syzkaller login: [ 31.273608] BUG: Bad rss-counter state mm:00000000558db5dd type:MM_FILEPAGES val:33 [ 31.274696] BUG: Bad rss-counter state mm:00000000558db5dd type:MM_ANONPAGES val:22 [ 31.442912] ================================================================== [ 31.443814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.444899] Read of size 8 at addr ffff88800c6a8140 by task sshd/220 [ 31.445665] [ 31.445898] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.446756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.447730] Call Trace: [ 31.448060] [ 31.448339] dump_stack_lvl+0x91/0xf0 [ 31.448835] print_report+0xcc/0x620 [ 31.449314] ? __virt_addr_valid+0x102/0x340 [ 31.449902] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.450513] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.451151] kasan_report+0xbe/0xf0 [ 31.451722] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.452527] vma_interval_tree_remove+0xc75/0xec0 [ 31.453320] vma_prepare+0xc54/0x11a0 [ 31.453974] __split_vma+0x5af/0x950 [ 31.454615] ? __pfx___split_vma+0x10/0x10 [ 31.455323] ? find_held_lock+0x2c/0x110 [ 31.456011] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.456756] ? lock_is_held_type+0x9f/0x120 [ 31.457495] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.458300] ? mtree_range_walk+0x632/0x900 [ 31.459040] ? mas_walk+0x5c7/0x7c0 [ 31.459670] do_vmi_munmap+0x1f1/0x2b0 [ 31.460323] mmap_region+0x1f9/0x2660 [ 31.460963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.461671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.462631] ? __pfx_lock_acquire+0x10/0x10 [ 31.463351] ? __pfx_mmap_region+0x10/0x10 [ 31.464055] ? security_mmap_addr+0x7d/0xa0 [ 31.464771] ? get_unmapped_area+0x1f5/0x3f0 [ 31.465513] do_mmap+0x854/0xf00 [ 31.466096] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.466758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.467512] ksys_mmap_pgoff+0x3af/0x500 [ 31.468189] do_syscall_64+0x3f/0x90 [ 31.468830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.469699] RIP: 0033:0x7f3660b41d82 [ 31.470307] 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 [ 31.473145] RSP: 002b:00007ffc9a91d038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.474375] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3660b41d82 [ 31.475520] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f365ff7b000 [ 31.476646] RBP: 00007f365ff7b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.477796] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aee0680f60 [ 31.478926] R13: 00007ffc9a91d050 R14: 00007ffc9a91d080 R15: 00007ffc9a91d3e0 [ 31.480089] [ 31.480482] [ 31.480767] Allocated by task 213: [ 31.481342] kasan_save_stack+0x22/0x50 [ 31.482043] kasan_set_track+0x25/0x30 [ 31.482706] __kasan_slab_alloc+0x59/0x70 [ 31.483399] kmem_cache_alloc+0x16b/0x370 [ 31.484094] vm_area_dup+0x20/0x160 [ 31.484701] __split_vma+0x170/0x950 [ 31.485332] split_vma+0xc6/0x110 [ 31.485940] mprotect_fixup+0x8d2/0xb30 [ 31.486616] do_mprotect_pkey+0x87e/0xd40 [ 31.487322] __x64_sys_mprotect+0x78/0xc0 [ 31.488027] do_syscall_64+0x3f/0x90 [ 31.488662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.489527] [ 31.489810] Freed by task 213: [ 31.490332] kasan_save_stack+0x22/0x50 [ 31.490997] kasan_set_track+0x25/0x30 [ 31.491656] kasan_save_free_info+0x2b/0x50 [ 31.492374] __kasan_slab_free+0x10a/0x190 [ 31.493073] kmem_cache_free+0x10d/0x4d0 [ 31.493776] rcu_core+0x8c8/0x2860 [ 31.494384] __do_softirq+0x1b7/0x7d4 [ 31.495027] [ 31.495314] Last potentially related work creation: [ 31.496095] kasan_save_stack+0x22/0x50 [ 31.496764] __kasan_record_aux_stack+0x8e/0xa0 [ 31.497543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.498413] remove_vma+0x139/0x170 [ 31.499030] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.499791] do_vmi_munmap+0x1f1/0x2b0 [ 31.500455] __vm_munmap+0x138/0x3a0 [ 