syzkaller login: [ 38.662645] BUG: Bad rss-counter state mm:000000007e252282 type:MM_FILEPAGES val:33 [ 38.664351] BUG: Bad rss-counter state mm:000000007e252282 type:MM_ANONPAGES val:22 [ 38.828391] ================================================================== [ 38.829323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.830261] Read of size 8 at addr ffff88800e2815c8 by task sshd/220 [ 38.831043] [ 38.831350] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.832215] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.833226] Call Trace: [ 38.833574] [ 38.833863] dump_stack_lvl+0x91/0xf0 [ 38.834390] print_report+0xcc/0x620 [ 38.834923] ? __virt_addr_valid+0x102/0x340 [ 38.835549] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.836291] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.837042] kasan_report+0xbe/0xf0 [ 38.837639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.838374] vma_interval_tree_remove+0xc75/0xec0 [ 38.839019] vma_prepare+0xc54/0x11a0 [ 38.839537] __split_vma+0x5af/0x950 [ 38.840043] ? __pfx___split_vma+0x10/0x10 [ 38.840615] ? find_held_lock+0x2c/0x110 [ 38.841179] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.841793] ? lock_is_held_type+0x9f/0x120 [ 38.842379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.843026] ? mtree_range_walk+0x632/0x900 [ 38.843639] ? mas_walk+0x5c7/0x7c0 [ 38.844170] do_vmi_munmap+0x1f1/0x2b0 [ 38.844724] mmap_region+0x1f9/0x2660 [ 38.845297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.845876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.846689] ? __pfx_lock_acquire+0x10/0x10 [ 38.847299] ? __pfx_mmap_region+0x10/0x10 [ 38.847889] ? security_mmap_addr+0x7d/0xa0 [ 38.848491] ? get_unmapped_area+0x1f5/0x3f0 [ 38.849117] do_mmap+0x854/0xf00 [ 38.849612] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.850169] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.850811] ksys_mmap_pgoff+0x3af/0x500 [ 38.851381] do_syscall_64+0x3f/0x90 [ 38.851935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.852650] RIP: 0033:0x7f99e1cb0d82 [ 38.853190] 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 [ 38.855594] RSP: 002b:00007fff5f31be68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.856639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99e1cb0d82 [ 38.857609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99e10ea000 [ 38.858557] RBP: 00007f99e10ea000 R08: 0000000000000009 R09: 0000000000001000 [ 38.859560] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c9a476f70 [ 38.860751] R13: 00007fff5f31be80 R14: 00007fff5f31beb0 R15: 00007fff5f31c210 [ 38.861832] [ 38.862142] [ 38.862375] Allocated by task 213: [ 38.862824] kasan_save_stack+0x22/0x50 [ 38.863392] kasan_set_track+0x25/0x30 [ 38.863954] __kasan_slab_alloc+0x59/0x70 [ 38.864542] kmem_cache_alloc+0x16b/0x370 [ 38.865134] vm_area_dup+0x20/0x160 [ 38.865644] __split_vma+0x170/0x950 [ 38.866172] split_vma+0xc6/0x110 [ 38.866664] mprotect_fixup+0x8d2/0xb30 [ 38.867229] do_mprotect_pkey+0x87e/0xd40 [ 38.867817] __x64_sys_mprotect+0x78/0xc0 [ 38.868401] do_syscall_64+0x3f/0x90 [ 38.868948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.869673] [ 38.869910] Freed by task 213: [ 38.870349] kasan_save_stack+0x22/0x50 [ 38.870910] kasan_set_track+0x25/0x30 [ 38.871474] kasan_save_free_info+0x2b/0x50 [ 38.872078] __kasan_slab_free+0x10a/0x190 [ 38.872676] kmem_cache_free+0x10d/0x4d0 [ 38.873272] rcu_core+0x8c8/0x2860 [ 38.873772] __do_softirq+0x1b7/0x7d4 [ 38.874317] [ 38.874562] Last potentially related work creation: [ 38.875230] kasan_save_stack+0x22/0x50 [ 38.875803] __kasan_record_aux_stack+0x8e/0xa0 [ 38.876446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.877192] remove_vma+0x139/0x170 [ 38.877698] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.878322] do_vmi_munmap+0x1f1/0x2b0 [ 38.878871] __vm_munmap+0x138/0x3a0 [ 38.879402] __x64_sys_munmap+0x59/0x80 [ 38.879956] do_syscall_64+0x3f/0x90 [ 38.880488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881245] [ 