d/0xa0 [ 37.599203] ? get_unmapped_area+0x1f5/0x3f0 [ 37.599819] do_mmap+0x854/0xf00 [ 37.600312] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.600855] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.601455] ksys_mmap_pgoff+0x3af/0x500 [ 37.602015] do_syscall_64+0x3f/0x90 [ 37.602530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.603239] RIP: 0033:0x7fb15dfc1d82 [ 37.603745] 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 [ 37.606084] RSP: 002b:00007ffd613ec7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.607074] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb15dfc1d82 [ 37.608007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb15d3fb000 [ 37.608940] RBP: 00007fb15d3fb000 R08: 0000000000000009 R09: 0000000000001000 [ 37.609878] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562454847d90 [ 37.610810] R13: 00007ffd613ec7d0 R14: 00007ffd613ec800 R15: 00007ffd613ecb60 [ 37.611752] [ 37.612069] [ 37.612318] Allocated by task 213: [ 37.612798] kasan_save_stack+0x22/0x50 [ 37.613344] kasan_set_track+0x25/0x30 [ 37.613891] __kasan_slab_alloc+0x59/0x70 [ 37.614452] kmem_cache_alloc+0x16b/0x370 [ 37.615036] vm_area_dup+0x20/0x160 [ 37.615533] __split_vma+0x170/0x950 [ 37.616046] split_vma+0xc6/0x110 [ 37.616530] mprotect_fixup+0x8d2/0xb30 [ 37.617081] do_mprotect_pkey+0x87e/0xd40 [ 37.617658] __x64_sys_mprotect+0x78/0xc0 [ 37.618217] do_syscall_64+0x3f/0x90 [ 37.618740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.619429] [ 37.619693] Freed by task 19: [ 37.620106] kasan_save_stack+0x22/0x50 [ 37.620681] kasan_set_track+0x25/0x30 [ 37.621213] kasan_save_free_info+0x2b/0x50 [ 37.621806] __kasan_slab_free+0x10a/0x190 [ 37.622382] kmem_cache_free+0x10d/0x4d0 [ 37.622950] rcu_core+0x8c8/0x2860 [ 37.623428] __do_softirq+0x1b7/0x7d4 [ 37.623959] [ 37.624191] Last potentially related work creation: [ 37.624855] kasan_save_stack+0x22/0x50 [ 37.625399] __kasan_record_aux_stack+0x8e/0xa0 [ 37.626028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.626736] remove_vma+0x139/0x170 [ 37.627222] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.627845] do_vmi_munmap+0x1f1/0x2b0 [ 37.628380] __vm_munmap+0x138/0x3a0 [ 37.628904] __x64_sys_munmap+0x59/0x80 [ 37.629437] do_syscall_64+0x3f/0x90 [ 37.629979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.630688] [ 37.630921] The buggy address belongs to the object at ffff8880164c6bc8 [ 37.630921] which belongs to the cache vm_area_struct of size 168 [ 37.632696] The buggy address is located 88 bytes inside of [ 37.632696] freed 168-byte region [ffff8880164c6bc8, ffff8880164c6c70) [ 37.634251] [ 37.634490] The buggy address belongs to the physical page: [ 37.635242] page:0000000035fb6298 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164c6 [ 37.636488] memcg:ffff88800e7d0601 [ 37.636978] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.637712] page_type: 0xffffffff() [ 37.638204] raw: 0100000000000200 ffff88800879fc80 ffffea00003995c0 dead000000000004 [ 37.639229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7d0601 [ 37.640284] page dumped because: kasan: bad access detected [ 37.641032] [ 37.641269] Memory state around the buggy address: [ 37.641925] ffff8880164c6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.642891] ffff8880164c6b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.643846] >ffff8880164c6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.644833] ^ [ 37.645416] ffff8880164c6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 37.646371] ffff8880164c6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 37.647327] ================================================================== [ 37.648750] Disabling lock debugging due to kernel taint [ 39.706512] BUG: Bad rss-counter state mm:00000000a8e86a48 type:MM_FILEPAGES val:33 [ 39.707855] BUG: Bad rss-counter state mm:00000000a8e86a48 type:MM_ANONPAGES val:22 [ 40.148369] BUG: Bad rss-counter state mm:000000001739aed0 type:MM_FILEPAGES val:33 [ 40.149689] BUG: Bad rss-counter state mm:000000001739aed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36421' (ECDSA) to the list of known hosts. 2023/06/20 01:42:05 fuzzer started 2023/06/20 01:42:06 dialing manager at localhost:44161 2023/06/20 01:42:06 checking machine... 2023/06/20 01:42:06 checking revisions... [ 40.965541] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:42:06 testing simple program... [ 41.026826] cgroup: Unknown subsys name 'net' [ 41.071758] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:59 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=00007f2eca400a10 CR3=0000000016870000 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=32343a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323834 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bcc7be RBX=ffffffff85e63df4 RCX=ffffffff81f58b4c RDX=0000000000000000 RSI=ffffffff861d22f6 RDI=ffffffff85e63df0 RBP=ffffffff85e63df0 RSP=ffff88806cf099b8 R8 =ffffffff861d22f6 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000003aa87 R12=ffffffff85e63df8 R13=ffffffff85e63df0 R14=ffffffff85e63df0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f0b7d2dd900 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=0000558798c0b954 CR3=0000000010140000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000