syzkaller login: [ 30.429573] BUG: Bad rss-counter state mm:000000009d706f25 type:MM_FILEPAGES val:33 [ 30.430576] BUG: Bad rss-counter state mm:000000009d706f25 type:MM_ANONPAGES val:22 [ 30.557983] ================================================================== [ 30.558675] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.559380] Read of size 8 at addr ffff88800c6565c8 by task sshd/220 [ 30.559956] [ 30.560118] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.560761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.561468] Call Trace: [ 30.561693] [ 30.562025] dump_stack_lvl+0x91/0xf0 [ 30.562392] print_report+0xcc/0x620 [ 30.562730] ? __virt_addr_valid+0x102/0x340 [ 30.563123] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.563531] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.563934] kasan_report+0xbe/0xf0 [ 30.564314] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.564753] vma_interval_tree_remove+0xc75/0xec0 [ 30.565239] vma_prepare+0xc54/0x11a0 [ 30.565589] __split_vma+0x5af/0x950 [ 30.565942] ? __pfx___split_vma+0x10/0x10 [ 30.566323] ? find_held_lock+0x2c/0x110 [ 30.566672] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.567076] ? lock_is_held_type+0x9f/0x120 [ 30.567454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.567875] ? mtree_range_walk+0x632/0x900 [ 30.568307] ? mas_walk+0x5c7/0x7c0 [ 30.568638] do_vmi_munmap+0x1f1/0x2b0 [ 30.568962] mmap_region+0x1f9/0x2660 [ 30.569328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.569654] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.570117] ? __pfx_lock_acquire+0x10/0x10 [ 30.570470] ? __pfx_mmap_region+0x10/0x10 [ 30.570811] ? security_mmap_addr+0x7d/0xa0 [ 30.571167] ? get_unmapped_area+0x1f5/0x3f0 [ 30.571525] do_mmap+0x854/0xf00 [ 30.571806] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.572133] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.572508] ksys_mmap_pgoff+0x3af/0x500 [ 30.572842] do_syscall_64+0x3f/0x90 [ 30.573184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.573604] RIP: 0033:0x7fe2aca45d82 [ 30.573907] 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 [ 30.575367] RSP: 002b:00007ffc809e4618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.575976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2aca45d82 [ 30.576589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2abe7f000 [ 30.577177] RBP: 00007fe2abe7f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.577743] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584b0f44f60 [ 30.578330] R13: 00007ffc809e4630 R14: 00007ffc809e4660 R15: 00007ffc809e49c0 [ 30.578901] [ 30.579106] [ 30.579284] Allocated by task 213: [ 30.579558] kasan_save_stack+0x22/0x50 [ 30.579904] kasan_set_track+0x25/0x30 [ 30.580230] __kasan_slab_alloc+0x59/0x70 [ 30.580558] kmem_cache_alloc+0x16b/0x370 [ 30.580892] vm_area_dup+0x20/0x160 [ 30.581228] __split_vma+0x170/0x950 [ 30.581531] split_vma+0xc6/0x110 [ 30.581821] mprotect_fixup+0x8d2/0xb30 [ 30.582177] do_mprotect_pkey+0x87e/0xd40 [ 30.582519] __x64_sys_mprotect+0x78/0xc0 [ 30.582866] do_syscall_64+0x3f/0x90 [ 30.583205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.583640] [ 30.583780] Freed by task 213: [ 30.584038] kasan_save_stack+0x22/0x50 [ 30.584367] kasan_set_track+0x25/0x30 [ 30.584681] kasan_save_free_info+0x2b/0x50 [ 30.585045] __kasan_slab_free+0x10a/0x190 [ 30.585441] kmem_cache_free+0x10d/0x4d0 [ 30.585763] rcu_core+0x8c8/0x2860 [ 30.586056] __do_softirq+0x1b7/0x7d4 [ 30.586406] [ 30.586546] Last potentially related work creation: [ 30.586928] kasan_save_stack+0x22/0x50 [ 30.587250] __kasan_record_aux_stack+0x8e/0xa0 [ 30.587618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.588038] remove_vma+0x139/0x170 [ 30.588330] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.588694] do_vmi_munmap+0x1f1/0x2b0 [ 30.589014] __vm_munmap+0x138/0x3a0 [ 30.589391] __x64_sys_munmap+0x59/0x80 [ 30.589711] do_syscall_64+0x3f/0x90 [ 30.590019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.590478] [ 30.590620] The buggy address belongs to the object at ffff88800c656570 [ 30.590620] which belongs to the cache vm_area_struct of size 168 [ 30.591570] The buggy address is located 88 bytes inside of [ 30.591570] freed 168-byte region [ffff88800c656570, ffff88800c656618) [ 30.592515] [ 30.592659] The buggy address belongs to the physical page: [ 30.593126] page:00000000d46e8ec5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc656 [ 30.593869] memcg:ffff888016a2dc01 [ 30.594152] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.594615] page_type: 0xffffffff() [ 30.594912] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.595520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a2dc01 [ 30.596150] page dumped because: kasan: bad access detected [ 30.596581] [ 30.596719] Memory state around the buggy address: [ 30.597164] ffff88800c656480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.597760] ffff88800c656500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.598326] >ffff88800c656580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.598880] ^ [ 30.599332] ffff88800c656600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.599911] ffff88800c656680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.600470] ================================================================== [ 30.601194] Disabling lock debugging due to kernel taint [ 31.998781] BUG: Bad rss-counter state mm:0000000046971966 type:MM_FILEPAGES val:33 [ 31.999493] BUG: Bad rss-counter state mm:0000000046971966 type:MM_ANONPAGES val:22 [ 32.362007] BUG: Bad rss-counter state mm:000000006b0b343f type:MM_FILEPAGES val:33 [ 32.362660] BUG: Bad rss-counter state mm:000000006b0b343f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49121' (ECDSA) to the list of known hosts. 2023/06/20 09:50:53 fuzzer started 2023/06/20 09:50:53 dialing manager at localhost:44161 2023/06/20 09:50:53 checking machine... 2023/06/20 09:50:53 checking revisions... [ 32.951119] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:50:53 testing simple program... [ 32.994147] cgroup: Unknown subsys name 'net' [ 33.047523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed1000d17ee8 RCX=0000000000000000 RDX=ffff88800d7451c0 RSI=ffff8880068bf760 RDI=ffffffff813ad420 RBP=ffff8880068bf730 RSP=ffff8880068bf728 R8 =ffff88800ea84320 R9 =0000000000000004 R10=ffffed1001d50864 R11=ffffffff81806df1 R12=0000000000000dc0 R13=0000000000000dc0 R14=ffff88800d7451c0 R15=0000000000000dc0 RIP=ffffffff810bcfdd RFL=00000246 [---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 00007f4425827900 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=00007f4424c58220 CR3=000000000d6d4000 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=7994b3c82bb5ffc000000000000ae988 XMM05=bf2e524b889b6b3e0000000000135218 XMM06=4fda316b135da52b0000000000134008 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110030ffed3 RSI=ffffffff8186bab8 RDI=ffff8880187ff698 RBP=ffff8880187ff730 RSP=ffff8880187ff628 R8 =0000000000000001 R9 =ffff8880187ff6d8 R10=0000000000038001 R11=0000000000038dc4 R12=ffff8880187ff760 R13=0000000000000000 R14=ffff888016793680 R15=ffff8880187ff698 RIP=ffffffff8113061d RFL=00000202 [-------] 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 00007f9e101af900 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=00007fff09181000 CR3=000000000e9ee000 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