syzkaller login: [ 31.457898] BUG: Bad rss-counter state mm:0000000014246c0b type:MM_FILEPAGES val:33 [ 31.459570] BUG: Bad rss-counter state mm:0000000014246c0b type:MM_ANONPAGES val:22 [ 31.563940] ================================================================== [ 31.565018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.566138] Read of size 8 at addr ffff88800fecac20 by task sshd/220 [ 31.566903] [ 31.567073] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.567737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.568480] Call Trace: [ 31.568736] [ 31.568953] dump_stack_lvl+0x91/0xf0 [ 31.569346] print_report+0xcc/0x620 [ 31.569723] ? __virt_addr_valid+0x102/0x340 [ 31.570146] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.570620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.571090] kasan_report+0xbe/0xf0 [ 31.571465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.571943] vma_interval_tree_remove+0xc75/0xec0 [ 31.572410] vma_prepare+0xc54/0x11a0 [ 31.572780] __split_vma+0x5af/0x950 [ 31.573143] ? __pfx___split_vma+0x10/0x10 [ 31.573566] ? find_held_lock+0x2c/0x110 [ 31.573967] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.574399] ? lock_is_held_type+0x9f/0x120 [ 31.574814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.575281] ? mtree_range_walk+0x632/0x900 [ 31.575704] ? mas_walk+0x5c7/0x7c0 [ 31.576073] do_vmi_munmap+0x1f1/0x2b0 [ 31.576455] mmap_region+0x1f9/0x2660 [ 31.576828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.577223] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.577797] ? __pfx_lock_acquire+0x10/0x10 [ 31.578193] ? __pfx_mmap_region+0x10/0x10 [ 31.578499] ? security_mmap_addr+0x7d/0xa0 [ 31.578810] ? get_unmapped_area+0x1f5/0x3f0 [ 31.579125] do_mmap+0x854/0xf00 [ 31.579376] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.579665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.579992] ksys_mmap_pgoff+0x3af/0x500 [ 31.580284] do_syscall_64+0x3f/0x90 [ 31.580563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.580936] RIP: 0033:0x7f85f9cd4d82 [ 31.581203] 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 [ 31.582454] RSP: 002b:00007ffe6d474a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.582982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85f9cd4d82 [ 31.583473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85f910e000 [ 31.583965] RBP: 00007f85f910e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.584462] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a37bb8ec0 [ 31.584962] R13: 00007ffe6d474a60 R14: 00007ffe6d474a90 R15: 00007ffe6d474df0 [ 31.585471] [ 31.585638] [ 31.585762] Allocated by task 213: [ 31.586009] kasan_save_stack+0x22/0x50 [ 31.586298] kasan_set_track+0x25/0x30 [ 31.586585] __kasan_slab_alloc+0x59/0x70 [ 31.586889] kmem_cache_alloc+0x16b/0x370 [ 31.587187] vm_area_dup+0x20/0x160 [ 31.587450] __split_vma+0x170/0x950 [ 31.587723] split_vma+0xc6/0x110 [ 31.587971] mprotect_fixup+0x8d2/0xb30 [ 31.588262] do_mprotect_pkey+0x87e/0xd40 [ 31.588565] __x64_sys_mprotect+0x78/0xc0 [ 31.588865] do_syscall_64+0x3f/0x90 [ 31.589136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589513] [ 31.589635] Freed by task 213: [ 31.589863] kasan_save_stack+0x22/0x50 [ 31.590161] kasan_set_track+0x25/0x30 [ 31.590449] kasan_save_free_info+0x2b/0x50 [ 31.590759] __kasan_slab_free+0x10a/0x190 [ 31.591069] kmem_cache_free+0x10d/0x4d0 [ 31.591365] rcu_core+0x8c8/0x2860 [ 31.591623] __do_softirq+0x1b7/0x7d4 [ 31.591906] [ 31.592030] Last potentially related work creation: [ 31.592368] kasan_save_stack+0x22/0x50 [ 31.592660] __kasan_record_aux_stack+0x8e/0xa0 [ 31.592996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.593371] remove_vma+0x139/0x170 [ 31.593630] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.593953] do_vmi_munmap+0x1f1/0x2b0 [ 31.594243] __vm_munmap+0x138/0x3a0 [ 31.594512] __x64_sys_munmap+0x59/0x80 [ 31.594801] do_syscall_64+0x3f/0x90 [ 31.595077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.595450] [ 31.595575] The buggy address belongs to the object at ffff88800fecabc8 [ 31.595575] which belongs to the cache vm_area_struct of size 168 [ 31.596421] The buggy address is located 88 bytes inside of [ 31.596421] freed 168-byte region [ffff88800fecabc8, ffff88800fecac70) [ 31.597237] [ 31.597363] The buggy address belongs to the physical page: [ 31.597728] page:00000000d80e095f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeca [ 31.598321] memcg:ffff88800daf4601 [ 31.598553] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.598904] page_type: 0xffffffff() [ 31.599148] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.599650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daf4601 [ 31.600141] page dumped because: kasan: bad access detected [ 31.600506] [ 31.600624] Memory state around the buggy address: [ 31.600942] ffff88800fecab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.601416] ffff88800fecab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.601891] >ffff88800fecac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.602374] ^ [ 31.602690] ffff88800fecac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.603206] ffff88800fecad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.603707] ================================================================== [ 31.604258] Disabling lock debugging due to kernel taint [ 33.609542] BUG: Bad rss-counter state mm:000000004360aa4c type:MM_FILEPAGES val:33 [ 33.611101] BUG: Bad rss-counter state mm:000000004360aa4c type:MM_ANONPAGES val:22 [ 34.067221] BUG: Bad rss-counter state mm:00000000171f3b40 type:MM_FILEPAGES val:33 [ 34.068210] BUG: Bad rss-counter state mm:00000000171f3b40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47540' (ECDSA) to the list of known hosts. 2023/06/20 12:09:41 fuzzer started 2023/06/20 12:09:41 dialing manager at localhost:36067 2023/06/20 12:09:41 checking machine... 2023/06/20 12:09:41 checking revisions... [ 34.825015] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:09:41 testing simple program... [ 34.875780] cgroup: Unknown subsys name 'net' [ 34.916438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:09:41 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=00007fbf25b41670 CR3=000000000cc56000 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=269ed744676c3da4cc4ade7f4cbf1783 XMM02=000000000011abb8eff9b2d0a8fce9cb XMM03=000000000011ac882c67c8bc2e329bc3 XMM04=fe5a5c210731ae7900000000000ae988 XMM05=7bc47a55dd0703510000000000132d30 XMM06=4fda316b135da52b0000000000131dd0 XMM07=e042d86d42eb936e00000000001223a0 XMM08=0999eedb4fafd6f7000000000011ac88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc06 RBX=ffffffff85dfe034 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88800fea7490 R8 =ffffffff86138eb0 R9 =ffff88800fea7588 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe038 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f15ca349900 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=00007ffe0a411000 CR3=000000000d93c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000