syzkaller login: [ 31.592829] BUG: Bad rss-counter state mm:00000000e574b42a type:MM_FILEPAGES val:33 [ 31.594120] BUG: Bad rss-counter state mm:00000000e574b42a type:MM_ANONPAGES val:22 [ 31.736429] ================================================================== [ 31.737401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.738360] Read of size 8 at addr ffff88801026a968 by task sshd/221 [ 31.739353] [ 31.739579] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.740512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.741556] Call Trace: [ 31.741894] [ 31.742196] dump_stack_lvl+0x91/0xf0 [ 31.742701] print_report+0xcc/0x620 [ 31.743216] ? __virt_addr_valid+0x102/0x340 [ 31.743795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.744467] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.745107] kasan_report+0xbe/0xf0 [ 31.745587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.746222] vma_interval_tree_remove+0xc75/0xec0 [ 31.746841] vma_prepare+0xc54/0x11a0 [ 31.747335] __split_vma+0x5af/0x950 [ 31.747821] ? __pfx___split_vma+0x10/0x10 [ 31.748368] ? find_held_lock+0x2c/0x110 [ 31.748903] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.749486] ? lock_is_held_type+0x9f/0x120 [ 31.750041] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.750663] ? mtree_range_walk+0x632/0x900 [ 31.751229] ? mas_walk+0x5c7/0x7c0 [ 31.751719] do_vmi_munmap+0x1f1/0x2b0 [ 31.752228] mmap_region+0x1f9/0x2660 [ 31.752744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.753276] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.754028] ? __pfx_lock_acquire+0x10/0x10 [ 31.754576] ? __pfx_mmap_region+0x10/0x10 [ 31.755120] ? security_mmap_addr+0x7d/0xa0 [ 31.755673] ? get_unmapped_area+0x1f5/0x3f0 [ 31.756243] do_mmap+0x854/0xf00 [ 31.756708] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.757212] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.757790] ksys_mmap_pgoff+0x3af/0x500 [ 31.758309] do_syscall_64+0x3f/0x90 [ 31.758804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.759460] RIP: 0033:0x7f10def8dd82 [ 31.759924] 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 [ 31.762117] RSP: 002b:00007ffd3d88b858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.763139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10def8dd82 [ 31.763957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10de3c7000 [ 31.764782] RBP: 00007f10de3c7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.765577] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594a2b16f70 [ 31.766376] R13: 00007ffd3d88b870 R14: 00007ffd3d88b8a0 R15: 00007ffd3d88bc00 [ 31.767185] [ 31.767462] [ 31.767669] Allocated by task 214: [ 31.768076] kasan_save_stack+0x22/0x50 [ 31.768560] kasan_set_track+0x25/0x30 [ 31.769028] __kasan_slab_alloc+0x59/0x70 [ 31.769523] kmem_cache_alloc+0x16b/0x370 [ 31.770016] vm_area_dup+0x20/0x160 [ 31.770448] __split_vma+0x170/0x950 [ 31.770888] split_vma+0xc6/0x110 [ 31.771303] mprotect_fixup+0x8d2/0xb30 [ 31.771777] do_mprotect_pkey+0x87e/0xd40 [ 31.772268] __x64_sys_mprotect+0x78/0xc0 [ 31.772767] do_syscall_64+0x3f/0x90 [ 31.773235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773869] [ 31.774076] Freed by task 214: [ 31.774453] kasan_save_stack+0x22/0x50 [ 31.774954] kasan_set_track+0x25/0x30 [ 31.775441] kasan_save_free_info+0x2b/0x50 [ 31.775965] __kasan_slab_free+0x10a/0x190 [ 31.776513] kmem_cache_free+0x10d/0x4d0 [ 31.777018] rcu_core+0x8c8/0x2860 [ 31.777459] __do_softirq+0x1b7/0x7d4 [ 31.777941] [ 31.778151] Last potentially related work creation: [ 31.778727] kasan_save_stack+0x22/0x50 [ 31.779227] __kasan_record_aux_stack+0x8e/0xa0 [ 31.779793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.780515] remove_vma+0x139/0x170 [ 31.780967] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.781516] do_vmi_munmap+0x1f1/0x2b0 [ 31.782005] __vm_munmap+0x138/0x3a0 [ 31.782469] __x64_sys_munmap+0x59/0x80 [ 31.782967] do_syscall_64+0x3f/0x90 [ 31.783437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.784076] [ 31.784282] The buggy address belongs to the object at ffff88801026a910 [ 31.784282] which belongs to the cache vm_area_struct of size 168 [ 31.785732] The buggy address is located 88 bytes inside of [ 31.785732] freed 168-byte region [ffff88801026a910, ffff88801026a9b8) [ 31.787117] [ 31.787334] The buggy address belongs to the physical page: [ 31.787992] page:00000000c70663c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1026a [ 31.789077] memcg:ffff888015d48201 [ 31.789493] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.790132] page_type: 0xffffffff() [ 31.790572] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.791473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d48201 [ 31.792372] page dumped because: kasan: bad access detected [ 31.793031] [ 31.793240] Memory state around the buggy address: [ 31.793814] ffff88801026a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.794660] ffff88801026a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.795502] >ffff88801026a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.796345] ^ [ 31.797113] ffff88801026a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.797954] ffff88801026aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.798800] ================================================================== [ 31.799712] Disabling lock debugging due to kernel taint [ 33.911462] BUG: Bad rss-counter state mm:00000000cfeb9038 type:MM_FILEPAGES val:33 [ 33.912690] BUG: Bad rss-counter state mm:00000000cfeb9038 type:MM_ANONPAGES val:22 [ 34.394041] BUG: Bad rss-counter state mm:00000000e0f17b44 type:MM_FILEPAGES val:33 [ 34.395217] BUG: Bad rss-counter state mm:00000000e0f17b44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57927' (ECDSA) to the list of known hosts. 2023/06/20 14:58:57 fuzzer started 2023/06/20 14:58:58 dialing manager at localhost:36067 2023/06/20 14:58:58 checking machine... 2023/06/20 14:58:58 checking revisions... [ 35.030025] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:58:58 testing simple program... [ 35.076514] cgroup: Unknown subsys name 'net' [ 35.127849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:58:57 Registers: info registers vcpu 0 RAX=ffff888008d9f940 RBX=ffff888008d9f938 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000039500 RDI=ffff888008d9f978 RBP=ffff888008c04000 RSP=ffff888008d9f768 R8 =dffffc0000000000 R9 =0000000000000000 R10=ffff888008dcc080 R11=0000000000005a00 R12=0000000000000000 R13=ffff888008d9f970 R14=0000000000000000 R15=0000000000000075 RIP=ffffffff81269a4e 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 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=00007f0e17061618 CR3=0000000019d0a000 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=38353a3431203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363634 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019c33680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888019c33a74 RBP=00007f0e16f9d163 RSP=ffff888017ec74c0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f0e16f9d163 R13=0000000000000000 R14=ffff888019c33680 R15=0000000000000014 RIP=ffffffff8135bd6b RFL=00000217 [----APC] 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 00007f0e16aaa900 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=00007f0e54556918 CR3=000000000c50a000 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=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