syzkaller login: [ 40.360169] BUG: Bad rss-counter state mm:000000001932affc type:MM_FILEPAGES val:33 [ 40.361675] BUG: Bad rss-counter state mm:000000001932affc type:MM_ANONPAGES val:22 [ 40.550720] ================================================================== [ 40.551706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.552721] Read of size 8 at addr ffff88800d0a7b38 by task sshd/221 [ 40.553613] [ 40.553854] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.554802] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.555869] Call Trace: [ 40.556216] [ 40.556557] dump_stack_lvl+0x91/0xf0 [ 40.557088] print_report+0xcc/0x620 [ 40.557610] ? __virt_addr_valid+0x102/0x340 [ 40.558208] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.558895] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.559559] kasan_report+0xbe/0xf0 [ 40.560079] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.560785] vma_interval_tree_remove+0xc75/0xec0 [ 40.561432] vma_prepare+0xc54/0x11a0 [ 40.561957] __split_vma+0x5af/0x950 [ 40.562467] ? __pfx___split_vma+0x10/0x10 [ 40.563054] ? find_held_lock+0x2c/0x110 [ 40.563619] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.564238] ? lock_is_held_type+0x9f/0x120 [ 40.564853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.565505] ? mtree_range_walk+0x632/0x900 [ 40.566110] ? mas_walk+0x5c7/0x7c0 [ 40.566631] do_vmi_munmap+0x1f1/0x2b0 [ 40.567186] mmap_region+0x1f9/0x2660 [ 40.567738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.568326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.569125] ? __pfx_lock_acquire+0x10/0x10 [ 40.569716] ? __pfx_mmap_region+0x10/0x10 [ 40.570275] ? security_mmap_addr+0x7d/0xa0 [ 40.570859] ? get_unmapped_area+0x1f5/0x3f0 [ 40.571440] do_mmap+0x854/0xf00 [ 40.571932] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.572480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.573095] ksys_mmap_pgoff+0x3af/0x500 [ 40.573647] do_syscall_64+0x3f/0x90 [ 40.574166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.574872] RIP: 0033:0x7f16ed065d82 [ 40.575360] 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 [ 40.577684] RSP: 002b:00007ffd83203988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.578651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16ed065d82 [ 40.579565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16ec49f000 [ 40.580517] RBP: 00007f16ec49f000 R08: 0000000000000009 R09: 0000000000001000 [ 40.581443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf22bc4b20 [ 40.582360] R13: 00007ffd832039a0 R14: 00007ffd832039d0 R15: 00007ffd83203d30 [ 40.583297] [ 40.583609] [ 40.583859] Allocated by task 213: [ 40.584337] kasan_save_stack+0x22/0x50 [ 40.584897] kasan_set_track+0x25/0x30 [ 40.585422] __kasan_slab_alloc+0x59/0x70 [ 40.586003] kmem_cache_alloc+0x16b/0x370 [ 40.586559] vm_area_dup+0x20/0x160 [ 40.587058] __split_vma+0x170/0x950 [ 40.587554] split_vma+0xc6/0x110 [ 40.588047] mprotect_fixup+0x8d2/0xb30 [ 40.588608] do_mprotect_pkey+0x87e/0xd40 [ 40.589184] __x64_sys_mprotect+0x78/0xc0 [ 40.589761] do_syscall_64+0x3f/0x90 [ 40.590270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.590973] [ 40.591205] Freed by task 210: [ 40.591678] kasan_save_stack+0x22/0x50 [ 40.592410] kasan_set_track+0x25/0x30 [ 40.593011] kasan_save_free_info+0x2b/0x50 [ 40.593588] __kasan_slab_free+0x10a/0x190 [ 40.594188] kmem_cache_free+0x10d/0x4d0 [ 40.594758] rcu_core+0x8c8/0x2860 [ 40.595239] __do_softirq+0x1b7/0x7d4 [ 40.595776] [ 40.596005] Last potentially related work creation: [ 40.596661] kasan_save_stack+0x22/0x50 [ 40.597193] __kasan_record_aux_stack+0x8e/0xa0 [ 40.597829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.598511] remove_vma+0x139/0x170 [ 40.599008] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.599617] do_vmi_munmap+0x1f1/0x2b0 [ 40.600169] __vm_munmap+0x138/0x3a0 [ 40.600701] __x64_sys_munmap+0x59/0x80 [ 40.601234] do_syscall_64+0x3f/0x90 [ 40.601761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.602462] [ 40.602712] Second to last potentially related work creation: [ 40.603444] kasan_save_stack+0x22/0x50 [ 40.604013] __kasan_record_aux_stack+0x8e/0xa0 [ 40.604664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.605357] remove_vma+0x139/0x170 [ 40.605858] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.606460] do_vmi_munmap+0x1f1/0x2b0 [ 40.606996] mmap_region+0x1f9/0x2660 [ 40.607505] do_mmap+0x854/0xf00 [ 40.607986] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.608528] ksys_mmap_pgoff+0x3af/0x500 [ 40.609093] do_syscall_64+0x3f/0x90 [ 40.609612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.610312] [ 40.610547] The buggy address belongs to the object at ffff88800d0a7ae0 [ 40.610547] which belongs to the cache vm_area_struct of size 168 [ 40.612150] The buggy address is located 88 bytes inside of [ 40.612150] freed 168-byte region [ffff88800d0a7ae0, ffff88800d0a7b88) [ 40.613726] [ 40.613960] The buggy address belongs to the physical page: [ 40.614682] page:0000000082781464 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd0a7 [ 40.615859] memcg:ffff88800d2e6801 [ 40.616327] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.617105] page_type: 0xffffffff() [ 40.617597] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.618608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e6801 [ 40.619596] page dumped because: kasan: bad access detected [ 40.620344] [ 40.620578] Memory state around the buggy address: [ 40.621224] ffff88800d0a7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.622163] ffff88800d0a7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 40.623100] >ffff88800d0a7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.624029] ^ [ 40.624736] ffff88800d0a7b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 40.625684] ffff88800d0a7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 40.626601] ================================================================== [ 40.627741] Disabling lock debugging due to kernel taint [ 42.597289] BUG: Bad rss-counter state mm:000000003aa95f11 type:MM_FILEPAGES val:33 [ 42.598300] BUG: Bad rss-counter state mm:000000003aa95f11 type:MM_ANONPAGES val:22 [ 43.153674] BUG: Bad rss-counter state mm:00000000943a61cc type:MM_FILEPAGES val:33 [ 43.154848] BUG: Bad rss-counter state mm:00000000943a61cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41817' (ECDSA) to the list of known hosts. 2023/06/20 00:21:03 fuzzer started 2023/06/20 00:21:03 dialing manager at localhost:44161 2023/06/20 00:21:03 checking machine... 2023/06/20 00:21:03 checking revisions... [ 43.790028] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:21:03 testing simple program... [ 43.836589] cgroup: Unknown subsys name 'net' [ 43.888354] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:20:53 Registers: info registers vcpu 0 RAX=ffff888019fb0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019fafc01 RSI=ffff888019fafca0 RDI=ffff888019fafa90 RBP=ffff888019fafca0 RSP=ffff888019faf9e8 R8 =ffffffff8613daa0 R9 =ffff888019fafac0 R10=0000000000038001 R11=0000000000021e78 R12=0000000000000008 R13=ffff888019fa8000 R14=ffff888019fafca8 R15=ffff888019fafa80 RIP=ffffffff811304ce RFL=00000292 [--S-A--] 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 00007fdd0c565900 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=00007fdd0cb1c618 CR3=000000000e1f6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f6d03aca600 CR3=000000000c808000 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=2191479a243d20854549f115b55267aa XMM02=0000000000122528ec2efd57dc4c00df XMM03=0000000000125580bab50e550057f869 XMM04=c9b3b73d6c5716a000000000000ae988 XMM05=da5cac3184a20a060000000000137220 XMM06=c291bd5c70af25b900000000001362c0 XMM07=e042d86d42eb936e0000000000125800 XMM08=bab50e550057f8690000000000122588 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000