syzkaller login: [ 38.772063] BUG: Bad rss-counter state mm:00000000baeea6bb type:MM_FILEPAGES val:33 [ 38.773087] BUG: Bad rss-counter state mm:00000000baeea6bb type:MM_ANONPAGES val:22 [ 38.966431] ================================================================== [ 38.967460] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.968567] Read of size 8 at addr ffff88800e51ca50 by task sshd/219 [ 38.969563] [ 38.969811] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.970783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.971884] Call Trace: [ 38.972257] [ 38.972579] dump_stack_lvl+0x91/0xf0 [ 38.973134] print_report+0xcc/0x620 [ 38.973682] ? __virt_addr_valid+0x102/0x340 [ 38.974306] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.974995] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.975684] kasan_report+0xbe/0xf0 [ 38.976243] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976983] vma_interval_tree_remove+0xc75/0xec0 [ 38.977707] vma_prepare+0xc54/0x11a0 [ 38.978286] __split_vma+0x5af/0x950 [ 38.978842] ? __pfx___split_vma+0x10/0x10 [ 38.979471] ? find_held_lock+0x2c/0x110 [ 38.980121] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.980794] ? lock_is_held_type+0x9f/0x120 [ 38.981436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.982147] ? mtree_range_walk+0x632/0x900 [ 38.982801] ? mas_walk+0x5c7/0x7c0 [ 38.983360] do_vmi_munmap+0x1f1/0x2b0 [ 38.983944] mmap_region+0x1f9/0x2660 [ 38.984512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.985120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.985953] ? __pfx_lock_acquire+0x10/0x10 [ 38.986572] ? __pfx_mmap_region+0x10/0x10 [ 38.987204] ? security_mmap_addr+0x7d/0xa0 [ 38.987832] ? get_unmapped_area+0x1f5/0x3f0 [ 38.988476] do_mmap+0x854/0xf00 [ 38.988989] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.989569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.990220] ksys_mmap_pgoff+0x3af/0x500 [ 38.990835] do_syscall_64+0x3f/0x90 [ 38.991356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.992096] RIP: 0033:0x7f72b4e81d82 [ 38.992589] 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 [ 38.994996] RSP: 002b:00007ffcb3f11da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.996101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72b4e81d82 [ 38.997114] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72b42bb000 [ 38.998137] RBP: 00007f72b42bb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.999144] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617b9820ec0 [ 39.000174] R13: 00007ffcb3f11dc0 R14: 00007ffcb3f11df0 R15: 00007ffcb3f12150 [ 39.001197] [ 39.001539] [ 39.001810] Allocated by task 212: [ 39.002306] kasan_save_stack+0x22/0x50 [ 39.002915] kasan_set_track+0x25/0x30 [ 39.003493] __kasan_slab_alloc+0x59/0x70 [ 39.004147] kmem_cache_alloc+0x16b/0x370 [ 39.004761] vm_area_dup+0x20/0x160 [ 39.005299] __split_vma+0x170/0x950 [ 39.005864] split_vma+0xc6/0x110 [ 39.006393] mprotect_fixup+0x8d2/0xb30 [ 39.006984] do_mprotect_pkey+0x87e/0xd40 [ 39.007588] __x64_sys_mprotect+0x78/0xc0 [ 39.008226] do_syscall_64+0x3f/0x90 [ 39.008774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.009489] [ 39.009734] Freed by task 212: [ 39.010177] kasan_save_stack+0x22/0x50 [ 39.010746] kasan_set_track+0x25/0x30 [ 39.011296] kasan_save_free_info+0x2b/0x50 [ 39.011908] __kasan_slab_free+0x10a/0x190 [ 39.012526] kmem_cache_free+0x10d/0x4d0 [ 39.013103] rcu_core+0x8c8/0x2860 [ 39.013595] __do_softirq+0x1b7/0x7d4 [ 39.014146] [ 39.014387] Last potentially related work creation: [ 39.015053] kasan_save_stack+0x22/0x50 [ 39.015610] __kasan_record_aux_stack+0x8e/0xa0 [ 39.016287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.017016] remove_vma+0x139/0x170 [ 39.017517] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.018147] do_vmi_munmap+0x1f1/0x2b0 [ 39.018686] __vm_munmap+0x138/0x3a0 [ 39.019216] __x64_sys_munmap+0x59/0x80 [ 39.019781] do_syscall_64+0x3f/0x90 [ 39.020341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021076] [ 