syzkaller login: [ 31.469981] BUG: Bad rss-counter state mm:00000000cd88b91a type:MM_FILEPAGES val:33 [ 31.471054] BUG: Bad rss-counter state mm:00000000cd88b91a type:MM_ANONPAGES val:22 [ 31.637231] ================================================================== [ 31.638270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.639328] Read of size 8 at addr ffff888009466ed8 by task sshd/220 [ 31.640393] [ 31.640637] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.641599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.642788] Call Trace: [ 31.643193] <TASK> [ 31.643564] dump_stack_lvl+0x91/0xf0 [ 31.644190] print_report+0xcc/0x620 [ 31.644807] ? __virt_addr_valid+0x102/0x340 [ 31.645521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.646264] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.647002] kasan_report+0xbe/0xf0 [ 31.647589] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.648336] vma_interval_tree_remove+0xc75/0xec0 [ 31.649063] vma_prepare+0xc54/0x11a0 [ 31.649637] __split_vma+0x5af/0x950 [ 31.650205] ? __pfx___split_vma+0x10/0x10 [ 31.650841] ? find_held_lock+0x2c/0x110 [ 31.651488] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.652129] ? lock_is_held_type+0x9f/0x120 [ 31.652730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.653381] ? mtree_range_walk+0x632/0x900 [ 31.653978] ? mas_walk+0x5c7/0x7c0 [ 31.654490] do_vmi_munmap+0x1f1/0x2b0 [ 31.655017] mmap_region+0x1f9/0x2660 [ 31.655553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.656107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.656870] ? __pfx_lock_acquire+0x10/0x10 [ 31.657442] ? __pfx_mmap_region+0x10/0x10 [ 31.658010] ? security_mmap_addr+0x7d/0xa0 [ 31.658574] ? get_unmapped_area+0x1f5/0x3f0 [ 31.659155] do_mmap+0x854/0xf00 [ 31.659635] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.660169] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.660777] ksys_mmap_pgoff+0x3af/0x500 [ 31.661328] do_syscall_64+0x3f/0x90 [ 31.661844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.662534] RIP: 0033:0x7f1c974fbd82 [ 31.663021] 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 [ 31.665318] RSP: 002b:00007fff45420208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.666275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c974fbd82 [ 31.667174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c96935000 [ 31.668098] RBP: 00007f1c96935000 R08: 0000000000000009 R09: 0000000000001000 [ 31.669006] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb5dc9dec0 [ 31.669923] R13: 00007fff45420220 R14: 00007fff45420250 R15: 00007fff454205b0 [ 31.670851] </TASK> [ 31.671170] [ 31.671422] Allocated by task 213: [ 31.671883] kasan_save_stack+0x22/0x50 [ 31.672426] kasan_set_track+0x25/0x30 [ 31.672956] __kasan_slab_alloc+0x59/0x70 [ 31.673526] kmem_cache_alloc+0x16b/0x370 [ 31.674088] vm_area_dup+0x20/0x160 [ 31.674585] __split_vma+0x170/0x950 [ 31.675093] split_vma+0xc6/0x110 [ 31.675575] mprotect_fixup+0x8d2/0xb30 [ 31.676115] do_mprotect_pkey+0x87e/0xd40 [ 31.676676] __x64_sys_mprotect+0x78/0xc0 [ 31.677240] do_syscall_64+0x3f/0x90 [ 31.677745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.678437] [ 31.678669] Freed by task 210: [ 31.679089] kasan_save_stack+0x22/0x50 [ 31.679639] kasan_set_track+0x25/0x30 [ 31.680180] kasan_save_free_info+0x2b/0x50 [ 31.680757] __kasan_slab_free+0x10a/0x190 [ 31.681403] kmem_cache_free+0x10d/0x4d0 [ 31.681962] rcu_core+0x8c8/0x2860 [ 31.682448] __do_softirq+0x1b7/0x7d4 [ 31.682977] [ 31.683219] Last potentially related work creation: [ 31.683858] kasan_save_stack+0x22/0x50 [ 31.684405] __kasan_record_aux_stack+0x8e/0xa0 [ 31.685024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.685727] remove_vma+0x139/0x170 [ 31.686224] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.686829] do_vmi_munmap+0x1f1/0x2b0 [ 31.687359] __vm_munmap+0x138/0x3a0 [ 31.687873] __x64_sys_munmap+0x59/0x80 [ 31.688412] do_syscall_64+0x3f/0x90 [ 31.688925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.689620] [ 31.689851] The buggy address belongs to the object at ffff888009466e80 [ 31.689851] which belongs to the cache vm_area_struct of size 168 [ 31.691471] The buggy address is located 88 bytes inside of [ 31.691471] freed 168-byte region [ffff888009466e80, ffff888009466f28) [ 31.692988] [ 31.693223] The buggy address belongs to the physical page: [ 31.693934] page:0000000027310d7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9466 [ 31.695105] memcg:ffff88800d51c901 [ 31.695565] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.696268] page_type: 0xffffffff() [ 31.696764] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.697788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d51c901 [ 31.698809] page dumped because: kasan: bad access detected [ 31.699568] [ 31.699804] Memory state around the buggy address: [ 31.700460] ffff888009466d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.701419] ffff888009466e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.702378] >ffff888009466e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.703342] ^ [ 31.704154] ffff888009466f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.705104] ffff888009466f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.706050] ================================================================== [ 31.707161] Disabling lock debugging due to kernel taint [ 33.942701] BUG: Bad rss-counter state mm:00000000e2f44b55 type:MM_FILEPAGES val:33 [ 33.944050] BUG: Bad rss-counter state mm:00000000e2f44b55 type:MM_ANONPAGES val:22 [ 34.402999] BUG: Bad rss-counter state mm:000000006cf19535 type:MM_FILEPAGES val:33 [ 34.404245] BUG: Bad rss-counter state mm:000000006cf19535 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31489' (ECDSA) to the list of known hosts. 2023/06/20 14:26:54 fuzzer started 2023/06/20 14:26:54 dialing manager at localhost:36067 2023/06/20 14:26:54 checking machine... 2023/06/20 14:26:54 checking revisions... [ 35.195160] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:26:54 testing simple program... [ 35.245029] cgroup: Unknown subsys name 'net' [ 35.284003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:54 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888017f97928 RDX=1ffff11002ff2f1c RSI=ffffffff813ad720 RDI=ffff888017f97950 RBP=ffff888017f97920 RSP=ffff888017f97880 R8 =0000000000000001 R9 =ffff888017f978c8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888017f97950 R13=0000000000000000 R14=ffff88800f110000 R15=0000000000092cc0 RIP=ffffffff84538440 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 00007f5f645be900 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=00007f5f64b75618 CR3=000000000c6aa000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007faa003552a0 CR3=0000000013abe000 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=c6faf07af36f3baac341f59d1121394b XMM02=ec2efd57dc4c00df000000000011d868 XMM03=a36be8fa3d37c41c000000000011d938 XMM04=0f5b38100987a96100000000000ae988 XMM05=19e9129bd510f2350000000000131e38 XMM06=fcc61cdd8b5eefc20000000000130ca0 XMM07=e042d86d42eb936e0000000000122240 XMM08=a36be8fa3d37c41c000000000011d938 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000