syzkaller login: [ 38.715394] BUG: Bad rss-counter state mm:000000008598af96 type:MM_FILEPAGES val:33 [ 38.716414] BUG: Bad rss-counter state mm:000000008598af96 type:MM_ANONPAGES val:22 [ 38.882422] ================================================================== [ 38.883515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.884692] Read of size 8 at addr ffff888018dc25c8 by task sshd/219 [ 38.885652] [ 38.885897] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.886813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.887857] Call Trace: [ 38.888200] [ 38.888500] dump_stack_lvl+0x91/0xf0 [ 38.889019] print_report+0xcc/0x620 [ 38.889531] ? __virt_addr_valid+0x102/0x340 [ 38.890125] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890779] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891452] kasan_report+0xbe/0xf0 [ 38.891982] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892665] vma_interval_tree_remove+0xc75/0xec0 [ 38.893331] vma_prepare+0xc54/0x11a0 [ 38.893856] __split_vma+0x5af/0x950 [ 38.894405] ? __pfx___split_vma+0x10/0x10 [ 38.894990] ? find_held_lock+0x2c/0x110 [ 38.895565] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.896196] ? lock_is_held_type+0x9f/0x120 [ 38.896787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.897477] ? mtree_range_walk+0x632/0x900 [ 38.898094] ? mas_walk+0x5c7/0x7c0 [ 38.898613] do_vmi_munmap+0x1f1/0x2b0 [ 38.899156] mmap_region+0x1f9/0x2660 [ 38.899691] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.900246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.901026] ? __pfx_lock_acquire+0x10/0x10 [ 38.901609] ? __pfx_mmap_region+0x10/0x10 [ 38.902203] ? security_mmap_addr+0x7d/0xa0 [ 38.902787] ? get_unmapped_area+0x1f5/0x3f0 [ 38.903385] do_mmap+0x854/0xf00 [ 38.903866] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.904405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905021] ksys_mmap_pgoff+0x3af/0x500 [ 38.905574] do_syscall_64+0x3f/0x90 [ 38.906122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906831] RIP: 0033:0x7f7b9990ed82 [ 38.907334] 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 [ 38.909685] RSP: 002b:00007ffce49c9188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.910694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b9990ed82 [ 38.911624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b98d48000 [ 38.912568] RBP: 00007f7b98d48000 R08: 0000000000000009 R09: 0000000000001000 [ 38.913509] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b9c8d9ec0 [ 38.914453] R13: 00007ffce49c91a0 R14: 00007ffce49c91d0 R15: 00007ffce49c9530 [ 38.915412] [ 38.915736] [ 38.915968] Allocated by task 212: [ 38.916435] kasan_save_stack+0x22/0x50 [ 38.916996] kasan_set_track+0x25/0x30 [ 38.917537] __kasan_slab_alloc+0x59/0x70 [ 38.918142] kmem_cache_alloc+0x16b/0x370 [ 38.918717] vm_area_dup+0x20/0x160 [ 38.919214] __split_vma+0x170/0x950 [ 38.919731] split_vma+0xc6/0x110 [ 38.920216] mprotect_fixup+0x8d2/0xb30 [ 38.920766] do_mprotect_pkey+0x87e/0xd40 [ 38.921341] __x64_sys_mprotect+0x78/0xc0 [ 38.921923] do_syscall_64+0x3f/0x90 [ 38.922448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923149] [ 38.923383] Freed by task 212: [ 38.923817] kasan_save_stack+0x22/0x50 [ 38.924367] kasan_set_track+0x25/0x30 [ 38.924905] kasan_save_free_info+0x2b/0x50 [ 38.925487] __kasan_slab_free+0x10a/0x190 [ 38.926075] kmem_cache_free+0x10d/0x4d0 [ 38.926638] rcu_core+0x8c8/0x2860 [ 38.927120] __do_softirq+0x1b7/0x7d4 [ 38.927652] [ 38.927892] Last potentially related work creation: [ 38.928541] kasan_save_stack+0x22/0x50 [ 38.929094] __kasan_record_aux_stack+0x8e/0xa0 [ 38.929720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930439] remove_vma+0x139/0x170 [ 38.930934] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931547] do_vmi_munmap+0x1f1/0x2b0 [ 38.932083] __vm_munmap+0x138/0x3a0 [ 38.932596] __x64_sys_munmap+0x59/0x80 [ 38.933138] do_syscall_64+0x3f/0x90 [ 38.933654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934372] [ 38.934606] The buggy address belongs to the object at ffff888018dc2570 [ 38.934606] which belongs to the cache vm_area_struct of size 168 [ 38.936235] The buggy address is located 88 bytes inside of [ 38.936235] freed 168-byte region [ffff888018dc2570, ffff888018dc2618) [ 38.937785] [ 38.938043] The buggy address belongs to the physical page: [ 38.938770] page:00000000a9aee55c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dc2 [ 38.939969] memcg:ffff88800f157601 [ 38.940435] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941152] page_type: 0xffffffff() [ 38.941644] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8780 dead000000000004 [ 38.942667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f157601 [ 38.943670] page dumped because: kasan: bad access detected [ 38.944395] [ 38.944630] Memory state around the buggy address: [ 38.945264] ffff888018dc2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.946217] ffff888018dc2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.947158] >ffff888018dc2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.948101] ^ [ 38.948845] ffff888018dc2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.949788] ffff888018dc2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.950751] ================================================================== [ 38.951869] Disabling lock debugging due to kernel taint [ 41.190546] BUG: Bad rss-counter state mm:0000000019457019 type:MM_FILEPAGES val:33 [ 41.191732] BUG: Bad rss-counter state mm:0000000019457019 type:MM_ANONPAGES val:22 [ 41.613922] BUG: Bad rss-counter state mm:00000000ffdb6a47 type:MM_FILEPAGES val:33 [ 41.615311] BUG: Bad rss-counter state mm:00000000ffdb6a47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39305' (ECDSA) to the list of known hosts. 2023/06/20 12:51:46 fuzzer started 2023/06/20 12:51:46 dialing manager at localhost:36067 2023/06/20 12:51:46 checking machine... 2023/06/20 12:51:46 checking revisions... [ 42.308698] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:51:47 testing simple program... [ 42.360035] cgroup: Unknown subsys name 'net' [ 42.406037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:51:46 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff8880094b8000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff8880090bf318 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000026173 R12=00000000000101f7 R13=ffffed1001297001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-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 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=00007f39b4222760 CR3=000000000ccda000 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=77bad3380bed6189824ad9b71ccd1fb8 XMM02=eff9b2d0a8fce9cb000000000011ddf8 XMM03=2c67c8bc2e329bc3000000000011df20 XMM04=e27b56df971f109c00000000000ae988 XMM05=03f103f122967b5c0000000000134370 XMM06=19e9129bd510f2350000000000133168 XMM07=fb795ef6d65770560000000000123660 XMM08=2c67c8bc2e329bc3000000000011df20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888008d7f9c8 RSP=ffff888008d7f958 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000080100008 R12=ffffea000074bc80 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c03a0 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 0000000000000000 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=000055a140100218 CR3=000000001a380000 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=1d0001126c00011272000000420a3001 XMM02=000112c1000000420a3001000013fe18 XMM03=0a30010000121818000112f7000112fb XMM04=280000006f0a300100002a6718000033 XMM05=5f1a5401000000820a30010032615f1a XMM06=0000006f0a30010034615f1a000113e4 XMM07=000113950001139b000000820a300100 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000