Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.444804] BUG: Bad rss-counter state mm:00000000f33db2b7 type:MM_FILEPAGES val:33 [ 31.445835] BUG: Bad rss-counter state mm:00000000f33db2b7 type:MM_ANONPAGES val:22 [ 31.610421] ================================================================== [ 31.611554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.612731] Read of size 8 at addr ffff88800f42c6b0 by task sshd/221 [ 31.613516] [ 31.613739] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.614572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.615551] Call Trace: [ 31.615891] [ 31.616233] dump_stack_lvl+0x91/0xf0 [ 31.616732] print_report+0xcc/0x620 [ 31.617222] ? __virt_addr_valid+0x102/0x340 [ 31.617771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.618379] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.619012] kasan_report+0xbe/0xf0 [ 31.619483] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.620106] vma_interval_tree_remove+0xc75/0xec0 [ 31.620712] vma_prepare+0xc54/0x11a0 [ 31.621208] __split_vma+0x5af/0x950 [ 31.621680] ? __pfx___split_vma+0x10/0x10 [ 31.622210] ? find_held_lock+0x2c/0x110 [ 31.622734] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.623325] ? lock_is_held_type+0x9f/0x120 [ 31.623868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.624462] ? mtree_range_walk+0x632/0x900 [ 31.625034] ? mas_walk+0x5c7/0x7c0 [ 31.625500] do_vmi_munmap+0x1f1/0x2b0 [ 31.625998] mmap_region+0x1f9/0x2660 [ 31.626478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.627003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.627719] ? __pfx_lock_acquire+0x10/0x10 [ 31.628244] ? __pfx_mmap_region+0x10/0x10 [ 31.628802] ? security_mmap_addr+0x7d/0xa0 [ 31.629320] ? get_unmapped_area+0x1f5/0x3f0 [ 31.629871] do_mmap+0x854/0xf00 [ 31.630300] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.630816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.631395] ksys_mmap_pgoff+0x3af/0x500 [ 31.631917] do_syscall_64+0x3f/0x90 [ 31.632391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.633067] RIP: 0033:0x7f3050987d82 [ 31.633515] 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 [ 31.635611] RSP: 002b:00007ffeca0a84c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.636516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3050987d82 [ 31.637368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f304fdc1000 [ 31.638212] RBP: 00007f304fdc1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.639064] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cbc6e7b20 [ 31.639897] R13: 00007ffeca0a84e0 R14: 00007ffeca0a8510 R15: 00007ffeca0a8870 [ 31.640748] [ 31.641042] [ 31.641251] Allocated by task 213: [ 31.641688] kasan_save_stack+0x22/0x50 [ 31.642195] kasan_set_track+0x25/0x30 [ 31.642677] __kasan_slab_alloc+0x59/0x70 [ 31.643218] kmem_cache_alloc+0x16b/0x370 [ 31.643746] vm_area_dup+0x20/0x160 [ 31.644193] __split_vma+0x170/0x950 [ 31.644642] split_vma+0xc6/0x110 [ 31.645104] mprotect_fixup+0x8d2/0xb30 [ 31.645593] do_mprotect_pkey+0x87e/0xd40 [ 31.646110] __x64_sys_mprotect+0x78/0xc0 [ 31.646621] do_syscall_64+0x3f/0x90 [ 31.647123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647770] [ 31.647983] Freed by task 203: [ 31.648369] kasan_save_stack+0x22/0x50 [ 31.648894] kasan_set_track+0x25/0x30 [ 31.649381] kasan_save_free_info+0x2b/0x50 [ 31.649917] __kasan_slab_free+0x10a/0x190 [ 31.650438] kmem_cache_free+0x10d/0x4d0 [ 31.650959] rcu_core+0x8c8/0x2860 [ 31.651400] __do_softirq+0x1b7/0x7d4 [ 31.651881] [ 31.652090] Last potentially related work creation: [ 31.652660] kasan_save_stack+0x22/0x50 [ 31.653181] __kasan_record_aux_stack+0x8e/0xa0 [ 31.653863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.654494] remove_vma+0x139/0x170 [ 31.654966] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.655507] do_vmi_munmap+0x1f1/0x2b0 [ 31.655994] __vm_munmap+0x138/0x3a0 [ 31.656449] __x64_sys_munmap+0x59/0x80 [ 31.656971] do_syscall_64+0x3f/0x90 [ 31.657438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.658078] [ 31.658287] The buggy address belongs to the object at ffff88800f42c658 [ 31.658287] which belongs to the cache vm_area_struct of size 168 [ 31.659748] The buggy address is located 88 bytes inside of [ 31.659748] freed 168-byte region [ffff88800f42c658, ffff88800f42c700) [ 31.661152] [ 31.661364] The buggy address belongs to the physical page: [ 31.662050] page:00000000ffcaa822 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf42c [ 31.663145] memcg:ffff88800de27201 [ 31.663560] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.664226] page_type: 0xffffffff() [ 31.664667] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.665578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de27201 [ 31.666472] page dumped because: kasan: bad access detected [ 31.667146] [ 31.667359] Memory state around the buggy address: [ 31.667931] ffff88800f42c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.668782] ffff88800f42c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.669620] >ffff88800f42c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.670469] ^ [ 31.671066] ffff88800f42c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.671927] ffff88800f42c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.672778] ================================================================== [ 31.673713] Disabling lock debugging due to kernel taint [ 33.902232] BUG: Bad rss-counter state mm:00000000ab4f2c9d type:MM_FILEPAGES val:33 [ 33.903254] BUG: Bad rss-counter state mm:00000000ab4f2c9d type:MM_ANONPAGES val:22 [ 34.460690] BUG: Bad rss-counter state mm:000000008c8bd723 type:MM_FILEPAGES val:33 [ 34.461912] BUG: Bad rss-counter state mm:000000008c8bd723 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10594' (ECDSA) to the list of known hosts. 2023/06/21 03:38:19 fuzzer started 2023/06/21 03:38:20 dialing manager at localhost:36067 2023/06/21 03:38:20 checking machine... 2023/06/21 03:38:20 checking revisions... [ 35.150701] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:38:20 testing simple program... [ 35.198896] cgroup: Unknown subsys name 'net' [ 35.254070] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:38:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d90080 RCX=0000000000000000 RDX=1ffff1100d9c72c3 RSI=ffff888008d90080 RDI=ffff88806ce39618 RBP=ffff88806ce395c0 RSP=ffff888008d9fca8 R8 =0000000000001800 R9 =ffff88806ce3965c R10=0000000000000000 R11=0000000000000001 R12=ffff888008d90100 R13=ffff88806ce395c0 R14=dffffc0000000000 R15=ffff88806ce39600 RIP=ffffffff81250225 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=00007f6d14f98008 CR3=000000000cad8000 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=ffdbd5e60c1f2b96164fbfaac0d92469 XMM02=000000000011b478ec2efd57dc4c00df XMM03=0000000000122588433870665fa47f19 XMM04=54669e54b76e53fb00000000000ae988 XMM05=19e9129bd510f23500000000001323f0 XMM06=339f5f430db7421b0000000000131258 XMM07=e042d86d42eb936e0000000000122808 XMM08=433870665fa47f19000000000011b4d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff810bd032 RDX=0000000000000006 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88806cf09990 R8 =ffffffff8608a556 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a10 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc6e 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 00007f5465b7b900 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=0000559f6cd64954 CR3=000000000ebf6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000