syzkaller login: [ 30.885516] BUG: Bad rss-counter state mm:0000000044f61fdf type:MM_FILEPAGES val:33 [ 30.886810] BUG: Bad rss-counter state mm:0000000044f61fdf type:MM_ANONPAGES val:22 [ 31.000341] ================================================================== [ 31.001497] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.003090] Read of size 8 at addr ffff888010237a50 by task sshd/221 [ 31.004115] [ 31.004247] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.004772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.005348] Call Trace: [ 31.005534] [ 31.005696] dump_stack_lvl+0x91/0xf0 [ 31.005996] print_report+0xcc/0x620 [ 31.006292] ? __virt_addr_valid+0x102/0x340 [ 31.006625] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006999] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007361] kasan_report+0xbe/0xf0 [ 31.007652] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008029] vma_interval_tree_remove+0xc75/0xec0 [ 31.008388] vma_prepare+0xc54/0x11a0 [ 31.008674] __split_vma+0x5af/0x950 [ 31.008957] ? __pfx___split_vma+0x10/0x10 [ 31.009271] ? find_held_lock+0x2c/0x110 [ 31.009584] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.009934] ? lock_is_held_type+0x9f/0x120 [ 31.010257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.010624] ? mtree_range_walk+0x632/0x900 [ 31.010955] ? mas_walk+0x5c7/0x7c0 [ 31.011225] do_vmi_munmap+0x1f1/0x2b0 [ 31.011516] mmap_region+0x1f9/0x2660 [ 31.011832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.012135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.012556] ? __pfx_lock_acquire+0x10/0x10 [ 31.012885] ? __pfx_mmap_region+0x10/0x10 [ 31.013193] ? security_mmap_addr+0x7d/0xa0 [ 31.013507] ? get_unmapped_area+0x1f5/0x3f0 [ 31.013840] do_mmap+0x854/0xf00 [ 31.014107] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.014393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.014728] ksys_mmap_pgoff+0x3af/0x500 [ 31.015038] do_syscall_64+0x3f/0x90 [ 31.015326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.015722] RIP: 0033:0x7f6523b0ad82 [ 31.015993] 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 [ 31.017252] RSP: 002b:00007fff606c1d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.017788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6523b0ad82 [ 31.018295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6522f44000 [ 31.018806] RBP: 00007f6522f44000 R08: 0000000000000009 R09: 0000000000001000 [ 31.019320] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfd4357ec0 [ 31.019851] R13: 00007fff606c1d20 R14: 00007fff606c1d50 R15: 00007fff606c20b0 [ 31.020364] [ 31.020538] [ 31.020664] Allocated by task 214: [ 31.020928] kasan_save_stack+0x22/0x50 [ 31.021215] kasan_set_track+0x25/0x30 [ 31.021513] __kasan_slab_alloc+0x59/0x70 [ 31.021820] kmem_cache_alloc+0x16b/0x370 [ 31.022128] vm_area_dup+0x20/0x160 [ 31.022396] __split_vma+0x170/0x950 [ 31.022664] split_vma+0xc6/0x110 [ 31.022924] mprotect_fixup+0x8d2/0xb30 [ 31.023214] do_mprotect_pkey+0x87e/0xd40 [ 31.023520] __x64_sys_mprotect+0x78/0xc0 [ 31.023854] do_syscall_64+0x3f/0x90 [ 31.024130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.024504] [ 31.024630] Freed by task 19: [ 31.024859] kasan_save_stack+0x22/0x50 [ 31.025164] kasan_set_track+0x25/0x30 [ 31.025451] kasan_save_free_info+0x2b/0x50 [ 31.025769] __kasan_slab_free+0x10a/0x190 [ 31.026096] kmem_cache_free+0x10d/0x4d0 [ 31.026393] rcu_core+0x8c8/0x2860 [ 31.026657] __do_softirq+0x1b7/0x7d4 [ 31.026942] [ 31.027068] Last potentially related work creation: [ 31.027421] kasan_save_stack+0x22/0x50 [ 31.027723] __kasan_record_aux_stack+0x8e/0xa0 [ 31.028070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.028461] remove_vma+0x139/0x170 [ 31.028733] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.029067] do_vmi_munmap+0x1f1/0x2b0 [ 31.029357] __vm_munmap+0x138/0x3a0 [ 31.029627] __x64_sys_munmap+0x59/0x80 [ 31.029919] do_syscall_64+0x3f/0x90 [ 31.030195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030571] [ 31.030699] The buggy address belongs to the object at ffff8880102379f8 [ 31.030699] which belongs to the cache vm_area_struct of size 168 [ 31.031590] The buggy address is located 88 bytes inside of [ 31.031590] freed 168-byte region [ffff8880102379f8, ffff888010237aa0) [ 31.032441] [ 31.032565] The buggy address belongs to the physical page: [ 31.032965] page:000000009f85b25b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10237 [ 31.033617] memcg:ffff888019dce501 [ 31.033874] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.034259] page_type: 0xffffffff() [ 31.034535] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.035086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dce501 [ 31.035637] page dumped because: kasan: bad access detected [ 31.036045] [ 31.036169] Memory state around the buggy address: [ 31.036519] ffff888010237900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.037045] ffff888010237980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.037557] >ffff888010237a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.038068] ^ [ 31.038483] ffff888010237a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.039003] ffff888010237b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.039517] ================================================================== [ 31.040091] Disabling lock debugging due to kernel taint [ 33.038643] BUG: Bad rss-counter state mm:0000000026ef4629 type:MM_FILEPAGES val:33 [ 33.039724] BUG: Bad rss-counter state mm:0000000026ef4629 type:MM_ANONPAGES val:22 [ 33.534817] BUG: Bad rss-counter state mm:000000007de68b04 type:MM_FILEPAGES val:33 [ 33.536074] BUG: Bad rss-counter state mm:000000007de68b04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48240' (ECDSA) to the list of known hosts. 2023/06/21 01:53:06 fuzzer started 2023/06/21 01:53:06 dialing manager at localhost:36067 2023/06/21 01:53:06 checking machine... 2023/06/21 01:53:06 checking revisions... [ 34.252059] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:53:06 testing simple program... [ 34.300056] cgroup: Unknown subsys name 'net' [ 34.357278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:53:06 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fc4f901 RSI=ffff88800fc4f990 RDI=ffff88800fc4f990 RBP=ffff88800fc4f6a0 RSP=ffff88800fc4f5d8 R8 =ffffffff86138e90 R9 =ffff88800fc4f688 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800fc4f6a8 R13=ffff88800fc4f690 R14=ffff88800fc4f998 R15=ffff88800fc4f648 RIP=ffffffff81131041 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 00007fc2e92d3900 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=00007fc2e9888650 CR3=000000000e3d8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffd6b152668 CR3=0000000015d5c000 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=2036303a33353a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000