syzkaller login: [ 38.537472] BUG: Bad rss-counter state mm:000000001da5caae type:MM_FILEPAGES val:33 [ 38.538648] BUG: Bad rss-counter state mm:000000001da5caae type:MM_ANONPAGES val:22 [ 38.583473] ================================================================== [ 38.584466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.585617] Read of size 8 at addr ffff8880167b9798 by task sshd/221 [ 38.586537] [ 38.586756] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.587636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.588639] Call Trace: [ 38.588975] [ 38.589270] dump_stack_lvl+0x91/0xf0 [ 38.589766] print_report+0xcc/0x620 [ 38.590276] ? __virt_addr_valid+0x102/0x340 [ 38.590846] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.591473] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.592102] kasan_report+0xbe/0xf0 [ 38.592596] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.593239] vma_interval_tree_remove+0xc75/0xec0 [ 38.593866] vma_prepare+0xc54/0x11a0 [ 38.594363] __split_vma+0x5af/0x950 [ 38.594850] ? __pfx___split_vma+0x10/0x10 [ 38.595385] ? find_held_lock+0x2c/0x110 [ 38.595924] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.596494] ? lock_is_held_type+0x9f/0x120 [ 38.597054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.597684] ? mtree_range_walk+0x632/0x900 [ 38.598264] ? mas_walk+0x5c7/0x7c0 [ 38.598745] do_vmi_munmap+0x1f1/0x2b0 [ 38.599252] mmap_region+0x1f9/0x2660 [ 38.599735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.600264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.601003] ? __pfx_lock_acquire+0x10/0x10 [ 38.601559] ? __pfx_mmap_region+0x10/0x10 [ 38.602125] ? security_mmap_addr+0x7d/0xa0 [ 38.602669] ? get_unmapped_area+0x1f5/0x3f0 [ 38.603243] do_mmap+0x854/0xf00 [ 38.603691] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.604200] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.604778] ksys_mmap_pgoff+0x3af/0x500 [ 38.605335] do_syscall_64+0x3f/0x90 [ 38.605832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.606504] RIP: 0033:0x7f75c5de9d82 [ 38.606981] 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 [ 38.609167] RSP: 002b:00007ffee69ee9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.610140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75c5de9d82 [ 38.611008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75c5223000 [ 38.611866] RBP: 00007f75c5223000 R08: 0000000000000009 R09: 0000000000001000 [ 38.612717] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea79f94f70 [ 38.613592] R13: 00007ffee69eea10 R14: 00007ffee69eea40 R15: 00007ffee69eeda0 [ 38.614470] [ 38.614763] [ 38.614994] Allocated by task 214: [ 38.615417] kasan_save_stack+0x22/0x50 [ 38.615936] kasan_set_track+0x25/0x30 [ 38.616441] __kasan_slab_alloc+0x59/0x70 [ 38.616971] kmem_cache_alloc+0x16b/0x370 [ 38.617519] vm_area_dup+0x20/0x160 [ 38.617993] __split_vma+0x170/0x950 [ 38.618460] split_vma+0xc6/0x110 [ 38.618920] mprotect_fixup+0x8d2/0xb30 [ 38.619428] do_mprotect_pkey+0x87e/0xd40 [ 38.619953] __x64_sys_mprotect+0x78/0xc0 [ 38.620480] do_syscall_64+0x3f/0x90 [ 38.620970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.621627] [ 38.621867] Freed by task 203: [ 38.622317] kasan_save_stack+0x22/0x50 [ 38.622844] kasan_set_track+0x25/0x30 [ 38.623431] kasan_save_free_info+0x2b/0x50 [ 38.623980] __kasan_slab_free+0x10a/0x190 [ 38.624514] kmem_cache_free+0x10d/0x4d0 [ 38.625037] rcu_core+0x8c8/0x2860 [ 38.625490] __do_softirq+0x1b7/0x7d4 [ 38.625966] [ 38.626181] Last potentially related work creation: [ 38.626845] kasan_save_stack+0x22/0x50 [ 38.627373] __kasan_record_aux_stack+0x8e/0xa0 [ 38.627967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.628663] remove_vma+0x139/0x170 [ 38.629117] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.629696] do_vmi_munmap+0x1f1/0x2b0 [ 38.630194] __vm_munmap+0x138/0x3a0 [ 38.630665] __x64_sys_munmap+0x59/0x80 [ 38.631169] do_syscall_64+0x3f/0x90 [ 38.631655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.632344] [ 38.632573] The buggy address belongs to the object at ffff8880167b9740 [ 38.632573] which belongs to the cache vm_area_struct of size 168 [ 38.634146] The buggy address is located 88 bytes inside of [ 38.634146] freed 168-byte region [ffff8880167b9740, ffff8880167b97e8) [ 38.635651] [ 38.635879] The buggy address belongs to the physical page: [ 38.636584] page:0000000072d9061c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167b9 [ 38.637758] memcg:ffff88800c925b01 [ 38.638204] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.638888] page_type: 0xffffffff() [ 38.639366] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.640338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c925b01 [ 38.641334] page dumped because: kasan: bad access detected [ 38.642040] [ 38.642263] Memory state around the buggy address: [ 38.642870] ffff8880167b9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.643793] ffff8880167b9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.644715] >ffff8880167b9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.645649] ^ [ 38.646166] ffff8880167b9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.647081] ffff8880167b9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.647992] ================================================================== [ 38.649002] Disabling lock debugging due to kernel taint [ 41.256537] BUG: Bad rss-counter state mm:00000000c3d10794 type:MM_FILEPAGES val:33 [ 41.257067] BUG: Bad rss-counter state mm:00000000c3d10794 type:MM_ANONPAGES val:22 [ 41.703410] BUG: Bad rss-counter state mm:000000003faecc41 type:MM_FILEPAGES val:33 [ 41.704413] BUG: Bad rss-counter state mm:000000003faecc41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29732' (ECDSA) to the list of known hosts. 2023/06/20 07:04:25 fuzzer started 2023/06/20 07:04:26 dialing manager at localhost:44161 2023/06/20 07:04:26 checking machine... 2023/06/20 07:04:26 checking revisions... [ 42.447256] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:04:26 testing simple program... [ 42.497862] cgroup: Unknown subsys name 'net' [ 42.560369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:04:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801b1ccdc0 RCX=ffffffff81acd587 RDX=1ffff110027fdc74 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff888013fee3a0 RSP=ffff88800f187858 R8 =0000000000000000 R9 =ffffed10027fdc74 R10=ffff888013fee3a7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff8880197482b0 R15=ffff88800f1879d8 RIP=ffffffff814c0324 RFL=00000202 [-------] 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 00007fc2d3c29700 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=00007f1df49580b0 CR3=000000000d612000 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=2035323a34303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a34303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb788ec55e0 CR3=000000000cb56000 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=82ffbba18880ed82634ea44e78ed3e48 XMM02=000000000011c8c0eff9b2d0a8fce9cb XMM03=000000000011c9902c67c8bc2e329bc3 XMM04=01265c00afc9bc3600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133920 XMM06=565abb65bf28d88d0000000000132788 XMM07=e042d86d42eb936e0000000000124018 XMM08=6d7d3cac50cc3d53000000000011c990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000