39.021315] Second to last potentially related work creation: [ 39.022086] kasan_save_stack+0x22/0x50 [ 39.022646] __kasan_record_aux_stack+0x8e/0xa0 [ 39.023288] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.024027] remove_vma+0x139/0x170 [ 39.024531] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.025162] do_vmi_munmap+0x1f1/0x2b0 [ 39.025700] mmap_region+0x1f9/0x2660 [ 39.026246] do_mmap+0x854/0xf00 [ 39.026732] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.027287] ksys_mmap_pgoff+0x3af/0x500 [ 39.027856] do_syscall_64+0x3f/0x90 [ 39.028393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.029111] [ 39.029349] The buggy address belongs to the object at ffff88800e51c9f8 [ 39.029349] which belongs to the cache vm_area_struct of size 168 [ 39.030976] The buggy address is located 88 bytes inside of [ 39.030976] freed 168-byte region [ffff88800e51c9f8, ffff88800e51caa0) [ 39.032621] [ 39.032894] The buggy address belongs to the physical page: [ 39.033658] page:00000000a560a876 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe51c [ 39.034930] memcg:ffff88800e22d001 [ 39.035425] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.036259] page_type: 0xffffffff() [ 39.036796] raw: 0100000000000200 ffff8880087a0c80 ffffea00003946c0 dead000000000005 [ 39.037871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e22d001 [ 39.038932] page dumped because: kasan: bad access detected [ 39.039692] [ 39.039966] Memory state around the buggy address: [ 39.040625] ffff88800e51c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.041576] ffff88800e51c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.042609] >ffff88800e51ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.043620] ^ [ 39.044485] ffff88800e51ca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 39.045492] ffff88800e51cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.046486] ================================================================== [ 39.047792] Disabling lock debugging due to kernel taint [ 41.108974] BUG: Bad rss-counter state mm:00000000f8ce9d0e type:MM_FILEPAGES val:33 [ 41.110118] BUG: Bad rss-counter state mm:00000000f8ce9d0e type:MM_ANONPAGES val:22 [ 41.527787] BUG: Bad rss-counter state mm:000000004c3d8381 type:MM_FILEPAGES val:33 [ 41.529406] BUG: Bad rss-counter state mm:000000004c3d8381 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40969' (ECDSA) to the list of known hosts. 2023/06/20 20:56:13 fuzzer started 2023/06/20 20:56:13 dialing manager at localhost:36067 2023/06/20 20:56:13 checking machine... 2023/06/20 20:56:13 checking revisions... [ 42.303121] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:56:13 testing simple program... [ 42.359107] cgroup: Unknown subsys name 'net' [ 42.404186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:56:13 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dce0000 RSI=ffffffff81668e9c RDI=ffffea000076cd00 RBP=ffffea000076cd00 RSP=ffff888015b57ce0 R8 =0000000000000007 R9 =0000000000002000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801cdd4ae0 R13=ffff88800845ae40 R14=ffff88800845b330 R15=800000001db34067 RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 00007fe163fce900 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=000055cbdb3a5018 CR3=000000000df7e000 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=2033313a36353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a36353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613961f RBX=0000000000000002 RCX=ffffffff8613961e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ab8 RSP=ffff88806cf099f0 R8 =ffffffff86139622 R9 =ffff88806cf09aa0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09ac0 R13=ffff88806cf09aa8 R14=ffff88806cf09db0 R15=ffff88806cf09a60 RIP=ffffffff81130b99 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 00007fc37399d900 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=00007fc373f54618 CR3=00000000181e8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000