syzkaller login: [ 40.783718] BUG: Bad rss-counter state mm:00000000539c3e34 type:MM_FILEPAGES val:33 [ 40.785083] BUG: Bad rss-counter state mm:00000000539c3e34 type:MM_ANONPAGES val:22 [ 40.823314] ================================================================== [ 40.824444] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.825561] Read of size 8 at addr ffff88800e941058 by task sshd/220 [ 40.826506] [ 40.826740] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.827850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.829000] Call Trace: [ 40.829415] [ 40.829755] dump_stack_lvl+0x91/0xf0 [ 40.830319] print_report+0xcc/0x620 [ 40.830931] ? __virt_addr_valid+0x102/0x340 [ 40.831600] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.832343] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.833110] kasan_report+0xbe/0xf0 [ 40.833641] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.834338] vma_interval_tree_remove+0xc75/0xec0 [ 40.835022] vma_prepare+0xc54/0x11a0 [ 40.835692] __split_vma+0x5af/0x950 [ 40.836226] ? __pfx___split_vma+0x10/0x10 [ 40.836815] ? find_held_lock+0x2c/0x110 [ 40.837391] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.838006] ? lock_is_held_type+0x9f/0x120 [ 40.838596] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.839299] ? mtree_range_walk+0x632/0x900 [ 40.839903] ? mas_walk+0x5c7/0x7c0 [ 40.840427] do_vmi_munmap+0x1f1/0x2b0 [ 40.840971] mmap_region+0x1f9/0x2660 [ 40.841499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.842063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.842849] ? __pfx_lock_acquire+0x10/0x10 [ 40.843436] ? __pfx_mmap_region+0x10/0x10 [ 40.844019] ? security_mmap_addr+0x7d/0xa0 [ 40.844602] ? get_unmapped_area+0x1f5/0x3f0 [ 40.845205] do_mmap+0x854/0xf00 [ 40.845685] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.846225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.846851] ksys_mmap_pgoff+0x3af/0x500 [ 40.847418] do_syscall_64+0x3f/0x90 [ 40.847945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.848652] RIP: 0033:0x7fe4d4ab8d82 [ 40.849168] 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 [ 40.851493] RSP: 002b:00007ffd93503c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.852451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe4d4ab8d82 [ 40.853350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe4d3ef2000 [ 40.854250] RBP: 00007fe4d3ef2000 R08: 0000000000000009 R09: 0000000000001000 [ 40.855161] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ed2b1eec0 [ 40.856063] R13: 00007ffd93503c50 R14: 00007ffd93503c80 R15: 00007ffd93503fe0 [ 40.856965] [ 40.857269] [ 40.857501] Allocated by task 213: [ 40.857959] kasan_save_stack+0x22/0x50 [ 40.858504] kasan_set_track+0x25/0x30 [ 40.859097] __kasan_slab_alloc+0x59/0x70 [ 40.859670] kmem_cache_alloc+0x16b/0x370 [ 40.860240] vm_area_dup+0x20/0x160 [ 40.860743] __split_vma+0x170/0x950 [ 40.861270] split_vma+0xc6/0x110 [ 40.861749] mprotect_fixup+0x8d2/0xb30 [ 40.862294] do_mprotect_pkey+0x87e/0xd40 [ 40.862873] __x64_sys_mprotect+0x78/0xc0 [ 40.863446] do_syscall_64+0x3f/0x90 [ 40.863972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.864669] [ 40.864905] Freed by task 213: [ 40.865330] kasan_save_stack+0x22/0x50 [ 40.865873] kasan_set_track+0x25/0x30 [ 40.866416] kasan_save_free_info+0x2b/0x50 [ 40.867013] __kasan_slab_free+0x10a/0x190 [ 40.867590] kmem_cache_free+0x10d/0x4d0 [ 40.868147] rcu_core+0x8c8/0x2860 [ 40.868632] __do_softirq+0x1b7/0x7d4 [ 40.869147] [ 40.869378] Last potentially related work creation: [ 40.870011] kasan_save_stack+0x22/0x50 [ 40.870555] __kasan_record_aux_stack+0x8e/0xa0 [ 40.871194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.871897] remove_vma+0x139/0x170 [ 40.872386] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.872992] do_vmi_munmap+0x1f1/0x2b0 [ 40.873521] __vm_munmap+0x138/0x3a0 [ 40.874032] __x64_sys_munmap+0x59/0x80 [ 40.874570] do_syscall_64+0x3f/0x90 [ 40.875091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.875784] [ 40.876017] Second to last potentially related work creation: [ 40.876777] kasan_save_stack+0x22/0x50 [ 40.877327] __kasan_record_aux_stack+0x8e/0xa0 [ 