syzkaller login: [ 38.808532] BUG: Bad rss-counter state mm:000000007166f1cb type:MM_FILEPAGES val:33 [ 38.809699] BUG: Bad rss-counter state mm:000000007166f1cb type:MM_ANONPAGES val:22 [ 38.967311] ================================================================== [ 38.968237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.969206] Read of size 8 at addr ffff88800e111140 by task sshd/218 [ 38.970007] [ 38.970229] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.971255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.972245] Call Trace: [ 38.972565] [ 38.972860] dump_stack_lvl+0x91/0xf0 [ 38.973363] print_report+0xcc/0x620 [ 38.973881] ? __virt_addr_valid+0x102/0x340 [ 38.974438] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.975063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.975693] kasan_report+0xbe/0xf0 [ 38.976315] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976928] vma_interval_tree_remove+0xc75/0xec0 [ 38.977536] vma_prepare+0xc54/0x11a0 [ 38.978007] __split_vma+0x5af/0x950 [ 38.978473] ? __pfx___split_vma+0x10/0x10 [ 38.978994] ? find_held_lock+0x2c/0x110 [ 38.979509] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.980067] ? lock_is_held_type+0x9f/0x120 [ 38.980601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.981203] ? mtree_range_walk+0x632/0x900 [ 38.981786] ? mas_walk+0x5c7/0x7c0 [ 38.982253] do_vmi_munmap+0x1f1/0x2b0 [ 38.982746] mmap_region+0x1f9/0x2660 [ 38.983220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.983729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.984438] ? __pfx_lock_acquire+0x10/0x10 [ 38.984960] ? __pfx_mmap_region+0x10/0x10 [ 38.985494] ? security_mmap_addr+0x7d/0xa0 [ 38.986018] ? get_unmapped_area+0x1f5/0x3f0 [ 38.986563] do_mmap+0x854/0xf00 [ 38.986997] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.987487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.988047] ksys_mmap_pgoff+0x3af/0x500 [ 38.988550] do_syscall_64+0x3f/0x90 [ 38.989026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989688] RIP: 0033:0x7f9b2a258d82 [ 38.990140] 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 [ 38.992229] RSP: 002b:00007ffdb87b0008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.993125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b2a258d82 [ 38.993989] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b29692000 [ 38.994828] RBP: 00007f9b29692000 R08: 0000000000000009 R09: 0000000000001000 [ 38.995678] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df48d8dec0 [ 38.996517] R13: 00007ffdb87b0020 R14: 00007ffdb87b0050 R15: 00007ffdb87b03b0 [ 38.997380] [ 38.997677] [ 38.997896] Allocated by task 211: [ 38.998322] kasan_save_stack+0x22/0x50 [ 38.998819] kasan_set_track+0x25/0x30 [ 38.999312] __kasan_slab_alloc+0x59/0x70 [ 38.999834] kmem_cache_alloc+0x16b/0x370 [ 39.000345] vm_area_dup+0x20/0x160 [ 39.000796] __split_vma+0x170/0x950 [ 39.001258] split_vma+0xc6/0x110 [ 39.001711] mprotect_fixup+0x8d2/0xb30 [ 39.002214] do_mprotect_pkey+0x87e/0xd40 [ 39.002732] __x64_sys_mprotect+0x78/0xc0 [ 39.003248] do_syscall_64+0x3f/0x90 [ 39.003716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.004351] [ 39.004563] Freed by task 211: [ 39.004951] kasan_save_stack+0x22/0x50 [ 39.005461] kasan_set_track+0x25/0x30 [ 39.005953] kasan_save_free_info+0x2b/0x50 [ 39.006481] __kasan_slab_free+0x10a/0x190 [ 39.007013] kmem_cache_free+0x10d/0x4d0 [ 39.007514] rcu_core+0x8c8/0x2860 [ 39.007952] __do_softirq+0x1b7/0x7d4 [ 39.008428] [ 39.008642] Last potentially related work creation: [ 39.009224] kasan_save_stack+0x22/0x50 [ 39.009737] __kasan_record_aux_stack+0x8e/0xa0 [ 39.010310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.010956] remove_vma+0x139/0x170 [ 39.011402] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.012009] do_vmi_munmap+0x1f1/0x2b0 [ 39.012492] __vm_munmap+0x138/0x3a0 [ 39.012956] __x64_sys_munmap+0x59/0x80 [ 39.013460] do_syscall_64+0x3f/0x90 [ 39.013932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.014571] [ 39.014789] Second to last potentially related work