syzkaller login: [ 30.431713] BUG: Bad rss-counter state mm:00000000c83c6ea6 type:MM_FILEPAGES val:33 [ 30.432783] BUG: Bad rss-counter state mm:00000000c83c6ea6 type:MM_ANONPAGES val:22 [ 30.599590] ================================================================== [ 30.600846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.602286] Read of size 8 at addr ffff88800dc0bc20 by task sshd/222 [ 30.603285] [ 30.603571] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.604741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.606000] Call Trace: [ 30.606419] [ 30.606793] dump_stack_lvl+0x91/0xf0 [ 30.607426] print_report+0xcc/0x620 [ 30.608027] ? __virt_addr_valid+0x102/0x340 [ 30.608668] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.609419] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.610162] kasan_report+0xbe/0xf0 [ 30.610760] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.611574] vma_interval_tree_remove+0xc75/0xec0 [ 30.612316] vma_prepare+0xc54/0x11a0 [ 30.612888] __split_vma+0x5af/0x950 [ 30.613494] ? __pfx___split_vma+0x10/0x10 [ 30.614081] ? find_held_lock+0x2c/0x110 [ 30.614687] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.615374] ? lock_is_held_type+0x9f/0x120 [ 30.615990] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.616687] ? mtree_range_walk+0x632/0x900 [ 30.617341] ? mas_walk+0x5c7/0x7c0 [ 30.617878] do_vmi_munmap+0x1f1/0x2b0 [ 30.618421] mmap_region+0x1f9/0x2660 [ 30.619026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.619587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.620410] ? __pfx_lock_acquire+0x10/0x10 [ 30.621054] ? __pfx_mmap_region+0x10/0x10 [ 30.621664] ? security_mmap_addr+0x7d/0xa0 [ 30.622259] ? get_unmapped_area+0x1f5/0x3f0 [ 30.622922] do_mmap+0x854/0xf00 [ 30.623404] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.623969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.624693] ksys_mmap_pgoff+0x3af/0x500 [ 30.625245] do_syscall_64+0x3f/0x90 [ 30.625805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.626604] RIP: 0033:0x7f2947c15d82 [ 30.627153] 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 [ 30.629778] RSP: 002b:00007ffc0b0811e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.630923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2947c15d82 [ 30.631973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f294704f000 [ 30.632999] RBP: 00007f294704f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.634073] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b64c484d90 [ 30.635090] R13: 00007ffc0b081200 R14: 00007ffc0b081230 R15: 00007ffc0b081590 [ 30.636165] [ 30.636539] [ 30.636791] Allocated by task 215: [ 30.637285] kasan_save_stack+0x22/0x50 [ 30.637881] kasan_set_track+0x25/0x30 [ 30.638456] __kasan_slab_alloc+0x59/0x70 [ 30.639062] kmem_cache_alloc+0x16b/0x370 [ 30.639648] vm_area_dup+0x20/0x160 [ 30.640181] __split_vma+0x170/0x950 [ 30.640729] split_vma+0xc6/0x110 [ 30.641230] mprotect_fixup+0x8d2/0xb30 [ 30.641807] do_mprotect_pkey+0x87e/0xd40 [ 30.642414] __x64_sys_mprotect+0x78/0xc0 [ 30.643109] do_syscall_64+0x3f/0x90 [ 30.643622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.644436] [ 30.644674] Freed by task 215: [ 30.645124] kasan_save_stack+0x22/0x50 [ 30.645742] kasan_set_track+0x25/0x30 [ 30.646347] kasan_save_free_info+0x2b/0x50 [ 30.646930] __kasan_slab_free+0x10a/0x190 [ 30.647544] kmem_cache_free+0x10d/0x4d0 [ 30.648166] rcu_core+0x8c8/0x2860 [ 30.648690] __do_softirq+0x1b7/0x7d4 [ 30.649208] [ 30.649443] Last potentially related work creation: [ 30.650085] kasan_save_stack+0x22/0x50 [ 30.650647] __kasan_record_aux_stack+0x8e/0xa0 [ 30.651291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.651999] remove_vma+0x139/0x170 [ 30.652519] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.653131] do_vmi_munmap+0x1f1/0x2b0 [ 30.653715] __vm_munmap+0x138/0x3a0 [ 30.654273] __x64_sys_munmap+0x59/0x80 [ 30.654851] do_syscall_64+0x3f/0x90 [ 30.655374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656153] [ 30.656423] Second to last potentially related work creation: [ 30.657198] kasan_save_stack+0x22/0x50 [ 30.657807] __kasan_record_aux_stack+0x8e/0xa0 [ 30.658473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.659203] remove_vma+0x139/0x170 [ 30.659770] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.660436] do_vmi_munmap+0x1f1/0x2b0 [ 30.660978] mmap_region+0x1f9/0x2660 [ 30.661569] do_mmap+0x854/0xf00 [ 30.662054] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.662622] ksys_mmap_pgoff+0x7d/0x500 [ 30.663177] do_syscall_64+0x3f/0x90 [ 30.663782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664544] [ 30.664808] The buggy address belongs to the object at ffff88800dc0bbc8 [ 30.664808] which belongs to the cache vm_area_struct of size 168 [ 30.666498] The buggy address is located 88 bytes inside of [ 30.666498] freed 168-byte region [ffff88800dc0bbc8, ffff88800dc0bc70) [ 30.668128] [ 30.668396] The buggy address belongs to the physical page: [ 30.669126] page:000000001f8c77bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc0b [ 30.670311] memcg:ffff88800dcc2601 [ 30.670766] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.671572] page_type: 0xffffffff() [ 30.672111] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d5380 dead000000000005 [ 30.673170] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcc2601 [ 30.674166] page dumped because: kasan: bad access detected [ 30.674889] [ 30.675131] Memory state around the buggy address: [ 30.675791] ffff88800dc0bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.676772] ffff88800dc0bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.677802] >ffff88800dc0bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.678783] ^ [ 30.679369] ffff88800dc0bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.680413] ffff88800dc0bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.681362] ================================================================== [ 30.682371] Disabling lock debugging due to kernel taint [ 33.006561] BUG: Bad rss-counter state mm:00000000d07ed640 type:MM_FILEPAGES val:33 [ 33.007577] BUG: Bad rss-counter state mm:00000000d07ed640 type:MM_ANONPAGES val:22 [ 33.553540] BUG: Bad rss-counter state mm:00000000e4a9b5df type:MM_FILEPAGES val:33 [ 33.554755] BUG: Bad rss-counter state mm:00000000e4a9b5df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14264' (ECDSA) to the list of known hosts. 2023/06/20 11:12:11 fuzzer started 2023/06/20 11:12:11 dialing manager at localhost:36067 2023/06/20 11:12:11 checking machine... 2023/06/20 11:12:11 checking revisions... [ 34.256705] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:12:12 testing simple program... [ 34.304810] cgroup: Unknown subsys name 'net' [ 34.354846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:12:11 Registers: info registers vcpu 0 RAX=ffffffff86138e8d RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c5a7760 RSP=ffff88800c5a7698 R8 =ffffffff86138e90 R9 =ffff88800c5a7748 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800c5a7768 R13=ffff88800c5a7750 R14=ffff88800c5a7840 R15=ffff88800c5a7708 RIP=ffffffff81130b99 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 00007f6de54a0900 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=00007fff7fe0d000 CR3=0000000013a9a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007f4283694380 CR3=000000000e7f8000 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=bfdd6c729ff9a39daa4dabc4b1f8c470 XMM02=000000000011afb0eff9b2d0a8fce9cb XMM03=000000000011b0802c67c8bc2e329bc3 XMM04=f8d8436a092832eb00000000000ae988 XMM05=59d5b690e0af863b0000000000133768 XMM06=00c3ffa147b8d85700000000001335f0 XMM07=e042d86d42eb936e0000000000122838 XMM08=9c3e23458e0be61a000000000011b080 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000