40.877956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.878651] remove_vma+0x139/0x170 [ 40.879152] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.879760] do_vmi_munmap+0x1f1/0x2b0 [ 40.880292] mmap_region+0x1f9/0x2660 [ 40.880814] do_mmap+0x854/0xf00 [ 40.881283] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.881807] ksys_mmap_pgoff+0x3af/0x500 [ 40.882357] do_syscall_64+0x3f/0x90 [ 40.882866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.883573] [ 40.883807] The buggy address belongs to the object at ffff88800e941000 [ 40.883807] which belongs to the cache vm_area_struct of size 168 [ 40.885728] The buggy address is located 88 bytes inside of [ 40.885728] freed 168-byte region [ffff88800e941000, ffff88800e9410a8) [ 40.887304] [ 40.887537] The buggy address belongs to the physical page: [ 40.888267] page:0000000006f38207 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe941 [ 40.889461] memcg:ffff88800dc39301 [ 40.889929] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.890638] page_type: 0xffffffff() [ 40.891138] raw: 0100000000000200 ffff88800879fc80 ffffea0000255fc0 dead000000000008 [ 40.892147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc39301 [ 40.893137] page dumped because: kasan: bad access detected [ 40.893863] [ 40.894092] Memory state around the buggy address: [ 40.894719] ffff88800e940f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 40.895671] ffff88800e940f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.896612] >ffff88800e941000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.897543] ^ [ 40.898336] ffff88800e941080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 40.899270] ffff88800e941100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.900217] ================================================================== [ 40.901272] Disabling lock debugging due to kernel taint [ 43.300669] BUG: Bad rss-counter state mm:00000000d49b4604 type:MM_FILEPAGES val:33 [ 43.302178] BUG: Bad rss-counter state mm:00000000d49b4604 type:MM_ANONPAGES val:22 [ 43.764950] BUG: Bad rss-counter state mm:00000000f5b3ec4d type:MM_FILEPAGES val:33 [ 43.766634] BUG: Bad rss-counter state mm:00000000f5b3ec4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63106' (ECDSA) to the list of known hosts. 2023/06/19 13:46:58 fuzzer started 2023/06/19 13:46:58 dialing manager at localhost:44161 2023/06/19 13:46:58 checking machine... 2023/06/19 13:46:58 checking revisions... [ 44.484341] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:46:58 testing simple program... [ 44.528075] cgroup: Unknown subsys name 'net' [ 44.573968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:46:48 Registers: info registers vcpu 0 RAX=ffff8880192de8dc RBX=0000000000000000 RCX=ffffffff81621a5e RDX=0000000000000000 RSI=0000000000000004 RDI=ffff8880192de8dc RBP=000000000000005a RSP=ffff88801822fac0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880192de8dc R13=ffff8880192de7e8 R14=ffffffff8493c2c0 R15=0000000000000b79 RIP=ffffffff8180eeb2 RFL=00000202 [-------] 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 00007f3626611700 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=00007f0ad1acd0b0 CR3=0000000015bf4000 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=2037353a36343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36343a3331203931 XMM08=672f6d65747379732f646d6574737973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100128ac13 RBX=ffff888009456068 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009456098 RBP=ffff8880143bb1a0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff8880143bb318 R14=ffffffff813782a8 R15=ffff88800eea7880 RIP=ffffffff8184636c 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=00007f10b430bca0 CR3=000000000c9c0000 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=17e44d5f1aff06bb7648f275018b22dd XMM02=ec2efd57dc4c00df000000000011ce58 XMM03=73d456df4d5acc42000000000011cf28 XMM04=44f66696802d6c4a00000000000ae988 XMM05=19e9129bd510f2350000000000135738 XMM06=faa8fae8f5284a1200000000001345a0 XMM07=e042d86d42eb936e0000000000124ac8 XMM08=73d456df4d5acc42000000000011cf28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000