syzkaller login: [ 30.680504] BUG: Bad rss-counter state mm:000000009830b634 type:MM_FILEPAGES val:33 [ 30.681735] BUG: Bad rss-counter state mm:000000009830b634 type:MM_ANONPAGES val:22 [ 30.719883] ================================================================== [ 30.720938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.721902] Read of size 8 at addr ffff88800dff7310 by task sshd/220 [ 30.722772] [ 30.722990] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.723848] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.724837] Call Trace: [ 30.725154] [ 30.725446] dump_stack_lvl+0x91/0xf0 [ 30.725937] print_report+0xcc/0x620 [ 30.726418] ? __virt_addr_valid+0x102/0x340 [ 30.726974] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728203] kasan_report+0xbe/0xf0 [ 30.728674] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729296] vma_interval_tree_remove+0xc75/0xec0 [ 30.729898] vma_prepare+0xc54/0x11a0 [ 30.730370] __split_vma+0x5af/0x950 [ 30.730841] ? __pfx___split_vma+0x10/0x10 [ 30.731368] ? find_held_lock+0x2c/0x110 [ 30.731890] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.732453] ? lock_is_held_type+0x9f/0x120 [ 30.732989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.733614] ? mtree_range_walk+0x632/0x900 [ 30.734166] ? mas_walk+0x5c7/0x7c0 [ 30.734639] do_vmi_munmap+0x1f1/0x2b0 [ 30.735130] mmap_region+0x1f9/0x2660 [ 30.735606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.736114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.736825] ? __pfx_lock_acquire+0x10/0x10 [ 30.737357] ? __pfx_mmap_region+0x10/0x10 [ 30.737885] ? security_mmap_addr+0x7d/0xa0 [ 30.738408] ? get_unmapped_area+0x1f5/0x3f0 [ 30.738955] do_mmap+0x854/0xf00 [ 30.739391] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.739886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.740445] ksys_mmap_pgoff+0x3af/0x500 [ 30.740946] do_syscall_64+0x3f/0x90 [ 30.741426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742068] RIP: 0033:0x7f9cefc97d82 [ 30.742526] 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 [ 30.744644] RSP: 002b:00007ffe72dead78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.745569] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cefc97d82 [ 30.746413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cef0d1000 [ 30.747250] RBP: 00007f9cef0d1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.748166] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb2592fec0 [ 30.749007] R13: 00007ffe72dead90 R14: 00007ffe72deadc0 R15: 00007ffe72deb120 [ 30.749878] [ 30.750169] [ 30.750382] Allocated by task 213: [ 30.750808] kasan_save_stack+0x22/0x50 [ 30.751306] kasan_set_track+0x25/0x30 [ 30.751798] __kasan_slab_alloc+0x59/0x70 [ 30.752316] kmem_cache_alloc+0x16b/0x370 [ 30.752827] vm_area_dup+0x20/0x160 [ 30.753294] __split_vma+0x170/0x950 [ 30.753757] split_vma+0xc6/0x110 [ 30.754194] mprotect_fixup+0x8d2/0xb30 [ 30.754690] do_mprotect_pkey+0x87e/0xd40 [ 30.755209] __x64_sys_mprotect+0x78/0xc0 [ 30.755724] do_syscall_64+0x3f/0x90 [ 30.756202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756841] [ 30.757055] Freed by task 213: [ 30.757457] kasan_save_stack+0x22/0x50 [ 30.757961] kasan_set_track+0x25/0x30 [ 30.758450] kasan_save_free_info+0x2b/0x50 [ 30.758975] __kasan_slab_free+0x10a/0x190 [ 30.759501] kmem_cache_free+0x10d/0x4d0 [ 30.760001] rcu_core+0x8c8/0x2860 [ 30.760439] __do_softirq+0x1b7/0x7d4 [ 30.760911] [ 30.761124] Last potentially related work creation: [ 30.761709] kasan_save_stack+0x22/0x50 [ 30.762220] __kasan_record_aux_stack+0x8e/0xa0 [ 30.762789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.763424] remove_vma+0x139/0x170 [ 30.763869] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.764415] do_vmi_munmap+0x1f1/0x2b0 [ 30.764893] __vm_munmap+0x138/0x3a0 [ 30.765408] __x64_sys_munmap+0x59/0x80 [ 30.765897] do_syscall_64+0x3f/0x90 [ 30.766369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767006] [ 30.767219] Second to last potentially related work creation: [ 30.767904] kasan_save_stack+0x22/0x50 [ 30.768401] __kasan_record_aux_stack+0x8e/0xa0 [ 30.768965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.769614] remove_vma+0x139/0x170 [ 30.770060] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.770611] do_vmi_munmap+0x1f1/0x2b0 [ 30.771098] mmap_region+0x1f9/0x2660 [ 30.771569] do_mmap+0x854/0xf00 [ 30.772001] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.772483] ksys_mmap_pgoff+0x3af/0x500 [ 30.772977] do_syscall_64+0x3f/0x90 [ 30.773461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774098] [ 30.774310] The buggy address belongs to the object at ffff88800dff72b8 [ 30.774310] which belongs to the cache vm_area_struct of size 168 [ 30.775768] The buggy address is located 88 bytes inside of [ 30.775768] freed 168-byte region [ffff88800dff72b8, ffff88800dff7360) [ 30.777161] [ 30.777385] The buggy address belongs to the physical page: [ 30.778044] page:0000000020f8a617 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdff7 [ 30.779126] memcg:ffff88800ded3801 [ 30.779551] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.780276] page_type: 0xffffffff() [ 30.780723] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6080 dead000000000003 [ 30.781646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded3801 [ 30.782551] page dumped because: kasan: bad access detected [ 30.783205] [ 30.783420] Memory state around the buggy address: [ 30.784003] ffff88800dff7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.784842] ffff88800dff7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.785697] >ffff88800dff7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.786550] ^ [ 30.787009] ffff88800dff7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.787863] ffff88800dff7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.788710] ================================================================== [ 30.789654] Disabling lock debugging due to kernel taint [ 32.387382] BUG: Bad rss-counter state mm:000000007b4200b6 type:MM_FILEPAGES val:33 [ 32.388150] BUG: Bad rss-counter state mm:000000007b4200b6 type:MM_ANONPAGES val:22 [ 32.796628] BUG: Bad rss-counter state mm:00000000a9ff9351 type:MM_FILEPAGES val:33 [ 32.797393] BUG: Bad rss-counter state mm:00000000a9ff9351 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33332' (ECDSA) to the list of known hosts. 2023/06/20 21:55:59 fuzzer started 2023/06/20 21:55:59 dialing manager at localhost:36067 2023/06/20 21:55:59 checking machine... 2023/06/20 21:55:59 checking revisions... [ 33.457988] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:55:59 testing simple program... [ 33.502017] cgroup: Unknown subsys name 'net' [ 33.561953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:59 Registers: info registers vcpu 0 RAX=ffff88801ce5d7a0 RBX=ffff888008d9fdc8 RCX=1ffff110039cbaf4 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008d9fdd8 RBP=0000000000000001 RSP=ffff888008d9fd30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008d9fdc8 R14=ffff88806ce35000 R15=ffff88800ee001b0 RIP=ffffffff8137fcd4 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=00007f9039536044 CR3=0000000018372000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=1c36237eb89871fe5ead66c2d04c8497 XMM04=1bfcc94c9331060c814ab656442b23bd XMM05=000000000000000000000000000000ff XMM06=1b36234c9331060c5e4a6656442b2397 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f540ae3ddd0 CR3=000000000e412000 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=2039353a35353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35353a3132203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000