syzkaller login: [ 40.999814] BUG: Bad rss-counter state mm:000000008405d942 type:MM_FILEPAGES val:33 [ 41.001190] BUG: Bad rss-counter state mm:000000008405d942 type:MM_ANONPAGES val:22 [ 41.169884] ================================================================== [ 41.170925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.171999] Read of size 8 at addr ffff88801677f228 by task sshd/221 [ 41.172925] [ 41.173170] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.174143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.175225] Call Trace: [ 41.175609] [ 41.175928] dump_stack_lvl+0x91/0xf0 [ 41.176479] print_report+0xcc/0x620 [ 41.177019] ? __virt_addr_valid+0x102/0x340 [ 41.177642] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.178334] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.179051] kasan_report+0xbe/0xf0 [ 41.179615] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.180327] vma_interval_tree_remove+0xc75/0xec0 [ 41.181018] vma_prepare+0xc54/0x11a0 [ 41.181572] __split_vma+0x5af/0x950 [ 41.182113] ? __pfx___split_vma+0x10/0x10 [ 41.182724] ? find_held_lock+0x2c/0x110 [ 41.183324] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.184000] ? lock_is_held_type+0x9f/0x120 [ 41.184614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.185290] ? mtree_range_walk+0x632/0x900 [ 41.185909] ? mas_walk+0x5c7/0x7c0 [ 41.186443] do_vmi_munmap+0x1f1/0x2b0 [ 41.186994] mmap_region+0x1f9/0x2660 [ 41.187545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.188119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.188914] ? __pfx_lock_acquire+0x10/0x10 [ 41.189515] ? __pfx_mmap_region+0x10/0x10 [ 41.190111] ? security_mmap_addr+0x7d/0xa0 [ 41.190710] ? get_unmapped_area+0x1f5/0x3f0 [ 41.191325] do_mmap+0x854/0xf00 [ 41.191833] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.192383] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.193015] ksys_mmap_pgoff+0x3af/0x500 [ 41.193587] do_syscall_64+0x3f/0x90 [ 41.194123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.194847] RIP: 0033:0x7f3bfd8d1d82 [ 41.195375] 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 [ 41.197749] RSP: 002b:00007ffdb6d1c4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.198768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bfd8d1d82 [ 41.199719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bfcd0b000 [ 41.200664] RBP: 00007f3bfcd0b000 R08: 0000000000000009 R09: 0000000000001000 [ 41.201619] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592a8ae8f60 [ 41.202572] R13: 00007ffdb6d1c500 R14: 00007ffdb6d1c530 R15: 00007ffdb6d1c890 [ 41.203532] [ 41.203851] [ 41.204090] Allocated by task 214: [ 41.204562] kasan_save_stack+0x22/0x50 [ 41.205114] kasan_set_track+0x25/0x30 [ 41.205660] __kasan_slab_alloc+0x59/0x70 [ 41.206237] kmem_cache_alloc+0x16b/0x370 [ 41.206801] vm_area_dup+0x20/0x160 [ 41.207296] __split_vma+0x170/0x950 [ 41.207828] split_vma+0xc6/0x110 [ 41.208307] mprotect_fixup+0x8d2/0xb30 [ 41.208855] do_mprotect_pkey+0x87e/0xd40 [ 41.209426] __x64_sys_mprotect+0x78/0xc0 [ 41.209999] do_syscall_64+0x3f/0x90 [ 41.210514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.211216] [ 41.211460] Freed by task 214: [ 41.211889] kasan_save_stack+0x22/0x50 [ 41.212436] kasan_set_track+0x25/0x30 [ 41.212974] kasan_save_free_info+0x2b/0x50 [ 41.213558] __kasan_slab_free+0x10a/0x190 [ 41.214141] kmem_cache_free+0x10d/0x4d0 [ 41.214704] rcu_core+0x8c8/0x2860 [ 41.215186] __do_softirq+0x1b7/0x7d4 [ 41.215715] [ 41.215950] Last potentially related work creation: [ 41.216586] kasan_save_stack+0x22/0x50 [ 41.217129] __kasan_record_aux_stack+0x8e/0xa0 [ 41.217749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.218442] remove_vma+0x139/0x170 [ 41.218931] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.219540] do_vmi_munmap+0x1f1/0x2b0 [ 41.220064] __vm_munmap+0x138/0x3a0 [ 41.220575] __x64_sys_munmap+0x59/0x80 [ 41.221111] do_syscall_64+0x3f/0x90 [ 41.221620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.222310] [ 41.222544] The buggy address belongs to the object at ffff88801677f1d0 [ 41.222544] which belongs to the cache vm_area_struct of size 168 [ 41.224143] The buggy address is located 88 bytes inside of [ 41.224143] freed 168-byte region [ffff88801677f1d0, ffff88801677f278) [ 41.225662] [ 41.225895] The buggy address belongs to the physical page: [ 41.226605] page:00000000478a6e2a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1677f [ 41.227776] memcg:ffff888006864a01 [ 41.228233] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.228932] page_type: 0xffffffff() [ 41.229414] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.230403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006864a01 [ 41.231376] page dumped because: kasan: bad access detected [ 41.232081] [ 41.232312] Memory state around the buggy address: [ 41.232933] ffff88801677f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.233842] ffff88801677f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.234748] >ffff88801677f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.235668] ^ [ 41.236267] ffff88801677f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.237176] ffff88801677f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.238080] ================================================================== [ 41.239282] Disabling lock debugging due to kernel taint [ 43.300750] BUG: Bad rss-counter state mm:00000000881c08a7 type:MM_FILEPAGES val:33 [ 43.301910] BUG: Bad rss-counter state mm:00000000881c08a7 type:MM_ANONPAGES val:22 [ 43.867830] BUG: Bad rss-counter state mm:00000000e0bcd9f9 type:MM_FILEPAGES val:33 [ 43.868897] BUG: Bad rss-counter state mm:00000000e0bcd9f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61338' (ECDSA) to the list of known hosts. 2023/06/19 12:57:23 fuzzer started 2023/06/19 12:57:23 dialing manager at localhost:44161 2023/06/19 12:57:23 checking machine... 2023/06/19 12:57:23 checking revisions... [ 44.513444] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:57:24 testing simple program... [ 44.563059] cgroup: Unknown subsys name 'net' [ 44.600907] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:57:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800694f8e0 RCX=ffff88800694f8e8 RDX=ffff888006950000 RSI=1ffff11000d29f0b RDI=ffff88800694f848 RBP=dffffc0000000000 RSP=ffff88800694f7e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800694f848 R11=00000000000b6996 R12=ffffed1000d29f0b R13=ffffed1000d29f0a R14=ffff88800694f890 R15=ffff88800694f848 RIP=ffffffff811305e0 RFL=00000216 [----AP-] 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 00007f97910c6900 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=00007ffefd83c000 CR3=000000000c9ce000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f64712d4030 CR3=0000000008eda000 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=8ec1a8d48c7b5cbff942cb66c2d87953 XMM02=000000000011d500eff9b2d0a8fce9cb XMM03=000000000011d5d02c67c8bc2e329bc3 XMM04=57df807cde0bcd9300000000000ae988 XMM05=ccbf149a171f7bc30000000000134ad0 XMM06=c291bd5c70af25b900000000001344c8 XMM07=e042d86d42eb936e0000000000124d68 XMM08=70d0bc3d58cea845000000000011d5d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000