syzkaller login: [ 30.168817] BUG: Bad rss-counter state mm:000000003d0cd654 type:MM_FILEPAGES val:33 [ 30.169833] BUG: Bad rss-counter state mm:000000003d0cd654 type:MM_ANONPAGES val:22 [ 30.333015] ================================================================== [ 30.334078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.335328] Read of size 8 at addr ffff88800e88aed8 by task sshd/218 [ 30.336241] [ 30.336503] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.337571] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.338558] Call Trace: [ 30.338890] [ 30.339173] dump_stack_lvl+0x91/0xf0 [ 30.339665] print_report+0xcc/0x620 [ 30.340149] ? __virt_addr_valid+0x102/0x340 [ 30.340705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.341332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.341947] kasan_report+0xbe/0xf0 [ 30.342438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.343077] vma_interval_tree_remove+0xc75/0xec0 [ 30.343680] vma_prepare+0xc54/0x11a0 [ 30.344153] __split_vma+0x5af/0x950 [ 30.344623] ? __pfx___split_vma+0x10/0x10 [ 30.345151] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 30.345783] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.346430] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.347004] ? lock_is_held_type+0x9f/0x120 [ 30.347536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.348136] ? mtree_range_walk+0x632/0x900 [ 30.348678] ? mas_walk+0x5c7/0x7c0 [ 30.349150] do_vmi_munmap+0x1f1/0x2b0 [ 30.349633] mmap_region+0x1f9/0x2660 [ 30.350110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.350620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.351335] ? __pfx_lock_acquire+0x10/0x10 [ 30.351856] ? __pfx_mmap_region+0x10/0x10 [ 30.352378] ? security_mmap_addr+0x7d/0xa0 [ 30.352904] ? get_unmapped_area+0x1f5/0x3f0 [ 30.353448] do_mmap+0x854/0xf00 [ 30.353882] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.354375] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.354954] ksys_mmap_pgoff+0x3af/0x500 [ 30.355450] do_syscall_64+0x3f/0x90 [ 30.355932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.356566] RIP: 0033:0x7fd476ddbd82 [ 30.357018] 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 [ 30.359147] RSP: 002b:00007fff1aa877c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.360049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd476ddbd82 [ 30.360888] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd476215000 [ 30.361722] RBP: 00007fd476215000 R08: 0000000000000009 R09: 0000000000001000 [ 30.362567] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d4ff19f70 [ 30.363429] R13: 00007fff1aa877e0 R14: 00007fff1aa87810 R15: 00007fff1aa87b70 [ 30.364286] [ 30.364574] [ 30.364788] Allocated by task 211: [ 30.365213] kasan_save_stack+0x22/0x50 [ 30.365713] kasan_set_track+0x25/0x30 [ 30.366205] __kasan_slab_alloc+0x59/0x70 [ 30.366724] kmem_cache_alloc+0x16b/0x370 [ 30.367234] vm_area_dup+0x20/0x160 [ 30.367683] __split_vma+0x170/0x950 [ 30.368146] split_vma+0xc6/0x110 [ 30.368581] mprotect_fixup+0x8d2/0xb30 [ 30.369076] do_mprotect_pkey+0x87e/0xd40 [ 30.369587] __x64_sys_mprotect+0x78/0xc0 [ 30.370100] do_syscall_64+0x3f/0x90 [ 30.370572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.371209] [ 30.371416] Freed by task 211: [ 30.371801] kasan_save_stack+0x22/0x50 [ 30.372307] kasan_set_track+0x25/0x30 [ 30.372804] kasan_save_free_info+0x2b/0x50 [ 30.373345] __kasan_slab_free+0x10a/0x190 [ 30.373886] kmem_cache_free+0x10d/0x4d0 [ 30.374397] rcu_core+0x8c8/0x2860 [ 30.374864] __do_softirq+0x1b7/0x7d4 [ 30.375336] [ 30.375549] Last potentially related work creation: [ 30.376136] kasan_save_stack+0x22/0x50 [ 30.376729] __kasan_record_aux_stack+0x8e/0xa0 [ 30.377295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.377940] remove_vma+0x139/0x170 [ 30.378394] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.378965] do_vmi_munmap+0x1f1/0x2b0 [ 30.379440] __vm_munmap+0x138/0x3a0 [ 30.379906] __x64_sys_munmap+0x59/0x80 [ 30.380399] do_syscall_64+0x3f/0x90 [ 30.380872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.381503] [ 30.381712] The buggy address belongs to the object at ffff88800e88ae80 [ 30.381712] which belongs to the cache vm_area_struct of size 168 [ 30.383187] The buggy address is located 88 bytes inside of [ 30.383187] freed 168-byte region [ffff88800e88ae80, ffff88800e88af28) [ 30.384586] [ 30.384802] The buggy address belongs to the physical page: [ 30.385460] page:000000004e1c44d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe88a [ 30.386537] memcg:ffff88800edb1f01 [ 30.386973] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.387617] page_type: 0xffffffff() [ 30.388075] raw: 0100000000000200 ffff8880087a0c80 ffffea0000378b00 dead000000000004 [ 30.388987] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edb1f01 [ 30.389880] page dumped because: kasan: bad access detected [ 30.390533] [ 30.390768] Memory state around the buggy address: [ 30.391340] ffff88800e88ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.392190] ffff88800e88ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.393036] >ffff88800e88ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.393881] ^ [ 30.394605] ffff88800e88af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.395469] ffff88800e88af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.396314] ================================================================== [ 30.397293] Disabling lock debugging due to kernel taint [ 32.625053] BUG: Bad rss-counter state mm:000000004d350083 type:MM_FILEPAGES val:33 [ 32.626274] BUG: Bad rss-counter state mm:000000004d350083 type:MM_ANONPAGES val:22 [ 33.052925] BUG: Bad rss-counter state mm:00000000c7ecc2a4 type:MM_FILEPAGES val:33 [ 33.054027] BUG: Bad rss-counter state mm:00000000c7ecc2a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20125' (ECDSA) to the list of known hosts. 2023/06/20 21:25:11 fuzzer started 2023/06/20 21:25:11 dialing manager at localhost:36067 2023/06/20 21:25:11 checking machine... 2023/06/20 21:25:11 checking revisions... [ 33.698824] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:25:11 testing simple program... [ 33.738745] cgroup: Unknown subsys name 'net' [ 33.781020] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:25:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=1ffff1100d9c5848 RSI=ffffffff813fe14d RDI=ffffffff85d3d350 RBP=0000000000000011 RSP=ffff88806ce09fb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806ce09ff8 R12=00000007a6c9baed R13=0000000000000004 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000046 [---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 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=00007f8c6845f100 CR3=000000000f696000 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=041cca7d72e8709ac84cce163fcad4e8 XMM02=2c67c8bc2e329bc3000000000011b6d0 XMM03=fb795ef6d657705600000000001219b8 XMM04=6cb8bce3ff4d24a400000000000ae988 XMM05=751b9502027dc0b900000000001319f8 XMM06=cd161de95d691cc80000000000130bd0 XMM07=e042d86d42eb936e0000000000121c90 XMM08=70d9ce802b95bae3000000000011b730 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0abfc RBX=ffffffff86055fe0 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffffffff86055fe0 RSP=ffff88806cf099b8 R8 =ffffffff864bcdf6 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffffffff86055fe0 R13=ffffffff86055fb8 R14=ffffffff86055fdc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f39de256900 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=00007ffe78eb9000 CR3=0000000015a2e000 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=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