syzkaller login: [ 32.601857] BUG: Bad rss-counter state mm:00000000d177e408 type:MM_FILEPAGES val:33 [ 32.603089] BUG: Bad rss-counter state mm:00000000d177e408 type:MM_ANONPAGES val:22 [ 32.784564] ================================================================== [ 32.785606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.786803] Read of size 8 at addr ffff888016f5ddf0 by task sshd/221 [ 32.787689] [ 32.787937] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.788921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.789988] Call Trace: [ 32.790342] [ 32.790678] dump_stack_lvl+0x91/0xf0 [ 32.791226] print_report+0xcc/0x620 [ 32.791762] ? __virt_addr_valid+0x102/0x340 [ 32.792376] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.793054] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.793738] kasan_report+0xbe/0xf0 [ 32.794258] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.794940] vma_interval_tree_remove+0xc75/0xec0 [ 32.795598] vma_prepare+0xc54/0x11a0 [ 32.796118] __split_vma+0x5af/0x950 [ 32.796656] ? __pfx___split_vma+0x10/0x10 [ 32.797257] ? find_held_lock+0x2c/0x110 [ 32.797850] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.798493] ? lock_is_held_type+0x9f/0x120 [ 32.799161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.799844] ? mtree_range_walk+0x632/0x900 [ 32.800493] ? mas_walk+0x5c7/0x7c0 [ 32.801013] do_vmi_munmap+0x1f1/0x2b0 [ 32.801562] mmap_region+0x1f9/0x2660 [ 32.802105] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.802693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.803478] ? __pfx_lock_acquire+0x10/0x10 [ 32.804077] ? __pfx_mmap_region+0x10/0x10 [ 32.804680] ? security_mmap_addr+0x7d/0xa0 [ 32.805270] ? get_unmapped_area+0x1f5/0x3f0 [ 32.805893] do_mmap+0x854/0xf00 [ 32.806394] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.806959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.807605] ksys_mmap_pgoff+0x3af/0x500 [ 32.808184] do_syscall_64+0x3f/0x90 [ 32.808729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.809468] RIP: 0033:0x7fbaf0dc3d82 [ 32.809985] 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 [ 32.812429] RSP: 002b:00007ffc57960b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.813460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbaf0dc3d82 [ 32.814429] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbaf01fd000 [ 32.815392] RBP: 00007fbaf01fd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.816350] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e6dbc2ec0 [ 32.817307] R13: 00007ffc57960b40 R14: 00007ffc57960b70 R15: 00007ffc57960ed0 [ 32.818262] [ 32.818591] [ 32.818844] Allocated by task 214: [ 32.819326] kasan_save_stack+0x22/0x50 [ 32.819892] kasan_set_track+0x25/0x30 [ 32.820451] __kasan_slab_alloc+0x59/0x70 [ 32.821046] kmem_cache_alloc+0x16b/0x370 [ 32.821631] vm_area_dup+0x20/0x160 [ 32.822141] __split_vma+0x170/0x950 [ 32.822686] split_vma+0xc6/0x110 [ 32.823177] mprotect_fixup+0x8d2/0xb30 [ 32.823744] do_mprotect_pkey+0x87e/0xd40 [ 32.824329] __x64_sys_mprotect+0x78/0xc0 [ 32.824913] do_syscall_64+0x3f/0x90 [ 32.825448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.826170] [ 32.826417] Freed by task 204: [ 32.826872] kasan_save_stack+0x22/0x50 [ 32.827445] kasan_set_track+0x25/0x30 [ 32.827999] kasan_save_free_info+0x2b/0x50 [ 32.828601] __kasan_slab_free+0x10a/0x190 [ 32.829193] kmem_cache_free+0x10d/0x4d0 [ 32.829773] rcu_core+0x8c8/0x2860 [ 32.830275] __do_softirq+0x1b7/0x7d4 [ 32.830836] [ 32.831077] Last potentially related work creation: [ 32.831741] kasan_save_stack+0x22/0x50 [ 32.832306] __kasan_record_aux_stack+0x8e/0xa0 [ 32.832952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.833670] remove_vma+0x139/0x170 [ 32.834172] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.834814] do_vmi_munmap+0x1f1/0x2b0 [ 32.835361] __vm_munmap+0x138/0x3a0 [ 32.835879] __x64_sys_munmap+0x59/0x80 [ 32.836440] do_syscall_64+0x3f/0x90 [ 32.836971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837686] [ 32.837924] The buggy address belongs to the object at ffff888016f5dd98 [ 32.837924] which belongs to the cache vm_area_struct of size 168 [ 32.839578] The buggy address is located 88 bytes inside of [ 32.839578] freed 168-byte region [ffff888016f5dd98, ffff888016f5de40) [ 32.841143] [ 32.841385] The buggy address belongs to the physical page: [ 32.842116] page:000000008581763d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f5d [ 32.843364] memcg:ffff88800f600a01 [ 32.843842] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.844560] page_type: 0xffffffff() [ 32.845060] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.846096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f600a01 [ 32.847132] page dumped because: kasan: bad access detected [ 32.847865] [ 32.848106] Memory state around the buggy address: [ 32.848750] ffff888016f5dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.849708] ffff888016f5dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.850696] >ffff888016f5dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.851640] ^ [ 32.852545] ffff888016f5de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.853496] ffff888016f5de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.854435] ================================================================== [ 32.855689] Disabling lock debugging due to kernel taint [ 34.967697] BUG: Bad rss-counter state mm:00000000d7af022f type:MM_FILEPAGES val:33 [ 34.968857] BUG: Bad rss-counter state mm:00000000d7af022f type:MM_ANONPAGES val:22 [ 35.397169] BUG: Bad rss-counter state mm:00000000b43f2180 type:MM_FILEPAGES val:33 [ 35.398080] BUG: Bad rss-counter state mm:00000000b43f2180 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34943' (ECDSA) to the list of known hosts. 2023/06/20 00:19:27 fuzzer started 2023/06/20 00:19:27 dialing manager at localhost:44161 2023/06/20 00:19:27 checking machine... 2023/06/20 00:19:27 checking revisions... [ 36.178309] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:19:27 testing simple program... [ 36.224796] cgroup: Unknown subsys name 'net' [ 36.261138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:19:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88801423fcb8 RSI=ffff88801423fc80 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a85c R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801422b680 R15=ffff88806ce09a98 RIP=ffffffff81130937 RFL=00000296 [--S-AP-] 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 00007f1a80b9a900 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=00007f1a7ffde050 CR3=000000000d69c000 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=8d238a4c38c3d08e6a4e8c9df7924800 XMM02=ec2efd57dc4c00df000000000011ce38 XMM03=b106913894dfe74b000000000011cf08 XMM04=e119248376b6721b00000000000ae988 XMM05=5a8b74b5b61ce5f800000000001353f8 XMM06=c291bd5c70af25b900000000001341e8 XMM07=fb795ef6d65770560000000000124750 XMM08=2c67c8bc2e329bc3000000000011cea8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000000b RCX=ffffffff83148ae1 RDX=ffff888018ee9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016847ab0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ce63600 R13=ffff888016847b38 R14=ffff888016847b38 R15=00000000000000e6 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 00007f26b3856900 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=00007fff7d16e000 CR3=000000000dcf0000 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=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