syzkaller login: [ 31.675147] BUG: Bad rss-counter state mm:00000000b4de1aec type:MM_FILEPAGES val:33 [ 31.676364] BUG: Bad rss-counter state mm:00000000b4de1aec type:MM_ANONPAGES val:22 [ 31.716335] ================================================================== [ 31.717291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.718275] Read of size 8 at addr ffff88800cb9aa50 by task sshd/219 [ 31.719171] [ 31.719407] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.720308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.721346] Call Trace: [ 31.721707] [ 31.722019] dump_stack_lvl+0x91/0xf0 [ 31.722535] print_report+0xcc/0x620 [ 31.723047] ? __virt_addr_valid+0x102/0x340 [ 31.723638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.724292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.724939] kasan_report+0xbe/0xf0 [ 31.725443] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.726120] vma_interval_tree_remove+0xc75/0xec0 [ 31.726755] vma_prepare+0xc54/0x11a0 [ 31.727273] __split_vma+0x5af/0x950 [ 31.727778] ? __pfx___split_vma+0x10/0x10 [ 31.728328] ? find_held_lock+0x2c/0x110 [ 31.728877] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.729474] ? lock_is_held_type+0x9f/0x120 [ 31.730085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.730728] ? mtree_range_walk+0x632/0x900 [ 31.731326] ? mas_walk+0x5c7/0x7c0 [ 31.731838] do_vmi_munmap+0x1f1/0x2b0 [ 31.732357] mmap_region+0x1f9/0x2660 [ 31.732871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.733414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.734176] ? __pfx_lock_acquire+0x10/0x10 [ 31.734734] ? __pfx_mmap_region+0x10/0x10 [ 31.735301] ? security_mmap_addr+0x7d/0xa0 [ 31.735859] ? get_unmapped_area+0x1f5/0x3f0 [ 31.736435] do_mmap+0x854/0xf00 [ 31.736903] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.737428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.738031] ksys_mmap_pgoff+0x3af/0x500 [ 31.738561] do_syscall_64+0x3f/0x90 [ 31.739075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.739757] RIP: 0033:0x7f4e3cc65d82 [ 31.740255] 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 [ 31.742492] RSP: 002b:00007ffe849184b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.743441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e3cc65d82 [ 31.744339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e3c09f000 [ 31.745223] RBP: 00007f4e3c09f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.746131] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf2f652d90 [ 31.747031] R13: 00007ffe849184d0 R14: 00007ffe84918500 R15: 00007ffe84918860 [ 31.747930] [ 31.748234] [ 31.748465] Allocated by task 212: [ 31.748917] kasan_save_stack+0x22/0x50 [ 31.749449] kasan_set_track+0x25/0x30 [ 31.749989] __kasan_slab_alloc+0x59/0x70 [ 31.750544] kmem_cache_alloc+0x16b/0x370 [ 31.751093] vm_area_dup+0x20/0x160 [ 31.751574] __split_vma+0x170/0x950 [ 31.752057] split_vma+0xc6/0x110 [ 31.752519] mprotect_fixup+0x8d2/0xb30 [ 31.753051] do_mprotect_pkey+0x87e/0xd40 [ 31.753603] __x64_sys_mprotect+0x78/0xc0 [ 31.754164] do_syscall_64+0x3f/0x90 [ 31.754672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755349] [ 31.755581] Freed by task 212: [ 31.755996] kasan_save_stack+0x22/0x50 [ 31.756540] kasan_set_track+0x25/0x30 [ 31.757059] kasan_save_free_info+0x2b/0x50 [ 31.757633] __kasan_slab_free+0x10a/0x190 [ 31.758205] kmem_cache_free+0x10d/0x4d0 [ 31.758750] rcu_core+0x8c8/0x2860 [ 31.759226] __do_softirq+0x1b7/0x7d4 [ 31.759723] [ 31.759953] Last potentially related work creation: [ 31.760577] kasan_save_stack+0x22/0x50 [ 31.761111] __kasan_record_aux_stack+0x8e/0xa0 [ 31.761745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.762421] remove_vma+0x139/0x170 [ 31.762889] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.763475] do_vmi_munmap+0x1f1/0x2b0 [ 31.763990] __vm_munmap+0x138/0x3a0 [ 31.764486] __x64_sys_munmap+0x59/0x80 [ 31.765013] do_syscall_64+0x3f/0x90 [ 31.765508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.766197] [ 31.766420] The buggy address belongs to the object at ffff88800cb9a9f8 [ 31.766420] which belongs to the cache vm_area_struct of size 168 [ 31.767952] The buggy address is located 88 bytes inside of [ 31.767952] freed 168-byte region [ffff88800cb9a9f8, ffff88800cb9aaa0) [ 31.769423] [ 31.769668] The buggy address belongs to the physical page: [ 31.770363] page:000000003f362343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb9a [ 31.771485] memcg:ffff88800cae7501 [ 31.771946] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.772686] page_type: 0xffffffff() [ 31.773154] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.774144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cae7501 [ 31.775102] page dumped because: kasan: bad access detected [ 31.775815] [ 31.776041] Memory state around the buggy address: [ 31.776649] ffff88800cb9a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.777548] ffff88800cb9a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.778478] >ffff88800cb9aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.779393] ^ [ 31.780131] ffff88800cb9aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.781027] ffff88800cb9ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.781927] ================================================================== [ 31.782964] Disabling lock debugging due to kernel taint [ 33.701385] BUG: Bad rss-counter state mm:00000000b160ccb1 type:MM_FILEPAGES val:33 [ 33.702423] BUG: Bad rss-counter state mm:00000000b160ccb1 type:MM_ANONPAGES val:22 [ 34.181512] BUG: Bad rss-counter state mm:000000005f1c5ba7 type:MM_FILEPAGES val:33 [ 34.182501] BUG: Bad rss-counter state mm:000000005f1c5ba7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13041' (ECDSA) to the list of known hosts. 2023/06/19 13:18:13 fuzzer started 2023/06/19 13:18:13 dialing manager at localhost:44161 2023/06/19 13:18:13 checking machine... 2023/06/19 13:18:13 checking revisions... [ 34.918520] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:18:13 testing simple program... [ 34.969834] cgroup: Unknown subsys name 'net' [ 35.009942] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:12 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=ffff888008c58000 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=00007f26b779c840 CR3=0000000016726000 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=2032313a38313a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a38313a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffff88806cf35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8183a3bd RSP=ffff88800fdd7a10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000200 R13=ffff88800cb75480 R14=0000000000000dc0 R15=ffffffff8186cb26 RIP=ffffffff8135b91f 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 00007f6cdf2f3900 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=00007ffd920b7000 CR3=000000000e7b0000 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=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