syzkaller login: [ 30.644878] BUG: Bad rss-counter state mm:000000000e5c9a3b type:MM_FILEPAGES val:33 [ 30.646206] BUG: Bad rss-counter state mm:000000000e5c9a3b type:MM_ANONPAGES val:22 [ 30.811369] ================================================================== [ 30.812447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813533] Read of size 8 at addr ffff88800eb19df0 by task sshd/220 [ 30.814440] [ 30.814666] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815562] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816595] Call Trace: [ 30.816927] [ 30.817222] dump_stack_lvl+0x91/0xf0 [ 30.817736] print_report+0xcc/0x620 [ 30.818249] ? __virt_addr_valid+0x102/0x340 [ 30.818814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819447] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820081] kasan_report+0xbe/0xf0 [ 30.820580] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821236] vma_interval_tree_remove+0xc75/0xec0 [ 30.821857] vma_prepare+0xc54/0x11a0 [ 30.822355] __split_vma+0x5af/0x950 [ 30.822848] ? __pfx___split_vma+0x10/0x10 [ 30.823395] ? find_held_lock+0x2c/0x110 [ 30.823940] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824546] ? lock_is_held_type+0x9f/0x120 [ 30.825114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.825740] ? mtree_range_walk+0x632/0x900 [ 30.826318] ? mas_walk+0x5c7/0x7c0 [ 30.826814] do_vmi_munmap+0x1f1/0x2b0 [ 30.827325] mmap_region+0x1f9/0x2660 [ 30.827829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.828368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829125] ? __pfx_lock_acquire+0x10/0x10 [ 30.829678] ? __pfx_mmap_region+0x10/0x10 [ 30.830231] ? security_mmap_addr+0x7d/0xa0 [ 30.830785] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831357] do_mmap+0x854/0xf00 [ 30.831812] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832351] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832962] ksys_mmap_pgoff+0x3af/0x500 [ 30.833487] do_syscall_64+0x3f/0x90 [ 30.833986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834664] RIP: 0033:0x7f8570435d82 [ 30.835137] 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 [ 30.837351] RSP: 002b:00007ffd3ac813d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.838303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8570435d82 [ 30.839192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f856f86f000 [ 30.840067] RBP: 00007f856f86f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.840951] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc832d6ec0 [ 30.841825] R13: 00007ffd3ac813f0 R14: 00007ffd3ac81420 R15: 00007ffd3ac81780 [ 30.842717] [ 30.843020] [ 30.843245] Allocated by task 213: [ 30.843687] kasan_save_stack+0x22/0x50 [ 30.844215] kasan_set_track+0x25/0x30 [ 30.844752] __kasan_slab_alloc+0x59/0x70 [ 30.845302] kmem_cache_alloc+0x16b/0x370 [ 30.845840] vm_area_dup+0x20/0x160 [ 30.846309] __split_vma+0x170/0x950 [ 30.846794] split_vma+0xc6/0x110 [ 30.847249] mprotect_fixup+0x8d2/0xb30 [ 30.847776] do_mprotect_pkey+0x87e/0xd40 [ 30.848334] __x64_sys_mprotect+0x78/0xc0 [ 30.848903] do_syscall_64+0x3f/0x90 [ 30.849410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850095] [ 30.850327] Freed by task 213: [ 30.850744] kasan_save_stack+0x22/0x50 [ 30.851284] kasan_set_track+0x25/0x30 [ 30.851795] kasan_save_free_info+0x2b/0x50 [ 30.852345] __kasan_slab_free+0x10a/0x190 [ 30.852905] kmem_cache_free+0x10d/0x4d0 [ 30.853434] rcu_core+0x8c8/0x2860 [ 30.853897] __do_softirq+0x1b7/0x7d4 [ 30.854400] [ 30.854632] Last potentially related work creation: [ 30.855260] kasan_save_stack+0x22/0x50 [ 30.855793] __kasan_record_aux_stack+0x8e/0xa0 [ 30.856401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.857121] remove_vma+0x139/0x170 [ 30.857606] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.858200] do_vmi_munmap+0x1f1/0x2b0 [ 30.858713] __vm_munmap+0x138/0x3a0 [ 30.859207] __x64_sys_munmap+0x59/0x80 [ 30.859740] do_syscall_64+0x3f/0x90 [ 30.860245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860938] [ 30.861170] The buggy address belongs to the object at ffff88800eb19d98 [ 30.861170] which belongs to the cache vm_area_struct of size 168 [ 30.862728] The buggy address is located 88 bytes inside of [ 30.862728] freed 168-byte region [ffff88800eb19d98, ffff88800eb19e40) [ 30.864182] [ 30.864409] The buggy address belongs to the physical page: [ 30.865107] page:000000007f6c93d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb19 [ 30.866237] memcg:ffff888010387701 [ 30.866681] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.867407] page_type: 0xffffffff() [ 30.867875] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.868865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010387701 [ 30.869900] page dumped because: kasan: bad access detected [ 30.870623] [ 30.870850] Memory state around the buggy address: [ 30.871445] ffff88800eb19c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.872338] ffff88800eb19d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.873264] >ffff88800eb19d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.874176] ^ [ 30.875049] ffff88800eb19e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.876009] ffff88800eb19e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.877138] ================================================================== [ 30.878389] Disabling lock debugging due to kernel taint [ 32.421908] BUG: Bad rss-counter state mm:000000000eb4c71a type:MM_FILEPAGES val:33 [ 32.422616] BUG: Bad rss-counter state mm:000000000eb4c71a type:MM_ANONPAGES val:22 [ 32.936493] BUG: Bad rss-counter state mm:00000000cf9b9185 type:MM_FILEPAGES val:33 [ 32.937695] BUG: Bad rss-counter state mm:00000000cf9b9185 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26933' (ECDSA) to the list of known hosts. 2023/06/21 03:24:49 fuzzer started 2023/06/21 03:24:50 dialing manager at localhost:36067 2023/06/21 03:24:50 checking machine... 2023/06/21 03:24:50 checking revisions... [ 33.584860] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:24:50 testing simple program... [ 33.627833] cgroup: Unknown subsys name 'net' [ 33.676590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:24:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000c RCX=0000000000000000 RDX=000000000000000c RSI=ffff88800fcdfe10 RDI=00007ffc94e751dc RBP=00007ffc94e751d8 RSP=ffff88800fcdfca0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000002 R11=00000000000b6a61 R12=000000000000000c R13=000000000000000c R14=ffff88800fcdfe10 R15=00007ffc94e751dc RIP=ffffffff8217bb6a RFL=00000293 [--S-A-C] 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 00007fb772174900 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=00007ffc94e76000 CR3=0000000015eba000 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=00007fd27a613c30 CR3=00000000144ee000 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=da40f0d6c45a0d83a04e5d67ce8a4880 XMM02=2c67c8bc2e329bc3000000000011d6f8 XMM03=fb795ef6d65770560000000000121e60 XMM04=ec0f0cb73b2a5d2700000000000ae988 XMM05=19e9129bd510f2350000000000131c48 XMM06=bef60d53e6a6abf90000000000130ab0 XMM07=e042d86d42eb936e00000000001220e0 XMM08=b81e11d591ebf794000000000011d758 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000