syzkaller login: [ 44.101169] BUG: Bad rss-counter state mm:00000000de7603c7 type:MM_FILEPAGES val:33 [ 44.101886] BUG: Bad rss-counter state mm:00000000de7603c7 type:MM_ANONPAGES val:22 [ 44.295484] ================================================================== [ 44.296067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.296661] Read of size 8 at addr ffff88800ddcb6b0 by task sshd/220 [ 44.297145] [ 44.297287] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.299107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.299718] Call Trace: [ 44.299921] [ 44.300102] dump_stack_lvl+0x91/0xf0 [ 44.300425] print_report+0xcc/0x620 [ 44.300738] ? __virt_addr_valid+0x102/0x340 [ 44.301092] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.301484] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.304880] kasan_report+0xbe/0xf0 [ 44.305212] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.305613] vma_interval_tree_remove+0xc75/0xec0 [ 44.306044] vma_prepare+0xc54/0x11a0 [ 44.306356] __split_vma+0x5af/0x950 [ 44.306662] ? __pfx___split_vma+0x10/0x10 [ 44.307004] ? find_held_lock+0x2c/0x110 [ 44.307342] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.307707] ? lock_is_held_type+0x9f/0x120 [ 44.308055] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.308443] ? mtree_range_walk+0x632/0x900 [ 44.308800] ? mas_walk+0x5c7/0x7c0 [ 44.309107] do_vmi_munmap+0x1f1/0x2b0 [ 44.309427] mmap_region+0x1f9/0x2660 [ 44.309737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.310115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.310571] ? __pfx_lock_acquire+0x10/0x10 [ 44.310915] ? __pfx_mmap_region+0x10/0x10 [ 44.311258] ? security_mmap_addr+0x7d/0xa0 [ 44.311600] ? get_unmapped_area+0x1f5/0x3f0 [ 44.311951] do_mmap+0x854/0xf00 [ 44.312233] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.312602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.312963] ksys_mmap_pgoff+0x3af/0x500 [ 44.313290] do_syscall_64+0x3f/0x90 [ 44.313600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.314058] RIP: 0033:0x7fefdfd8fd82 [ 44.314354] 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 [ 44.315689] RSP: 002b:00007ffe377eb978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.316266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefdfd8fd82 [ 44.316803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefdf1c9000 [ 44.317337] RBP: 00007fefdf1c9000 R08: 0000000000000009 R09: 0000000000001000 [ 44.317898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b446a02ec0 [ 44.318433] R13: 00007ffe377eb990 R14: 00007ffe377eb9c0 R15: 00007ffe377ebd20 [ 44.318980] [ 44.319170] [ 44.319310] Allocated by task 213: [ 44.319589] kasan_save_stack+0x22/0x50 [ 44.319916] kasan_set_track+0x25/0x30 [ 44.320233] __kasan_slab_alloc+0x59/0x70 [ 44.320569] kmem_cache_alloc+0x16b/0x370 [ 44.320902] vm_area_dup+0x20/0x160 [ 44.321195] __split_vma+0x170/0x950 [ 44.321496] split_vma+0xc6/0x110 [ 44.321786] mprotect_fixup+0x8d2/0xb30 [ 44.322113] do_mprotect_pkey+0x87e/0xd40 [ 44.322452] __x64_sys_mprotect+0x78/0xc0 [ 44.322783] do_syscall_64+0x3f/0x90 [ 44.323085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.323543] [ 44.323682] Freed by task 213: [ 44.323935] kasan_save_stack+0x22/0x50 [ 44.324259] kasan_set_track+0x25/0x30 [ 44.324578] kasan_save_free_info+0x2b/0x50 [ 44.324921] __kasan_slab_free+0x10a/0x190 [ 44.325263] kmem_cache_free+0x10d/0x4d0 [ 44.325590] rcu_core+0x8c8/0x2860 [ 44.325906] __do_softirq+0x1b7/0x7d4 [ 44.326214] [ 44.326354] Last potentially related work creation: [ 44.326728] kasan_save_stack+0x22/0x50 [ 44.327053] __kasan_record_aux_stack+0x8e/0xa0 [ 44.327419] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.327832] remove_vma+0x139/0x170 [ 44.328122] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.328479] do_vmi_munmap+0x1f1/0x2b0 [ 44.328792] __vm_munmap+0x138/0x3a0 [ 44.329092] __x64_sys_munmap+0x59/0x80 [ 44.329412] do_syscall_64+0x3f/0x90 [ 44.329716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.330145] [ 44.330284] Second to last potentially related work creation: [ 44.330716] kasan_save_stack+0x22/0x50 [ 44.331041] __kasan_record_aux_stack+0x8e/0xa0 [ 44.331412] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.331825] remove_vma+0x139/0x170 [ 44.332114] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.332470] do_vmi_munmap+0x1f1/0x2b0 [ 44.332783] mmap_region+0x1f9/0x2660 [ 44.333089] do_mmap+0x854/0xf00 [ 44.333382] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.333694] ksys_mmap_pgoff+0x3af/0x500 [ 44.334049] do_syscall_64+0x3f/0x90 [ 44.334366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.334810] [ 44.334951] The buggy address belongs to the object at ffff88800ddcb658 [ 44.334951] which belongs to the cache vm_area_struct of size 168 [ 44.335874] The buggy address is located 88 bytes inside of [ 44.335874] freed 168-byte region [ffff88800ddcb658, ffff88800ddcb700) [ 44.336762] [ 44.336904] The buggy address belongs to the physical page: [ 44.337325] page:00000000077c31fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddcb [ 44.338036] memcg:ffff88800c9bb901 [ 44.339254] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.339716] page_type: 0xffffffff() [ 44.340007] raw: 0100000000000200 ffff88800879fc80 ffffea0000381c40 dead000000000007 [ 44.340592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9bb901 [ 44.341167] page dumped because: kasan: bad access detected [ 44.341586] [ 44.341726] Memory state around the buggy address: [ 44.342130] ffff88800ddcb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.342674] ffff88800ddcb600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.343212] >ffff88800ddcb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.343758] ^ [ 44.344129] ffff88800ddcb700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 44.344673] ffff88800ddcb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 44.345211] ================================================================== [ 44.346314] Disabling lock debugging due to kernel taint [ 47.276926] BUG: Bad rss-counter state mm:00000000527f3675 type:MM_FILEPAGES val:33 [ 47.277647] BUG: Bad rss-counter state mm:00000000527f3675 type:MM_ANONPAGES val:22 [ 48.266138] BUG: Bad rss-counter state mm:00000000e6266a6f type:MM_FILEPAGES val:33 [ 48.266823] BUG: Bad rss-counter state mm:00000000e6266a6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5457' (ECDSA) to the list of known hosts. 2023/06/20 08:05:18 fuzzer started 2023/06/20 08:05:19 dialing manager at localhost:44161 2023/06/20 08:05:19 checking machine... 2023/06/20 08:05:19 checking revisions... [ 49.097901] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:05:19 testing simple program... [ 49.172257] cgroup: Unknown subsys name 'net' [ 49.235939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:05:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fd175567328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fa35021bd82 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007fa35021bd82 RSP=ffff88800fc47818 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800fc47920 R13=0000000000000000 R14=ffff88800dfad1c0 R15=0000000000000cc0 RIP=ffffffff811fc7e8 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 =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=00007fa34fd24260 CR3=000000000da16000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e3562726b62696c2f756e672d78 XMM02=00332e6f732e3562726b62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000