syzkaller login: [ 30.391960] BUG: Bad rss-counter state mm:0000000098af599a type:MM_FILEPAGES val:33 [ 30.393348] BUG: Bad rss-counter state mm:0000000098af599a type:MM_ANONPAGES val:22 [ 30.544877] ================================================================== [ 30.545947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.546970] Read of size 8 at addr ffff88800f2b1968 by task sshd/221 [ 30.547830] [ 30.548051] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.548920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.549929] Call Trace: [ 30.550261] [ 30.550549] dump_stack_lvl+0x91/0xf0 [ 30.551044] print_report+0xcc/0x620 [ 30.551531] ? __virt_addr_valid+0x102/0x340 [ 30.552079] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552698] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.553317] kasan_report+0xbe/0xf0 [ 30.553790] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.554417] vma_interval_tree_remove+0xc75/0xec0 [ 30.555029] vma_prepare+0xc54/0x11a0 [ 30.555507] __split_vma+0x5af/0x950 [ 30.555974] ? __pfx___split_vma+0x10/0x10 [ 30.556514] ? find_held_lock+0x2c/0x110 [ 30.557038] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.557605] ? lock_is_held_type+0x9f/0x120 [ 30.558145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.558768] ? mtree_range_walk+0x632/0x900 [ 30.559333] ? mas_walk+0x5c7/0x7c0 [ 30.559813] do_vmi_munmap+0x1f1/0x2b0 [ 30.560315] mmap_region+0x1f9/0x2660 [ 30.560803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.561334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.562052] ? __pfx_lock_acquire+0x10/0x10 [ 30.562614] ? __pfx_mmap_region+0x10/0x10 [ 30.563143] ? security_mmap_addr+0x7d/0xa0 [ 30.563675] ? get_unmapped_area+0x1f5/0x3f0 [ 30.564220] do_mmap+0x854/0xf00 [ 30.564666] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.565160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.565714] ksys_mmap_pgoff+0x3af/0x500 [ 30.566257] do_syscall_64+0x3f/0x90 [ 30.566740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.567396] RIP: 0033:0x7fbcdb28dd82 [ 30.567850] 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 [ 30.569992] RSP: 002b:00007fff35732978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.570913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcdb28dd82 [ 30.571766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcda6c7000 [ 30.572607] RBP: 00007fbcda6c7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.573454] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae6a456ec0 [ 30.574305] R13: 00007fff35732990 R14: 00007fff357329c0 R15: 00007fff35732d20 [ 30.575155] [ 30.575451] [ 30.575663] Allocated by task 214: [ 30.576090] kasan_save_stack+0x22/0x50 [ 30.576594] kasan_set_track+0x25/0x30 [ 30.577084] __kasan_slab_alloc+0x59/0x70 [ 30.577604] kmem_cache_alloc+0x16b/0x370 [ 30.578117] vm_area_dup+0x20/0x160 [ 30.578587] __split_vma+0x170/0x950 [ 30.579055] split_vma+0xc6/0x110 [ 30.579494] mprotect_fixup+0x8d2/0xb30 [ 30.580003] do_mprotect_pkey+0x87e/0xd40 [ 30.580518] __x64_sys_mprotect+0x78/0xc0 [ 30.581043] do_syscall_64+0x3f/0x90 [ 30.581522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.582168] [ 30.582391] Freed by task 214: [ 30.582780] kasan_save_stack+0x22/0x50 [ 30.583280] kasan_set_track+0x25/0x30 [ 30.583781] kasan_save_free_info+0x2b/0x50 [ 30.584319] __kasan_slab_free+0x10a/0x190 [ 30.584848] kmem_cache_free+0x10d/0x4d0 [ 30.585353] rcu_core+0x8c8/0x2860 [ 30.585797] __do_softirq+0x1b7/0x7d4 [ 30.586281] [ 30.586493] Last potentially related work creation: [ 30.587082] kasan_save_stack+0x22/0x50 [ 30.587584] __kasan_record_aux_stack+0x8e/0xa0 [ 30.588160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.588799] remove_vma+0x139/0x170 [ 30.589244] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.589799] do_vmi_munmap+0x1f1/0x2b0 [ 30.590297] __vm_munmap+0x138/0x3a0 [ 30.590772] __x64_sys_munmap+0x59/0x80 [ 30.591272] do_syscall_64+0x3f/0x90 [ 30.591747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.592385] [ 30.592605] The buggy address belongs to the object at ffff88800f2b1910 [ 30.592605] which belongs to the cache vm_area_struct of size 168 [ 30.594078] The buggy address is located 88 bytes inside of [ 30.594078] freed 168-byte region [ffff88800f2b1910, ffff88800f2b19b8) [ 30.595483] [ 30.595699] The buggy address belongs to the physical page: [ 30.596353] page:00000000ce5e1e75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2b1 [ 30.597428] memcg:ffff88800de6aa01 [ 30.597849] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.598511] page_type: 0xffffffff() [ 30.598960] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.599865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de6aa01 [ 30.600759] page dumped because: kasan: bad access detected [ 30.601416] [ 30.601634] Memory state around the buggy address: [ 30.602215] ffff88800f2b1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.603069] ffff88800f2b1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.603915] >ffff88800f2b1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.604757] ^ [ 30.605536] ffff88800f2b1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.606391] ffff88800f2b1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.607238] ================================================================== [ 30.608191] Disabling lock debugging due to kernel taint [ 32.473648] BUG: Bad rss-counter state mm:0000000025b1f3ad type:MM_FILEPAGES val:33 [ 32.474639] BUG: Bad rss-counter state mm:0000000025b1f3ad type:MM_ANONPAGES val:22 [ 33.013633] BUG: Bad rss-counter state mm:000000005105dff6 type:MM_FILEPAGES val:33 [ 33.014782] BUG: Bad rss-counter state mm:000000005105dff6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40435' (ECDSA) to the list of known hosts. 2023/06/20 12:02:37 fuzzer started 2023/06/20 12:02:37 dialing manager at localhost:36067 2023/06/20 12:02:37 checking machine... 2023/06/20 12:02:37 checking revisions... [ 33.712676] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:02:37 testing simple program... [ 33.750294] cgroup: Unknown subsys name 'net' [ 33.802158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:02:36 Registers: info registers vcpu 0 RAX=a384db69d06d4500 RBX=1ffff1100d9c1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8edd RFL=00000282 [--S----] 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 00007fed23fff700 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=00007f1d3e5900b0 CR3=000000000c9ee000 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=2036333a32303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86139b1b RBX=0000000000000001 RCX=ffffffff86139b16 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888015c273a8 RSP=ffff888015c272e0 R8 =ffffffff86139b1a R9 =ffff888015c27390 R10=0000000000038001 R11=0000000000020faa R12=ffff888015c273b0 R13=ffff888015c27398 R14=ffff888015c27848 R15=ffff888015c27350 RIP=ffffffff8113113c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdaa4dd6900 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=00007fdaa41ef490 CR3=000000000f316000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e39b0e14c1ecf47b00000000000ae988 XMM05=544f31a6e15fe34b0000000000132f90 XMM06=c291bd5c70af25b90000000000131d80 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000