syzkaller login: [ 38.696210] BUG: Bad rss-counter state mm:000000009aee0c12 type:MM_FILEPAGES val:33 [ 38.697809] BUG: Bad rss-counter state mm:000000009aee0c12 type:MM_ANONPAGES val:22 [ 38.870916] ================================================================== [ 38.871993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.873107] Read of size 8 at addr ffff88800c994798 by task sshd/220 [ 38.874066] [ 38.874274] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.875078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.876002] Call Trace: [ 38.876303] [ 38.876568] dump_stack_lvl+0x91/0xf0 [ 38.877031] print_report+0xcc/0x620 [ 38.877506] ? __virt_addr_valid+0x102/0x340 [ 38.878028] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878607] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879182] kasan_report+0xbe/0xf0 [ 38.879629] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880212] vma_interval_tree_remove+0xc75/0xec0 [ 38.880777] vma_prepare+0xc54/0x11a0 [ 38.881224] __split_vma+0x5af/0x950 [ 38.881687] ? __pfx___split_vma+0x10/0x10 [ 38.882210] ? find_held_lock+0x2c/0x110 [ 38.882726] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.883281] ? lock_is_held_type+0x9f/0x120 [ 38.883833] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.884450] ? mtree_range_walk+0x632/0x900 [ 38.885020] ? mas_walk+0x5c7/0x7c0 [ 38.885532] do_vmi_munmap+0x1f1/0x2b0 [ 38.886032] mmap_region+0x1f9/0x2660 [ 38.886521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.887038] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.887763] ? __pfx_lock_acquire+0x10/0x10 [ 38.888297] ? __pfx_mmap_region+0x10/0x10 [ 38.888835] ? security_mmap_addr+0x7d/0xa0 [ 38.889388] ? get_unmapped_area+0x1f5/0x3f0 [ 38.889947] do_mmap+0x854/0xf00 [ 38.890387] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.890883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.891449] ksys_mmap_pgoff+0x3af/0x500 [ 38.891966] do_syscall_64+0x3f/0x90 [ 38.892456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893116] RIP: 0033:0x7f0b12e7bd82 [ 38.893602] 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 [ 38.895790] RSP: 002b:00007ffcd10aa8a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.896700] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b12e7bd82 [ 38.897560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b122b5000 [ 38.898414] RBP: 00007f0b122b5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.899276] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9fa61f980 [ 38.900147] R13: 00007ffcd10aa8c0 R14: 00007ffcd10aa8f0 R15: 00007ffcd10aac50 [ 38.901009] [ 38.901337] [ 38.901565] Allocated by task 213: [ 38.901997] kasan_save_stack+0x22/0x50 [ 38.902509] kasan_set_track+0x25/0x30 [ 38.903000] __kasan_slab_alloc+0x59/0x70 [ 38.903526] kmem_cache_alloc+0x16b/0x370 [ 38.904053] vm_area_dup+0x20/0x160 [ 38.904514] __split_vma+0x170/0x950 [ 38.904982] split_vma+0xc6/0x110 [ 38.905438] mprotect_fixup+0x8d2/0xb30 [ 38.905944] do_mprotect_pkey+0x87e/0xd40 [ 38.906462] __x64_sys_mprotect+0x78/0xc0 [ 38.906988] do_syscall_64+0x3f/0x90 [ 38.907465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908113] [ 38.908331] Freed by task 213: [ 38.908726] kasan_save_stack+0x22/0x50 [ 38.909236] kasan_set_track+0x25/0x30 [ 38.909743] kasan_save_free_info+0x2b/0x50 [ 38.910277] __kasan_slab_free+0x10a/0x190 [ 38.910815] kmem_cache_free+0x10d/0x4d0 [ 38.911320] rcu_core+0x8c8/0x2860 [ 38.911765] __do_softirq+0x1b7/0x7d4 [ 38.912240] [ 38.912455] Last potentially related work creation: [ 38.913051] kasan_save_stack+0x22/0x50 [ 38.913586] __kasan_record_aux_stack+0x8e/0xa0 [ 38.914167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.914895] remove_vma+0x139/0x170 [ 38.915349] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.915909] do_vmi_munmap+0x1f1/0x2b0 [ 38.916402] __vm_munmap+0x138/0x3a0 [ 38.916876] __x64_sys_munmap+0x59/0x80 [ 38.917389] do_syscall_64+0x3f/0x90 [ 38.917868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918527] [ 