syzkaller login: [ 63.463982] BUG: Bad rss-counter state mm:000000000bb5f390 type:MM_FILEPAGES val:33 [ 63.465508] BUG: Bad rss-counter state mm:000000000bb5f390 type:MM_ANONPAGES val:22 [ 63.602943] ================================================================== [ 63.604046] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.605167] Read of size 8 at addr ffff888018341310 by task sshd/220 [ 63.606224] [ 63.606516] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.607581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.608631] Call Trace: [ 63.608963] [ 63.609257] dump_stack_lvl+0x91/0xf0 [ 63.609764] print_report+0xcc/0x620 [ 63.610262] ? __virt_addr_valid+0x102/0x340 [ 63.610843] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.611485] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.612130] kasan_report+0xbe/0xf0 [ 63.612614] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.613249] vma_interval_tree_remove+0xc75/0xec0 [ 63.613872] vma_prepare+0xc54/0x11a0 [ 63.614359] __split_vma+0x5af/0x950 [ 63.614848] ? __pfx___split_vma+0x10/0x10 [ 63.615396] ? find_held_lock+0x2c/0x110 [ 63.615921] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.616499] ? lock_is_held_type+0x9f/0x120 [ 63.617053] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.617676] ? mtree_range_walk+0x632/0x900 [ 63.618243] ? mas_walk+0x5c7/0x7c0 [ 63.618745] do_vmi_munmap+0x1f1/0x2b0 [ 63.619249] mmap_region+0x1f9/0x2660 [ 63.619739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.620258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.620985] ? __pfx_lock_acquire+0x10/0x10 [ 63.621531] ? __pfx_mmap_region+0x10/0x10 [ 63.622072] ? security_mmap_addr+0x7d/0xa0 [ 63.622612] ? get_unmapped_area+0x1f5/0x3f0 [ 63.623183] do_mmap+0x854/0xf00 [ 63.623630] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.624142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.624711] ksys_mmap_pgoff+0x3af/0x500 [ 63.625234] do_syscall_64+0x3f/0x90 [ 63.625727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.626391] RIP: 0033:0x7f1b94c89d82 [ 63.626870] 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 [ 63.629121] RSP: 002b:00007fff55792c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.630043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b94c89d82 [ 63.630922] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b940c3000 [ 63.631781] RBP: 00007f1b940c3000 R08: 0000000000000009 R09: 0000000000001000 [ 63.632650] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f153b24ec0 [ 63.633502] R13: 00007fff55792c90 R14: 00007fff55792cc0 R15: 00007fff55793020 [ 63.634378] [ 63.634698] [ 63.634913] Allocated by task 213: [ 63.635351] kasan_save_stack+0x22/0x50 [ 63.635865] kasan_set_track+0x25/0x30 [ 63.636368] __kasan_slab_alloc+0x59/0x70 [ 63.636892] kmem_cache_alloc+0x16b/0x370 [ 63.637422] vm_area_dup+0x20/0x160 [ 63.637885] __split_vma+0x170/0x950 [ 63.638363] split_vma+0xc6/0x110 [ 63.638825] mprotect_fixup+0x8d2/0xb30 [ 63.639334] do_mprotect_pkey+0x87e/0xd40 [ 63.639875] __x64_sys_mprotect+0x78/0xc0 [ 63.640413] do_syscall_64+0x3f/0x90 [ 63.640891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.641543] [ 63.641767] Freed by task 213: [ 63.642165] kasan_save_stack+0x22/0x50 [ 63.642674] kasan_set_track+0x25/0x30 [ 63.643198] kasan_save_free_info+0x2b/0x50 [ 63.643745] __kasan_slab_free+0x10a/0x190 [ 63.644313] kmem_cache_free+0x10d/0x4d0 [ 63.644866] rcu_core+0x8c8/0x2860 [ 63.645329] __do_softirq+0x1b7/0x7d4 [ 63.645837] [ 63.646065] Last potentially related work creation: [ 63.646670] kasan_save_stack+0x22/0x50 [ 63.647321] __kasan_record_aux_stack+0x8e/0xa0 [ 63.647912] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.648593] remove_vma+0x139/0x170 [ 63.649045] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.649604] do_vmi_munmap+0x1f1/0x2b0 [ 63.650106] __vm_munmap+0x138/0x3a0 [ 63.650594] __x64_sys_munmap+0x59/0x80 [ 63.651132] do_syscall_64+0x3f/0x90 [ 63.651608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.652262] [ 63.652485] The buggy address belongs to the object at ffff8880183412b8 [ 63.652485] which belongs to the cache vm_area_struct of size 168 [ 63.653995] The buggy address is located 88 bytes inside of [ 63.653995] freed 168-byte region [ffff8880183412b8, ffff888018341360) [ 63.655454] [ 63.655672] The buggy address belongs to the physical page: [ 63.656357] page:00000000b84a6f67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18341 [ 63.657468] memcg:ffff88800c9a1901 [ 63.657903] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.658559] page_type: 0xffffffff() [ 63.659044] raw: 0100000000000200 ffff88800879fc80 ffffea000057b080 dead00000000000c [ 63.659997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9a1901 [ 63.660916] page dumped because: kasan: bad access detected [ 63.661595] [ 63.661816] Memory state around the buggy address: [ 63.662398] ffff888018341200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 63.663274] ffff888018341280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.664151] >ffff888018341300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.665005] ^ [ 63.665477] ffff888018341380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 63.666344] ffff888018341400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 63.667216] ================================================================== [ 63.668145] Disabling lock debugging due to kernel taint [ 65.594053] BUG: Bad rss-counter state mm:00000000eec1074a type:MM_FILEPAGES val:33 [ 65.595207] BUG: Bad rss-counter state mm:00000000eec1074a type:MM_ANONPAGES val:22 [ 66.079849] BUG: Bad rss-counter state mm:00000000f55e54c4 type:MM_FILEPAGES val:33 [ 66.080833] BUG: Bad rss-counter state mm:00000000f55e54c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13917' (ECDSA) to the list of known hosts. 2023/06/20 07:07:55 fuzzer started 2023/06/20 07:07:56 dialing manager at localhost:44161 2023/06/20 07:07:56 checking machine... 2023/06/20 07:07:56 checking revisions... [ 66.799067] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:07:56 testing simple program... [ 66.839953] cgroup: Unknown subsys name 'net' [ 66.886956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:07:52 Registers: info registers vcpu 0 RAX=0000000000000c00 RBX=00005647fb238ed0 RCX=00005647fb246e90 RDX=00000000fbad2488 RSI=00005647fb246e90 RDI=00005647fb238ed0 RBP=00007f2bc3d4e4a0 RSP=00007ffc06b8e020 R8 =00005647fb246e90 R9 =00007f2bc3d4cbe0 R10=0000000040000000 R11=0000000000000000 R12=00005647fb231b70 R13=00007f2bc3d4d8a0 R14=0000000000000d68 R15=0000000000000d68 RIP=00007f2bc3c0f884 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2bc379a900 00000000 00000000 GS =0000 0000000000000000 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=00007f0c6eea1240 CR3=000000000e0ce000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003458db5 RBX=ffff88801a2c6d78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a2c6da8 RBP=ffff88801a2ed398 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88801a2edb80 R14=ffffffff813782a8 R15=ffff88801a2edb80 RIP=ffffffff81846362 RFL=00000046 [---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 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=00007f2bc3d520b0 CR3=000000000efb0000 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=2035353a37303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000