syzkaller login: [ 38.906227] BUG: Bad rss-counter state mm:000000008617b742 type:MM_FILEPAGES val:33 [ 38.907448] BUG: Bad rss-counter state mm:000000008617b742 type:MM_ANONPAGES val:22 [ 39.067751] ================================================================== [ 39.068815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.069913] Read of size 8 at addr ffff88800ddcb4e0 by task sshd/221 [ 39.070956] [ 39.071176] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.072031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.073040] Call Trace: [ 39.073363] [ 39.073648] dump_stack_lvl+0x91/0xf0 [ 39.074158] print_report+0xcc/0x620 [ 39.074644] ? __virt_addr_valid+0x102/0x340 [ 39.075190] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.075809] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.076427] kasan_report+0xbe/0xf0 [ 39.076904] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.077522] vma_interval_tree_remove+0xc75/0xec0 [ 39.078138] vma_prepare+0xc54/0x11a0 [ 39.078616] __split_vma+0x5af/0x950 [ 39.079085] ? __pfx___split_vma+0x10/0x10 [ 39.079632] ? find_held_lock+0x2c/0x110 [ 39.080177] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.080748] ? lock_is_held_type+0x9f/0x120 [ 39.081317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.081945] ? mtree_range_walk+0x632/0x900 [ 39.082553] ? mas_walk+0x5c7/0x7c0 [ 39.083029] do_vmi_munmap+0x1f1/0x2b0 [ 39.083556] mmap_region+0x1f9/0x2660 [ 39.084066] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.084600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.085346] ? __pfx_lock_acquire+0x10/0x10 [ 39.085900] ? __pfx_mmap_region+0x10/0x10 [ 39.086445] ? security_mmap_addr+0x7d/0xa0 [ 39.086978] ? get_unmapped_area+0x1f5/0x3f0 [ 39.087533] do_mmap+0x854/0xf00 [ 39.087976] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.088476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.089039] ksys_mmap_pgoff+0x3af/0x500 [ 39.089550] do_syscall_64+0x3f/0x90 [ 39.090029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.090701] RIP: 0033:0x7fa381363d82 [ 39.091158] 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 [ 39.093386] RSP: 002b:00007ffcc8c216e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.094351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa381363d82 [ 39.095253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa38079d000 [ 39.096140] RBP: 00007fa38079d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.097031] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d15f29cf60 [ 39.097921] R13: 00007ffcc8c21700 R14: 00007ffcc8c21730 R15: 00007ffcc8c21a90 [ 39.098818] [ 39.099125] [ 39.099347] Allocated by task 214: [ 39.099793] kasan_save_stack+0x22/0x50 [ 39.100318] kasan_set_track+0x25/0x30 [ 39.100834] __kasan_slab_alloc+0x59/0x70 [ 39.101376] kmem_cache_alloc+0x16b/0x370 [ 39.101909] vm_area_dup+0x20/0x160 [ 39.102416] __split_vma+0x170/0x950 [ 39.102903] split_vma+0xc6/0x110 [ 39.103362] mprotect_fixup+0x8d2/0xb30 [ 39.103881] do_mprotect_pkey+0x87e/0xd40 [ 39.104427] __x64_sys_mprotect+0x78/0xc0 [ 39.104963] do_syscall_64+0x3f/0x90 [ 39.105459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.106140] [ 39.106363] Freed by task 214: [ 39.106773] kasan_save_stack+0x22/0x50 [ 39.107302] kasan_set_track+0x25/0x30 [ 39.107820] kasan_save_free_info+0x2b/0x50 [ 39.108368] __kasan_slab_free+0x10a/0x190 [ 39.108919] kmem_cache_free+0x10d/0x4d0 [ 39.109450] rcu_core+0x8c8/0x2860 [ 39.109910] __do_softirq+0x1b7/0x7d4 [ 39.110426] [ 39.110646] Last potentially related work creation: [ 39.111251] kasan_save_stack+0x22/0x50 [ 39.111773] __kasan_record_aux_stack+0x8e/0xa0 [ 39.112371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.113038] remove_vma+0x139/0x170 [ 39.113507] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.114088] do_vmi_munmap+0x1f1/0x2b0 [ 39.114594] __vm_munmap+0x138/0x3a0 [ 39.115077] __x64_sys_munmap+0x59/0x80 [ 39.115595] do_syscall_64+0x3f/0x90 [ 39.116091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.116768] [ 39.116989] Second to last potentially related work creation: [ 39.117701] kasan_save_stack+0x22/0x50 [ 39.118238] __kasan_record_aux_stack+0x8e/0xa0 [ 39.118837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.119507] remove_vma+0x139/0x170 [ 39.119987] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.120563] do_vmi_munmap+0x1f1/0x2b0 [ 39.121067] mmap_region+0x1f9/0x2660 [ 39.121566] do_mmap+0x854/0xf00 [ 39.122016] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.122545] ksys_mmap_pgoff+0x3af/0x500 [ 39.123062] do_syscall_64+0x3f/0x90 [ 39.123554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.124217] [ 39.124441] The buggy address belongs to the object at ffff88800ddcb488 [ 39.124441] which belongs to the cache vm_area_struct of size 168 [ 39.125968] The buggy address is located 88 bytes inside of [ 39.125968] freed 168-byte region [ffff88800ddcb488, ffff88800ddcb530) [ 39.127444] [ 39.127665] The buggy address belongs to the physical page: [ 39.128347] page:0000000084763161 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddcb [ 39.129484] memcg:ffff8880095a3c01 [ 39.129931] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.130619] page_type: 0xffffffff() [ 39.131087] raw: 0100000000000200 ffff8880087a0c80 ffffea0000356840 dead000000000008 [ 39.132048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095a3c01 [ 39.133002] page dumped because: kasan: bad access detected [ 39.133695] [ 39.133918] Memory state around the buggy address: [ 39.134540] ffff88800ddcb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.135432] ffff88800ddcb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.136325] >ffff88800ddcb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.137208] ^ [ 39.137992] ffff88800ddcb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.138899] ffff88800ddcb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.139783] ================================================================== [ 39.141035] Disabling lock debugging due to kernel taint [ 41.810186] BUG: Bad rss-counter state mm:00000000225d2b1a type:MM_FILEPAGES val:33 [ 41.811308] BUG: Bad rss-counter state mm:00000000225d2b1a type:MM_ANONPAGES val:22 [ 42.348085] BUG: Bad rss-counter state mm:00000000bf60d2b0 type:MM_FILEPAGES val:33 [ 42.349559] BUG: Bad rss-counter state mm:00000000bf60d2b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12355' (ECDSA) to the list of known hosts. 2023/06/20 15:31:24 fuzzer started 2023/06/20 15:31:24 dialing manager at localhost:36067 2023/06/20 15:31:24 checking machine... 2023/06/20 15:31:24 checking revisions... [ 43.102073] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:31:24 testing simple program... [ 43.152297] cgroup: Unknown subsys name 'net' [ 43.194521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=0000000080000000 RSI=00000000000001b4 RDI=ffffffff85ba4dc0 RBP=ffffffff85ba4dc0 RSP=ffff88800f2dfc80 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000000 R14=ffff88800ea056b8 R15=ffff88800ea05080 RIP=ffffffff84536359 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 00007fc7a7891900 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=00007fc7a7e48618 CR3=000000000e7be000 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=563412feff00545000000000000080fe 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=0000000000000000 RBX=ffffea000038d240 RCX=0000000000000100 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806cf09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffffffff81845e00 R13=ffffea0000595d00 R14=ffffffff813782f8 R15=ffff88800e243f00 RIP=ffffffff8180c61b RFL=00000282 [--S----] 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=00007f3bf60c9b50 CR3=000000000c758000 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=d5994e7f9958adb038413b3ba7b64e81 XMM02=2c67c8bc2e329bc3000000000011c650 XMM03=fb795ef6d65770560000000000122450 XMM04=0a94e85532f418e800000000000ae988 XMM05=e4cb8bb95a7664b600000000001332b0 XMM06=a147d40371dbc59a0000000000132488 XMM07=e042d86d42eb936e0000000000122728 XMM08=45ca30a8f353c8e6000000000011c6b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000