syzkaller login: [ 38.805103] BUG: Bad rss-counter state mm:000000005878343a type:MM_FILEPAGES val:33 [ 38.805912] BUG: Bad rss-counter state mm:000000005878343a type:MM_ANONPAGES val:22 [ 38.847054] ================================================================== [ 38.850200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.852588] Read of size 8 at addr ffff888019ebac20 by task sshd/219 [ 38.854622] [ 38.855190] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.857408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.859850] Call Trace: [ 38.860595] [ 38.861322] dump_stack_lvl+0x91/0xf0 [ 38.862506] print_report+0xcc/0x620 [ 38.862842] ? __virt_addr_valid+0x102/0x340 [ 38.863618] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.864128] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.864631] kasan_report+0xbe/0xf0 [ 38.865049] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.865565] vma_interval_tree_remove+0xc75/0xec0 [ 38.866095] vma_prepare+0xc54/0x11a0 [ 38.866506] __split_vma+0x5af/0x950 [ 38.866847] ? __pfx___split_vma+0x10/0x10 [ 38.867274] ? find_held_lock+0x2c/0x110 [ 38.867705] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.868814] ? lock_is_held_type+0x9f/0x120 [ 38.870088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.871436] ? mtree_range_walk+0x632/0x900 [ 38.872515] ? mas_walk+0x5c7/0x7c0 [ 38.873515] do_vmi_munmap+0x1f1/0x2b0 [ 38.874575] mmap_region+0x1f9/0x2660 [ 38.875599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.876717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.878302] ? __pfx_lock_acquire+0x10/0x10 [ 38.879503] ? __pfx_mmap_region+0x10/0x10 [ 38.880730] ? security_mmap_addr+0x7d/0xa0 [ 38.883936] ? get_unmapped_area+0x1f5/0x3f0 [ 38.884377] do_mmap+0x854/0xf00 [ 38.884738] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.885243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.885679] ksys_mmap_pgoff+0x3af/0x500 [ 38.886153] do_syscall_64+0x3f/0x90 [ 38.886807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887473] RIP: 0033:0x7f7d45d70d82 [ 38.888094] 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 [ 38.890894] RSP: 002b:00007ffff8dd0b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.891773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d45d70d82 [ 38.892765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d451aa000 [ 38.893589] RBP: 00007f7d451aa000 R08: 0000000000000009 R09: 0000000000001000 [ 38.894385] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2fbfa1980 [ 38.899809] R13: 00007ffff8dd0b80 R14: 00007ffff8dd0bb0 R15: 00007ffff8dd0f10 [ 38.900465] [ 38.900698] [ 38.900862] Allocated by task 212: [ 38.901180] kasan_save_stack+0x22/0x50 [ 38.901566] kasan_set_track+0x25/0x30 [ 38.901987] __kasan_slab_alloc+0x59/0x70 [ 38.902390] kmem_cache_alloc+0x16b/0x370 [ 38.902818] vm_area_dup+0x20/0x160 [ 38.903161] __split_vma+0x170/0x950 [ 38.903511] split_vma+0xc6/0x110 [ 38.904006] mprotect_fixup+0x8d2/0xb30 [ 38.904541] do_mprotect_pkey+0x87e/0xd40 [ 38.905074] __x64_sys_mprotect+0x78/0xc0 [ 38.905623] do_syscall_64+0x3f/0x90 [ 38.906190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906840] [ 38.906995] Freed by task 13: [ 38.907374] kasan_save_stack+0x22/0x50 [ 38.907922] kasan_set_track+0x25/0x30 [ 38.908336] kasan_save_free_info+0x2b/0x50 [ 38.908925] __kasan_slab_free+0x10a/0x190 [ 38.909343] kmem_cache_free+0x10d/0x4d0 [ 38.910011] rcu_core+0x8c8/0x2860 [ 38.910405] __do_softirq+0x1b7/0x7d4 [ 38.910818] [ 38.911012] Last potentially related work creation: [ 38.911506] kasan_save_stack+0x22/0x50 [ 38.912094] __kasan_record_aux_stack+0x8e/0xa0 [ 38.915958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.916476] remove_vma+0x139/0x170 [ 38.917012] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918369] do_vmi_munmap+0x1f1/0x2b0 [ 38.918867] __vm_munmap+0x138/0x3a0 [ 38.919327] __x64_sys_munmap+0x59/0x80 [ 38.919801] do_syscall_64+0x3f/0x90 [ 38.920418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924648] [ 38.924850] The buggy address belongs to the object at ffff888019ebabc8 [ 38.924850] which belongs to the cache vm_area_struct of size 168 [ 38.926277] The buggy address is located 88 bytes inside of [ 38.926277] freed 168-byte region [ffff888019ebabc8, ffff888019ebac70) [ 38.927346] [ 38.927560] The buggy address belongs to the physical page: [ 38.928320] page:0000000068f3d1ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eba [ 38.929341] memcg:ffff888019eb2201 [ 38.929727] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.930334] page_type: 0xffffffff() [ 38.930746] raw: 0100000000000200 ffff8880087a0c80 ffffea0000355c40 dead000000000002 [ 38.931625] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eb2201 [ 38.932999] page dumped because: kasan: bad access detected [ 38.933536] [ 38.933693] Memory state around the buggy address: [ 38.934096] ffff888019ebab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.934679] ffff888019ebab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.935262] >ffff888019ebac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.935891] ^ [ 38.936279] ffff888019ebac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.936932] ffff888019ebad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.937568] ================================================================== [ 38.938356] Disabling lock debugging due to kernel taint [ 41.786017] BUG: Bad rss-counter state mm:000000009ef7b355 type:MM_FILEPAGES val:33 [ 41.786738] BUG: Bad rss-counter state mm:000000009ef7b355 type:MM_ANONPAGES val:22 [ 42.289751] BUG: Bad rss-counter state mm:00000000b4514553 type:MM_FILEPAGES val:33 [ 42.290413] BUG: Bad rss-counter state mm:00000000b4514553 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9056' (ECDSA) to the list of known hosts. 2023/06/21 08:16:28 fuzzer started 2023/06/21 08:16:28 dialing manager at localhost:36067 2023/06/21 08:16:28 checking machine... 2023/06/21 08:16:28 checking revisions... [ 43.083174] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:16:28 testing simple program... [ 43.137969] cgroup: Unknown subsys name 'net' [ 43.205618] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:28 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff888009c10000 RCX=0000000000000100 RDX=1ffff11001382208 RSI=ffffffff83018a8f RDI=000000000000000a RBP=0000000000000083 RSP=ffff88806ce09eb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff888009c11040 R15=000000000000000a RIP=ffffffff83018ab7 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 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=00007f5a28801328 CR3=000000000e220000 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=36313a3830203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=000055befaadb4d0 CR3=00000000168ac000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000