syzkaller login: [ 50.674754] BUG: Bad rss-counter state mm:00000000e2204479 type:MM_FILEPAGES val:33 [ 50.675761] BUG: Bad rss-counter state mm:00000000e2204479 type:MM_ANONPAGES val:22 [ 50.835074] ================================================================== [ 50.836166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.837262] Read of size 8 at addr ffff88800d926310 by task sshd/220 [ 50.838366] [ 50.838630] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.839646] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.840776] Call Trace: [ 50.841098] [ 50.841385] dump_stack_lvl+0x91/0xf0 [ 50.841887] print_report+0xcc/0x620 [ 50.842366] ? __virt_addr_valid+0x102/0x340 [ 50.842917] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.843527] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.844140] kasan_report+0xbe/0xf0 [ 50.844612] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.845237] vma_interval_tree_remove+0xc75/0xec0 [ 50.845858] vma_prepare+0xc54/0x11a0 [ 50.846343] __split_vma+0x5af/0x950 [ 50.846826] ? __pfx___split_vma+0x10/0x10 [ 50.847363] ? find_held_lock+0x2c/0x110 [ 50.847907] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.848474] ? lock_is_held_type+0x9f/0x120 [ 50.849006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.849623] ? mtree_range_walk+0x632/0x900 [ 50.850171] ? mas_walk+0x5c7/0x7c0 [ 50.850644] do_vmi_munmap+0x1f1/0x2b0 [ 50.851139] mmap_region+0x1f9/0x2660 [ 50.851623] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.852135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.852838] ? __pfx_lock_acquire+0x10/0x10 [ 50.853363] ? __pfx_mmap_region+0x10/0x10 [ 50.853895] ? security_mmap_addr+0x7d/0xa0 [ 50.854420] ? get_unmapped_area+0x1f5/0x3f0 [ 50.854965] do_mmap+0x854/0xf00 [ 50.855398] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.855887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.856441] ksys_mmap_pgoff+0x3af/0x500 [ 50.856952] do_syscall_64+0x3f/0x90 [ 50.857423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.858077] RIP: 0033:0x7fd6b3d3ed82 [ 50.858534] 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 [ 50.860648] RSP: 002b:00007ffea61d7148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.861543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6b3d3ed82 [ 50.862409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6b3178000 [ 50.863246] RBP: 00007fd6b3178000 R08: 0000000000000009 R09: 0000000000001000 [ 50.864081] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c9b884ec0 [ 50.864921] R13: 00007ffea61d7160 R14: 00007ffea61d7190 R15: 00007ffea61d74f0 [ 50.865789] [ 50.866082] [ 50.866295] Allocated by task 213: [ 50.866732] kasan_save_stack+0x22/0x50 [ 50.867236] kasan_set_track+0x25/0x30 [ 50.867723] __kasan_slab_alloc+0x59/0x70 [ 50.868240] kmem_cache_alloc+0x16b/0x370 [ 50.868769] vm_area_dup+0x20/0x160 [ 50.869218] __split_vma+0x170/0x950 [ 50.869696] split_vma+0xc6/0x110 [ 50.870134] mprotect_fixup+0x8d2/0xb30 [ 50.870636] do_mprotect_pkey+0x87e/0xd40 [ 50.871153] __x64_sys_mprotect+0x78/0xc0 [ 50.871667] do_syscall_64+0x3f/0x90 [ 50.872135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.872776] [ 50.872990] Freed by task 213: [ 50.873379] kasan_save_stack+0x22/0x50 [ 50.873885] kasan_set_track+0x25/0x30 [ 50.874380] kasan_save_free_info+0x2b/0x50 [ 50.874914] __kasan_slab_free+0x10a/0x190 [ 50.875455] kmem_cache_free+0x10d/0x4d0 [ 50.875964] rcu_core+0x8c8/0x2860 [ 50.876413] __do_softirq+0x1b7/0x7d4 [ 50.876884] [ 50.877100] Last potentially related work creation: [ 50.877697] kasan_save_stack+0x22/0x50 [ 50.878200] __kasan_record_aux_stack+0x8e/0xa0 [ 50.878773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.879513] remove_vma+0x139/0x170 [ 50.879967] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.880521] do_vmi_munmap+0x1f1/0x2b0 [ 50.881010] __vm_munmap+0x138/0x3a0 [ 50.881476] __x64_sys_munmap+0x59/0x80 [ 50.881981] do_syscall_64+0x3f/0x90 [ 50.882451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.883083] [ 50.883299] The buggy address belongs to the object at ffff88800d9262b8 [ 50.883299] which belongs to the cache vm_area_struct of size 168 [ 50.884759] The buggy address is located 88 bytes inside of [ 50.884759] freed 168-byte region [ffff88800d9262b8, ffff88800d926360) [ 50.886204] [ 50.886422] The buggy address belongs to the physical page: [ 50.887091] page:00000000214669a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd926 [ 50.888177] memcg:ffff88800dc3d701 [ 50.888610] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.889258] page_type: 0xffffffff() [ 50.889721] raw: 0100000000000200 ffff88800879fc80 ffffea000036f440 dead000000000006 [ 50.890663] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc3d701 [ 50.891579] page dumped because: kasan: bad access detected [ 50.892259] [ 50.892477] Memory state around the buggy address: [ 50.893061] ffff88800d926200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 50.893938] ffff88800d926280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 50.894797] >ffff88800d926300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 50.895653] ^ [ 50.896121] ffff88800d926380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.896974] ffff88800d926400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 50.897827] ================================================================== [ 50.898740] Disabling lock debugging due to kernel taint [ 52.651924] BUG: Bad rss-counter state mm:00000000ad237960 type:MM_FILEPAGES val:33 [ 52.652577] BUG: Bad rss-counter state mm:00000000ad237960 type:MM_ANONPAGES val:22 [ 53.077708] BUG: Bad rss-counter state mm:00000000de77c3a6 type:MM_FILEPAGES val:33 [ 53.078907] BUG: Bad rss-counter state mm:00000000de77c3a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12950' (ECDSA) to the list of known hosts. 2023/06/19 15:14:01 fuzzer started 2023/06/19 15:14:02 dialing manager at localhost:44161 2023/06/19 15:14:02 checking machine... 2023/06/19 15:14:02 checking revisions... [ 53.650509] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:14:02 testing simple program... [ 53.695323] cgroup: Unknown subsys name 'net' [ 53.740420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:13:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7625174150 CR3=000000000ed2e000 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=2031303a34313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a34313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000005 RCX=ffffffff84493f70 RDX=ffff888018c351c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88801018f818 RSP=ffff88801018f060 R8 =0000000000000007 R9 =00000000000000f8 R10=0000000000000028 R11=00005564cb3cc000 R12=0000000000000028 R13=00007feeb2ccdfff R14=ffff88801018f708 R15=0000000000000005 RIP=ffffffff814c01fc 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 00007feeb2c99900 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=00007feeb2c63008 CR3=000000001c94c000 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=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