syzkaller login: [ 38.721925] BUG: Bad rss-counter state mm:00000000aba0aecf type:MM_FILEPAGES val:33 [ 38.722935] BUG: Bad rss-counter state mm:00000000aba0aecf type:MM_ANONPAGES val:22 [ 38.833590] ================================================================== [ 38.834356] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.835086] Read of size 8 at addr ffff88800deb03f8 by task sshd/218 [ 38.835682] [ 38.835856] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.836695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.837462] Call Trace: [ 38.837713] [ 38.837934] dump_stack_lvl+0x91/0xf0 [ 38.838313] print_report+0xcc/0x620 [ 38.838708] ? __virt_addr_valid+0x102/0x340 [ 38.839140] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.839620] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840101] kasan_report+0xbe/0xf0 [ 38.840471] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840949] vma_interval_tree_remove+0xc75/0xec0 [ 38.841427] vma_prepare+0xc54/0x11a0 [ 38.841800] __split_vma+0x5af/0x950 [ 38.842164] ? __pfx___split_vma+0x10/0x10 [ 38.842571] ? find_held_lock+0x2c/0x110 [ 38.842977] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.843423] ? lock_is_held_type+0x9f/0x120 [ 38.843847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.844316] ? mtree_range_walk+0x632/0x900 [ 38.844748] ? mas_walk+0x5c7/0x7c0 [ 38.845116] do_vmi_munmap+0x1f1/0x2b0 [ 38.845516] mmap_region+0x1f9/0x2660 [ 38.845879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.846214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.846680] ? __pfx_lock_acquire+0x10/0x10 [ 38.847024] ? __pfx_mmap_region+0x10/0x10 [ 38.847365] ? security_mmap_addr+0x7d/0xa0 [ 38.847710] ? get_unmapped_area+0x1f5/0x3f0 [ 38.848063] do_mmap+0x854/0xf00 [ 38.848345] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.848670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.849033] ksys_mmap_pgoff+0x3af/0x500 [ 38.849363] do_syscall_64+0x3f/0x90 [ 38.849679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.850092] RIP: 0033:0x7f61f72c4d82 [ 38.850386] 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 [ 38.851769] RSP: 002b:00007ffcddd0aab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.852355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61f72c4d82 [ 38.852902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61f66fe000 [ 38.853462] RBP: 00007f61f66fe000 R08: 0000000000000009 R09: 0000000000001000 [ 38.854012] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbc67fef70 [ 38.854587] R13: 00007ffcddd0aad0 R14: 00007ffcddd0ab00 R15: 00007ffcddd0ae60 [ 38.855145] [ 38.855333] [ 38.855469] Allocated by task 211: [ 38.855749] kasan_save_stack+0x22/0x50 [ 38.856076] kasan_set_track+0x25/0x30 [ 38.856392] __kasan_slab_alloc+0x59/0x70 [ 38.856730] kmem_cache_alloc+0x16b/0x370 [ 38.857063] vm_area_dup+0x20/0x160 [ 38.857371] __split_vma+0x170/0x950 [ 38.857666] split_vma+0xc6/0x110 [ 38.857949] mprotect_fixup+0x8d2/0xb30 [ 38.858271] do_mprotect_pkey+0x87e/0xd40 [ 38.858610] __x64_sys_mprotect+0x78/0xc0 [ 38.858951] do_syscall_64+0x3f/0x90 [ 38.859260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859676] [ 38.859812] Freed by task 202: [ 38.860063] kasan_save_stack+0x22/0x50 [ 38.860386] kasan_set_track+0x25/0x30 [ 38.860700] kasan_save_free_info+0x2b/0x50 [ 38.861026] __kasan_slab_free+0x10a/0x190 [ 38.861368] kmem_cache_free+0x10d/0x4d0 [ 38.861677] rcu_core+0x8c8/0x2860 [ 38.861949] __do_softirq+0x1b7/0x7d4 [ 38.862240] [ 38.862371] Last potentially related work creation: [ 38.862729] kasan_save_stack+0x22/0x50 [ 38.863036] __kasan_record_aux_stack+0x8e/0xa0 [ 38.863388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.863783] remove_vma+0x139/0x170 [ 38.864057] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.864400] do_vmi_munmap+0x1f1/0x2b0 [ 38.864695] __vm_munmap+0x138/0x3a0 [ 38.864981] __x64_sys_munmap+0x59/0x80 [ 38.865287] do_syscall_64+0x3f/0x90 [ 38.865581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865977] [ 38.866110] Second to last potentially related work creation: [ 38.866526] kasan_save_stack+0x22/0x50 [ 38.866833] __kasan_record_aux_stack+0x8e/0xa0 [ 38.867182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.867573] remove_vma+0x139/0x170 [ 38.867853] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.868197] do_vmi_munmap+0x1f1/0x2b0 [ 38.868495] mmap_region+0x1f9/0x2660 [ 38.868787] do_mmap+0x854/0xf00 [ 38.869055] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869371] ksys_mmap_pgoff+0x3af/0x500 [ 38.869695] do_syscall_64+0x3f/0x90 [ 38.870000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.870420] [ 38.870555] The buggy address belongs to the object at ffff88800deb03a0 [ 38.870555] which belongs to the cache vm_area_struct of size 168 [ 38.871503] The buggy address is located 88 bytes inside of [ 38.871503] freed 168-byte region [ffff88800deb03a0, ffff88800deb0448) [ 38.872412] [ 38.872550] The buggy address belongs to the physical page: [ 38.872979] page:00000000e2333002 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeb0 [ 38.873689] memcg:ffff88800d77b701 [ 38.873964] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.874383] page_type: 0xffffffff() [ 38.874674] raw: 0100000000000200 ffff8880087a0c80 ffffea000036f880 dead000000000006 [ 38.875268] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d77b701 [ 38.875850] page dumped because: kasan: bad access detected [ 38.876279] [ 38.876416] Memory state around the buggy address: [ 38.876788] ffff88800deb0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.877351] ffff88800deb0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.877969] >ffff88800deb0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.878519] ^ [ 38.879061] ffff88800deb0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.879610] ffff88800deb0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.880158] ================================================================== [ 38.880732] Disabling lock debugging due to kernel taint [ 41.126067] BUG: Bad rss-counter state mm:00000000ee160255 type:MM_FILEPAGES val:33 [ 41.127326] BUG: Bad rss-counter state mm:00000000ee160255 type:MM_ANONPAGES val:22 [ 41.624079] BUG: Bad rss-counter state mm:0000000077416f9c type:MM_FILEPAGES val:33 [ 41.625073] BUG: Bad rss-counter state mm:0000000077416f9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59669' (ECDSA) to the list of known hosts. 2023/06/20 17:20:57 fuzzer started 2023/06/20 17:20:57 dialing manager at localhost:36067 2023/06/20 17:20:57 checking machine... 2023/06/20 17:20:57 checking revisions... [ 42.348685] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:20:57 testing simple program... [ 42.396852] cgroup: Unknown subsys name 'net' [ 42.447431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=ffffffff8226f5cd RDX=ffff8880147b8000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000fd0 RSP=ffff8880147b7d20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000055bb31987e00 R13=ffff888018f6e620 R14=356531383665372f R15=ffff888018f6e630 RIP=ffffffff8226f5d1 RFL=00040293 [--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 00007f20e79dd900 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=00005636f62ec748 CR3=000000000cb1e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e498faa874b95d4600000000000ae988 XMM05=c66638d4aa2f5fb70000000000133240 XMM06=751b9502027dc0b90000000000132018 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=000055a3af18dc78 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f3ac5789c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000