syzkaller login: [ 51.341844] BUG: Bad rss-counter state mm:00000000fcc2c635 type:MM_FILEPAGES val:33 [ 51.343097] BUG: Bad rss-counter state mm:00000000fcc2c635 type:MM_ANONPAGES val:22 [ 51.382322] ================================================================== [ 51.383487] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.384549] Read of size 8 at addr ffff88800c5aab38 by task sshd/218 [ 51.385451] [ 51.385695] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.386727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.387754] Call Trace: [ 51.388090] [ 51.388391] dump_stack_lvl+0x91/0xf0 [ 51.388902] print_report+0xcc/0x620 [ 51.389412] ? __virt_addr_valid+0x102/0x340 [ 51.390016] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.390669] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.391318] kasan_report+0xbe/0xf0 [ 51.391820] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.392486] vma_interval_tree_remove+0xc75/0xec0 [ 51.393148] vma_prepare+0xc54/0x11a0 [ 51.393686] __split_vma+0x5af/0x950 [ 51.394203] ? __pfx___split_vma+0x10/0x10 [ 51.394780] ? find_held_lock+0x2c/0x110 [ 51.395349] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.395962] ? lock_is_held_type+0x9f/0x120 [ 51.396544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.397214] ? mtree_range_walk+0x632/0x900 [ 51.397833] ? mas_walk+0x5c7/0x7c0 [ 51.398356] do_vmi_munmap+0x1f1/0x2b0 [ 51.398893] mmap_region+0x1f9/0x2660 [ 51.399415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.399970] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.400754] ? __pfx_lock_acquire+0x10/0x10 [ 51.401345] ? __pfx_mmap_region+0x10/0x10 [ 51.401939] ? security_mmap_addr+0x7d/0xa0 [ 51.402516] ? get_unmapped_area+0x1f5/0x3f0 [ 51.403126] do_mmap+0x854/0xf00 [ 51.403608] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.404161] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.404774] ksys_mmap_pgoff+0x3af/0x500 [ 51.405328] do_syscall_64+0x3f/0x90 [ 51.405857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.406573] RIP: 0033:0x7f2759858d82 [ 51.407076] 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 [ 51.409433] RSP: 002b:00007fff5703e5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.410444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2759858d82 [ 51.411368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2758c92000 [ 51.412301] RBP: 00007f2758c92000 R08: 0000000000000009 R09: 0000000000001000 [ 51.413235] R10: 0000000000000812 R11: 0000000000000206 R12: 000055939d1f7ec0 [ 51.414195] R13: 00007fff5703e5f0 R14: 00007fff5703e620 R15: 00007fff5703e980 [ 51.415143] [ 51.415457] [ 51.415693] Allocated by task 211: [ 51.416155] kasan_save_stack+0x22/0x50 [ 51.416709] kasan_set_track+0x25/0x30 [ 51.417243] __kasan_slab_alloc+0x59/0x70 [ 51.417842] kmem_cache_alloc+0x16b/0x370 [ 51.418412] vm_area_dup+0x20/0x160 [ 51.418908] __split_vma+0x170/0x950 [ 51.419422] split_vma+0xc6/0x110 [ 51.419901] mprotect_fixup+0x8d2/0xb30 [ 51.420456] do_mprotect_pkey+0x87e/0xd40 [ 51.421035] __x64_sys_mprotect+0x78/0xc0 [ 51.421618] do_syscall_64+0x3f/0x90 [ 51.422136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.422841] [ 51.423078] Freed by task 211: [ 51.423510] kasan_save_stack+0x22/0x50 [ 51.424063] kasan_set_track+0x25/0x30 [ 51.424602] kasan_save_free_info+0x2b/0x50 [ 51.425187] __kasan_slab_free+0x10a/0x190 [ 51.425780] kmem_cache_free+0x10d/0x4d0 [ 51.426335] rcu_core+0x8c8/0x2860 [ 51.426823] __do_softirq+0x1b7/0x7d4 [ 51.427343] [ 51.427580] Last potentially related work creation: [ 51.428270] kasan_save_stack+0x22/0x50 [ 51.428826] __kasan_record_aux_stack+0x8e/0xa0 [ 51.429453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.430177] remove_vma+0x139/0x170 [ 51.430670] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.431281] do_vmi_munmap+0x1f1/0x2b0 [ 51.431816] __vm_munmap+0x138/0x3a0 [ 51.432322] __x64_sys_munmap+0x59/0x80 [ 51.432867] do_syscall_64+0x3f/0x90 [ 51.433384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.434089] [ 51.434325] Second to last potentially related work creation: [ 51.435074] kasan_save_stack+0x22/0x50 [ 