syzkaller login: [ 57.259792] BUG: Bad rss-counter state mm:00000000bf56a16e type:MM_FILEPAGES val:33 [ 57.261031] BUG: Bad rss-counter state mm:00000000bf56a16e type:MM_ANONPAGES val:22 [ 57.300717] ================================================================== [ 57.301609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.302521] Read of size 8 at addr ffff888015869228 by task sshd/228 [ 57.303241] [ 57.303447] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.304248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.305165] Call Trace: [ 57.305463] [ 57.305733] dump_stack_lvl+0x91/0xf0 [ 57.306197] print_report+0xcc/0x620 [ 57.306665] ? __virt_addr_valid+0x102/0x340 [ 57.307186] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.307771] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.308357] kasan_report+0xbe/0xf0 [ 57.308805] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.309391] vma_interval_tree_remove+0xc75/0xec0 [ 57.309962] vma_prepare+0xc54/0x11a0 [ 57.310448] __split_vma+0x5af/0x950 [ 57.310900] ? __pfx___split_vma+0x10/0x10 [ 57.311419] ? find_held_lock+0x2c/0x110 [ 57.311943] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.312500] ? lock_is_held_type+0x9f/0x120 [ 57.313038] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.313635] ? mtree_range_walk+0x632/0x900 [ 57.314184] ? mas_walk+0x5c7/0x7c0 [ 57.314660] do_vmi_munmap+0x1f1/0x2b0 [ 57.315146] mmap_region+0x1f9/0x2660 [ 57.315621] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.316120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.316831] ? __pfx_lock_acquire+0x10/0x10 [ 57.317361] ? __pfx_mmap_region+0x10/0x10 [ 57.317891] ? security_mmap_addr+0x7d/0xa0 [ 57.318455] ? get_unmapped_area+0x1f5/0x3f0 [ 57.319012] do_mmap+0x854/0xf00 [ 57.319448] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.319948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.320523] ksys_mmap_pgoff+0x3af/0x500 [ 57.321037] do_syscall_64+0x3f/0x90 [ 57.321518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.322172] RIP: 0033:0x7fd3f6801d82 [ 57.322648] 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 [ 57.324809] RSP: 002b:00007ffcedee1a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.325726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3f6801d82 [ 57.326591] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3f5c3b000 [ 57.327443] RBP: 00007fd3f5c3b000 R08: 0000000000000009 R09: 0000000000001000 [ 57.328439] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b16c952ec0 [ 57.329294] R13: 00007ffcedee1a30 R14: 00007ffcedee1a60 R15: 00007ffcedee1dc0 [ 57.330191] [ 57.330511] [ 57.330730] Allocated by task 221: [ 57.331176] kasan_save_stack+0x22/0x50 [ 57.331681] kasan_set_track+0x25/0x30 [ 57.332182] __kasan_slab_alloc+0x59/0x70 [ 57.332711] kmem_cache_alloc+0x16b/0x370 [ 57.333227] vm_area_dup+0x20/0x160 [ 57.333684] __split_vma+0x170/0x950 [ 57.334150] split_vma+0xc6/0x110 [ 57.334602] mprotect_fixup+0x8d2/0xb30 [ 57.335109] do_mprotect_pkey+0x87e/0xd40 [ 57.335638] __x64_sys_mprotect+0x78/0xc0 [ 57.336166] do_syscall_64+0x3f/0x90 [ 57.336636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.337289] [ 57.337503] Freed by task 221: [ 57.337897] kasan_save_stack+0x22/0x50 [ 57.338410] kasan_set_track+0x25/0x30 [ 57.338903] kasan_save_free_info+0x2b/0x50 [ 57.339442] __kasan_slab_free+0x10a/0x190 [ 57.339980] kmem_cache_free+0x10d/0x4d0 [ 57.340491] rcu_core+0x8c8/0x2860 [ 57.340945] __do_softirq+0x1b7/0x7d4 [ 57.341423] [ 57.341638] Last potentially related work creation: [ 57.342238] kasan_save_stack+0x22/0x50 [ 57.342749] __kasan_record_aux_stack+0x8e/0xa0 [ 57.343330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.343971] remove_vma+0x139/0x170 [ 