creation: [ 39.015467] kasan_save_stack+0x22/0x50 [ 39.015968] __kasan_record_aux_stack+0x8e/0xa0 [ 39.016537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.017171] remove_vma+0x139/0x170 [ 39.017636] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.018188] do_vmi_munmap+0x1f1/0x2b0 [ 39.018670] mmap_region+0x1f9/0x2660 [ 39.019144] do_mmap+0x854/0xf00 [ 39.019576] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.020061] ksys_mmap_pgoff+0x3af/0x500 [ 39.020558] do_syscall_64+0x3f/0x90 [ 39.021031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021679] [ 39.021896] The buggy address belongs to the object at ffff88800e1110e8 [ 39.021896] which belongs to the cache vm_area_struct of size 168 [ 39.023353] The buggy address is located 88 bytes inside of [ 39.023353] freed 168-byte region [ffff88800e1110e8, ffff88800e111190) [ 39.024741] [ 39.024956] The buggy address belongs to the physical page: [ 39.025625] page:000000001e3decc7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe111 [ 39.026696] memcg:ffff88800e81e001 [ 39.027119] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.027756] page_type: 0xffffffff() [ 39.028203] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.029108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e81e001 [ 39.030018] page dumped because: kasan: bad access detected [ 39.030671] [ 39.030883] Memory state around the buggy address: [ 39.031463] ffff88800e111000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.032312] ffff88800e111080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.033163] >ffff88800e111100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.034020] ^ [ 39.034655] ffff88800e111180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.035513] ffff88800e111200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.036353] ================================================================== [ 39.037293] Disabling lock debugging due to kernel taint [ 40.966813] BUG: Bad rss-counter state mm:000000005c0ee71b type:MM_FILEPAGES val:33 [ 40.967634] BUG: Bad rss-counter state mm:000000005c0ee71b type:MM_ANONPAGES val:22 [ 41.481653] BUG: Bad rss-counter state mm:00000000ef337da3 type:MM_FILEPAGES val:33 [ 41.482665] BUG: Bad rss-counter state mm:00000000ef337da3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24044' (ECDSA) to the list of known hosts. 2023/06/20 20:13:37 fuzzer started 2023/06/20 20:13:37 dialing manager at localhost:36067 2023/06/20 20:13:37 checking machine... 2023/06/20 20:13:37 checking revisions... [ 42.254597] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:13:38 testing simple program... [ 42.309903] cgroup: Unknown subsys name 'net' [ 42.360565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:13:37 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09b38 RDI=ffff88806ce09aa8 RBP=ffff88806ce09b38 RSP=ffff88806ce099b0 R8 =ffffffff8608a55a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff811304ce RFL=00000282 [--S----] 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 00007fa05763a700 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=00007fe5464e80b0 CR3=0000000006b60000 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=2037333a33313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33313a3032203032 XMM08=755f6d65747379733d6a627573203539 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000019dba RCX=00000000000000ff RDX=0000000000000200 RSI=00000000000000ff RDI=ffffed10033b7400 RBP=0000000000000000 RSP=ffff888006a87760 R8 =0000000000000000 R9 =fffff940000cedd6 R10=ffffed10033b7400 R11=00000000000b6d53 R12=0000000000000000 R13=ffffffff852c61f8 R14=ffffffff852c61e8 R15=ffffea0000676e80 RIP=ffffffff845133db RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe581ad6900 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=00007fe580f40160 CR3=0000000008eb2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fbb8e2d71895ddcb00000000000ae988 XMM05=1f6376d98bf7e8a30000000000134b18 XMM06=751b9502027dc0b90000000000132f28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000