38.918742] Second to last potentially related work creation: [ 38.919440] kasan_save_stack+0x22/0x50 [ 38.919942] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920513] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921156] remove_vma+0x139/0x170 [ 38.921635] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922194] do_vmi_munmap+0x1f1/0x2b0 [ 38.922678] mmap_region+0x1f9/0x2660 [ 38.923158] do_mmap+0x854/0xf00 [ 38.923593] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924091] ksys_mmap_pgoff+0x3af/0x500 [ 38.924602] do_syscall_64+0x3f/0x90 [ 38.925086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925742] [ 38.925960] The buggy address belongs to the object at ffff88800c994740 [ 38.925960] which belongs to the cache vm_area_struct of size 168 [ 38.927463] The buggy address is located 88 bytes inside of [ 38.927463] freed 168-byte region [ffff88800c994740, ffff88800c9947e8) [ 38.928884] [ 38.929102] The buggy address belongs to the physical page: [ 38.929794] page:00000000fac6c270 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc994 [ 38.930890] memcg:ffff88800ca06101 [ 38.931317] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.932022] page_type: 0xffffffff() [ 38.932483] raw: 0100000000000200 ffff8880087a0c80 ffffea0000327440 dead000000000007 [ 38.933430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca06101 [ 38.934349] page dumped because: kasan: bad access detected [ 38.935027] [ 38.935243] Memory state around the buggy address: [ 38.935827] ffff88800c994680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.936692] ffff88800c994700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.937569] >ffff88800c994780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.938430] ^ [ 38.938926] ffff88800c994800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.939787] ffff88800c994880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.940647] ================================================================== [ 38.941652] Disabling lock debugging due to kernel taint [ 40.834822] BUG: Bad rss-counter state mm:000000006460aa4d type:MM_FILEPAGES val:33 [ 40.835805] BUG: Bad rss-counter state mm:000000006460aa4d type:MM_ANONPAGES val:22 [ 41.379288] BUG: Bad rss-counter state mm:00000000eff388d3 type:MM_FILEPAGES val:33 [ 41.380549] BUG: Bad rss-counter state mm:00000000eff388d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3565' (ECDSA) to the list of known hosts. 2023/06/21 06:03:18 fuzzer started 2023/06/21 06:03:18 dialing manager at localhost:36067 2023/06/21 06:03:18 checking machine... 2023/06/21 06:03:18 checking revisions... [ 42.005429] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:03:19 testing simple program... [ 42.057773] cgroup: Unknown subsys name 'net' [ 42.101615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:18 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=00007ff798d2c030 CR3=000000000d746000 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=f25a912eb58f76baf14d1b5378a288e1 XMM02=000000000011be28eff9b2d0a8fce9cb XMM03=000000000011bef82c67c8bc2e329bc3 XMM04=417f0c9b3588d76500000000000ae988 XMM05=19e9129bd510f2350000000000132ff8 XMM06=4fda316b135da52b0000000000132e80 XMM07=e042d86d42eb936e0000000000122378 XMM08=17a08c8c0d5896db000000000011bef8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000000000e5 RCX=1ffff1100136e608 RDX=1ffff11002bad774 RSI=0000000000000004 RDI=ffff888009b730d8 RBP=0000000000000020 RSP=ffff88800f4d7bc8 R8 =0000000000000001 R9 =ffff888009b730dc R10=ffff888009b73093 R11=00000000000b6a61 R12=ffff88800f6df5c0 R13=0000000000000000 R14=ffff888009b73048 R15=ffff888009b73000 RIP=ffffffff818479ba RFL=00000246 [---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 00007fa540fda900 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=00007fa5415920b0 CR3=000000001ca10000 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=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