syzkaller login: [ 57.448393] BUG: Bad rss-counter state mm:00000000d6b647a7 type:MM_FILEPAGES val:33 [ 57.449738] BUG: Bad rss-counter state mm:00000000d6b647a7 type:MM_ANONPAGES val:22 [ 57.592692] ================================================================== [ 57.593728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.594802] Read of size 8 at addr ffff88800e1a7310 by task sshd/220 [ 57.595760] [ 57.596004] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.596963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.598050] Call Trace: [ 57.598453] [ 57.598791] dump_stack_lvl+0x91/0xf0 [ 57.599348] print_report+0xcc/0x620 [ 57.599895] ? __virt_addr_valid+0x102/0x340 [ 57.600521] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.601207] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.601896] kasan_report+0xbe/0xf0 [ 57.602445] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.603172] vma_interval_tree_remove+0xc75/0xec0 [ 57.603875] vma_prepare+0xc54/0x11a0 [ 57.604430] __split_vma+0x5af/0x950 [ 57.604980] ? __pfx___split_vma+0x10/0x10 [ 57.605613] ? find_held_lock+0x2c/0x110 [ 57.606234] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.606890] ? lock_is_held_type+0x9f/0x120 [ 57.607487] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.608165] ? mtree_range_walk+0x632/0x900 [ 57.608783] ? mas_walk+0x5c7/0x7c0 [ 57.609317] do_vmi_munmap+0x1f1/0x2b0 [ 57.609868] mmap_region+0x1f9/0x2660 [ 57.610433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.611022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.611835] ? __pfx_lock_acquire+0x10/0x10 [ 57.612435] ? __pfx_mmap_region+0x10/0x10 [ 57.613047] ? security_mmap_addr+0x7d/0xa0 [ 57.613673] ? get_unmapped_area+0x1f5/0x3f0 [ 57.614319] do_mmap+0x854/0xf00 [ 57.614846] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.615437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.616095] ksys_mmap_pgoff+0x3af/0x500 [ 57.616692] do_syscall_64+0x3f/0x90 [ 57.617253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.618003] RIP: 0033:0x7fbb07b49d82 [ 57.618552] 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 [ 57.621056] RSP: 002b:00007ffea226af28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.622133] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb07b49d82 [ 57.623146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb06f83000 [ 57.624140] RBP: 00007fbb06f83000 R08: 0000000000000009 R09: 0000000000001000 [ 57.625136] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641cac7ed90 [ 57.626126] R13: 00007ffea226af40 R14: 00007ffea226af70 R15: 00007ffea226b2d0 [ 57.627138] [ 57.627452] [ 57.627689] Allocated by task 213: [ 57.628146] kasan_save_stack+0x22/0x50 [ 57.628685] kasan_set_track+0x25/0x30 [ 57.629216] __kasan_slab_alloc+0x59/0x70 [ 57.629773] kmem_cache_alloc+0x16b/0x370 [ 57.630325] vm_area_dup+0x20/0x160 [ 57.630826] __split_vma+0x170/0x950 [ 57.631322] split_vma+0xc6/0x110 [ 57.631785] mprotect_fixup+0x8d2/0xb30 [ 57.632321] do_mprotect_pkey+0x87e/0xd40 [ 57.632878] __x64_sys_mprotect+0x78/0xc0 [ 57.633433] do_syscall_64+0x3f/0x90 [ 57.633936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.634636] [ 57.634867] Freed by task 213: [ 57.635287] kasan_save_stack+0x22/0x50 [ 57.635822] kasan_set_track+0x25/0x30 [ 57.636346] kasan_save_free_info+0x2b/0x50 [ 57.636912] __kasan_slab_free+0x10a/0x190 [ 57.637483] kmem_cache_free+0x10d/0x4d0 [ 57.638025] rcu_core+0x8c8/0x2860 [ 57.638526] __do_softirq+0x1b7/0x7d4 [ 57.639033] [ 57.639261] Last potentially related work creation: [ 57.639881] kasan_save_stack+0x22/0x50 [ 57.640418] __kasan_record_aux_stack+0x8e/0xa0 [ 57.641027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.641708] remove_vma+0x139/0x170 [ 57.642189] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.642792] do_vmi_munmap+0x1f1/0x2b0 [ 57.643306] __vm_munmap+0x138/0x3a0 [ 57.643800] __x64_sys_munmap+0x59/0x80 [ 57.644324] do_syscall_64+0x3f/0x90 [ 57.644821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.645502] [ 57.645738] Second to last potentially related work