syzkaller login: [ 28.660402] BUG: Bad rss-counter state mm:0000000022387e49 type:MM_FILEPAGES val:33 [ 28.661583] BUG: Bad rss-counter state mm:0000000022387e49 type:MM_ANONPAGES val:22 [ 28.856218] ================================================================== [ 28.857307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.858606] Read of size 8 at addr ffff88800f2005c8 by task sshd/221 [ 28.859546] [ 28.859806] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.860851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.861848] Call Trace: [ 28.862176] [ 28.862557] dump_stack_lvl+0x91/0xf0 [ 28.863036] print_report+0xcc/0x620 [ 28.863503] ? __virt_addr_valid+0x102/0x340 [ 28.864042] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.864642] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.865249] kasan_report+0xbe/0xf0 [ 28.865714] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866327] vma_interval_tree_remove+0xc75/0xec0 [ 28.866916] vma_prepare+0xc54/0x11a0 [ 28.867382] __split_vma+0x5af/0x950 [ 28.867842] ? __pfx___split_vma+0x10/0x10 [ 28.868357] ? find_held_lock+0x2c/0x110 [ 28.868862] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.869417] ? lock_is_held_type+0x9f/0x120 [ 28.869980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.870610] ? mtree_range_walk+0x632/0x900 [ 28.871177] ? mas_walk+0x5c7/0x7c0 [ 28.871650] do_vmi_munmap+0x1f1/0x2b0 [ 28.872143] mmap_region+0x1f9/0x2660 [ 28.872631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.873154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.873880] ? __pfx_lock_acquire+0x10/0x10 [ 28.874428] ? __pfx_mmap_region+0x10/0x10 [ 28.874965] ? security_mmap_addr+0x7d/0xa0 [ 28.875499] ? get_unmapped_area+0x1f5/0x3f0 [ 28.876045] do_mmap+0x854/0xf00 [ 28.876475] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.876961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.877516] ksys_mmap_pgoff+0x3af/0x500 [ 28.878015] do_syscall_64+0x3f/0x90 [ 28.878484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.879117] RIP: 0033:0x7fa9080b5d82 [ 28.879560] 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 [ 28.881650] RSP: 002b:00007ffd7638d568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.882560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9080b5d82 [ 28.883397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9074ef000 [ 28.884225] RBP: 00007fa9074ef000 R08: 0000000000000009 R09: 0000000000001000 [ 28.885047] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597da61ff60 [ 28.885869] R13: 00007ffd7638d580 R14: 00007ffd7638d5b0 R15: 00007ffd7638d910 [ 28.886705] [ 28.886989] [ 28.887199] Allocated by task 212: [ 28.887619] kasan_save_stack+0x22/0x50 [ 28.888108] kasan_set_track+0x25/0x30 [ 28.888610] __kasan_slab_alloc+0x59/0x70 [ 28.889144] kmem_cache_alloc+0x16b/0x370 [ 28.889669] vm_area_dup+0x20/0x160 [ 28.890141] __split_vma+0x170/0x950 [ 28.890605] split_vma+0xc6/0x110 [ 28.891053] mprotect_fixup+0x8d2/0xb30 [ 28.891558] do_mprotect_pkey+0x87e/0xd40 [ 28.892081] __x64_sys_mprotect+0x78/0xc0 [ 28.892608] do_syscall_64+0x3f/0x90 [ 28.893092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.893738] [ 28.893952] Freed by task 212: [ 28.894353] kasan_save_stack+0x22/0x50 [ 28.894845] kasan_set_track+0x25/0x30 [ 28.895334] kasan_save_free_info+0x2b/0x50 [ 28.895862] __kasan_slab_free+0x10a/0x190 [ 28.896388] kmem_cache_free+0x10d/0x4d0 [ 28.896886] rcu_core+0x8c8/0x2860 [ 28.897323] __do_softirq+0x1b7/0x7d4 [ 28.897804] [ 28.898019] Last potentially related work creation: [ 28.898678] kasan_save_stack+0x22/0x50 [ 28.899176] __kasan_record_aux_stack+0x8e/0xa0 [ 28.899744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.900381] remove_vma+0x139/0x170 [ 28.900832] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.901376] do_vmi_munmap+0x1f1/0x2b0 [ 28.901860] __vm_munmap+0x138/0x3a0 [ 28.902335] __x64_sys_munmap+0x59/0x80 [ 28.902839] do_syscall_64+0x3f/0x90 [ 28.903309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903946] [ 28.904156] The buggy address belongs to the object at ffff88800f200570 [ 28.904156] which belongs to the cache vm_area_struct of size 168 [ 28.905603] The buggy address is located 88 bytes inside of [ 28.905603] freed 168-byte region [ffff88800f200570, ffff88800f200618) [ 28.906991] [ 28.907204] The buggy address belongs to the physical page: [ 28.907856] page:0000000026f4a52e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf200 [ 28.908919] memcg:ffff88800d1b0d01 [ 28.909339] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.910030] page_type: 0xffffffff() [ 28.910490] raw: 0100000000000200 ffff8880087a0c80 ffffea0000406e00 dead000000000007 [ 28.911392] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1b0d01 [ 28.912292] page dumped because: kasan: bad access detected [ 28.912952] [ 28.913175] Memory state around the buggy address: [ 28.913749] ffff88800f200480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.914609] ffff88800f200500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.915463] >ffff88800f200580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.916305] ^ [ 28.916961] ffff88800f200600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 28.917805] ffff88800f200680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.918655] ================================================================== [ 28.919573] Disabling lock debugging due to kernel taint [ 31.288879] BUG: Bad rss-counter state mm:00000000c4f69f87 type:MM_FILEPAGES val:33 [ 31.290056] BUG: Bad rss-counter state mm:00000000c4f69f87 type:MM_ANONPAGES val:22 [ 31.744988] BUG: Bad rss-counter state mm:00000000d1b1bb0e type:MM_FILEPAGES val:33 [ 31.746299] BUG: Bad rss-counter state mm:00000000d1b1bb0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43950' (ECDSA) to the list of known hosts. 2023/06/20 19:20:49 fuzzer started 2023/06/20 19:20:49 dialing manager at localhost:36067 2023/06/20 19:20:49 checking machine... 2023/06/20 19:20:49 checking revisions... [ 32.451596] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:20:50 testing simple program... [ 32.503294] cgroup: Unknown subsys name 'net' [ 32.541814] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:20:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd53991fd8 CR3=0000000005482000 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=00007f89e9f8b510000055eda25d1790 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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880145e7858 RSP=ffff8880145e7740 R8 =ffffffff8608a55a R9 =ffff8880145e7840 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880145e7860 R13=ffff8880145e7848 R14=0000000000000004 R15=ffff8880145e7800 RIP=ffffffff81130b1f RFL=00000293 [--S-A-C] 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 00007f9faeb63900 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=00007fd27896d650 CR3=000000000d794000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f6d4c044c1dc688d00000000000ae988 XMM05=993df4330d6440560000000000133830 XMM06=7626cb308231cbe800000000001325d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000