syzkaller login: [ 43.096041] BUG: Bad rss-counter state mm:0000000001e53001 type:MM_FILEPAGES val:33 [ 43.097085] BUG: Bad rss-counter state mm:0000000001e53001 type:MM_ANONPAGES val:22 [ 43.267578] ================================================================== [ 43.268883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.270122] Read of size 8 at addr ffff88800dfbe5c8 by task sshd/219 [ 43.271156] [ 43.271442] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.272572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.273864] Call Trace: [ 43.274281] [ 43.274589] dump_stack_lvl+0x91/0xf0 [ 43.275232] print_report+0xcc/0x620 [ 43.275879] ? __virt_addr_valid+0x102/0x340 [ 43.276658] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.277385] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.278046] kasan_report+0xbe/0xf0 [ 43.278549] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.279349] vma_interval_tree_remove+0xc75/0xec0 [ 43.280135] vma_prepare+0xc54/0x11a0 [ 43.280697] __split_vma+0x5af/0x950 [ 43.281184] ? __pfx___split_vma+0x10/0x10 [ 43.281736] ? find_held_lock+0x2c/0x110 [ 43.282277] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.282990] ? lock_is_held_type+0x9f/0x120 [ 43.283692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.284344] ? mtree_range_walk+0x632/0x900 [ 43.284931] ? mas_walk+0x5c7/0x7c0 [ 43.285411] do_vmi_munmap+0x1f1/0x2b0 [ 43.285928] mmap_region+0x1f9/0x2660 [ 43.286422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.287034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.287792] ? __pfx_lock_acquire+0x10/0x10 [ 43.288342] ? __pfx_mmap_region+0x10/0x10 [ 43.288912] ? security_mmap_addr+0x7d/0xa0 [ 43.289478] ? get_unmapped_area+0x1f5/0x3f0 [ 43.290067] do_mmap+0x854/0xf00 [ 43.290528] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.291069] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.291646] ksys_mmap_pgoff+0x3af/0x500 [ 43.292172] do_syscall_64+0x3f/0x90 [ 43.292672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.293336] RIP: 0033:0x7efe91e25d82 [ 43.293822] 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 [ 43.296015] RSP: 002b:00007fff1db19928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.296944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe91e25d82 [ 43.297841] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe9125f000 [ 43.298709] RBP: 00007efe9125f000 R08: 0000000000000009 R09: 0000000000001000 [ 43.299589] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d3c551ec0 [ 43.300478] R13: 00007fff1db19940 R14: 00007fff1db19970 R15: 00007fff1db19cd0 [ 43.301508] [ 43.301891] [ 43.302121] Allocated by task 212: [ 43.302555] kasan_save_stack+0x22/0x50 [ 43.303094] kasan_set_track+0x25/0x30 [ 43.303599] __kasan_slab_alloc+0x59/0x70 [ 43.304133] kmem_cache_alloc+0x16b/0x370 [ 43.304686] vm_area_dup+0x20/0x160 [ 43.305162] __split_vma+0x170/0x950 [ 43.305640] split_vma+0xc6/0x110 [ 43.306127] mprotect_fixup+0x8d2/0xb30 [ 43.306638] do_mprotect_pkey+0x87e/0xd40 [ 43.307175] __x64_sys_mprotect+0x78/0xc0 [ 43.307697] do_syscall_64+0x3f/0x90 [ 43.308170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.308861] [ 43.309090] Freed by task 212: [ 43.309495] kasan_save_stack+0x22/0x50 [ 43.310003] kasan_set_track+0x25/0x30 [ 43.310496] kasan_save_free_info+0x2b/0x50 [ 43.311032] __kasan_slab_free+0x10a/0x190 [ 43.311567] kmem_cache_free+0x10d/0x4d0 [ 43.312215] rcu_core+0x8c8/0x2860 [ 43.312846] __do_softirq+0x1b7/0x7d4 [ 43.313483] [ 43.313770] Last potentially related work creation: [ 43.314543] kasan_save_stack+0x22/0x50 [ 43.315213] __kasan_record_aux_stack+0x8e/0xa0 [ 43.315972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.316859] remove_vma+0x139/0x170 [ 43.317439] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.318143] do_vmi_munmap+0x1f1/0x2b0 [ 43.318712] __vm_munmap+0x138/0x3a0 [ 43.319188] __x64_sys_munmap+0x59/0x80 [ 43.319706] do_syscall_64+0x3f/0x90 [ 43.320240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.320921] [ 43.321141] The buggy address belongs to the object at ffff88800dfbe570 [ 43.321141] which belongs to the cache vm_area_struct of size 168 [ 43.322663] The buggy address is located 88 bytes inside of [ 43.322663] freed 168-byte region [ffff88800dfbe570, ffff88800dfbe618) [ 43.324207] [ 43.324443] The buggy address belongs to the physical page: [ 43.325128] page:000000003dfb11fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfbe [ 43.326227] memcg:ffff88800cffcc01 [ 43.326687] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.327395] page_type: 0xffffffff() [ 43.327872] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.328832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cffcc01 [ 43.329766] page dumped because: kasan: bad access detected [ 43.330428] [ 43.330658] Memory state around the buggy address: [ 43.331250] ffff88800dfbe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.332159] ffff88800dfbe500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 43.333059] >ffff88800dfbe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.333923] ^ [ 43.334592] ffff88800dfbe600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 43.335453] ffff88800dfbe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.336331] ================================================================== [ 43.337419] Disabling lock debugging due to kernel taint [ 45.334251] BUG: Bad rss-counter state mm:00000000d83e5903 type:MM_FILEPAGES val:33 [ 45.335507] BUG: Bad rss-counter state mm:00000000d83e5903 type:MM_ANONPAGES val:22 [ 45.715283] BUG: Bad rss-counter state mm:00000000f081abd9 type:MM_FILEPAGES val:33 [ 45.716806] BUG: Bad rss-counter state mm:00000000f081abd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52252' (ECDSA) to the list of known hosts. 2023/06/19 12:45:23 fuzzer started 2023/06/19 12:45:23 dialing manager at localhost:44161 2023/06/19 12:45:23 checking machine... 2023/06/19 12:45:23 checking revisions... [ 46.463857] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:45:23 testing simple program... [ 46.506139] cgroup: Unknown subsys name 'net' [ 46.543573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f47bbc1ea60 CR3=000000000c652000 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=4261e945890b5691a24c459c9ab0274a XMM02=000000000011d308ec2efd57dc4c00df XMM03=0000000000123ca83dfadf6a05f948ec XMM04=a18ed9e018bd5a4500000000000ae988 XMM05=dfcdbad4f1609c370000000000133fd0 XMM06=8ccccf47e2a6cfcb0000000000132758 XMM07=e042d86d42eb936e0000000000123f28 XMM08=3dfadf6a05f948ec000000000011d368 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09928 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 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 00007f7a65062900 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=00007ffd6ed68000 CR3=000000001c8b2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000