syzkaller login: [ 31.794685] BUG: Bad rss-counter state mm:000000006a9e9cf7 type:MM_FILEPAGES val:33 [ 31.795693] BUG: Bad rss-counter state mm:000000006a9e9cf7 type:MM_ANONPAGES val:22 [ 31.984380] ================================================================== [ 31.985440] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.986564] Read of size 8 at addr ffff88800fc46798 by task sshd/221 [ 31.987424] [ 31.987670] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.988637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.989766] Call Trace: [ 31.990126] [ 31.990468] dump_stack_lvl+0x91/0xf0 [ 31.991017] print_report+0xcc/0x620 [ 31.991567] ? __virt_addr_valid+0x102/0x340 [ 31.992183] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.992929] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.993660] kasan_report+0xbe/0xf0 [ 31.994206] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.994919] vma_interval_tree_remove+0xc75/0xec0 [ 31.995617] vma_prepare+0xc54/0x11a0 [ 31.996162] __split_vma+0x5af/0x950 [ 31.996732] ? __pfx___split_vma+0x10/0x10 [ 31.997366] ? find_held_lock+0x2c/0x110 [ 31.997959] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.998616] ? lock_is_held_type+0x9f/0x120 [ 31.999226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.999928] ? mtree_range_walk+0x632/0x900 [ 32.000569] ? mas_walk+0x5c7/0x7c0 [ 32.001141] do_vmi_munmap+0x1f1/0x2b0 [ 32.001736] mmap_region+0x1f9/0x2660 [ 32.002298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.002885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.003713] ? __pfx_lock_acquire+0x10/0x10 [ 32.004342] ? __pfx_mmap_region+0x10/0x10 [ 32.004957] ? security_mmap_addr+0x7d/0xa0 [ 32.005574] ? get_unmapped_area+0x1f5/0x3f0 [ 32.006178] do_mmap+0x854/0xf00 [ 32.006669] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.007214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.007850] ksys_mmap_pgoff+0x3af/0x500 [ 32.008423] do_syscall_64+0x3f/0x90 [ 32.008979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.009720] RIP: 0033:0x7fd21dde2d82 [ 32.010216] 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 [ 32.012611] RSP: 002b:00007fff1a900278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.013645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd21dde2d82 [ 32.014582] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd21d21c000 [ 32.015524] RBP: 00007fd21d21c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.016463] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b950b6ec0 [ 32.017431] R13: 00007fff1a900290 R14: 00007fff1a9002c0 R15: 00007fff1a900620 [ 32.018395] [ 32.018727] [ 32.018962] Allocated by task 214: [ 32.019450] kasan_save_stack+0x22/0x50 [ 32.020000] kasan_set_track+0x25/0x30 [ 32.020570] __kasan_slab_alloc+0x59/0x70 [ 32.021169] kmem_cache_alloc+0x16b/0x370 [ 32.021768] vm_area_dup+0x20/0x160 [ 32.022285] __split_vma+0x170/0x950 [ 32.022809] split_vma+0xc6/0x110 [ 32.023304] mprotect_fixup+0x8d2/0xb30 [ 32.023881] do_mprotect_pkey+0x87e/0xd40 [ 32.024509] __x64_sys_mprotect+0x78/0xc0 [ 32.025120] do_syscall_64+0x3f/0x90 [ 32.025698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.026469] [ 32.026717] Freed by task 214: [ 32.027154] kasan_save_stack+0x22/0x50 [ 32.027758] kasan_set_track+0x25/0x30 [ 32.028341] kasan_save_free_info+0x2b/0x50 [ 32.028956] __kasan_slab_free+0x10a/0x190 [ 32.029562] kmem_cache_free+0x10d/0x4d0 [ 32.030128] rcu_core+0x8c8/0x2860 [ 32.030631] __do_softirq+0x1b7/0x7d4 [ 32.031163] [ 32.031407] Last potentially related work creation: [ 32.032066] kasan_save_stack+0x22/0x50 [ 32.032627] __kasan_record_aux_stack+0x8e/0xa0 [ 32.033293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.034019] remove_vma+0x139/0x170 [ 32.034530] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.035163] do_vmi_munmap+0x1f1/0x2b0 [ 32.035706] __vm_munmap+0x138/0x3a0 [ 32.036233] __x64_sys_munmap+0x59/0x80 [ 32.036804] do_syscall_64+0x3f/0x90 [ 32.037347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.038078] [ 32.038322] The buggy address belongs to the object at ffff88800fc46740 [ 32.038322] which belongs to the cache vm_area_struct of size 168 [ 32.039990] The buggy address is located 88 bytes inside of [ 32.039990] freed 168-byte region [ffff88800fc46740, ffff88800fc467e8) [ 32.041596] [ 32.041836] The buggy address belongs to the physical page: [ 32.042581] page:00000000943bcb9e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc46 [ 32.043798] memcg:ffff8880147a9301 [ 32.044288] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.045039] page_type: 0xffffffff() [ 32.045553] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.046593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147a9301 [ 32.047616] page dumped because: kasan: bad access detected [ 32.048350] [ 32.048591] Memory state around the buggy address: [ 32.049249] ffff88800fc46680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.050207] ffff88800fc46700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.051159] >ffff88800fc46780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.052110] ^ [ 32.052656] ffff88800fc46800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.053636] ffff88800fc46880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.054586] ================================================================== [ 32.055781] Disabling lock debugging due to kernel taint [ 34.064341] BUG: Bad rss-counter state mm:00000000ff3f40d9 type:MM_FILEPAGES val:33 [ 34.065401] BUG: Bad rss-counter state mm:00000000ff3f40d9 type:MM_ANONPAGES val:22 [ 34.536986] BUG: Bad rss-counter state mm:0000000023a4e10a type:MM_FILEPAGES val:33 [ 34.538240] BUG: Bad rss-counter state mm:0000000023a4e10a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19943' (ECDSA) to the list of known hosts. 2023/06/20 15:06:56 fuzzer started 2023/06/20 15:06:57 dialing manager at localhost:36067 2023/06/20 15:06:57 checking machine... 2023/06/20 15:06:57 checking revisions... [ 35.265096] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:06:57 testing simple program... [ 35.323834] cgroup: Unknown subsys name 'net' [ 35.398640] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:06:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11002c9fe8e RDX=dffffc0000000000 RSI=1ffff11002c9fe85 RDI=ffff8880164ff418 RBP=ffff8880164ff470 RSP=ffff8880164ff358 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880164ff418 R11=00000000000b6a61 R12=ffff8880164ff478 R13=ffff8880164ff460 R14=ffff8880164ff459 R15=ffff8880164ff418 RIP=ffffffff81130706 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 00007fd4f3b17900 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=00007fd4f40ce618 CR3=0000000015950000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f34b4d4f450 CR3=000000000d65a000 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=1d5853ed2fc53c863d479051c2441084 XMM02=000000000011bb20eff9b2d0a8fce9cb XMM03=000000000011bbf02c67c8bc2e329bc3 XMM04=cc6f5dbaa59797fb00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131930 XMM06=05ef4579f037273a0000000000130b08 XMM07=e042d86d42eb936e0000000000122018 XMM08=2ac7fc42098b6261000000000011bbf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000