57.344424] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.344982] do_vmi_munmap+0x1f1/0x2b0 [ 57.345474] __vm_munmap+0x138/0x3a0 [ 57.345946] __x64_sys_munmap+0x59/0x80 [ 57.346458] do_syscall_64+0x3f/0x90 [ 57.346935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.347581] [ 57.347799] The buggy address belongs to the object at ffff8880158691d0 [ 57.347799] which belongs to the cache vm_area_struct of size 168 [ 57.349262] The buggy address is located 88 bytes inside of [ 57.349262] freed 168-byte region [ffff8880158691d0, ffff888015869278) [ 57.350689] [ 57.350907] The buggy address belongs to the physical page: [ 57.351573] page:000000006cc18453 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15869 [ 57.352660] memcg:ffff888016c2aa01 [ 57.353087] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.353743] page_type: 0xffffffff() [ 57.354200] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.355140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c2aa01 [ 57.356046] page dumped because: kasan: bad access detected [ 57.356703] [ 57.356922] Memory state around the buggy address: [ 57.357500] ffff888015869100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.358362] ffff888015869180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 57.359213] >ffff888015869200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 57.360068] ^ [ 57.360626] ffff888015869280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.361477] ffff888015869300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.362345] ================================================================== [ 57.363405] Disabling lock debugging due to kernel taint [ 59.019145] BUG: Bad rss-counter state mm:000000008217f345 type:MM_FILEPAGES val:33 [ 59.020234] BUG: Bad rss-counter state mm:000000008217f345 type:MM_ANONPAGES val:22 [ 59.454743] BUG: Bad rss-counter state mm:000000001a52ec06 type:MM_FILEPAGES val:33 [ 59.455764] BUG: Bad rss-counter state mm:000000001a52ec06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40393' (ECDSA) to the list of known hosts. 2023/06/20 02:39:55 fuzzer started 2023/06/20 02:39:56 dialing manager at localhost:44161 2023/06/20 02:39:56 checking machine... 2023/06/20 02:39:56 checking revisions... [ 60.252925] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:39:56 testing simple program... [ 60.306407] cgroup: Unknown subsys name 'net' [ 60.367106] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:39:37 Registers: info registers vcpu 0 RAX=ffffea0000405fc0 RBX=ffff88801017f390 RCX=ffff88800844f780 RDX=ffff88809017f390 RSI=ffff88800ecc6260 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888016dbfc78 R8 =ffff88801017f390 R9 =0000000000000000 R10=ffffea00003b3180 R11=00000000800d000a R12=dffffc0000000000 R13=ffff888016dbfcb8 R14=0000000000000000 R15=ffff88800ecc6260 RIP=ffffffff81810213 RFL=00000286 [--S--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 00007f622c70b900 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=00007f622bb8f610 CR3=000000000cb68000 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=1f57583c891b9ed500000000000ae988 XMM05=fa8c66f8f8d4ba910000000000135760 XMM06=9e0cbb72d41eac710000000000134190 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=0000000000000001 RCX=ffffffff844984a5 RDX=0000000000000012 RSI=ffffffff864a8734 RDI=ffffffff860480c4 RBP=ffffffff860480c4 RSP=ffff88801c8fee60 R8 =ffffffff864a8734 R9 =ffff88801c8fef58 R10=0000000000038001 R11=00000000000b3b3c R12=ffffffff8604810c R13=ffffffff860480c4 R14=ffffffff860480c4 R15=dffffc0000000000 RIP=ffffffff8112fc6e 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 00007ff138432900 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=00007ff1383fc008 CR3=000000000fade000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000