syzkaller login: [ 38.927467] BUG: Bad rss-counter state mm:00000000b4b46b9d type:MM_FILEPAGES val:33 [ 38.928714] BUG: Bad rss-counter state mm:00000000b4b46b9d type:MM_ANONPAGES val:22 [ 38.968405] ================================================================== [ 38.969350] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.970341] Read of size 8 at addr ffff88800f7266b0 by task sshd/226 [ 38.971252] [ 38.971457] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.972364] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.973394] Call Trace: [ 38.973747] [ 38.974099] dump_stack_lvl+0x91/0xf0 [ 38.974563] print_report+0xcc/0x620 [ 38.975034] ? __virt_addr_valid+0x102/0x340 [ 38.975562] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976142] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976715] kasan_report+0xbe/0xf0 [ 38.977165] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.977751] vma_interval_tree_remove+0xc75/0xec0 [ 38.978319] vma_prepare+0xc54/0x11a0 [ 38.978771] __split_vma+0x5af/0x950 [ 38.979222] ? __pfx___split_vma+0x10/0x10 [ 38.979719] ? find_held_lock+0x2c/0x110 [ 38.980212] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.980749] ? lock_is_held_type+0x9f/0x120 [ 38.981283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.981890] ? mtree_range_walk+0x632/0x900 [ 38.982444] ? mas_walk+0x5c7/0x7c0 [ 38.982921] do_vmi_munmap+0x1f1/0x2b0 [ 38.983425] mmap_region+0x1f9/0x2660 [ 38.983899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.984410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.985124] ? __pfx_lock_acquire+0x10/0x10 [ 38.985649] ? __pfx_mmap_region+0x10/0x10 [ 38.986174] ? security_mmap_addr+0x7d/0xa0 [ 38.986700] ? get_unmapped_area+0x1f5/0x3f0 [ 38.987253] do_mmap+0x854/0xf00 [ 38.987688] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.988168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.988740] ksys_mmap_pgoff+0x3af/0x500 [ 38.989245] do_syscall_64+0x3f/0x90 [ 38.989725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.990369] RIP: 0033:0x7f335769ad82 [ 38.990817] 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 [ 38.992924] RSP: 002b:00007ffd139e5158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.993829] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f335769ad82 [ 38.994675] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3356ad4000 [ 38.995520] RBP: 00007f3356ad4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.996350] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7b7b66ec0 [ 38.997195] R13: 00007ffd139e5170 R14: 00007ffd139e51a0 R15: 00007ffd139e5500 [ 38.998046] [ 38.998335] [ 38.998548] Allocated by task 219: [ 38.998974] kasan_save_stack+0x22/0x50 [ 38.999482] kasan_set_track+0x25/0x30 [ 38.999970] __kasan_slab_alloc+0x59/0x70 [ 39.000490] kmem_cache_alloc+0x16b/0x370 [ 39.001002] vm_area_dup+0x20/0x160 [ 39.001447] __split_vma+0x170/0x950 [ 39.001914] split_vma+0xc6/0x110 [ 39.002346] mprotect_fixup+0x8d2/0xb30 [ 39.002842] do_mprotect_pkey+0x87e/0xd40 [ 39.003363] __x64_sys_mprotect+0x78/0xc0 [ 39.003886] do_syscall_64+0x3f/0x90 [ 39.004371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005010] [ 39.005223] Freed by task 219: [ 39.005609] kasan_save_stack+0x22/0x50 [ 39.006117] kasan_set_track+0x25/0x30 [ 39.006603] kasan_save_free_info+0x2b/0x50 [ 39.007155] __kasan_slab_free+0x10a/0x190 [ 39.007683] kmem_cache_free+0x10d/0x4d0 [ 39.008199] rcu_core+0x8c8/0x2860 [ 39.008644] __do_softirq+0x1b7/0x7d4 [ 39.009111] [ 39.009324] Last potentially related work creation: [ 39.009906] kasan_save_stack+0x22/0x50 [ 39.010400] __kasan_record_aux_stack+0x8e/0xa0 [ 39.010961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.011606] remove_vma+0x139/0x170 [ 39.012063] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.012661] do_vmi_munmap+0x1f1/0x2b0 [ 39.013147] __vm_munmap+0x138/0x3a0 [ 39.013617] __x64_sys_munmap+0x59/0x80 [ 39.014105] do_syscall_64+0x3f/0x90 [ 39.014570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.015216] [ 39.015430] The buggy address belongs to the object at ffff88800f726658 [ 39.015430] which belongs to the cache vm_area_struct of size 168 [ 39.016908] The buggy address is located 88 bytes inside of [ 39.016908] freed 168-byte region [ffff88800f726658, ffff88800f726700) [ 39.018305] [ 39.018521] The buggy address belongs to the physical page: [ 39.019179] page:0000000009c49bc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf726 [ 39.020254] memcg:ffff888018fd4a01 [ 39.020675] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.021322] page_type: 0xffffffff() [ 39.021777] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.022696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fd4a01 [ 39.023595] page dumped because: kasan: bad access detected [ 39.024249] [ 39.024461] Memory state around the buggy address: [ 39.025049] ffff88800f726580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.025897] ffff88800f726600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.026744] >ffff88800f726680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.027597] ^ [ 39.028180] ffff88800f726700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.029037] ffff88800f726780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.029880] ================================================================== [ 39.030894] Disabling lock debugging due to kernel taint [ 41.016042] BUG: Bad rss-counter state mm:0000000034ab3c08 type:MM_FILEPAGES val:33 [ 41.017800] BUG: Bad rss-counter state mm:0000000034ab3c08 type:MM_ANONPAGES val:22 [ 41.509214] BUG: Bad rss-counter state mm:00000000a7a95951 type:MM_FILEPAGES val:33 [ 41.510380] BUG: Bad rss-counter state mm:00000000a7a95951 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34852' (ECDSA) to the list of known hosts. 2023/06/21 03:44:25 fuzzer started 2023/06/21 03:44:25 dialing manager at localhost:36067 2023/06/21 03:44:25 checking machine... 2023/06/21 03:44:25 checking revisions... [ 42.299713] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:44:25 testing simple program... [ 42.350682] cgroup: Unknown subsys name 'net' [ 42.394038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:44:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002cb5f02 RSI=ffffffff8363e064 RDI=ffff8880165af810 RBP=ffff8880165af8a8 RSP=ffff8880165af7e8 R8 =0000000000000001 R9 =ffff8880165af850 R10=0000000000038001 R11=000000000008a88c R12=ffff8880165af8d8 R13=0000000000000000 R14=ffff88800e381b40 R15=ffff8880165af810 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007f49f37c5900 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=00007ffcd13bd000 CR3=000000000e97c000 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=ffff888008c04400 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=00007f170aecc0b0 CR3=000000000d912000 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=48c4d3e1f9d17e956447a35953e6df86 XMM02=ec2efd57dc4c00df000000000011bff0 XMM03=0d66be591e89fd75000000000011c0c0 XMM04=3322ea8d318002d300000000000ae988 XMM05=762f2b3534e1c3010000000000132f28 XMM06=13e856d8d71426c80000000000131c58 XMM07=e042d86d42eb936e0000000000122540 XMM08=0d66be591e89fd75000000000011c0c0 XMM09=00000000000000000000000000000000 XMM10=00000020000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000