syzkaller login: [ 38.995133] BUG: Bad rss-counter state mm:00000000484b6697 type:MM_FILEPAGES val:33 [ 38.996320] BUG: Bad rss-counter state mm:00000000484b6697 type:MM_ANONPAGES val:22 [ 39.159328] ================================================================== [ 39.160251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.161194] Read of size 8 at addr ffff888016b72d08 by task sshd/220 [ 39.161960] [ 39.162270] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.163130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.164114] Call Trace: [ 39.164446] [ 39.164734] dump_stack_lvl+0x91/0xf0 [ 39.165228] print_report+0xcc/0x620 [ 39.165711] ? __virt_addr_valid+0x102/0x340 [ 39.166269] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.166887] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.167501] kasan_report+0xbe/0xf0 [ 39.168075] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.168690] vma_interval_tree_remove+0xc75/0xec0 [ 39.169287] vma_prepare+0xc54/0x11a0 [ 39.169763] __split_vma+0x5af/0x950 [ 39.170238] ? __pfx___split_vma+0x10/0x10 [ 39.170764] ? find_held_lock+0x2c/0x110 [ 39.171283] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.171864] ? lock_is_held_type+0x9f/0x120 [ 39.172415] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.173042] ? mtree_range_walk+0x632/0x900 [ 39.173595] ? mas_walk+0x5c7/0x7c0 [ 39.174073] do_vmi_munmap+0x1f1/0x2b0 [ 39.174566] mmap_region+0x1f9/0x2660 [ 39.175053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.175565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.176317] ? __pfx_lock_acquire+0x10/0x10 [ 39.176858] ? __pfx_mmap_region+0x10/0x10 [ 39.177385] ? security_mmap_addr+0x7d/0xa0 [ 39.177917] ? get_unmapped_area+0x1f5/0x3f0 [ 39.178470] do_mmap+0x854/0xf00 [ 39.178906] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.179413] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.179979] ksys_mmap_pgoff+0x3af/0x500 [ 39.180492] do_syscall_64+0x3f/0x90 [ 39.180977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.181630] RIP: 0033:0x7f7fb9dbed82 [ 39.182091] 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 [ 39.184253] RSP: 002b:00007ffd7bccf348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.185160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fb9dbed82 [ 39.186009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fb91f8000 [ 39.186853] RBP: 00007f7fb91f8000 R08: 0000000000000009 R09: 0000000000001000 [ 39.187713] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559063720ec0 [ 39.188571] R13: 00007ffd7bccf360 R14: 00007ffd7bccf390 R15: 00007ffd7bccf6f0 [ 39.189435] [ 39.189725] [ 39.189939] Allocated by task 213: [ 39.190359] kasan_save_stack+0x22/0x50 [ 39.190863] kasan_set_track+0x25/0x30 [ 39.191350] __kasan_slab_alloc+0x59/0x70 [ 39.191880] kmem_cache_alloc+0x16b/0x370 [ 39.192402] vm_area_dup+0x20/0x160 [ 39.192857] __split_vma+0x170/0x950 [ 39.193320] split_vma+0xc6/0x110 [ 39.193757] mprotect_fixup+0x8d2/0xb30 [ 39.194259] do_mprotect_pkey+0x87e/0xd40 [ 39.194772] __x64_sys_mprotect+0x78/0xc0 [ 39.195289] do_syscall_64+0x3f/0x90 [ 39.195772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.196428] [ 39.196641] Freed by task 213: [ 39.197024] kasan_save_stack+0x22/0x50 [ 39.197517] kasan_set_track+0x25/0x30 [ 39.198003] kasan_save_free_info+0x2b/0x50 [ 39.198530] __kasan_slab_free+0x10a/0x190 [ 39.199057] kmem_cache_free+0x10d/0x4d0 [ 39.199561] rcu_core+0x8c8/0x2860 [ 39.200004] __do_softirq+0x1b7/0x7d4 [ 39.200480] [ 39.200693] Last potentially related work creation: [ 39.201285] kasan_save_stack+0x22/0x50 [ 39.201777] __kasan_record_aux_stack+0x8e/0xa0 [ 39.202343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.202981] remove_vma+0x139/0x170 [ 39.203432] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.203985] do_vmi_munmap+0x1f1/0x2b0 [ 39.204463] __vm_munmap+0x138/0x3a0 [ 39.204917] __x64_sys_munmap+0x59/0x80 [ 39.205409] do_syscall_64+0x3f/0x90 [ 39.205881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.206512] [ 39.206724] The buggy address belongs to the object at ffff888016b72cb0 [ 39.206724] which belongs to the cache vm_area_struct of size 168 [ 39.208233] The buggy address is located 88 bytes inside of [ 39.208233] freed 168-byte region [ffff888016b72cb0, ffff888016b72d58) [ 39.209633] [ 39.209847] The buggy address belongs to the physical page: [ 39.210516] page:000000009d38efc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b72 [ 39.211607] memcg:ffff88800cbd1c01 [ 39.212057] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.212709] page_type: 0xffffffff() [ 39.213163] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.214097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbd1c01 [ 39.215008] page dumped because: kasan: bad access detected [ 39.215673] [ 39.215901] Memory state around the buggy address: [ 39.216492] ffff888016b72c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.217362] ffff888016b72c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.218233] >ffff888016b72d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.219093] ^ [ 39.219546] ffff888016b72d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.220421] ffff888016b72e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.221303] ================================================================== [ 39.222342] Disabling lock debugging due to kernel taint [ 41.650625] BUG: Bad rss-counter state mm:00000000d84a3cbd type:MM_FILEPAGES val:33 [ 41.651789] BUG: Bad rss-counter state mm:00000000d84a3cbd type:MM_ANONPAGES val:22 [ 42.064431] BUG: Bad rss-counter state mm:0000000069a01bf3 type:MM_FILEPAGES val:33 [ 42.065314] BUG: Bad rss-counter state mm:0000000069a01bf3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39242' (ECDSA) to the list of known hosts. 2023/06/20 18:10:39 fuzzer started 2023/06/20 18:10:39 dialing manager at localhost:36067 2023/06/20 18:10:39 checking machine... 2023/06/20 18:10:39 checking revisions... [ 42.891975] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:10:39 testing simple program... [ 42.946315] cgroup: Unknown subsys name 'net' [ 43.009238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:10:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff8880146db680 RSI=ffffffff81893c7b RDI=ffff888014637d1a RBP=ffff888014637d1a RSP=ffff8880146378a0 R8 =0000000000000001 R9 =0000000000000000 R10=000000000000002f R11=63206e6f69737365 R12=0000000000000001 R13=ffffffff85d3e300 R14=ffff888014637928 R15=ffff888014637d36 RIP=ffffffff844d9224 RFL=00000293 [--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 00007fd360e83900 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=00007fd36029d5a0 CR3=000000000d99e000 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=2038333a30313a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a30313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844b88ed RDX=ffff88800f960000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff8880145ffca8 RSP=ffff8880145ff9e8 R8 =0000000000000006 R9 =00007f9524a78fff R10=0000000000000001 R11=0000000000000000 R12=00007f9524a78fff R13=0000000000000001 R14=ffff8880145ffcc0 R15=ffff8880145ffcb0 RIP=ffffffff814c027c 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 00007f9524a8d900 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=00007f9524a57008 CR3=000000001c680000 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