syzkaller login: [ 39.847735] BUG: Bad rss-counter state mm:00000000124fecb7 type:MM_FILEPAGES val:33 [ 39.848974] BUG: Bad rss-counter state mm:00000000124fecb7 type:MM_ANONPAGES val:22 [ 40.010622] ================================================================== [ 40.011705] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.012868] Read of size 8 at addr ffff888018c68310 by task sshd/219 [ 40.013840] [ 40.014074] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.014970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.015986] Call Trace: [ 40.016321] [ 40.016612] dump_stack_lvl+0x91/0xf0 [ 40.017152] print_report+0xcc/0x620 [ 40.017651] ? __virt_addr_valid+0x102/0x340 [ 40.018216] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.018842] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.019492] kasan_report+0xbe/0xf0 [ 40.019989] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.020622] vma_interval_tree_remove+0xc75/0xec0 [ 40.021267] vma_prepare+0xc54/0x11a0 [ 40.021748] __split_vma+0x5af/0x950 [ 40.022238] ? __pfx___split_vma+0x10/0x10 [ 40.022775] ? find_held_lock+0x2c/0x110 [ 40.023333] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.023902] ? lock_is_held_type+0x9f/0x120 [ 40.024461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.025135] ? mtree_range_walk+0x632/0x900 [ 40.025689] ? mas_walk+0x5c7/0x7c0 [ 40.026176] do_vmi_munmap+0x1f1/0x2b0 [ 40.026672] mmap_region+0x1f9/0x2660 [ 40.027180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.027694] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.028424] ? __pfx_lock_acquire+0x10/0x10 [ 40.028994] ? __pfx_mmap_region+0x10/0x10 [ 40.029538] ? security_mmap_addr+0x7d/0xa0 [ 40.030082] ? get_unmapped_area+0x1f5/0x3f0 [ 40.030632] do_mmap+0x854/0xf00 [ 40.031085] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.031580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.032174] ksys_mmap_pgoff+0x3af/0x500 [ 40.032685] do_syscall_64+0x3f/0x90 [ 40.033216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.033862] RIP: 0033:0x7ff04232cd82 [ 40.034335] 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 [ 40.036485] RSP: 002b:00007ffefef03668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.037463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff04232cd82 [ 40.038327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff041766000 [ 40.039196] RBP: 00007ff041766000 R08: 0000000000000009 R09: 0000000000001000 [ 40.040045] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629df346d90 [ 40.040945] R13: 00007ffefef03680 R14: 00007ffefef036b0 R15: 00007ffefef03a10 [ 40.041822] [ 40.042130] [ 40.042344] Allocated by task 212: [ 40.042778] kasan_save_stack+0x22/0x50 [ 40.043298] kasan_set_track+0x25/0x30 [ 40.043792] __kasan_slab_alloc+0x59/0x70 [ 40.044340] kmem_cache_alloc+0x16b/0x370 [ 40.044903] vm_area_dup+0x20/0x160 [ 40.045375] __split_vma+0x170/0x950 [ 40.045845] split_vma+0xc6/0x110 [ 40.046301] mprotect_fixup+0x8d2/0xb30 [ 40.046814] do_mprotect_pkey+0x87e/0xd40 [ 40.047350] __x64_sys_mprotect+0x78/0xc0 [ 40.047873] do_syscall_64+0x3f/0x90 [ 40.048363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.049076] [ 40.049300] Freed by task 203: [ 40.049690] kasan_save_stack+0x22/0x50 [ 40.050211] kasan_set_track+0x25/0x30 [ 40.050708] kasan_save_free_info+0x2b/0x50 [ 40.051257] __kasan_slab_free+0x10a/0x190 [ 40.051792] kmem_cache_free+0x10d/0x4d0 [ 40.052314] rcu_core+0x8c8/0x2860 [ 40.052771] __do_softirq+0x1b7/0x7d4 [ 40.053302] [ 40.053519] Last potentially related work creation: [ 40.054121] kasan_save_stack+0x22/0x50 [ 40.054627] __kasan_record_aux_stack+0x8e/0xa0 [ 40.055216] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.055865] remove_vma+0x139/0x170 [ 40.056335] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.056933] do_vmi_munmap+0x1f1/0x2b0 [ 40.057437] __vm_munmap+0x138/0x3a0 [ 40.057907] __x64_sys_munmap+0x59/0x80 [ 40.058437] do_syscall_64+0x3f/0x90 [ 40.058914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.059569] [ 40.059788] The buggy address belongs to the object at ffff888018c682b8 [ 40.059788] which belongs to the cache vm_area_struct of size 168 [ 40.061322] The buggy address is located 88 bytes inside of [ 40.061322] freed 168-byte region [ffff888018c682b8, ffff888018c68360) [ 40.062727] [ 40.062944] The buggy address belongs to the physical page: [ 40.063627] page:000000005d196afa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c68 [ 40.064772] memcg:ffff88800d65a501 [ 40.065254] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.065914] page_type: 0xffffffff() [ 40.066399] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.067362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d65a501 [ 40.068355] page dumped because: kasan: bad access detected [ 40.069223] [ 40.069500] Memory state around the buggy address: [ 40.070238] ffff888018c68200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.071305] ffff888018c68280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.072366] >ffff888018c68300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.073443] ^ [ 40.074009] ffff888018c68380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 40.074902] ffff888018c68400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 40.075823] ================================================================== [ 40.076925] Disabling lock debugging due to kernel taint [ 42.174727] BUG: Bad rss-counter state mm:0000000027571920 type:MM_FILEPAGES val:33 [ 42.176124] BUG: Bad rss-counter state mm:0000000027571920 type:MM_ANONPAGES val:22 [ 42.649977] BUG: Bad rss-counter state mm:0000000042e221e1 type:MM_FILEPAGES val:33 [ 42.651175] BUG: Bad rss-counter state mm:0000000042e221e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49719' (ECDSA) to the list of known hosts. 2023/06/20 04:39:03 fuzzer started 2023/06/20 04:39:03 dialing manager at localhost:44161 2023/06/20 04:39:03 checking machine... 2023/06/20 04:39:03 checking revisions... [ 43.366919] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:39:04 testing simple program... [ 43.414459] cgroup: Unknown subsys name 'net' [ 43.451721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:39:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801a0279f0 RCX=0000000000000001 RDX=1ffff11003404f53 RSI=ffffffff83863943 RDI=ffff88801a0279fc RBP=ffff88801a027a98 RSP=ffff88801a027908 R8 =0000000000000001 R9 =ffff88801a027968 R10=0000000000038001 R11=000000000008b078 R12=ffff88801a0279f0 R13=0000000000000000 R14=ffff88800fb80000 R15=ffff88800f958000 RIP=ffffffff813ad4f7 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 00007f2866b8c900 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=00007f2867143618 CR3=00000000097fa000 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=ffffc90000660000 RBX=ffff88800f348b80 RCX=1ffff11001e69244 RDX=1ffff11001e691b6 RSI=0000000000000004 RDI=ffff88800f349220 RBP=1ffff1100138cf76 RSP=ffff888009c67b38 R8 =0000000000000001 R9 =ffffed100138cf55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f348d98 R13=000000000000010c R14=ffff88800f348000 R15=ffff88800f348b80 RIP=ffffffff8302de1f RFL=00000002 [-------] 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 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=00007f2c4fe1c6d0 CR3=000000000d816000 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=bbbf919212ad11aa29435a69aadc12ab XMM02=000000000011d360ec2efd57dc4c00df XMM03=0000000000123d00b91dae2ce40377af XMM04=7e34cd2c1276e28d00000000000ae988 XMM05=e9d78ddf15722ff50000000000133a10 XMM06=806171799158d9670000000000133410 XMM07=e042d86d42eb936e0000000000123f80 XMM08=b91dae2ce40377af000000000011d3c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000