syzkaller login: [ 30.452794] BUG: Bad rss-counter state mm:00000000913e386f type:MM_FILEPAGES val:33 [ 30.453825] BUG: Bad rss-counter state mm:00000000913e386f type:MM_ANONPAGES val:22 [ 30.610368] ================================================================== [ 30.611462] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.612768] Read of size 8 at addr ffff88800ca5a4e0 by task sshd/221 [ 30.613749] [ 30.614020] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.615083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.616293] Call Trace: [ 30.616683] [ 30.617080] dump_stack_lvl+0x91/0xf0 [ 30.617693] print_report+0xcc/0x620 [ 30.618209] ? __virt_addr_valid+0x102/0x340 [ 30.618762] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.619383] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.619994] kasan_report+0xbe/0xf0 [ 30.620471] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.621127] vma_interval_tree_remove+0xc75/0xec0 [ 30.621728] vma_prepare+0xc54/0x11a0 [ 30.622205] __split_vma+0x5af/0x950 [ 30.622685] ? __pfx___split_vma+0x10/0x10 [ 30.623214] ? find_held_lock+0x2c/0x110 [ 30.623729] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.624291] ? lock_is_held_type+0x9f/0x120 [ 30.624829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.625463] ? mtree_range_walk+0x632/0x900 [ 30.626018] ? mas_walk+0x5c7/0x7c0 [ 30.626495] do_vmi_munmap+0x1f1/0x2b0 [ 30.626985] mmap_region+0x1f9/0x2660 [ 30.627464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.627973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.628682] ? __pfx_lock_acquire+0x10/0x10 [ 30.629248] ? __pfx_mmap_region+0x10/0x10 [ 30.629776] ? security_mmap_addr+0x7d/0xa0 [ 30.630313] ? get_unmapped_area+0x1f5/0x3f0 [ 30.630863] do_mmap+0x854/0xf00 [ 30.631303] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.631795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.632354] ksys_mmap_pgoff+0x3af/0x500 [ 30.632854] do_syscall_64+0x3f/0x90 [ 30.633354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.634001] RIP: 0033:0x7f6fe89b2d82 [ 30.634461] 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 [ 30.636564] RSP: 002b:00007ffce371b658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.637509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6fe89b2d82 [ 30.638350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6fe7dec000 [ 30.639193] RBP: 00007f6fe7dec000 R08: 0000000000000009 R09: 0000000000001000 [ 30.640033] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cb05e1ec0 [ 30.640872] R13: 00007ffce371b670 R14: 00007ffce371b6a0 R15: 00007ffce371ba00 [ 30.641752] [ 30.642052] [ 30.642267] Allocated by task 214: [ 30.642694] kasan_save_stack+0x22/0x50 [ 30.643198] kasan_set_track+0x25/0x30 [ 30.643687] __kasan_slab_alloc+0x59/0x70 [ 30.644203] kmem_cache_alloc+0x16b/0x370 [ 30.644719] vm_area_dup+0x20/0x160 [ 30.645199] __split_vma+0x170/0x950 [ 30.645665] split_vma+0xc6/0x110 [ 30.646104] mprotect_fixup+0x8d2/0xb30 [ 30.646605] do_mprotect_pkey+0x87e/0xd40 [ 30.647124] __x64_sys_mprotect+0x78/0xc0 [ 30.647641] do_syscall_64+0x3f/0x90 [ 30.648118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.648761] [ 30.649007] Freed by task 214: [ 30.649401] kasan_save_stack+0x22/0x50 [ 30.649900] kasan_set_track+0x25/0x30 [ 30.650390] kasan_save_free_info+0x2b/0x50 [ 30.650918] __kasan_slab_free+0x10a/0x190 [ 30.651455] kmem_cache_free+0x10d/0x4d0 [ 30.651961] rcu_core+0x8c8/0x2860 [ 30.652418] __do_softirq+0x1b7/0x7d4 [ 30.652933] [ 30.653169] Last potentially related work creation: [ 30.653754] kasan_save_stack+0x22/0x50 [ 30.654261] __kasan_record_aux_stack+0x8e/0xa0 [ 30.654835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.655472] remove_vma+0x139/0x170 [ 30.655929] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.656495] do_vmi_munmap+0x1f1/0x2b0 [ 30.657013] __vm_munmap+0x138/0x3a0 [ 30.657476] __x64_sys_munmap+0x59/0x80 [ 30.657967] do_syscall_64+0x3f/0x90 [ 30.658439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659081] [ 30.659296] The buggy address belongs to the object at ffff88800ca5a488 [ 30.659296] which belongs to the cache vm_area_struct of size 168 [ 30.660775] The buggy address is located 88 bytes inside of [ 30.660775] freed 168-byte region [ffff88800ca5a488, ffff88800ca5a530) [ 30.662256] [ 30.662479] The buggy address belongs to the physical page: [ 30.663129] page:00000000f1bf8113 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca5a [ 30.664204] memcg:ffff8880094f1701 [ 30.664626] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.665307] page_type: 0xffffffff() [ 30.665756] raw: 0100000000000200 ffff8880087a0c80 ffffea000039d640 dead000000000002 [ 30.666677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094f1701 [ 30.667570] page dumped because: kasan: bad access detected [ 30.668223] [ 30.668437] Memory state around the buggy address: [ 30.669030] ffff88800ca5a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.669877] ffff88800ca5a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.670720] >ffff88800ca5a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.671570] ^ [ 30.672321] ffff88800ca5a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.673194] ffff88800ca5a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.674039] ================================================================== [ 30.675015] Disabling lock debugging due to kernel taint [ 33.177795] BUG: Bad rss-counter state mm:0000000081581c69 type:MM_FILEPAGES val:33 [ 33.178789] BUG: Bad rss-counter state mm:0000000081581c69 type:MM_ANONPAGES val:22 [ 33.642173] BUG: Bad rss-counter state mm:00000000931043c9 type:MM_FILEPAGES val:33 [ 33.643809] BUG: Bad rss-counter state mm:00000000931043c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58665' (ECDSA) to the list of known hosts. 2023/06/21 03:29:46 fuzzer started 2023/06/21 03:29:46 dialing manager at localhost:36067 2023/06/21 03:29:46 checking machine... 2023/06/21 03:29:46 checking revisions... [ 34.405689] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:29:46 testing simple program... [ 34.459555] cgroup: Unknown subsys name 'net' [ 34.508208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:45 Registers: info registers vcpu 0 RAX=000000000008b92e RBX=0000000000000001 RCX=ffffffff836827e5 RDX=000000000008b933 RSI=0000000000026827 RDI=ffffffff863b943a RBP=ffff888015f575d8 RSP=ffff888015f57510 R8 =ffffffff863b941c R9 =ffff888015f575c0 R10=0000000000038001 R11=000000000008b92e R12=ffff888015f575e0 R13=ffff888015f575c8 R14=ffff888015f575c1 R15=ffff888015f57580 RIP=ffffffff81130861 RFL=00000297 [--S-APC] 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 00007f56566fe700 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=00007f1d5a281bb0 CR3=000000000e6da000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035343a3932 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323236 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=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801479f380 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000000 RIP=ffffffff814c8597 RFL=00000286 [--S--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 00007f77b7d43900 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=00007fff4d593000 CR3=000000000df4e000 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=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