51.435622] __kasan_record_aux_stack+0x8e/0xa0 [ 51.436254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.436961] remove_vma+0x139/0x170 [ 51.437452] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.438073] do_vmi_munmap+0x1f1/0x2b0 [ 51.438602] mmap_region+0x1f9/0x2660 [ 51.439122] do_mmap+0x854/0xf00 [ 51.439588] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.440124] ksys_mmap_pgoff+0x3af/0x500 [ 51.440681] do_syscall_64+0x3f/0x90 [ 51.441199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.441912] [ 51.442151] The buggy address belongs to the object at ffff88800c5aaae0 [ 51.442151] which belongs to the cache vm_area_struct of size 168 [ 51.443755] The buggy address is located 88 bytes inside of [ 51.443755] freed 168-byte region [ffff88800c5aaae0, ffff88800c5aab88) [ 51.445302] [ 51.445537] The buggy address belongs to the physical page: [ 51.446270] page:0000000020d892b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5aa [ 51.447464] memcg:ffff88800ded8f01 [ 51.447929] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.448641] page_type: 0xffffffff() [ 51.449131] raw: 0100000000000200 ffff88800879fc80 ffffea00003d8500 dead000000000002 [ 51.450153] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded8f01 [ 51.451140] page dumped because: kasan: bad access detected [ 51.451867] [ 51.452102] Memory state around the buggy address: [ 51.452737] ffff88800c5aaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.453677] ffff88800c5aaa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 51.454618] >ffff88800c5aab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.455549] ^ [ 51.456214] ffff88800c5aab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 51.457144] ffff88800c5aac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 51.458083] ================================================================== [ 51.459152] Disabling lock debugging due to kernel taint [ 54.353724] BUG: Bad rss-counter state mm:00000000bfc72d81 type:MM_FILEPAGES val:33 [ 54.354880] BUG: Bad rss-counter state mm:00000000bfc72d81 type:MM_ANONPAGES val:22 [ 54.745530] BUG: Bad rss-counter state mm:00000000dc1f35d6 type:MM_FILEPAGES val:33 [ 54.746513] BUG: Bad rss-counter state mm:00000000dc1f35d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53475' (ECDSA) to the list of known hosts. 2023/06/19 17:20:54 fuzzer started 2023/06/19 17:20:55 dialing manager at localhost:44161 2023/06/19 17:20:55 checking machine... 2023/06/19 17:20:55 checking revisions... [ 55.514341] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:20:55 testing simple program... [ 55.565195] cgroup: Unknown subsys name 'net' [ 55.601384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:42 Registers: info registers vcpu 0 RAX=000000000003de00 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=ffff88800e41f9c0 RSP=ffff88800e41f900 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=ffff88806ce3de20 R14=ffff88806ce3de20 R15=ffff88806ce3de00 RIP=ffffffff81806e10 RFL=00000082 [--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 00007f4b3cb29900 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=00007ffe68686000 CR3=000000000eff4000 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=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 info registers vcpu 1 RAX=0000000080000001 RBX=ffffea00006e8740 RCX=ffffffff8170baf7 RDX=ffff8880158fb680 RSI=0000000000000000 RDI=0000000000000007 RBP=ffffea00006e8708 RSP=ffff88800ed57940 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f8f8374f000 R14=ffff88801611ca70 R15=dffffc0000000000 RIP=ffffffff814c07eb 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 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=00007fedb9ce8810 CR3=000000000d9f4000 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=35fd881045f609a8c342240f8d3fa1c4 XMM02=ec2efd57dc4c00df0000000000120360 XMM03=5a2eb887970175160000000000120430 XMM04=7edcc8360f0d3a7c00000000000ae988 XMM05=751b9502027dc0b90000000000136348 XMM06=0d4ea4bf92d450a60000000000135520 XMM07=e042d86d42eb936e0000000000125a00 XMM08=5a2eb887970175160000000000120430 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000