syzkaller login: [ 31.195183] BUG: Bad rss-counter state mm:0000000006f17ed7 type:MM_FILEPAGES val:33 [ 31.196343] BUG: Bad rss-counter state mm:0000000006f17ed7 type:MM_ANONPAGES val:22 [ 31.231782] ================================================================== [ 31.232824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.233906] Read of size 8 at addr ffff88801452ea50 by task sshd/221 [ 31.234760] [ 31.235040] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237148] Call Trace: [ 31.237464] <TASK> [ 31.237754] dump_stack_lvl+0x91/0xf0 [ 31.238365] print_report+0xcc/0x620 [ 31.238872] ? __virt_addr_valid+0x102/0x340 [ 31.239426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240051] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240675] kasan_report+0xbe/0xf0 [ 31.241158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.241795] vma_interval_tree_remove+0xc75/0xec0 [ 31.242401] vma_prepare+0xc54/0x11a0 [ 31.242897] __split_vma+0x5af/0x950 [ 31.243368] ? __pfx___split_vma+0x10/0x10 [ 31.243900] ? find_held_lock+0x2c/0x110 [ 31.244426] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.244999] ? lock_is_held_type+0x9f/0x120 [ 31.245537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246150] ? mtree_range_walk+0x632/0x900 [ 31.246722] ? mas_walk+0x5c7/0x7c0 [ 31.247201] do_vmi_munmap+0x1f1/0x2b0 [ 31.247691] mmap_region+0x1f9/0x2660 [ 31.248173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.248687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.249398] ? __pfx_lock_acquire+0x10/0x10 [ 31.249939] ? __pfx_mmap_region+0x10/0x10 [ 31.250474] ? security_mmap_addr+0x7d/0xa0 [ 31.251030] ? get_unmapped_area+0x1f5/0x3f0 [ 31.251578] do_mmap+0x854/0xf00 [ 31.252018] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.252516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.253081] ksys_mmap_pgoff+0x3af/0x500 [ 31.253589] do_syscall_64+0x3f/0x90 [ 31.254073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254730] RIP: 0033:0x7faf54560d82 [ 31.255195] 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 [ 31.257328] RSP: 002b:00007ffd1e714858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.258252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf54560d82 [ 31.259138] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf5399a000 [ 31.259997] RBP: 00007faf5399a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.261053] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d69e805ec0 [ 31.261913] R13: 00007ffd1e714870 R14: 00007ffd1e7148a0 R15: 00007ffd1e714c00 [ 31.262782] </TASK> [ 31.263076] [ 31.263294] Allocated by task 214: [ 31.263717] kasan_save_stack+0x22/0x50 [ 31.264227] kasan_set_track+0x25/0x30 [ 31.264720] __kasan_slab_alloc+0x59/0x70 [ 31.265242] kmem_cache_alloc+0x16b/0x370 [ 31.265756] vm_area_dup+0x20/0x160 [ 31.266210] __split_vma+0x170/0x950 [ 31.266681] split_vma+0xc6/0x110 [ 31.267129] mprotect_fixup+0x8d2/0xb30 [ 31.267636] do_mprotect_pkey+0x87e/0xd40 [ 31.268161] __x64_sys_mprotect+0x78/0xc0 [ 31.268692] do_syscall_64+0x3f/0x90 [ 31.269173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269826] [ 31.270048] Freed by task 214: [ 31.270440] kasan_save_stack+0x22/0x50 [ 31.270964] kasan_set_track+0x25/0x30 [ 31.271461] kasan_save_free_info+0x2b/0x50 [ 31.271991] __kasan_slab_free+0x10a/0x190 [ 31.272520] kmem_cache_free+0x10d/0x4d0 [ 31.273027] rcu_core+0x8c8/0x2860 [ 31.273469] __do_softirq+0x1b7/0x7d4 [ 31.273956] [ 31.274176] Last potentially related work creation: [ 31.274774] kasan_save_stack+0x22/0x50 [ 31.275275] __kasan_record_aux_stack+0x8e/0xa0 [ 31.275849] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.276492] remove_vma+0x139/0x170 [ 31.276942] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.277497] do_vmi_munmap+0x1f1/0x2b0 [ 31.277982] __vm_munmap+0x138/0x3a0 [ 31.278448] __x64_sys_munmap+0x59/0x80 [ 31.278962] do_syscall_64+0x3f/0x90 [ 31.279439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280092] [ 31.280310] The buggy address belongs to the object at ffff88801452e9f8 [ 31.280310] which belongs to the cache vm_area_struct of size 168 [ 31.281781] The buggy address is located 88 bytes inside of [ 31.281781] freed 168-byte region [ffff88801452e9f8, ffff88801452eaa0) [ 31.283203] [ 31.283421] The buggy address belongs to the physical page: [ 31.284076] page:00000000682b6d58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1452e [ 31.285167] memcg:ffff888019759301 [ 31.285601] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.286251] page_type: 0xffffffff() [ 31.286712] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.287633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019759301 [ 31.288538] page dumped because: kasan: bad access detected [ 31.289216] [ 31.289435] Memory state around the buggy address: [ 31.290009] ffff88801452e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.290884] ffff88801452e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.291736] >ffff88801452ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.292585] ^ [ 31.293276] ffff88801452ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.294129] ffff88801452eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295001] ================================================================== [ 31.296033] Disabling lock debugging due to kernel taint [ 33.982046] BUG: Bad rss-counter state mm:00000000e99c9c39 type:MM_FILEPAGES val:33 [ 33.983051] BUG: Bad rss-counter state mm:00000000e99c9c39 type:MM_ANONPAGES val:22 [ 34.576478] BUG: Bad rss-counter state mm:00000000fa605346 type:MM_FILEPAGES val:33 [ 34.577629] BUG: Bad rss-counter state mm:00000000fa605346 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3767' (ECDSA) to the list of known hosts. 2023/06/21 05:13:41 fuzzer started 2023/06/21 05:13:41 dialing manager at localhost:36067 2023/06/21 05:13:41 checking machine... 2023/06/21 05:13:41 checking revisions... [ 35.208410] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:13:41 testing simple program... [ 35.258592] cgroup: Unknown subsys name 'net' [ 35.302705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:13:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd1d1b4988 CR3=000000000eab0000 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=2030343a33313a3530203132206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a303532383520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33313a3530203132 XMM08=3d656e696c646d632022656369767265 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=00007f53424a45a0 CR3=0000000013a4e000 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=9f226b2f0cf386926a4b09dc9a089100 XMM02=000000000011a4f8eff9b2d0a8fce9cb XMM03=000000000011a5c82c67c8bc2e329bc3 XMM04=9ff578bae5826e3400000000000ae988 XMM05=64c6f2794b8a862000000000001328e0 XMM06=c291bd5c70af25b900000000001316d0 XMM07=fb795ef6d65770560000000000121a08 XMM08=2c67c8bc2e329bc3000000000011a568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000