syzkaller login: [ 38.765957] BUG: Bad rss-counter state mm:00000000900cab81 type:MM_FILEPAGES val:33 [ 38.766975] BUG: Bad rss-counter state mm:00000000900cab81 type:MM_ANONPAGES val:22 [ 38.940953] ================================================================== [ 38.941860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.942798] Read of size 8 at addr ffff88800e0186b0 by task sshd/220 [ 38.943715] [ 38.943935] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.944800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.945786] Call Trace: [ 38.946106] [ 38.946388] dump_stack_lvl+0x91/0xf0 [ 38.946875] print_report+0xcc/0x620 [ 38.947366] ? __virt_addr_valid+0x102/0x340 [ 38.947912] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948529] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949145] kasan_report+0xbe/0xf0 [ 38.949611] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.950219] vma_interval_tree_remove+0xc75/0xec0 [ 38.950824] vma_prepare+0xc54/0x11a0 [ 38.951332] __split_vma+0x5af/0x950 [ 38.951802] ? __pfx___split_vma+0x10/0x10 [ 38.952322] ? find_held_lock+0x2c/0x110 [ 38.952833] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.953394] ? lock_is_held_type+0x9f/0x120 [ 38.953937] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.954534] ? mtree_range_walk+0x632/0x900 [ 38.955079] ? mas_walk+0x5c7/0x7c0 [ 38.955563] do_vmi_munmap+0x1f1/0x2b0 [ 38.956052] mmap_region+0x1f9/0x2660 [ 38.956525] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.957042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.957741] ? __pfx_lock_acquire+0x10/0x10 [ 38.958273] ? __pfx_mmap_region+0x10/0x10 [ 38.958801] ? security_mmap_addr+0x7d/0xa0 [ 38.959331] ? get_unmapped_area+0x1f5/0x3f0 [ 38.959880] do_mmap+0x854/0xf00 [ 38.960319] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.960810] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.961362] ksys_mmap_pgoff+0x3af/0x500 [ 38.961861] do_syscall_64+0x3f/0x90 [ 38.962333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962972] RIP: 0033:0x7f210301ad82 [ 38.963443] 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 [ 38.965560] RSP: 002b:00007ffe5907c1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.966447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f210301ad82 [ 38.967304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2102454000 [ 38.968163] RBP: 00007f2102454000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969001] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563139b5aec0 [ 38.969847] R13: 00007ffe5907c1e0 R14: 00007ffe5907c210 R15: 00007ffe5907c570 [ 38.970693] [ 38.970984] [ 38.971196] Allocated by task 212: [ 38.971631] kasan_save_stack+0x22/0x50 [ 38.972143] kasan_set_track+0x25/0x30 [ 38.972627] __kasan_slab_alloc+0x59/0x70 [ 38.973151] kmem_cache_alloc+0x16b/0x370 [ 38.973662] vm_area_dup+0x20/0x160 [ 38.974117] __split_vma+0x170/0x950 [ 38.974578] split_vma+0xc6/0x110 [ 38.975010] mprotect_fixup+0x8d2/0xb30 [ 38.975543] do_mprotect_pkey+0x87e/0xd40 [ 38.976072] __x64_sys_mprotect+0x78/0xc0 [ 38.976601] do_syscall_64+0x3f/0x90 [ 38.977072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977721] [ 38.977939] Freed by task 212: [ 38.978340] kasan_save_stack+0x22/0x50 [ 38.978838] kasan_set_track+0x25/0x30 [ 38.979340] kasan_save_free_info+0x2b/0x50 [ 38.979865] __kasan_slab_free+0x10a/0x190 [ 38.980394] kmem_cache_free+0x10d/0x4d0 [ 38.980907] rcu_core+0x8c8/0x2860 [ 38.981345] __do_softirq+0x1b7/0x7d4 [ 38.981825] [ 38.982036] Last potentially related work creation: [ 38.982621] kasan_save_stack+0x22/0x50 [ 38.983127] __kasan_record_aux_stack+0x8e/0xa0 [ 38.983730] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.984374] remove_vma+0x139/0x170 [ 38.984816] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.985376] do_vmi_munmap+0x1f1/0x2b0 [ 38.985863] __vm_munmap+0x138/0x3a0 [ 38.986330] __x64_sys_munmap+0x59/0x80 [ 38.986822] do_syscall_64+0x3f/0x90 [ 38.987301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987938] [ 38.988152] Second to last potentially related work creation: [ 38.988833] kasan_save_stack+0x22/0x50 [ 38.989330] __kasan_record_aux_stack+0x8e/0xa0 [ 38.989901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.990539] remove_vma+0x139/0x170 [ 38.990990] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.991559] do_vmi_munmap+0x1f1/0x2b0 [ 38.992047] mmap_region+0x1f9/0x2660 [ 38.992525] do_mmap+0x854/0xf00 [ 38.992960] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.993453] ksys_mmap_pgoff+0x3af/0x500 [ 38.993949] do_syscall_64+0x3f/0x90 [ 38.994420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.995059] [ 38.995280] The buggy address belongs to the object at ffff88800e018658 [ 38.995280] which belongs to the cache vm_area_struct of size 168 [ 38.996736] The buggy address is located 88 bytes inside of [ 38.996736] freed 168-byte region [ffff88800e018658, ffff88800e018700) [ 38.998141] [ 38.998353] The buggy address belongs to the physical page: [ 38.999009] page:00000000fa3ef8fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe018 [ 39.000107] memcg:ffff88800e431e01 [ 39.000530] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.001168] page_type: 0xffffffff() [ 39.001616] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389080 dead000000000008 [ 39.002523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e431e01 [ 39.003440] page dumped because: kasan: bad access detected [ 39.004101] [ 39.004314] Memory state around the buggy address: [ 39.004889] ffff88800e018580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.005726] ffff88800e018600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.006570] >ffff88800e018680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.007419] ^ [ 39.007992] ffff88800e018700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.008863] ffff88800e018780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.009707] ================================================================== [ 39.010723] Disabling lock debugging due to kernel taint [ 41.959309] BUG: Bad rss-counter state mm:00000000045d7ce4 type:MM_FILEPAGES val:33 [ 41.960473] BUG: Bad rss-counter state mm:00000000045d7ce4 type:MM_ANONPAGES val:22 [ 42.338037] BUG: Bad rss-counter state mm:0000000018ffe2a1 type:MM_FILEPAGES val:33 [ 42.339046] BUG: Bad rss-counter state mm:0000000018ffe2a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21331' (ECDSA) to the list of known hosts. 2023/06/20 19:38:20 fuzzer started 2023/06/20 19:38:20 dialing manager at localhost:36067 2023/06/20 19:38:20 checking machine... 2023/06/20 19:38:20 checking revisions... [ 43.103236] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:38:20 testing simple program... [ 43.159407] cgroup: Unknown subsys name 'net' [ 43.209922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:38:20 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81b2a327 RDI=ffff88800debd482 RBP=ffff888015e9d1f0 RSP=ffff888006887728 R8 =0000000000000005 R9 =0000000000000083 R10=00000000000000a0 R11=0000000000000000 R12=ffff88800debd400 R13=00000000000000a0 R14=ffff888010184000 R15=ffff888015e9cf7c RIP=ffffffff814c0864 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6aff18b900 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=00007f6afe5d09f0 CR3=0000000013c0e000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c74bf536d535192100000000000ae988 XMM05=dc4963342d9f5e120000000000133880 XMM06=19e9129bd510f2350000000000132658 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe3efe37b8 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=00007fda44f4b5100000560910bb1790 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