syzkaller login: [ 30.166616] BUG: Bad rss-counter state mm:00000000d25e65dd type:MM_FILEPAGES val:33 [ 30.167630] BUG: Bad rss-counter state mm:00000000d25e65dd type:MM_ANONPAGES val:22 [ 30.352291] ================================================================== [ 30.353202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.354159] Read of size 8 at addr ffff888016970968 by task sshd/220 [ 30.354934] [ 30.355231] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.356148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.357108] Call Trace: [ 30.357426] <TASK> [ 30.357868] dump_stack_lvl+0x91/0xf0 [ 30.358519] print_report+0xcc/0x620 [ 30.359130] ? __virt_addr_valid+0x102/0x340 [ 30.359802] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360570] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361347] kasan_report+0xbe/0xf0 [ 30.361936] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.362724] vma_interval_tree_remove+0xc75/0xec0 [ 30.363484] vma_prepare+0xc54/0x11a0 [ 30.364069] __split_vma+0x5af/0x950 [ 30.364657] ? __pfx___split_vma+0x10/0x10 [ 30.365326] ? find_held_lock+0x2c/0x110 [ 30.365968] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.366702] ? lock_is_held_type+0x9f/0x120 [ 30.367289] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.367902] ? mtree_range_walk+0x632/0x900 [ 30.368483] ? mas_walk+0x5c7/0x7c0 [ 30.368960] do_vmi_munmap+0x1f1/0x2b0 [ 30.369467] mmap_region+0x1f9/0x2660 [ 30.369945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.370494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.371290] ? __pfx_lock_acquire+0x10/0x10 [ 30.371956] ? __pfx_mmap_region+0x10/0x10 [ 30.372613] ? security_mmap_addr+0x7d/0xa0 [ 30.373261] ? get_unmapped_area+0x1f5/0x3f0 [ 30.373944] do_mmap+0x854/0xf00 [ 30.374515] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.375114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.375816] ksys_mmap_pgoff+0x3af/0x500 [ 30.376435] do_syscall_64+0x3f/0x90 [ 30.377030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377832] RIP: 0033:0x7f6ca0fffd82 [ 30.378408] 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 [ 30.381048] RSP: 002b:00007ffc5318c108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.382176] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ca0fffd82 [ 30.383229] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ca0439000 [ 30.384277] RBP: 00007f6ca0439000 R08: 0000000000000009 R09: 0000000000001000 [ 30.385319] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ab8497f70 [ 30.386401] R13: 00007ffc5318c120 R14: 00007ffc5318c150 R15: 00007ffc5318c4b0 [ 30.387455] </TASK> [ 30.387820] [ 30.388092] Allocated by task 213: [ 30.388611] kasan_save_stack+0x22/0x50 [ 30.389239] kasan_set_track+0x25/0x30 [ 30.389837] __kasan_slab_alloc+0x59/0x70 [ 30.390510] kmem_cache_alloc+0x16b/0x370 [ 30.391153] vm_area_dup+0x20/0x160 [ 30.391698] __split_vma+0x170/0x950 [ 30.392284] split_vma+0xc6/0x110 [ 30.392812] mprotect_fixup+0x8d2/0xb30 [ 30.393445] do_mprotect_pkey+0x87e/0xd40 [ 30.394112] __x64_sys_mprotect+0x78/0xc0 [ 30.394750] do_syscall_64+0x3f/0x90 [ 30.395337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396123] [ 30.396380] Freed by task 213: [ 30.396945] kasan_save_stack+0x22/0x50 [ 30.397576] kasan_set_track+0x25/0x30 [ 30.398216] kasan_save_free_info+0x2b/0x50 [ 30.398868] __kasan_slab_free+0x10a/0x190 [ 30.399529] kmem_cache_free+0x10d/0x4d0 [ 30.400156] rcu_core+0x8c8/0x2860 [ 30.400705] __do_softirq+0x1b7/0x7d4 [ 30.401302] [ 30.401564] Last potentially related work creation: [ 30.402304] kasan_save_stack+0x22/0x50 [ 30.402910] __kasan_record_aux_stack+0x8e/0xa0 [ 30.403612] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.404407] remove_vma+0x139/0x170 [ 30.404960] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.405654] do_vmi_munmap+0x1f1/0x2b0 [ 30.406261] __vm_munmap+0x138/0x3a0 [ 