syzkaller login: [ 68.798380] BUG: Bad rss-counter state mm:0000000015a168ea type:MM_FILEPAGES val:33 [ 68.799825] BUG: Bad rss-counter state mm:0000000015a168ea type:MM_ANONPAGES val:22 [ 68.972761] ================================================================== [ 68.973679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.974652] Read of size 8 at addr ffff88800c682968 by task sshd/228 [ 68.975674] [ 68.975964] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.976915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.977923] Call Trace: [ 68.978247] [ 68.978540] dump_stack_lvl+0x91/0xf0 [ 68.979085] print_report+0xcc/0x620 [ 68.979599] ? __virt_addr_valid+0x102/0x340 [ 68.980169] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.980809] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.981428] kasan_report+0xbe/0xf0 [ 68.981917] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.982561] vma_interval_tree_remove+0xc75/0xec0 [ 68.983198] vma_prepare+0xc54/0x11a0 [ 68.983683] __split_vma+0x5af/0x950 [ 68.984183] ? __pfx___split_vma+0x10/0x10 [ 68.984727] ? find_held_lock+0x2c/0x110 [ 68.985260] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.985847] ? lock_is_held_type+0x9f/0x120 [ 68.986381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.987012] ? mtree_range_walk+0x632/0x900 [ 68.987586] ? mas_walk+0x5c7/0x7c0 [ 68.988082] do_vmi_munmap+0x1f1/0x2b0 [ 68.988587] mmap_region+0x1f9/0x2660 [ 68.989086] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.989611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.990335] ? __pfx_lock_acquire+0x10/0x10 [ 68.990877] ? __pfx_mmap_region+0x10/0x10 [ 68.991433] ? security_mmap_addr+0x7d/0xa0 [ 68.991988] ? get_unmapped_area+0x1f5/0x3f0 [ 68.992549] do_mmap+0x854/0xf00 [ 68.993015] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.993513] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.994083] ksys_mmap_pgoff+0x3af/0x500 [ 68.994592] do_syscall_64+0x3f/0x90 [ 68.995103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.995778] RIP: 0033:0x7f569b4b9d82 [ 68.996238] 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 [ 68.998428] RSP: 002b:00007ffc9764eef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.999524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f569b4b9d82 [ 69.000407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f569a8f3000 [ 69.001288] RBP: 00007f569a8f3000 R08: 0000000000000009 R09: 0000000000001000 [ 69.002164] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3e5da7f70 [ 69.003069] R13: 00007ffc9764ef10 R14: 00007ffc9764ef40 R15: 00007ffc9764f2a0 [ 69.003965] [ 69.004263] [ 69.004482] Allocated by task 221: [ 69.004938] kasan_save_stack+0x22/0x50 [ 69.005459] kasan_set_track+0x25/0x30 [ 69.005970] __kasan_slab_alloc+0x59/0x70 [ 69.006501] kmem_cache_alloc+0x16b/0x370 [ 69.007044] vm_area_dup+0x20/0x160 [ 69.007519] __split_vma+0x170/0x950 [ 69.008006] split_vma+0xc6/0x110 [ 69.008451] mprotect_fixup+0x8d2/0xb30 [ 69.008973] do_mprotect_pkey+0x87e/0xd40 [ 69.009502] __x64_sys_mprotect+0x78/0xc0 [ 69.010048] do_syscall_64+0x3f/0x90 [ 69.010523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.011220] [ 69.011438] Freed by task 221: [ 69.011852] kasan_save_stack+0x22/0x50 [ 69.012355] kasan_set_track+0x25/0x30 [ 69.012873] kasan_save_free_info+0x2b/0x50 [ 69.013410] __kasan_slab_free+0x10a/0x190 [ 69.013969] kmem_cache_free+0x10d/0x4d0 [ 69.014481] rcu_core+0x8c8/0x2860 [ 69.014949] __do_softirq+0x1b7/0x7d4 [ 69.015442] [ 69.015660] Last potentially related work creation: [ 69.016257] kasan_save_stack+0x22/0x50 [ 69.016787] __kasan_record_aux_stack+0x8e/0xa0 [ 69.017521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.018194] remove_vma+0x139/0x170 [ 69.018658] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.019249] do_vmi_munmap+0x1f1/0x2b0 [ 69.019755] __vm_munmap+0x138/0x3a0 [ 69.020229] __x64_sys_munmap+0x59/0x80 [ 69.020747] do_syscall_64+0x3f/0x90 [ 69.021229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.021895] [ 69.022114] The buggy address belongs to the object at ffff88800c682910 [ 69.022114] which belongs to the cache vm_area_struct of size 168 [ 69.023629] The buggy address is located 88 bytes inside of [ 69.023629] freed 168-byte region [ffff88800c682910, ffff88800c6829b8) [ 69.025059] [ 69.025278] The buggy address belongs to the physical page: [ 69.025952] page:0000000083fb2bd8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc682 [ 69.027064] memcg:ffff888018d55501 [ 69.027492] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.028150] page_type: 0xffffffff() [ 69.028601] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.029530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d55501 [ 69.030456] page dumped because: kasan: bad access detected [ 69.031159] [ 69.031379] Memory state around the buggy address: [ 69.031974] ffff88800c682800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 69.032858] ffff88800c682880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 69.033720] >ffff88800c682900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.034579] ^ [ 69.035390] ffff88800c682980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 69.036266] ffff88800c682a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.037149] ================================================================== [ 69.038125] Disabling lock debugging due to kernel taint [ 71.088140] BUG: Bad rss-counter state mm:00000000cd49c9ad type:MM_FILEPAGES val:33 [ 71.088986] BUG: Bad rss-counter state mm:00000000cd49c9ad type:MM_ANONPAGES val:22 [ 71.514825] BUG: Bad rss-counter state mm:00000000750a5e7b type:MM_FILEPAGES val:33 [ 71.516071] BUG: Bad rss-counter state mm:00000000750a5e7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54429' (ECDSA) to the list of known hosts. 2023/06/20 17:52:49 fuzzer started 2023/06/20 17:52:49 dialing manager at localhost:36067 2023/06/20 17:52:49 checking machine... 2023/06/20 17:52:49 checking revisions... [ 72.210395] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:52:49 testing simple program... [ 72.265220] cgroup: Unknown subsys name 'net' [ 72.303403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880169777d0 RCX=ffffffff860d8201 RDX=1ffff11002d2ef08 RSI=ffffffff8180c6a2 RDI=ffff8880169777dc RBP=ffff888016977840 RSP=ffff8880169776e8 R8 =ffffffff860d825a R9 =ffff888016977748 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880169777d0 R13=0000000000000000 R14=ffff88800ca98000 R15=0000000000082cc0 RIP=ffffffff813ad547 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 00007fd31e911900 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=00007ffd4de74000 CR3=000000001a9d8000 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=6720646572637465733a4d41503d706f 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f8e6f3a1a40 CR3=000000000c902000 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=4924825aa63f60a0b04f242a7ee0cffe XMM02=2c67c8bc2e329bc3000000000011b6b0 XMM03=fb795ef6d65770560000000000123480 XMM04=4bf842cc756a7cbe00000000000ae988 XMM05=07c8bb74b6c04a4400000000001336e8 XMM06=c0f0f30693d23ac30000000000132308 XMM07=e042d86d42eb936e0000000000123700 XMM08=b73a2c77fa7b02a3000000000011b710 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000