syzkaller login: [ 34.549726] BUG: Bad rss-counter state mm:0000000051f86f97 type:MM_FILEPAGES val:33 [ 34.550742] BUG: Bad rss-counter state mm:0000000051f86f97 type:MM_ANONPAGES val:22 [ 34.734018] ================================================================== [ 34.735167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.736133] Read of size 8 at addr ffff8880094a2d08 by task sshd/220 [ 34.736992] [ 34.737216] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.738084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.739076] Call Trace: [ 34.739404] [ 34.739693] dump_stack_lvl+0x91/0xf0 [ 34.740207] print_report+0xcc/0x620 [ 34.740709] ? __virt_addr_valid+0x102/0x340 [ 34.741276] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.741910] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.742533] kasan_report+0xbe/0xf0 [ 34.743018] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.743654] vma_interval_tree_remove+0xc75/0xec0 [ 34.744279] vma_prepare+0xc54/0x11a0 [ 34.744818] __split_vma+0x5af/0x950 [ 34.745340] ? __pfx___split_vma+0x10/0x10 [ 34.745933] ? find_held_lock+0x2c/0x110 [ 34.746508] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.747135] ? lock_is_held_type+0x9f/0x120 [ 34.747750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.748407] ? mtree_range_walk+0x632/0x900 [ 34.749050] ? mas_walk+0x5c7/0x7c0 [ 34.749558] do_vmi_munmap+0x1f1/0x2b0 [ 34.750112] mmap_region+0x1f9/0x2660 [ 34.750652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.751231] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.752048] ? __pfx_lock_acquire+0x10/0x10 [ 34.752655] ? __pfx_mmap_region+0x10/0x10 [ 34.753233] ? security_mmap_addr+0x7d/0xa0 [ 34.753802] ? get_unmapped_area+0x1f5/0x3f0 [ 34.754386] do_mmap+0x854/0xf00 [ 34.754855] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.755386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.756018] ksys_mmap_pgoff+0x3af/0x500 [ 34.756560] do_syscall_64+0x3f/0x90 [ 34.757076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.757778] RIP: 0033:0x7f0cac248d82 [ 34.758267] 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 [ 34.760647] RSP: 002b:00007ffcf0a67be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.761668] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cac248d82 [ 34.762668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cab682000 [ 34.763674] RBP: 00007f0cab682000 R08: 0000000000000009 R09: 0000000000001000 [ 34.764715] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cca2436f60 [ 34.765723] R13: 00007ffcf0a67c00 R14: 00007ffcf0a67c30 R15: 00007ffcf0a67f90 [ 34.766747] [ 34.767096] [ 34.767349] Allocated by task 213: [ 34.767877] kasan_save_stack+0x22/0x50 [ 34.768477] kasan_set_track+0x25/0x30 [ 34.769066] __kasan_slab_alloc+0x59/0x70 [ 34.769696] kmem_cache_alloc+0x16b/0x370 [ 34.770300] vm_area_dup+0x20/0x160 [ 34.770847] __split_vma+0x170/0x950 [ 34.771402] split_vma+0xc6/0x110 [ 34.771941] mprotect_fixup+0x8d2/0xb30 [ 34.772537] do_mprotect_pkey+0x87e/0xd40 [ 34.773154] __x64_sys_mprotect+0x78/0xc0 [ 34.773776] do_syscall_64+0x3f/0x90 [ 34.774331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.775097] [ 34.775352] Freed by task 213: [ 34.775869] kasan_save_stack+0x22/0x50 [ 34.776467] kasan_set_track+0x25/0x30 [ 34.777055] kasan_save_free_info+0x2b/0x50 [ 34.777686] __kasan_slab_free+0x10a/0x190 [ 34.778314] kmem_cache_free+0x10d/0x4d0 [ 34.778917] rcu_core+0x8c8/0x2860 [ 34.779444] __do_softirq+0x1b7/0x7d4 [ 34.780028] [ 34.780283] Last potentially related work creation: [ 34.780976] kasan_save_stack+0x22/0x50 [ 34.781578] __kasan_record_aux_stack+0x8e/0xa0 [ 34.782256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.783021] remove_vma+0x139/0x170 [ 34.783555] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.784243] do_vmi_munmap+0x1f1/0x2b0 [ 34.784825] __vm_munmap+0x138/0x3a0 [ 34.785382] __x64_sys_munmap+0x59/0x80 [ 34.785975] do_syscall_64+0x3f/0x90 [ 34.786538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.787303] [ 34.787563] The buggy address belongs to the object at ffff8880094a2cb0 [ 34.787563] which belongs to the cache vm_area_struct of size 168 [ 34.789325] The buggy address is located 88 bytes inside of [ 34.789325] freed 168-byte region [ffff8880094a2cb0, ffff8880094a2d58) [ 34.790955] [ 34.791186] The buggy address belongs to the physical page: [ 34.791909] page:000000009983bf6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94a2 [ 34.793066] memcg:ffff888016cea901 [ 34.793525] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.794217] page_type: 0xffffffff() [ 34.794734] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.795832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cea901 [ 34.796863] page dumped because: kasan: bad access detected [ 34.797612] [ 34.797854] Memory state around the buggy address: [ 34.798501] ffff8880094a2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.799467] ffff8880094a2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.800457] >ffff8880094a2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.801423] ^ [ 34.801920] ffff8880094a2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.802878] ffff8880094a2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.803853] ================================================================== [ 34.805043] Disabling lock debugging due to kernel taint [ 36.873648] BUG: Bad rss-counter state mm:00000000c821642b type:MM_FILEPAGES val:33 [ 36.875208] BUG: Bad rss-counter state mm:00000000c821642b type:MM_ANONPAGES val:22 [ 37.331980] BUG: Bad rss-counter state mm:0000000017db07bf type:MM_FILEPAGES val:33 [ 37.332848] BUG: Bad rss-counter state mm:0000000017db07bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29109' (ECDSA) to the list of known hosts. 2023/06/20 05:56:45 fuzzer started 2023/06/20 05:56:46 dialing manager at localhost:44161 2023/06/20 05:56:46 checking machine... 2023/06/20 05:56:46 checking revisions... [ 38.072387] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:56:46 testing simple program... [ 38.120087] cgroup: Unknown subsys name 'net' [ 38.158962] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:56:41 Registers: info registers vcpu 0 RAX=0000562de87ef4c0 RBX=0000562de87e6d60 RCX=0000562de87ed5f0 RDX=0000000000000003 RSI=0000000000000016 RDI=0000562de87ee2a0 RBP=0000000000000001 RSP=00007fff4c4a7230 R8 =0000000000000000 R9 =0000000000125c60 R10=0000000000000002 R11=00007fbc2e2bd6c8 R12=0000562de87ed5f0 R13=0000000000125c60 R14=0000000000125c60 R15=0000000000000000 RIP=00007fbc2f92f673 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 00007fbc2ed9d900 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=00007fbc2e1c1980 CR3=000000000d01a000 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=000000000011cdd0b3285ca56c489dff XMM01=8f99ba93fb45a9867541795a274c1c31 XMM02=000000000011d110ec2efd57dc4c00df XMM03=00000000001242e096b68efe02afd202 XMM04=42ad7b309e26412c00000000000ae988 XMM05=19e9129bd510f2350000000000134198 XMM06=4fda316b135da52b0000000000134020 XMM07=e042d86d42eb936e0000000000124560 XMM08=96b68efe02afd202000000000011d170 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc7970a3a8 CR3=0000000005482000 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=00007fa1d9a05510000055ea0fc78790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000