syzkaller login: [ 57.771665] BUG: Bad rss-counter state mm:00000000b1ad9dfe type:MM_FILEPAGES val:33 [ 57.772685] BUG: Bad rss-counter state mm:00000000b1ad9dfe type:MM_ANONPAGES val:22 [ 57.936399] ================================================================== [ 57.937470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.938565] Read of size 8 at addr ffff88801a0c9b38 by task sshd/221 [ 57.939620] [ 57.939887] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.940930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.941940] Call Trace: [ 57.942261] [ 57.942555] dump_stack_lvl+0x91/0xf0 [ 57.943056] print_report+0xcc/0x620 [ 57.943543] ? __virt_addr_valid+0x102/0x340 [ 57.944122] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.944741] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.945358] kasan_report+0xbe/0xf0 [ 57.945835] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.946471] vma_interval_tree_remove+0xc75/0xec0 [ 57.947080] vma_prepare+0xc54/0x11a0 [ 57.947575] __split_vma+0x5af/0x950 [ 57.948071] ? __pfx___split_vma+0x10/0x10 [ 57.948598] ? find_held_lock+0x2c/0x110 [ 57.949120] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.949684] ? lock_is_held_type+0x9f/0x120 [ 57.950225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.950839] ? mtree_range_walk+0x632/0x900 [ 57.951386] ? mas_walk+0x5c7/0x7c0 [ 57.951865] do_vmi_munmap+0x1f1/0x2b0 [ 57.952393] mmap_region+0x1f9/0x2660 [ 57.952875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.953393] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.954102] ? __pfx_lock_acquire+0x10/0x10 [ 57.954636] ? __pfx_mmap_region+0x10/0x10 [ 57.955181] ? security_mmap_addr+0x7d/0xa0 [ 57.955721] ? get_unmapped_area+0x1f5/0x3f0 [ 57.956306] do_mmap+0x854/0xf00 [ 57.956760] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.957258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.957841] ksys_mmap_pgoff+0x3af/0x500 [ 57.958377] do_syscall_64+0x3f/0x90 [ 57.958873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.959546] RIP: 0033:0x7f81a3923d82 [ 57.960005] 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 [ 57.962208] RSP: 002b:00007ffeff947f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.963137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81a3923d82 [ 57.963994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81a2d5d000 [ 57.964890] RBP: 00007f81a2d5d000 R08: 0000000000000009 R09: 0000000000001000 [ 57.965739] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe6af1dec0 [ 57.966598] R13: 00007ffeff947f40 R14: 00007ffeff947f70 R15: 00007ffeff9482d0 [ 57.967482] [ 57.967783] [ 57.968002] Allocated by task 214: [ 57.968440] kasan_save_stack+0x22/0x50 [ 57.968951] kasan_set_track+0x25/0x30 [ 57.969445] __kasan_slab_alloc+0x59/0x70 [ 57.969967] kmem_cache_alloc+0x16b/0x370 [ 57.970492] vm_area_dup+0x20/0x160 [ 57.970948] __split_vma+0x170/0x950 [ 57.971425] split_vma+0xc6/0x110 [ 57.971861] mprotect_fixup+0x8d2/0xb30 [ 57.972370] do_mprotect_pkey+0x87e/0xd40 [ 57.972896] __x64_sys_mprotect+0x78/0xc0 [ 57.973426] do_syscall_64+0x3f/0x90 [ 57.973904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.974566] [ 57.974781] Freed by task 214: [ 57.975198] kasan_save_stack+0x22/0x50 [ 57.975723] kasan_set_track+0x25/0x30 [ 57.976275] kasan_save_free_info+0x2b/0x50 [ 57.976856] __kasan_slab_free+0x10a/0x190 [ 57.977415] kmem_cache_free+0x10d/0x4d0 [ 57.977934] rcu_core+0x8c8/0x2860 [ 57.978384] __do_softirq+0x1b7/0x7d4 [ 57.978863] [ 57.979083] Last potentially related work creation: [ 57.979696] kasan_save_stack+0x22/0x50 [ 57.980262] __kasan_record_aux_stack+0x8e/0xa0 [ 57.980854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.981517] remove_vma+0x139/0x170 [ 57.981987] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.982563] do_vmi_munmap+0x1f1/0x2b0 [ 57.983057] __vm_munmap+0x138/0x3a0 [ 57.983542] __x64_sys_munmap+0x59/0x80 [ 57.984061] do_syscall_64+0x3f/0x90 [ 57.984549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.985220] [ 57.985438] The buggy address belongs to the object at ffff88801a0c9ae0 [ 57.985438] which belongs to the cache vm_area_struct of size 168 [ 57.986926] The buggy address is located 88 bytes inside of [ 57.986926] freed 168-byte region [ffff88801a0c9ae0, ffff88801a0c9b88) [ 57.988371] [ 57.988595] The buggy address belongs to the physical page: [ 57.989274] page:00000000e2ad1011 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0c9 [ 57.990363] memcg:ffff88800ee59e01 [ 57.990798] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.991456] page_type: 0xffffffff() [ 57.991949] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.992919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee59e01 [ 57.993858] page dumped because: kasan: bad access detected [ 57.994553] [ 57.994769] Memory state around the buggy address: [ 57.995368] ffff88801a0c9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.996244] ffff88801a0c9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 57.997122] >ffff88801a0c9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.997996] ^ [ 57.998645] ffff88801a0c9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 57.999508] ffff88801a0c9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 58.000367] ================================================================== [ 58.001282] Disabling lock debugging due to kernel taint [ 59.973094] BUG: Bad rss-counter state mm:00000000b0faabac type:MM_FILEPAGES val:33 [ 59.974425] BUG: Bad rss-counter state mm:00000000b0faabac type:MM_ANONPAGES val:22 [ 60.430594] BUG: Bad rss-counter state mm:00000000dd263e0d type:MM_FILEPAGES val:33 [ 60.431571] BUG: Bad rss-counter state mm:00000000dd263e0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35401' (ECDSA) to the list of known hosts. 2023/06/19 15:23:53 fuzzer started 2023/06/19 15:23:53 dialing manager at localhost:44161 2023/06/19 15:23:53 checking machine... 2023/06/19 15:23:53 checking revisions... [ 61.179331] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:23:53 testing simple program... [ 61.232281] cgroup: Unknown subsys name 'net' [ 61.311224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:23:26 Registers: info registers vcpu 0 RAX=ffffffff81807d58 RBX=ffffffff85dfc4f4 RCX=ffffffff81807eba RDX=0000000000000000 RSI=ffffffff86136d7c RDI=ffffffff85dfc4f4 RBP=ffffffff85dfc4f8 RSP=ffff88806ce099e0 R8 =ffffffff86136d7c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020c48 R12=ffffffff85dfc4f4 R13=ffffffff85dfc4f4 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f7569b2e900 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=00007ffc581af000 CR3=000000000d52c000 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=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=00007fa13f59e2a0 CR3=00000000147a6000 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=2032353a33323a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a33323a3531203931 XMM08=00007f318c015d600000004c00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000