syzkaller login: [ 31.431321] BUG: Bad rss-counter state mm:000000007beefe81 type:MM_FILEPAGES val:33 [ 31.432767] BUG: Bad rss-counter state mm:000000007beefe81 type:MM_ANONPAGES val:22 [ 31.472933] ================================================================== [ 31.474005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.475095] Read of size 8 at addr ffff88801a1cced8 by task sshd/220 [ 31.476165] [ 31.476401] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.477409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.478594] Call Trace: [ 31.479006] [ 31.479373] dump_stack_lvl+0x91/0xf0 [ 31.480156] print_report+0xcc/0x620 [ 31.480913] ? __virt_addr_valid+0x102/0x340 [ 31.481760] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.482402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.483024] kasan_report+0xbe/0xf0 [ 31.483509] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.484135] vma_interval_tree_remove+0xc75/0xec0 [ 31.484745] vma_prepare+0xc54/0x11a0 [ 31.485227] __split_vma+0x5af/0x950 [ 31.485723] ? __pfx___split_vma+0x10/0x10 [ 31.486259] ? find_held_lock+0x2c/0x110 [ 31.486790] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.487362] ? lock_is_held_type+0x9f/0x120 [ 31.487905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.488527] ? mtree_range_walk+0x632/0x900 [ 31.489119] ? mas_walk+0x5c7/0x7c0 [ 31.489630] do_vmi_munmap+0x1f1/0x2b0 [ 31.490196] mmap_region+0x1f9/0x2660 [ 31.490707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.491252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.492008] ? __pfx_lock_acquire+0x10/0x10 [ 31.492582] ? __pfx_mmap_region+0x10/0x10 [ 31.493146] ? security_mmap_addr+0x7d/0xa0 [ 31.493736] ? get_unmapped_area+0x1f5/0x3f0 [ 31.494330] do_mmap+0x854/0xf00 [ 31.494797] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.495320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.495910] ksys_mmap_pgoff+0x3af/0x500 [ 31.496447] do_syscall_64+0x3f/0x90 [ 31.496952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.497641] RIP: 0033:0x7f8e0fc1ed82 [ 31.498164] 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 [ 31.500454] RSP: 002b:00007ffeaa769fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.501408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e0fc1ed82 [ 31.502333] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e0f058000 [ 31.503235] RBP: 00007f8e0f058000 R08: 0000000000000009 R09: 0000000000001000 [ 31.504137] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592189ebd90 [ 31.505035] R13: 00007ffeaa769ff0 R14: 00007ffeaa76a020 R15: 00007ffeaa76a380 [ 31.505966] [ 31.506277] [ 31.506511] Allocated by task 213: [ 31.506970] kasan_save_stack+0x22/0x50 [ 31.507508] kasan_set_track+0x25/0x30 [ 31.508029] __kasan_slab_alloc+0x59/0x70 [ 31.508578] kmem_cache_alloc+0x16b/0x370 [ 31.509118] vm_area_dup+0x20/0x160 [ 31.509603] __split_vma+0x170/0x950 [ 31.510108] split_vma+0xc6/0x110 [ 31.510579] mprotect_fixup+0x8d2/0xb30 [ 31.511110] do_mprotect_pkey+0x87e/0xd40 [ 31.511658] __x64_sys_mprotect+0x78/0xc0 [ 31.512210] do_syscall_64+0x3f/0x90 [ 31.512710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.513400] [ 31.513635] Freed by task 213: [ 31.514091] kasan_save_stack+0x22/0x50 [ 31.514620] kasan_set_track+0x25/0x30 [ 31.515140] kasan_save_free_info+0x2b/0x50 [ 31.515711] __kasan_slab_free+0x10a/0x190 [ 31.516287] kmem_cache_free+0x10d/0x4d0 [ 31.516829] rcu_core+0x8c8/0x2860 [ 31.517298] __do_softirq+0x1b7/0x7d4 [ 31.517883] [ 31.518111] Last potentially related work creation: [ 31.518744] kasan_save_stack+0x22/0x50 [ 31.519279] __kasan_record_aux_stack+0x8e/0xa0 [ 31.519883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.520560] remove_vma+0x139/0x170 [ 31.521036] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.521625] do_vmi_munmap+0x1f1/0x2b0 [ 31.522192] __vm_munmap+0x138/0x3a0 [ 31.522690] __x64_sys_munmap+0x59/0x80 [ 31.523217] do_syscall_64+0x3f/0x90 [ 31.523735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.524426] [ 31.524673] The buggy address belongs to the object at ffff88801a1cce80 [ 31.524673] which belongs to the cache vm_area_struct of size 168 [ 31.526352] The buggy address is located 88 bytes inside of [ 31.526352] freed 168-byte region [ffff88801a1cce80, ffff88801a1ccf28) [ 31.527942] [ 31.528187] The buggy address belongs to the physical page: [ 31.528902] page:000000009aa1dd02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1cc [ 31.530084] memcg:ffff88800fd31b01 [ 31.530534] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.531225] page_type: 0xffffffff() [ 31.531702] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.532682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd31b01 [ 31.533650] page dumped because: kasan: bad access detected [ 31.534365] [ 31.534595] Memory state around the buggy address: [ 31.535205] ffff88801a1ccd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.536102] ffff88801a1cce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.537004] >ffff88801a1cce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.537921] ^ [ 31.538686] ffff88801a1ccf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.539602] ffff88801a1ccf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.540500] ================================================================== [ 31.541464] Disabling lock debugging due to kernel taint [ 33.548287] BUG: Bad rss-counter state mm:00000000b491bc9d type:MM_FILEPAGES val:33 [ 33.549480] BUG: Bad rss-counter state mm:00000000b491bc9d type:MM_ANONPAGES val:22 [ 34.033548] BUG: Bad rss-counter state mm:00000000fae7c738 type:MM_FILEPAGES val:33 [ 34.034611] BUG: Bad rss-counter state mm:00000000fae7c738 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16771' (ECDSA) to the list of known hosts. 2023/06/21 06:35:06 fuzzer started 2023/06/21 06:35:06 dialing manager at localhost:36067 2023/06/21 06:35:06 checking machine... 2023/06/21 06:35:06 checking revisions... [ 34.792609] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:35:07 testing simple program... [ 34.839570] cgroup: Unknown subsys name 'net' [ 34.877544] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3886f96b30 CR3=000000000ca96000 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=ec8f4a01be5aa896a4402ef64ea9d574 XMM02=2c67c8bc2e329bc3000000000011b3a8 XMM03=fb795ef6d657705600000000001220d0 XMM04=d1a8dda8852654b200000000000ae988 XMM05=19e9129bd510f2350000000000131fb0 XMM06=4fda316b135da52b0000000000131e38 XMM07=e042d86d42eb936e0000000000122350 XMM08=cf74e57e0f91ebee000000000011b408 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e134c RSI=ffff88800ef67f38 RDI=ffff88806cf09a60 RBP=ffff88800ef67f38 RSP=ffff88806cf099a8 R8 =ffffffff861427c0 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000002271e R12=0000000000000008 R13=ffff88800ef60000 R14=ffff88800ef67f40 R15=ffff88806cf09a50 RIP=ffffffff81130468 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 00007f7b07cad900 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=00007ffd6c0bb000 CR3=000000000c4e8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000