syzkaller login: [ 31.745933] BUG: Bad rss-counter state mm:00000000d6cf8d8f type:MM_FILEPAGES val:33 [ 31.747137] BUG: Bad rss-counter state mm:00000000d6cf8d8f type:MM_ANONPAGES val:22 [ 31.782764] ================================================================== [ 31.783785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.784732] Read of size 8 at addr ffff888019db0d08 by task sshd/220 [ 31.785643] [ 31.785862] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.786734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.787925] Call Trace: [ 31.788314] [ 31.788655] dump_stack_lvl+0x91/0xf0 [ 31.789267] print_report+0xcc/0x620 [ 31.789845] ? __virt_addr_valid+0x102/0x340 [ 31.790509] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.791252] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.791982] kasan_report+0xbe/0xf0 [ 31.792555] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.793316] vma_interval_tree_remove+0xc75/0xec0 [ 31.794038] vma_prepare+0xc54/0x11a0 [ 31.794678] __split_vma+0x5af/0x950 [ 31.795299] ? __pfx___split_vma+0x10/0x10 [ 31.795996] ? find_held_lock+0x2c/0x110 [ 31.796673] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.797413] ? lock_is_held_type+0x9f/0x120 [ 31.797992] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.798628] ? mtree_range_walk+0x632/0x900 [ 31.799213] ? mas_walk+0x5c7/0x7c0 [ 31.799719] do_vmi_munmap+0x1f1/0x2b0 [ 31.800247] mmap_region+0x1f9/0x2660 [ 31.800757] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.801307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.802066] ? __pfx_lock_acquire+0x10/0x10 [ 31.802627] ? __pfx_mmap_region+0x10/0x10 [ 31.803197] ? security_mmap_addr+0x7d/0xa0 [ 31.803757] ? get_unmapped_area+0x1f5/0x3f0 [ 31.804340] do_mmap+0x854/0xf00 [ 31.804816] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.805340] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.805934] ksys_mmap_pgoff+0x3af/0x500 [ 31.806477] do_syscall_64+0x3f/0x90 [ 31.806987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.807669] RIP: 0033:0x7f676f8c9d82 [ 31.808152] 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 [ 31.810470] RSP: 002b:00007ffd61e58428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.811442] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f676f8c9d82 [ 31.812352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f676ed03000 [ 31.813257] RBP: 00007f676ed03000 R08: 0000000000000009 R09: 0000000000001000 [ 31.814175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055720a51aec0 [ 31.815082] R13: 00007ffd61e58440 R14: 00007ffd61e58470 R15: 00007ffd61e587d0 [ 31.816006] [ 31.816315] [ 31.816545] Allocated by task 213: [ 31.817008] kasan_save_stack+0x22/0x50 [ 31.817548] kasan_set_track+0x25/0x30 [ 31.818069] __kasan_slab_alloc+0x59/0x70 [ 31.818619] kmem_cache_alloc+0x16b/0x370 [ 31.819170] vm_area_dup+0x20/0x160 [ 31.819655] __split_vma+0x170/0x950 [ 31.820150] split_vma+0xc6/0x110 [ 31.820621] mprotect_fixup+0x8d2/0xb30 [ 31.821165] do_mprotect_pkey+0x87e/0xd40 [ 31.821721] __x64_sys_mprotect+0x78/0xc0 [ 31.822282] do_syscall_64+0x3f/0x90 [ 31.822787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.823463] [ 31.823692] Freed by task 213: [ 31.824108] kasan_save_stack+0x22/0x50 [ 31.824641] kasan_set_track+0x25/0x30 [ 31.825171] kasan_save_free_info+0x2b/0x50 [ 31.825742] __kasan_slab_free+0x10a/0x190 [ 31.826306] kmem_cache_free+0x10d/0x4d0 [ 31.826844] rcu_core+0x8c8/0x2860 [ 31.827318] __do_softirq+0x1b7/0x7d4 [ 31.827827] [ 31.828056] Last potentially related work creation: [ 31.828680] kasan_save_stack+0x22/0x50 [ 31.829230] __kasan_record_aux_stack+0x8e/0xa0 [ 31.829841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.830529] remove_vma+0x139/0x170 [ 31.831019] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.831614] do_vmi_munmap+0x1f1/0x2b0 [ 31.832134] __vm_munmap+0x138/0x3a0 [ 31.832629] __x64_sys_munmap+0x59/0x80 [ 31.833155] do_syscall_64+0x3f/0x90 [ 31.833668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.834359] [ 31.834584] The buggy address belongs to the object at ffff888019db0cb0 [ 31.834584] which belongs to the cache vm_area_struct of size 168 [ 31.836158] The buggy address is located 88 bytes inside of [ 31.836158] freed 168-byte region [ffff888019db0cb0, ffff888019db0d58) [ 31.837682] [ 31.837911] The buggy address belongs to the physical page: [ 31.838614] page:00000000ef55555b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db0 [ 31.839774] memcg:ffff88800cbec901 [ 31.840223] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.840934] page_type: 0xffffffff() [ 31.841406] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4440 dead000000000002 [ 31.842398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbec901 [ 31.843377] page dumped because: kasan: bad access detected [ 31.844072] [ 31.844296] Memory state around the buggy address: [ 31.844920] ffff888019db0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.845837] ffff888019db0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.846759] >ffff888019db0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.847677] ^ [ 31.848145] ffff888019db0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.849076] ffff888019db0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.849989] ================================================================== [ 31.851108] Disabling lock debugging due to kernel taint [ 33.819574] BUG: Bad rss-counter state mm:00000000e5fdff7e type:MM_FILEPAGES val:33 [ 33.820884] BUG: Bad rss-counter state mm:00000000e5fdff7e type:MM_ANONPAGES val:22 [ 34.323143] BUG: Bad rss-counter state mm:00000000d0094ae1 type:MM_FILEPAGES val:33 [ 34.324302] BUG: Bad rss-counter state mm:00000000d0094ae1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13531' (ECDSA) to the list of known hosts. 2023/06/20 21:38:37 fuzzer started 2023/06/20 21:38:37 dialing manager at localhost:36067 2023/06/20 21:38:37 checking machine... 2023/06/20 21:38:37 checking revisions... [ 35.029218] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:38:37 testing simple program... [ 35.080423] cgroup: Unknown subsys name 'net' [ 35.133007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:38:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110039c8f60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801ce47af0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856cd6a0 R15=0000000000000000 RIP=ffffffff812d8f0e RFL=00000256 [---ZAP-] 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 00007fe08c45c900 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=00007fe08ca140b0 CR3=000000000dd16000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801ae69080 RCX=ffffffff844f4321 RDX=ffff888008d69b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888008d7f030 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=1ffff110011afe17 R13=0000000000001a00 R14=ffff888008d7f0d8 R15=0000000000000001 RIP=ffffffff814c086b RFL=00000046 [---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 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=00007fe08c38b000 CR3=000000000d92c000 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=6576652d7372656b726f772d6c6c696b XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=ffffffff000000020000561d36861e80 XMM05=00000000000000000000000000000000 XMM06=0000561d3683709000000000ffffffff XMM07=00000000000000000000000000000000 XMM08=00000000000000310000000000000180 XMM09=00000000000000000000000000000000 XMM10=00000020000000000000002000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000