syzkaller login: [ 38.662271] BUG: Bad rss-counter state mm:000000001911670e type:MM_FILEPAGES val:33 [ 38.663479] BUG: Bad rss-counter state mm:000000001911670e type:MM_ANONPAGES val:22 [ 38.824824] ================================================================== [ 38.825784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.826711] Read of size 8 at addr ffff88800d8a0140 by task sshd/219 [ 38.827574] [ 38.827797] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.828659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.829667] Call Trace: [ 38.829985] <TASK> [ 38.830272] dump_stack_lvl+0x91/0xf0 [ 38.830763] print_report+0xcc/0x620 [ 38.831239] ? __virt_addr_valid+0x102/0x340 [ 38.831787] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832403] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833016] kasan_report+0xbe/0xf0 [ 38.833499] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.834124] vma_interval_tree_remove+0xc75/0xec0 [ 38.834730] vma_prepare+0xc54/0x11a0 [ 38.835209] __split_vma+0x5af/0x950 [ 38.835677] ? __pfx___split_vma+0x10/0x10 [ 38.836206] ? find_held_lock+0x2c/0x110 [ 38.836733] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.837295] ? lock_is_held_type+0x9f/0x120 [ 38.837845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.838454] ? mtree_range_walk+0x632/0x900 [ 38.839010] ? mas_walk+0x5c7/0x7c0 [ 38.839482] do_vmi_munmap+0x1f1/0x2b0 [ 38.839975] mmap_region+0x1f9/0x2660 [ 38.840457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.840963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.841694] ? __pfx_lock_acquire+0x10/0x10 [ 38.842226] ? __pfx_mmap_region+0x10/0x10 [ 38.842756] ? security_mmap_addr+0x7d/0xa0 [ 38.843280] ? get_unmapped_area+0x1f5/0x3f0 [ 38.843831] do_mmap+0x854/0xf00 [ 38.844273] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.844767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.845326] ksys_mmap_pgoff+0x3af/0x500 [ 38.845858] do_syscall_64+0x3f/0x90 [ 38.846344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.846997] RIP: 0033:0x7faeefd69d82 [ 38.847461] 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 [ 38.849610] RSP: 002b:00007ffe22dc6848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.850522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faeefd69d82 [ 38.851381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faeef1a3000 [ 38.852239] RBP: 00007faeef1a3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.853097] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b8433fd90 [ 38.853971] R13: 00007ffe22dc6860 R14: 00007ffe22dc6890 R15: 00007ffe22dc6bf0 [ 38.854838] </TASK> [ 38.855130] [ 38.855347] Allocated by task 212: [ 38.855781] kasan_save_stack+0x22/0x50 [ 38.856286] kasan_set_track+0x25/0x30 [ 38.856782] __kasan_slab_alloc+0x59/0x70 [ 38.857315] kmem_cache_alloc+0x16b/0x370 [ 38.857846] vm_area_dup+0x20/0x160 [ 38.858304] __split_vma+0x170/0x950 [ 38.858774] split_vma+0xc6/0x110 [ 38.859220] mprotect_fixup+0x8d2/0xb30 [ 38.859732] do_mprotect_pkey+0x87e/0xd40 [ 38.860259] __x64_sys_mprotect+0x78/0xc0 [ 38.860789] do_syscall_64+0x3f/0x90 [ 38.861266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.861933] [ 38.862150] Freed by task 212: [ 38.862543] kasan_save_stack+0x22/0x50 [ 38.863049] kasan_set_track+0x25/0x30 [ 38.863542] kasan_save_free_info+0x2b/0x50 [ 38.864084] __kasan_slab_free+0x10a/0x190 [ 38.864618] kmem_cache_free+0x10d/0x4d0 [ 38.865133] rcu_core+0x8c8/0x2860 [ 38.865586] __do_softirq+0x1b7/0x7d4 [ 38.866069] [ 38.866292] Last potentially related work creation: [ 38.866880] kasan_save_stack+0x22/0x50 [ 38.867396] __kasan_record_aux_stack+0x8e/0xa0 [ 38.867980] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.868631] remove_vma+0x139/0x170 [ 38.869088] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.869665] do_vmi_munmap+0x1f1/0x2b0 [ 38.870156] __vm_munmap+0x138/0x3a0 [ 38.870627] __x64_sys_munmap+0x59/0x80 [ 38.871123] do_syscall_64+0x3f/0x90 [ 38.871599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872247] [ 38.872469] The buggy address belongs to the object at ffff88800d8a00e8 [ 38.872469] which belongs to the cache vm_area_struct of size 168 [ 38.873961] The buggy address is located 88 bytes inside of [ 38.873961] freed 168-byte region [ffff88800d8a00e8, ffff88800d8a0190) [ 38.875381] [ 38.875600] The buggy address belongs to the physical page: [ 38.876264] page:000000006073b2d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8a0 [ 38.877382] memcg:ffff88800dc98d01 [ 38.877829] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.878483] page_type: 0xffffffff() [ 38.878943] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d44c0 0000000000000002 [ 38.879883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc98d01 [ 38.880823] page dumped because: kasan: bad access detected [ 38.881491] [ 38.881714] Memory state around the buggy address: [ 38.882304] ffff88800d8a0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.883172] ffff88800d8a0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.884048] >ffff88800d8a0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.884907] ^ [ 38.885560] ffff88800d8a0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.886435] ffff88800d8a0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.887304] ================================================================== [ 38.888337] Disabling lock debugging due to kernel taint [ 41.523480] BUG: Bad rss-counter state mm:0000000065cb435a type:MM_FILEPAGES val:33 [ 41.524436] BUG: Bad rss-counter state mm:0000000065cb435a type:MM_ANONPAGES val:22 [ 42.015862] BUG: Bad rss-counter state mm:000000007ee312f6 type:MM_FILEPAGES val:33 [ 42.016857] BUG: Bad rss-counter state mm:000000007ee312f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19501' (ECDSA) to the list of known hosts. 2023/06/21 05:15:17 fuzzer started 2023/06/21 05:15:17 dialing manager at localhost:36067 2023/06/21 05:15:17 checking machine... 2023/06/21 05:15:17 checking revisions... [ 42.726268] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:15:17 testing simple program... [ 42.769981] cgroup: Unknown subsys name 'net' [ 42.820487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:15:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc24a2e3b30 CR3=000000000d8e8000 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=13c2a174ace6c6b6ab40bb7d17301839 XMM02=000000000011b768ec2efd57dc4c00df XMM03=0000000000121990e0737d6466d0c337 XMM04=bde5c1db2cf7c16900000000000ae988 XMM05=19e9129bd510f2350000000000131e10 XMM06=b1f00bd437c2c6b900000000001306c0 XMM07=e042d86d42eb936e0000000000121c10 XMM08=e0737d6466d0c337000000000011b7c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000075bbe21d RBX=00000000d1afa91e RCX=000000005e850f33 RDX=000000004053b2ee RSI=ffffffff821777f6 RDI=ffff88800fe1f7fc RBP=ffff88800fe1f7f8 RSP=ffff88800fe1f6f8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000003 R13=00000000f3986716 R14=00000000b05d68fe R15=00000000b05d6818 RIP=ffffffff8217786b RFL=00000206 [-----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 00007f8822827900 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=00007ffcbf8d8000 CR3=000000000d5dc000 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