syzkaller login: [ 30.988662] BUG: Bad rss-counter state mm:00000000cd52e6bb type:MM_FILEPAGES val:33 [ 30.990031] BUG: Bad rss-counter state mm:00000000cd52e6bb type:MM_ANONPAGES val:22 [ 31.163073] ================================================================== [ 31.164060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.165187] Read of size 8 at addr ffff88801bc6b228 by task sshd/220 [ 31.166033] [ 31.166267] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.167199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.168249] Call Trace: [ 31.168591] [ 31.168900] dump_stack_lvl+0x91/0xf0 [ 31.169434] print_report+0xcc/0x620 [ 31.169971] ? __virt_addr_valid+0x102/0x340 [ 31.170579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171914] kasan_report+0xbe/0xf0 [ 31.172425] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173102] vma_interval_tree_remove+0xc75/0xec0 [ 31.173766] vma_prepare+0xc54/0x11a0 [ 31.174308] __split_vma+0x5af/0x950 [ 31.174824] ? __pfx___split_vma+0x10/0x10 [ 31.175397] ? find_held_lock+0x2c/0x110 [ 31.175973] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.176589] ? lock_is_held_type+0x9f/0x120 [ 31.177167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.177833] ? mtree_range_walk+0x632/0x900 [ 31.178447] ? mas_walk+0x5c7/0x7c0 [ 31.178965] do_vmi_munmap+0x1f1/0x2b0 [ 31.179505] mmap_region+0x1f9/0x2660 [ 31.180030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.180587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.181371] ? __pfx_lock_acquire+0x10/0x10 [ 31.181989] ? __pfx_mmap_region+0x10/0x10 [ 31.182581] ? security_mmap_addr+0x7d/0xa0 [ 31.183158] ? get_unmapped_area+0x1f5/0x3f0 [ 31.183755] do_mmap+0x854/0xf00 [ 31.184223] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.184752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.185368] ksys_mmap_pgoff+0x3af/0x500 [ 31.185936] do_syscall_64+0x3f/0x90 [ 31.186469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.187186] RIP: 0033:0x7fe5fbbdbd82 [ 31.187699] 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 [ 31.190043] RSP: 002b:00007ffe782b3b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.191011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5fbbdbd82 [ 31.191914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5fb015000 [ 31.192817] RBP: 00007fe5fb015000 R08: 0000000000000009 R09: 0000000000001000 [ 31.193713] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce61867ec0 [ 31.194612] R13: 00007ffe782b3b60 R14: 00007ffe782b3b90 R15: 00007ffe782b3ef0 [ 31.195522] [ 31.195840] [ 31.196066] Allocated by task 213: [ 31.196515] kasan_save_stack+0x22/0x50 [ 31.197056] kasan_set_track+0x25/0x30 [ 31.197576] __kasan_slab_alloc+0x59/0x70 [ 31.198149] kmem_cache_alloc+0x16b/0x370 [ 31.198694] vm_area_dup+0x20/0x160 [ 31.199177] __split_vma+0x170/0x950 [ 31.199675] split_vma+0xc6/0x110 [ 31.200146] mprotect_fixup+0x8d2/0xb30 [ 31.200691] do_mprotect_pkey+0x87e/0xd40 [ 31.201250] __x64_sys_mprotect+0x78/0xc0 [ 31.201807] do_syscall_64+0x3f/0x90 [ 31.202317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203008] [ 31.203234] Freed by task 213: [ 31.203656] kasan_save_stack+0x22/0x50 [ 31.204200] kasan_set_track+0x25/0x30 [ 31.204735] kasan_save_free_info+0x2b/0x50 [ 31.205296] __kasan_slab_free+0x10a/0x190 [ 31.205863] kmem_cache_free+0x10d/0x4d0 [ 31.206419] rcu_core+0x8c8/0x2860 [ 31.206894] __do_softirq+0x1b7/0x7d4 [ 31.207407] [ 31.207634] Last potentially related work creation: [ 31.208250] kasan_save_stack+0x22/0x50 [ 31.208784] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210086] remove_vma+0x139/0x170 [ 31.210560] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211149] do_vmi_munmap+0x1f1/0x2b0 [ 31.211658] __vm_munmap+0x138/0x3a0 [ 31.212153] __x64_sys_munmap+0x59/0x80 [ 31.212688] do_syscall_64+0x3f/0x90 [ 31.213182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213866] [ 31.214111] The buggy address belongs to the object at ffff88801bc6b1d0 [ 31.214111] which belongs to the cache vm_area_struct of size 168 [ 31.215762] The buggy address is located 88 bytes inside of [ 31.215762] freed 168-byte region [ffff88801bc6b1d0, ffff88801bc6b278) [ 31.217306] [ 31.217539] The buggy address belongs to the physical page: [ 31.218259] page:00000000b4db90b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc6b [ 31.219427] memcg:ffff88800e27ce01 [ 31.219905] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.220591] page_type: 0xffffffff() [ 31.221068] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.222077] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e27ce01 [ 31.223026] page dumped because: kasan: bad access detected [ 31.223723] [ 31.223954] Memory state around the buggy address: [ 31.224571] ffff88801bc6b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.225485] ffff88801bc6b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.226443] >ffff88801bc6b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.227366] ^ [ 31.227966] ffff88801bc6b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.228909] ffff88801bc6b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.229841] ================================================================== [ 31.230942] Disabling lock debugging due to kernel taint [ 33.925661] BUG: Bad rss-counter state mm:000000001168c743 type:MM_FILEPAGES val:33 [ 33.926808] BUG: Bad rss-counter state mm:000000001168c743 type:MM_ANONPAGES val:22 [ 34.340678] BUG: Bad rss-counter state mm:00000000c46dfa90 type:MM_FILEPAGES val:33 [ 34.342459] BUG: Bad rss-counter state mm:00000000c46dfa90 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16199' (ECDSA) to the list of known hosts. 2023/06/20 21:29:59 fuzzer started 2023/06/20 21:30:00 dialing manager at localhost:36067 2023/06/20 21:30:00 checking machine... 2023/06/20 21:30:00 checking revisions... [ 35.094850] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:30:00 testing simple program... [ 35.150556] cgroup: Unknown subsys name 'net' [ 35.216932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff8542a6c0 RCX=ffffffff85408000 RDX=ffffffff8542a6c0 RSI=ffffffff8542a6c0 RDI=ffff88806ce09a00 RBP=ffff88806ce09a50 RSP=ffff88806ce099c0 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806ce09a50 R11=1ffff1100d9c7479 R12=ffff88806ce09a00 R13=ffff88806ce09a78 R14=ffff88806ce09a98 R15=ffff88806ce09a50 RIP=ffffffff8450e0a3 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 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=00007fa5ffc43000 CR3=000000000ea82000 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=2039353a39323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a39323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007ffc79451620 RCX=0000000000000000 RDX=00000000ffffffff RSI=0000000000008000 RDI=00007ffc794514e0 RBP=00007ffc79451750 RSP=00007ffc794514d8 R8 =0000000000000000 R9 =0000000000000002 R10=00007fbbdeac8258 R11=00007fbbdeaa93c0 R12=ffffffffffffffff R13=0000000000000000 R14=00007ffc794514e0 R15=00007fbbdeac8258 RIP=00007fbbde9ba030 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 00007fbbde543900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc7944e000 CR3=000000000efcc000 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=563412feff00545000000000000080fe 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