38.881485] Second to last potentially related work creation: [ 38.882243] kasan_save_stack+0x22/0x50 [ 38.882808] __kasan_record_aux_stack+0x8e/0xa0 [ 38.883451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.884174] remove_vma+0x139/0x170 [ 38.884677] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.885302] do_vmi_munmap+0x1f1/0x2b0 [ 38.885850] mmap_region+0x1f9/0x2660 [ 38.886385] do_mmap+0x854/0xf00 [ 38.886869] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.887414] ksys_mmap_pgoff+0x3af/0x500 [ 38.887970] do_syscall_64+0x3f/0x90 [ 38.888507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889246] [ 38.889491] The buggy address belongs to the object at ffff88800e281570 [ 38.889491] which belongs to the cache vm_area_struct of size 168 [ 38.891138] The buggy address is located 88 bytes inside of [ 38.891138] freed 168-byte region [ffff88800e281570, ffff88800e281618) [ 38.892716] [ 38.892977] The buggy address belongs to the physical page: [ 38.893716] page:000000006a0143fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe281 [ 38.894936] memcg:ffff88800ecbe401 [ 38.895418] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.896131] page_type: 0xffffffff() [ 38.896631] raw: 0100000000000200 ffff8880087a0c80 ffffea000059ae80 dead000000000004 [ 38.897685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecbe401 [ 38.898707] page dumped because: kasan: bad access detected [ 38.899445] [ 38.899686] Memory state around the buggy address: [ 38.900341] ffff88800e281480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.901307] ffff88800e281500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.902262] >ffff88800e281580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.903221] ^ [ 38.903959] ffff88800e281600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.904915] ffff88800e281680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.905862] ================================================================== [ 38.906980] Disabling lock debugging due to kernel taint [ 41.315508] BUG: Bad rss-counter state mm:0000000089267fe2 type:MM_FILEPAGES val:33 [ 41.317697] BUG: Bad rss-counter state mm:0000000089267fe2 type:MM_ANONPAGES val:22 [ 41.850349] BUG: Bad rss-counter state mm:0000000083248b78 type:MM_FILEPAGES val:33 [ 41.851652] BUG: Bad rss-counter state mm:0000000083248b78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36265' (ECDSA) to the list of known hosts. 2023/06/20 17:57:48 fuzzer started 2023/06/20 17:57:48 dialing manager at localhost:36067 2023/06/20 17:57:48 checking machine... 2023/06/20 17:57:48 checking revisions... [ 42.608841] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:57:48 testing simple program... [ 42.664549] cgroup: Unknown subsys name 'net' [ 42.716107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:57:48 Registers: info registers vcpu 0 RAX=ffff88806ce2ba10 RBX=ffff8880087f2800 RCX=0000000000000000 RDX=1ffff1100d9c5743 RSI=ffff88806ce2ba10 RDI=ffff88806ce2c250 RBP=ffff88806ce2c250 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=dffffc0000000000 R13=00000009b34eedc0 R14=0000000000000001 R15=ffff8880087f2810 RIP=ffffffff844d3c64 RFL=00000046 [---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 00007fa33abc1900 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=00007fa339fd0bf0 CR3=000000000d6f0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ad05e25e4a6f5ce700000000000ae988 XMM05=fef7c1a6a8bedb5f00000000001333e8 XMM06=19e9129bd510f23500000000001321c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab1b24 RDI=ffff888016ce55b4 RBP=ffff888016ce51c0 RSP=ffff888016e574d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000dad00000dad R12=0000000000000000 R13=00000000000000ba R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff813744e1 RFL=00000213 [----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 00007fdb2b0b2900 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=00007ffe9c765000 CR3=00000000101dc000 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