31.501077] __x64_sys_munmap+0x59/0x80 [ 31.501776] do_syscall_64+0x3f/0x90 [ 31.502420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.503288] [ 31.503570] The buggy address belongs to the object at ffff88800c6a80e8 [ 31.503570] which belongs to the cache vm_area_struct of size 168 [ 31.505533] The buggy address is located 88 bytes inside of [ 31.505533] freed 168-byte region [ffff88800c6a80e8, ffff88800c6a8190) [ 31.507421] [ 31.507703] The buggy address belongs to the physical page: [ 31.508580] page:00000000661a4037 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a8 [ 31.510052] memcg:ffff88800c5d1401 [ 31.510625] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.511490] page_type: 0xffffffff() [ 31.512095] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.513328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5d1401 [ 31.514565] page dumped because: kasan: bad access detected [ 31.515466] [ 31.515751] Memory state around the buggy address: [ 31.516541] ffff88800c6a8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.517633] ffff88800c6a8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.518479] >ffff88800c6a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.519312] ^ [ 31.519933] ffff88800c6a8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.520772] ffff88800c6a8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.521619] ================================================================== [ 31.522628] Disabling lock debugging due to kernel taint [ 33.635821] BUG: Bad rss-counter state mm:00000000fa840d90 type:MM_FILEPAGES val:33 [ 33.636810] BUG: Bad rss-counter state mm:00000000fa840d90 type:MM_ANONPAGES val:22 [ 34.112558] BUG: Bad rss-counter state mm:00000000242c321c type:MM_FILEPAGES val:33 [ 34.113808] BUG: Bad rss-counter state mm:00000000242c321c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62410' (ECDSA) to the list of known hosts. 2023/06/20 20:37:41 fuzzer started 2023/06/20 20:37:41 dialing manager at localhost:36067 2023/06/20 20:37:41 checking machine... 2023/06/20 20:37:41 checking revisions... [ 34.926535] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:37:42 testing simple program... [ 34.982049] cgroup: Unknown subsys name 'net' [ 35.024742] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:37:41 Registers: info registers vcpu 0 RAX=00000000000002f2 RBX=000055dc0a0b0400 RCX=0000000000132fd8 RDX=00007ffd2c108ee0 RSI=00007fa95c78bb00 RDI=000055dc0a0b0400 RBP=00007ffd2c108ed8 RSP=00007ffd2c108e60 R8 =0000000000000053 R9 =00000000000002f3 R10=0000000000000002 R11=00007fa95c810018 R12=00007fa95c78bad0 R13=00007fa95c80ffd8 R14=0000000000000002 R15=0000000000132fd8 RIP=00007fa95de77049 RFL=00000206 [-----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 00007fa95d2f2900 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=00007fa95c810020 CR3=0000000009a18000 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=00000000000fa0d05e5c10884646930b XMM01=536ecc3583241b88da43937864393cda XMM02=000000000011b0d0d59e07bde36eea69 XMM03=000000000011b1f8ec2efd57dc4c00df XMM04=169534079564f17f00000000000ae988 XMM05=4cab8fd0d4254f4d0000000000132ef0 XMM06=19e9129bd510f2350000000000131da8 XMM07=fb795ef6d65770560000000000121fd8 XMM08=2c67c8bc2e329bc3000000000011b1f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001f88863 RBX=ffff88800fc44000 RCX=0000000000000000 RDX=ffff88800c5e9b40 RSI=ffffffff83ab1a3f RDI=ffff88800fc44318 RBP=0000000000000000 RSP=ffff88800c697508 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000008 R11=0000091e0000091e R12=0000000000000000 R13=0000000000000008 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab1a52 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 00007f3d08715900 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=00007f3d08ccc618 CR3=000000000de0a000 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