creation: [ 57.646470] kasan_save_stack+0x22/0x50 [ 57.647015] __kasan_record_aux_stack+0x8e/0xa0 [ 57.647630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.648315] remove_vma+0x139/0x170 [ 57.648796] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.649385] do_vmi_munmap+0x1f1/0x2b0 [ 57.649900] mmap_region+0x1f9/0x2660 [ 57.650425] do_mmap+0x854/0xf00 [ 57.650881] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.651392] ksys_mmap_pgoff+0x3af/0x500 [ 57.651922] do_syscall_64+0x3f/0x90 [ 57.652425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.653109] [ 57.653341] The buggy address belongs to the object at ffff88800e1a72b8 [ 57.653341] which belongs to the cache vm_area_struct of size 168 [ 57.654916] The buggy address is located 88 bytes inside of [ 57.654916] freed 168-byte region [ffff88800e1a72b8, ffff88800e1a7360) [ 57.656411] [ 57.656643] The buggy address belongs to the physical page: [ 57.657347] page:00000000914178fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a7 [ 57.658513] memcg:ffff88800e1d0c01 [ 57.658968] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.659661] page_type: 0xffffffff() [ 57.660141] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 57.661118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d0c01 [ 57.662085] page dumped because: kasan: bad access detected [ 57.662807] [ 57.663035] Memory state around the buggy address: [ 57.663653] ffff88800e1a7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 57.664562] ffff88800e1a7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.665477] >ffff88800e1a7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.666380] ^ [ 57.666892] ffff88800e1a7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.667799] ffff88800e1a7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 57.668704] ================================================================== [ 57.669974] Disabling lock debugging due to kernel taint [ 59.682196] BUG: Bad rss-counter state mm:0000000050446e93 type:MM_FILEPAGES val:33 [ 59.683211] BUG: Bad rss-counter state mm:0000000050446e93 type:MM_ANONPAGES val:22 [ 60.291420] BUG: Bad rss-counter state mm:00000000751f5838 type:MM_FILEPAGES val:33 [ 60.292585] BUG: Bad rss-counter state mm:00000000751f5838 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47612' (ECDSA) to the list of known hosts. 2023/06/19 12:51:00 fuzzer started 2023/06/19 12:51:00 dialing manager at localhost:44161 2023/06/19 12:51:00 checking machine... 2023/06/19 12:51:00 checking revisions... [ 60.913163] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:51:00 testing simple program... [ 60.976356] cgroup: Unknown subsys name 'net' [ 61.052149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:50:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f24f9f0 RCX=ffffffff863b1c01 RDX=1ffff11001e49f3f RSI=ffffffff84506c7f RDI=ffff88800f24f9f8 RBP=000000000000000a RSP=ffff88800f24f908 R8 =ffffffff863b1c9a R9 =ffff88800f24f968 R10=0000000000038001 R11=000000000008a977 R12=ffff88800f24f9f0 R13=0000000000000000 R14=ffff888009b43680 R15=0000000000000cc0 RIP=ffffffff813ad47f RFL=00000287 [--S--PC] 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 00007f3fe5f88900 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=00007f3fe65400b0 CR3=000000000da4e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001ab7fdb RBX=ffff88800d5bfea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d5bfed8 RBP=ffff88800d52f740 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800d5e0730 R14=ffffffff813782a8 R15=ffff88800d5e0730 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=00007fd48f211c20 CR3=000000000d9a8000 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=6405cfac5792b987dc4cba9941d4ad44 XMM02=2c67c8bc2e329bc3000000000011e4c0 XMM03=fb795ef6d657705600000000001246e8 XMM04=bfbf1bd889d26c5500000000000ae988 XMM05=e49241b6174877bf0000000000136af8 XMM06=4fda316b135da52b0000000000135148 XMM07=e042d86d42eb936e00000000001249c0 XMM08=36c0f2b60da89cba000000000011e520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000