syzkaller login: [ 30.711905] BUG: Bad rss-counter state mm:00000000c29bffe2 type:MM_FILEPAGES val:33 [ 30.714031] BUG: Bad rss-counter state mm:00000000c29bffe2 type:MM_ANONPAGES val:22 [ 30.850494] ================================================================== [ 30.851278] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.852077] Read of size 8 at addr ffff888009896ed8 by task sshd/221 [ 30.852724] [ 30.852911] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.853643] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.854598] Call Trace: [ 30.854874] [ 30.855123] dump_stack_lvl+0x91/0xf0 [ 30.855575] print_report+0xcc/0x620 [ 30.856012] ? __virt_addr_valid+0x102/0x340 [ 30.856475] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856957] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.857452] kasan_report+0xbe/0xf0 [ 30.857835] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858337] vma_interval_tree_remove+0xc75/0xec0 [ 30.858826] vma_prepare+0xc54/0x11a0 [ 30.859215] __split_vma+0x5af/0x950 [ 30.859568] ? __pfx___split_vma+0x10/0x10 [ 30.859966] ? find_held_lock+0x2c/0x110 [ 30.860370] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.860797] ? lock_is_held_type+0x9f/0x120 [ 30.861282] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.861862] ? mtree_range_walk+0x632/0x900 [ 30.862406] ? mas_walk+0x5c7/0x7c0 [ 30.862794] do_vmi_munmap+0x1f1/0x2b0 [ 30.863167] mmap_region+0x1f9/0x2660 [ 30.863559] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864483] ? __pfx_lock_acquire+0x10/0x10 [ 30.864885] ? __pfx_mmap_region+0x10/0x10 [ 30.865285] ? security_mmap_addr+0x7d/0xa0 [ 30.865695] ? get_unmapped_area+0x1f5/0x3f0 [ 30.866110] do_mmap+0x854/0xf00 [ 30.866460] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.866832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.867256] ksys_mmap_pgoff+0x3af/0x500 [ 30.867650] do_syscall_64+0x3f/0x90 [ 30.868026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.868531] RIP: 0033:0x7f8cd1ed0d82 [ 30.868878] 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 [ 30.870518] RSP: 002b:00007ffc611edd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cd1ed0d82 [ 30.871842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cd130a000 [ 30.872512] RBP: 00007f8cd130a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.873161] R10: 0000000000000812 R11: 0000000000000206 R12: 000056436aabcec0 [ 30.873870] R13: 00007ffc611edd70 R14: 00007ffc611edda0 R15: 00007ffc611ee100 [ 30.874622] [ 30.874862] [ 30.875033] Allocated by task 214: [ 30.875373] kasan_save_stack+0x22/0x50 [ 30.875784] kasan_set_track+0x25/0x30 [ 30.876180] __kasan_slab_alloc+0x59/0x70 [ 30.876598] kmem_cache_alloc+0x16b/0x370 [ 30.877023] vm_area_dup+0x20/0x160 [ 30.877384] __split_vma+0x170/0x950 [ 30.877754] split_vma+0xc6/0x110 [ 30.878083] mprotect_fixup+0x8d2/0xb30 [ 30.878471] do_mprotect_pkey+0x87e/0xd40 [ 30.878879] __x64_sys_mprotect+0x78/0xc0 [ 30.879273] do_syscall_64+0x3f/0x90 [ 30.879638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880158] [ 30.880321] Freed by task 214: [ 30.880630] kasan_save_stack+0x22/0x50 [ 30.881020] kasan_set_track+0x25/0x30 [ 30.881397] kasan_save_free_info+0x2b/0x50 [ 30.881823] __kasan_slab_free+0x10a/0x190 [ 30.882260] kmem_cache_free+0x10d/0x4d0 [ 30.882676] rcu_core+0x8c8/0x2860 [ 30.883027] __do_softirq+0x1b7/0x7d4 [ 30.883398] [ 30.883561] Last potentially related work creation: [ 30.884010] kasan_save_stack+0x22/0x50 [ 30.884399] __kasan_record_aux_stack+0x8e/0xa0 [ 30.884857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.885371] remove_vma+0x139/0x170 [ 30.885725] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.886171] do_vmi_munmap+0x1f1/0x2b0 [ 30.886548] __vm_munmap+0x138/0x3a0 [ 30.886919] __x64_sys_munmap+0x59/0x80 [ 30.887302] do_syscall_64+0x3f/0x90 [ 30.887678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888189] [ 30.888362] The buggy address belongs to the object at ffff888009896e80 [ 30.888362] which belongs to the cache vm_area_struct of size 168 [ 30.889764] The buggy address is located 88 bytes inside of [ 30.889764] freed 168-byte region [ffff888009896e80, ffff888009896f28) [ 30.890952] [ 30.891137] The buggy address belongs to the physical page: [ 30.891662] page:00000000a7c05702 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9896 [ 30.892521] memcg:ffff88800d77f101 [ 30.892863] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.893419] page_type: 0xffffffff() [ 30.893758] raw: 0100000000000200 ffff8880087a0c80 ffffea00003261c0 dead000000000005 [ 30.894499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d77f101 [ 30.895212] page dumped because: kasan: bad access detected [ 30.895711] [ 30.895872] Memory state around the buggy address: [ 30.896324] ffff888009896d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.897008] ffff888009896e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.897698] >ffff888009896e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.898361] ^ [ 30.898911] ffff888009896f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.899564] ffff888009896f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.900201] ================================================================== [ 30.900985] Disabling lock debugging due to kernel taint [ 33.203397] BUG: Bad rss-counter state mm:00000000ae867610 type:MM_FILEPAGES val:33 [ 33.204173] BUG: Bad rss-counter state mm:00000000ae867610 type:MM_ANONPAGES val:22 [ 33.722373] BUG: Bad rss-counter state mm:00000000fcbda64b type:MM_FILEPAGES val:33 [ 33.723571] BUG: Bad rss-counter state mm:00000000fcbda64b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37291' (ECDSA) to the list of known hosts. 2023/06/20 14:47:42 fuzzer started 2023/06/20 14:47:42 dialing manager at localhost:36067 2023/06/20 14:47:42 checking machine... 2023/06/20 14:47:42 checking revisions... [ 34.352784] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:47:42 testing simple program... [ 34.405560] cgroup: Unknown subsys name 'net' [ 34.468483] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:47:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000ffffff9c RCX=ffffffff8185af99 RDX=ffff888009b951c0 RSI=0000000000000000 RDI=0000000000000000 RBP=1ffff110031d3fd1 RSP=ffff888018e9fe80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00007f6b27c8215e R15=0000000000088000 RIP=ffffffff814c0408 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 00007f6b27c8c900 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=00007f6b282440b0 CR3=000000000cf78000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1c6df80a30 CR3=000000000c9c0000 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=d1caad20689531b63442c4fc8aed7dc7 XMM02=2c67c8bc2e329bc3000000000011cdc0 XMM03=fb795ef6d65770560000000000121488 XMM04=587b4275814e89cb00000000000ae988 XMM05=f86c62710086b9180000000000132158 XMM06=c291bd5c70af25b900000000001311f8 XMM07=e042d86d42eb936e0000000000121708 XMM08=754b980e12339e0c000000000011ce20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000