30.406837] __x64_sys_munmap+0x59/0x80 [ 30.407466] do_syscall_64+0x3f/0x90 [ 30.408048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.408851] [ 30.409111] The buggy address belongs to the object at ffff888016970910 [ 30.409111] which belongs to the cache vm_area_struct of size 168 [ 30.410954] The buggy address is located 88 bytes inside of [ 30.410954] freed 168-byte region [ffff888016970910, ffff8880169709b8) [ 30.412677] [ 30.412940] The buggy address belongs to the physical page: [ 30.413761] page:000000000617e6eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16970 [ 30.415125] memcg:ffff8880103b2b01 [ 30.415660] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.416459] page_type: 0xffffffff() [ 30.417019] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.418159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880103b2b01 [ 30.419267] page dumped because: kasan: bad access detected [ 30.420075] [ 30.420331] Memory state around the buggy address: [ 30.421045] ffff888016970800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.422113] ffff888016970880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.423173] >ffff888016970900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.424204] ^ [ 30.425164] ffff888016970980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.426226] ffff888016970a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.427275] ================================================================== [ 30.428441] Disabling lock debugging due to kernel taint [ 32.602472] BUG: Bad rss-counter state mm:0000000078ef5cf5 type:MM_FILEPAGES val:33 [ 32.603478] BUG: Bad rss-counter state mm:0000000078ef5cf5 type:MM_ANONPAGES val:22 [ 33.196433] BUG: Bad rss-counter state mm:0000000057786d56 type:MM_FILEPAGES val:33 [ 33.197452] BUG: Bad rss-counter state mm:0000000057786d56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2032' (ECDSA) to the list of known hosts. 2023/06/21 10:28:11 fuzzer started 2023/06/21 10:28:12 dialing manager at localhost:36067 2023/06/21 10:28:12 checking machine... 2023/06/21 10:28:12 checking revisions... [ 33.851098] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:28:12 testing simple program... [ 33.896890] cgroup: Unknown subsys name 'net' [ 33.952457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:11 Registers: info registers vcpu 0 RAX=00005578b52080c5 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000015 RSI=0000000000000015 RDI=00005578b51cf400 RBP=00007f99e6165000 RSP=00007fffd074ff20 R8 =1017aee6bd4a2524 R9 =a80c1bad42865958 R10=44f79dc65827caea R11=00007fffd07503a0 R12=00005578b52080b0 R13=0000000000000015 R14=00005578b51cf400 R15=00000000000001e0 RIP=00007f99e60006b3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f99e5521900 00000000 00000000 GS =0000 0000000000000000 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=00007f99e49adc50 CR3=0000000013668000 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=5b3c0f2a66575e937f4a5f71fb1335eb XMM02=000000000011b9f8d59e07bde36eea69 XMM03=000000000011bb20ec2efd57dc4c00df XMM04=adaa873a2c7decdb00000000000ae988 XMM05=121443a7d8ba83d60000000000133770 XMM06=f2e468419b4db8170000000000132510 XMM07=fb795ef6d657705600000000001227f0 XMM08=2c67c8bc2e329bc3000000000011bb20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801937fd80 RCX=0000000000000000 RDX=0000000000000020 RSI=0000000000000000 RDI=ffff88801937fc60 RBP=0000000000000014 RSP=ffff88801937fbe0 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88801937fc48 R11=0000000000000000 R12=ffff8880199961c0 R13=dffffc0000000000 R14=ffff8880199961c0 R15=0000000000000000 RIP=ffffffff84513442 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 00007eff0eaa6900 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=00007eff0f05d618 CR3=000000000da04000 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=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