syzkaller login: [ 43.404788] BUG: Bad rss-counter state mm:000000005af990cf type:MM_FILEPAGES val:33 [ 43.406756] BUG: Bad rss-counter state mm:000000005af990cf type:MM_ANONPAGES val:22 [ 43.596478] ================================================================== [ 43.597077] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.597719] Read of size 8 at addr ffff888019f9f058 by task sshd/232 [ 43.601801] [ 43.606338] CPU: 0 PID: 232 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 43.606901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.607526] Call Trace: [ 43.607793] [ 43.607988] dump_stack_lvl+0x91/0xf0 [ 43.608317] print_report+0xcc/0x620 [ 43.608636] ? __virt_addr_valid+0x102/0x340 [ 43.609006] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.609422] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.611915] kasan_report+0xbe/0xf0 [ 43.612241] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.612651] vma_interval_tree_remove+0xc75/0xec0 [ 43.613057] vma_prepare+0xc54/0x11a0 [ 43.613377] __split_vma+0x5af/0x950 [ 43.613708] ? __pfx___split_vma+0x10/0x10 [ 43.614058] ? find_held_lock+0x2c/0x110 [ 43.614409] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.614791] ? lock_is_held_type+0x9f/0x120 [ 43.615156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.615561] ? mtree_range_walk+0x632/0x900 [ 43.615932] ? mas_walk+0x5c7/0x7c0 [ 43.616258] do_vmi_munmap+0x1f1/0x2b0 [ 43.616591] mmap_region+0x1f9/0x2660 [ 43.616917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.617263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.617754] ? __pfx_lock_acquire+0x10/0x10 [ 43.618113] ? __pfx_mmap_region+0x10/0x10 [ 43.618469] ? security_mmap_addr+0x7d/0xa0 [ 43.618824] ? get_unmapped_area+0x1f5/0x3f0 [ 43.619191] do_mmap+0x854/0xf00 [ 43.619488] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.619821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.620198] ksys_mmap_pgoff+0x3af/0x500 [ 43.620539] do_syscall_64+0x3f/0x90 [ 43.620864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.621299] RIP: 0033:0x7f198025dd82 [ 43.629553] 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 [ 43.630922] RSP: 002b:00007ffe5d7561a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.631516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f198025dd82 [ 43.632065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f197f697000 [ 43.632617] RBP: 00007f197f697000 R08: 0000000000000009 R09: 0000000000001000 [ 43.633177] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b427a19f70 [ 43.638356] R13: 00007ffe5d7561c0 R14: 00007ffe5d7561f0 R15: 00007ffe5d756550 [ 43.638922] [ 43.639162] [ 43.639310] Allocated by task 222: [ 43.639592] kasan_save_stack+0x22/0x50 [ 43.639931] kasan_set_track+0x25/0x30 [ 43.640287] __kasan_slab_alloc+0x59/0x70 [ 43.640629] kmem_cache_alloc+0x16b/0x370 [ 43.640968] vm_area_dup+0x20/0x160 [ 43.641266] __split_vma+0x170/0x950 [ 43.641606] split_vma+0xc6/0x110 [ 43.645846] mprotect_fixup+0x8d2/0xb30 [ 43.646191] do_mprotect_pkey+0x87e/0xd40 [ 43.646532] __x64_sys_mprotect+0x78/0xc0 [ 43.646871] do_syscall_64+0x3f/0x90 [ 43.647213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.647629] [ 43.647773] Freed by task 213: [ 43.648030] kasan_save_stack+0x22/0x50 [ 43.648362] kasan_set_track+0x25/0x30 [ 43.648687] kasan_save_free_info+0x2b/0x50 [ 43.649053] __kasan_slab_free+0x10a/0x190 [ 43.649431] kmem_cache_free+0x10d/0x4d0 [ 43.649787] rcu_core+0x8c8/0x2860 [ 43.650108] __do_softirq+0x1b7/0x7d4 [ 43.650421] [ 43.650564] Last potentially related work creation: [ 43.650942] kasan_save_stack+0x22/0x50 [ 43.651267] __kasan_record_aux_stack+0x8e/0xa0 [ 43.651636] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.652074] remove_vma+0x139/0x170 [ 43.652395] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.652759] do_vmi_munmap+0x1f1/0x2b0 [ 43.653110] __vm_munmap+0x138/0x3a0 [ 43.653415] __x64_sys_munmap+0x59/0x80 [ 43.661806] do_syscall_64+0x3f/0x90 [ 43.662131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.662554] [ 43.662699] The buggy address belongs to the object at ffff888019f9f000 [ 43.662699] which belongs to the cache vm_area_struct of size 168 [ 43.663643] The buggy address is located 88 bytes inside of [ 43.663643] freed 168-byte region [ffff888019f9f000, ffff888019f9f0a8) [ 43.664595] [ 43.664739] The buggy address belongs to the physical page: [ 43.665174] page:00000000ca320241 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f9f [ 43.665890] memcg:ffff8880102aeb01 [ 43.666169] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.666567] page_type: 0xffffffff() [ 43.666843] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 43.667408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102aeb01 [ 43.667985] page dumped because: kasan: bad access detected [ 43.668419] [ 43.668561] Memory state around the buggy address: [ 43.668940] ffff888019f9ef00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 43.669502] ffff888019f9ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.670109] >ffff888019f9f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.670660] ^ [ 43.671138] ffff888019f9f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 43.671695] ffff888019f9f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.672248] ================================================================== [ 43.673019] Disabling lock debugging due to kernel taint [ 46.309690] BUG: Bad rss-counter state mm:00000000d42382eb type:MM_FILEPAGES val:33 [ 46.310438] BUG: Bad rss-counter state mm:00000000d42382eb type:MM_ANONPAGES val:22 [ 47.420851] BUG: Bad rss-counter state mm:000000007cd1977d type:MM_FILEPAGES val:33 [ 47.421716] BUG: Bad rss-counter state mm:000000007cd1977d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43468' (ECDSA) to the list of known hosts. 2023/06/21 10:10:27 fuzzer started 2023/06/21 10:10:28 dialing manager at localhost:36067 2023/06/21 10:10:28 checking machine... 2023/06/21 10:10:28 checking revisions... 2023/06/21 10:10:28 testing simple program... [ 48.187957] kmemleak: Automatic memory scanning thread ended [ 48.231420] cgroup: Unknown subsys name 'net' [ 48.338699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:28 Registers: info registers vcpu 0 RAX=1ffffd4000040119 RBX=ffffea00002008c0 RCX=0000000000000000 RDX=ffff88800f201b40 RSI=ffffffff8170babd RDI=ffff8880169e7d10 RBP=0000000000000001 RSP=ffff8880169e7948 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=8000000008023025 R13=00007faa0a426000 R14=ffff88800cb45128 R15=dffffc0000000000 RIP=ffffffff8170bad5 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=00007faa0a3ea328 CR3=0000000018c42000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888018c8f770 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11003191eef RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007f6fae9b7900 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=00007f6faede7790 CR3=00000000164ba000 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=0000000000000018fffffffe7ffbfeff XMM01=00000000000000020000564a00000030 XMM02=00000000000000008000000000000006 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=c964c7ce8f2d4ef80000000000000000 XMM06=f134aa97d31070376742b0f199b8fff0 XMM07=443be33ba105a4ccffacd755abe95d2a XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000