syzkaller login: [ 30.900450] BUG: Bad rss-counter state mm:00000000f01bd9f4 type:MM_FILEPAGES val:33 [ 30.901133] BUG: Bad rss-counter state mm:00000000f01bd9f4 type:MM_ANONPAGES val:22 [ 31.082952] ================================================================== [ 31.083811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.084476] Read of size 8 at addr ffff88800e57a798 by task sshd/218 [ 31.085001] [ 31.085152] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.085760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.086442] Call Trace: [ 31.086686] [ 31.086895] dump_stack_lvl+0x91/0xf0 [ 31.087250] print_report+0xcc/0x620 [ 31.087603] ? __virt_addr_valid+0x102/0x340 [ 31.088031] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088921] kasan_report+0xbe/0xf0 [ 31.089262] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089792] vma_interval_tree_remove+0xc75/0xec0 [ 31.090307] vma_prepare+0xc54/0x11a0 [ 31.090715] __split_vma+0x5af/0x950 [ 31.091116] ? __pfx___split_vma+0x10/0x10 [ 31.091565] ? find_held_lock+0x2c/0x110 [ 31.091969] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.092369] ? lock_is_held_type+0x9f/0x120 [ 31.092749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.093187] ? mtree_range_walk+0x632/0x900 [ 31.093580] ? mas_walk+0x5c7/0x7c0 [ 31.093924] do_vmi_munmap+0x1f1/0x2b0 [ 31.094279] mmap_region+0x1f9/0x2660 [ 31.094628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.094998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.095499] ? __pfx_lock_acquire+0x10/0x10 [ 31.095922] ? __pfx_mmap_region+0x10/0x10 [ 31.096307] ? security_mmap_addr+0x7d/0xa0 [ 31.096682] ? get_unmapped_area+0x1f5/0x3f0 [ 31.097077] do_mmap+0x854/0xf00 [ 31.097399] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.097754] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.098144] ksys_mmap_pgoff+0x3af/0x500 [ 31.098487] do_syscall_64+0x3f/0x90 [ 31.098790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.099202] RIP: 0033:0x7f5065130d82 [ 31.099516] 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 [ 31.101092] RSP: 002b:00007fffaa47a998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.101702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5065130d82 [ 31.102246] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f506456a000 [ 31.102816] RBP: 00007f506456a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.103354] R10: 0000000000000812 R11: 0000000000000206 R12: 000056542e597d90 [ 31.103926] R13: 00007fffaa47a9b0 R14: 00007fffaa47a9e0 R15: 00007fffaa47ad40 [ 31.104582] [ 31.104801] [ 31.104964] Allocated by task 211: [ 31.105289] kasan_save_stack+0x22/0x50 [ 31.105786] kasan_set_track+0x25/0x30 [ 31.106163] __kasan_slab_alloc+0x59/0x70 [ 31.106560] kmem_cache_alloc+0x16b/0x370 [ 31.106927] vm_area_dup+0x20/0x160 [ 31.107273] __split_vma+0x170/0x950 [ 31.107628] split_vma+0xc6/0x110 [ 31.107941] mprotect_fixup+0x8d2/0xb30 [ 31.108263] do_mprotect_pkey+0x87e/0xd40 [ 31.108638] __x64_sys_mprotect+0x78/0xc0 [ 31.108992] do_syscall_64+0x3f/0x90 [ 31.109313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109742] [ 31.109889] Freed by task 211: [ 31.110152] kasan_save_stack+0x22/0x50 [ 31.110491] kasan_set_track+0x25/0x30 [ 31.110823] kasan_save_free_info+0x2b/0x50 [ 31.111182] __kasan_slab_free+0x10a/0x190 [ 31.111539] kmem_cache_free+0x10d/0x4d0 [ 31.111915] rcu_core+0x8c8/0x2860 [ 31.112211] __do_softirq+0x1b7/0x7d4 [ 31.112529] [ 31.112677] Last potentially related work creation: [ 31.113066] kasan_save_stack+0x22/0x50 [ 31.113404] __kasan_record_aux_stack+0x8e/0xa0 [ 31.113788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.114217] remove_vma+0x139/0x170 [ 31.114509] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.114872] do_vmi_munmap+0x1f1/0x2b0 [ 31.123953] __vm_munmap+0x138/0x3a0 [ 31.124283] __x64_sys_munmap+0x59/0x80 [ 31.124623] do_syscall_64+0x3f/0x90 [ 31.124950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.125387] [ 31.125540] The buggy address belongs to the object at ffff88800e57a740 [ 31.125540] which belongs to the cache vm_area_struct of size 168 [ 31.126525] The buggy address is located 88 bytes inside of [ 31.126525] freed 168-byte region [ffff88800e57a740, ffff88800e57a7e8) [ 31.127467] [ 31.127618] The buggy address belongs to the physical page: [ 31.128097] page:0000000017aa91be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe57a [ 31.128825] memcg:ffff88801b833c01 [ 31.129114] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.129548] page_type: 0xffffffff() [ 31.129857] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.130466] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b833c01 [ 31.131059] page dumped because: kasan: bad access detected [ 31.131505] [ 31.131655] Memory state around the buggy address: [ 31.132085] ffff88800e57a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.132666] ffff88800e57a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.133236] >ffff88800e57a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.133805] ^ [ 31.134137] ffff88800e57a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.134721] ffff88800e57a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.135295] ================================================================== [ 31.136106] Disabling lock debugging due to kernel taint [ 35.225413] BUG: Bad rss-counter state mm:00000000c9614e2d type:MM_FILEPAGES val:33 [ 35.226691] BUG: Bad rss-counter state mm:00000000c9614e2d type:MM_ANONPAGES val:22 [ 37.239844] BUG: Bad rss-counter state mm:00000000a252084d type:MM_FILEPAGES val:33 [ 37.240473] BUG: Bad rss-counter state mm:00000000a252084d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18977' (ECDSA) to the list of known hosts. 2023/06/21 08:08:38 fuzzer started 2023/06/21 08:08:38 dialing manager at localhost:36067 2023/06/21 08:08:38 checking machine... 2023/06/21 08:08:38 checking revisions... [ 38.119931] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:08:38 testing simple program... [ 38.178580] cgroup: Unknown subsys name 'net' [ 38.301198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:08:38 Registers: info registers vcpu 0 RAX=ffff888018fc4060 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888017aa0000 RSI=ffffffff817692af RDI=ffff888019dd43d8 RBP=ffff888019dd4330 RSP=ffff8880158b7888 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800dea4f10 R13=ffff88800dea4f00 R14=ffff888019dd4330 R15=ffff88800d45ce90 RIP=ffffffff817692c8 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 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=00007f1780fab790 CR3=0000000009af8000 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=0000000000000018fffffffe7ffbfeff XMM01=ce624afd6bb72bb5000055f000000030 XMM02=000000000000000231e367ed0004da45 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=49c5f0b4fb9ab4130000000000000000 XMM07=d6270063d859b9dfbc76bbe82b88e94a XMM08=2520737365726464616e657473696c00 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=ffff888008c04400 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=00007f55f20cc328 CR3=0000000005482000 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