syzkaller login: [ 36.736677] BUG: Bad rss-counter state mm:0000000010923d61 type:MM_FILEPAGES val:33 [ 36.737965] BUG: Bad rss-counter state mm:0000000010923d61 type:MM_ANONPAGES val:22 [ 36.879132] ================================================================== [ 36.880034] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.880968] Read of size 8 at addr ffff888015a43798 by task sshd/220 [ 36.881741] [ 36.881960] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.882934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.883905] Call Trace: [ 36.884226] [ 36.884519] dump_stack_lvl+0x91/0xf0 [ 36.885008] print_report+0xcc/0x620 [ 36.885501] ? __virt_addr_valid+0x102/0x340 [ 36.886053] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.886700] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.887321] kasan_report+0xbe/0xf0 [ 36.887806] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.888427] vma_interval_tree_remove+0xc75/0xec0 [ 36.889042] vma_prepare+0xc54/0x11a0 [ 36.889518] __split_vma+0x5af/0x950 [ 36.889991] ? __pfx___split_vma+0x10/0x10 [ 36.890530] ? find_held_lock+0x2c/0x110 [ 36.891053] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.891612] ? lock_is_held_type+0x9f/0x120 [ 36.892155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.892765] ? mtree_range_walk+0x632/0x900 [ 36.893323] ? mas_walk+0x5c7/0x7c0 [ 36.893803] do_vmi_munmap+0x1f1/0x2b0 [ 36.894299] mmap_region+0x1f9/0x2660 [ 36.894788] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.895317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.896040] ? __pfx_lock_acquire+0x10/0x10 [ 36.896570] ? __pfx_mmap_region+0x10/0x10 [ 36.897105] ? security_mmap_addr+0x7d/0xa0 [ 36.897640] ? get_unmapped_area+0x1f5/0x3f0 [ 36.898191] do_mmap+0x854/0xf00 [ 36.898648] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.899146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.899712] ksys_mmap_pgoff+0x3af/0x500 [ 36.900218] do_syscall_64+0x3f/0x90 [ 36.900690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.901335] RIP: 0033:0x7fc014b55d82 [ 36.901797] 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 [ 36.903920] RSP: 002b:00007ffe1a4e0ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.904829] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc014b55d82 [ 36.905681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc013f8f000 [ 36.906544] RBP: 00007fc013f8f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.907404] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b43238f60 [ 36.908262] R13: 00007ffe1a4e0ee0 R14: 00007ffe1a4e0f10 R15: 00007ffe1a4e1270 [ 36.909121] [ 36.909413] [ 36.909629] Allocated by task 213: [ 36.910065] kasan_save_stack+0x22/0x50 [ 36.910572] kasan_set_track+0x25/0x30 [ 36.911067] __kasan_slab_alloc+0x59/0x70 [ 36.911588] kmem_cache_alloc+0x16b/0x370 [ 36.912104] vm_area_dup+0x20/0x160 [ 36.912555] __split_vma+0x170/0x950 [ 36.913023] split_vma+0xc6/0x110 [ 36.913458] mprotect_fixup+0x8d2/0xb30 [ 36.913953] do_mprotect_pkey+0x87e/0xd40 [ 36.914491] __x64_sys_mprotect+0x78/0xc0 [ 36.915023] do_syscall_64+0x3f/0x90 [ 36.915499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.916151] [ 36.916369] Freed by task 213: [ 36.916760] kasan_save_stack+0x22/0x50 [ 36.917270] kasan_set_track+0x25/0x30 [ 36.917768] kasan_save_free_info+0x2b/0x50 [ 36.918309] __kasan_slab_free+0x10a/0x190 [ 36.918868] kmem_cache_free+0x10d/0x4d0 [ 36.919381] rcu_core+0x8c8/0x2860 [ 36.919826] __do_softirq+0x1b7/0x7d4 [ 36.920307] [ 36.920529] Last potentially related work creation: [ 36.921119] kasan_save_stack+0x22/0x50 [ 36.921636] __kasan_record_aux_stack+0x8e/0xa0 [ 36.922211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.922858] remove_vma+0x139/0x170 [ 36.923316] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.923877] do_vmi_munmap+0x1f1/0x2b0 [ 36.924369] __vm_munmap+0x138/0x3a0 [ 36.924842] __x64_sys_munmap+0x59/0x80 [ 36.925351] do_syscall_64+0x3f/0x90 [ 36.925836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.926508] [ 36.926729] The buggy address belongs to the object at ffff888015a43740 [ 36.926729] which belongs to the cache vm_area_struct of size 168 [ 36.928205] The buggy address is located 88 bytes inside of [ 36.928205] freed 168-byte region [ffff888015a43740, ffff888015a437e8) [ 36.929606] [ 36.929820] The buggy address belongs to the physical page: [ 36.930483] page:0000000025bce806 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a43 [ 36.931608] memcg:ffff88800c66df01 [ 36.932033] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.932672] page_type: 0xffffffff() [ 36.933123] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.934035] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c66df01 [ 36.934955] page dumped because: kasan: bad access detected [ 36.935610] [ 36.935823] Memory state around the buggy address: [ 36.936396] ffff888015a43680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.937247] ffff888015a43700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.938097] >ffff888015a43780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.938943] ^ [ 36.939436] ffff888015a43800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.940291] ffff888015a43880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.941139] ================================================================== [ 36.942257] Disabling lock debugging due to kernel taint [ 39.233830] BUG: Bad rss-counter state mm:0000000017390fd4 type:MM_FILEPAGES val:33 [ 39.234888] BUG: Bad rss-counter state mm:0000000017390fd4 type:MM_ANONPAGES val:22 [ 39.685100] BUG: Bad rss-counter state mm:00000000f95e7146 type:MM_FILEPAGES val:33 [ 39.686747] BUG: Bad rss-counter state mm:00000000f95e7146 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60811' (ECDSA) to the list of known hosts. 2023/06/19 20:24:55 fuzzer started 2023/06/19 20:24:55 dialing manager at localhost:44161 2023/06/19 20:24:56 checking machine... 2023/06/19 20:24:56 checking revisions... [ 40.410116] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:24:56 testing simple program... [ 40.445638] cgroup: Unknown subsys name 'net' [ 40.491890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:24:48 Registers: info registers vcpu 0 RAX=000055ced68c50c0 RBX=000055ced68c50c0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000023 RDI=000055ced68c50c0 RBP=0000000000000001 RSP=00007ffdde1c92f8 R8 =000055ced68c9a0b R9 =00007f8fe783bbe0 R10=0000000000000100 R11=0000000000000246 R12=000055ced68bad00 R13=00007ffdde1c9308 R14=00007f8fe7264b22 R15=00007f8fe7289710 RIP=00007f8fe77dc4f1 RFL=00000283 [--S---C] 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 00007f8fe7289900 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=00007ffdde1c3000 CR3=000000000c638000 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=23232323232323232323232323232323 XMM01=00000000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=6e0909534e49474f4c5f4b4f5f474f4c XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffffffffffffffffffffff XMM08=6e0900534e49474f4c5f4b4f5f470000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007f8f62dfaa90 CR3=000000000f122000 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=4a9a74c490555d994e41e9cab3a80b33 XMM02=2c67c8bc2e329bc3000000000011c450 XMM03=fb795ef6d65770560000000000124060 XMM04=eed85e0cecdd8c6e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133bb0 XMM06=c291bd5c70af25b90000000000133a38 XMM07=e042d86d42eb936e00000000001242e0 XMM08=61fa157dfd0b528c000000000011c4b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000