syzkaller login: [ 31.867754] BUG: Bad rss-counter state mm:000000002cef5530 type:MM_FILEPAGES val:33 [ 31.868918] BUG: Bad rss-counter state mm:000000002cef5530 type:MM_ANONPAGES val:22 [ 32.011802] ================================================================== [ 32.012761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.013733] Read of size 8 at addr ffff88800dcbbc20 by task sshd/220 [ 32.014506] [ 32.014754] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.015757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.016768] Call Trace: [ 32.017088] [ 32.017429] dump_stack_lvl+0x91/0xf0 [ 32.017962] print_report+0xcc/0x620 [ 32.018456] ? __virt_addr_valid+0x102/0x340 [ 32.019066] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.019706] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.020338] kasan_report+0xbe/0xf0 [ 32.020846] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.021479] vma_interval_tree_remove+0xc75/0xec0 [ 32.022121] vma_prepare+0xc54/0x11a0 [ 32.022643] __split_vma+0x5af/0x950 [ 32.023132] ? __pfx___split_vma+0x10/0x10 [ 32.023690] ? find_held_lock+0x2c/0x110 [ 32.024217] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.024805] ? lock_is_held_type+0x9f/0x120 [ 32.025349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.025989] ? mtree_range_walk+0x632/0x900 [ 32.026574] ? mas_walk+0x5c7/0x7c0 [ 32.027070] do_vmi_munmap+0x1f1/0x2b0 [ 32.027566] mmap_region+0x1f9/0x2660 [ 32.028070] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.028584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.029325] ? __pfx_lock_acquire+0x10/0x10 [ 32.029898] ? __pfx_mmap_region+0x10/0x10 [ 32.030433] ? security_mmap_addr+0x7d/0xa0 [ 32.031002] ? get_unmapped_area+0x1f5/0x3f0 [ 32.031554] do_mmap+0x854/0xf00 [ 32.032014] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.032510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.033092] ksys_mmap_pgoff+0x3af/0x500 [ 32.033619] do_syscall_64+0x3f/0x90 [ 32.034114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.034812] RIP: 0033:0x7fe740b7dd82 [ 32.035276] 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 [ 32.037427] RSP: 002b:00007fffec953f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.038374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe740b7dd82 [ 32.039255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe73ffb7000 [ 32.040129] RBP: 00007fe73ffb7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.040995] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617ff365d90 [ 32.041873] R13: 00007fffec953f60 R14: 00007fffec953f90 R15: 00007fffec9542f0 [ 32.042769] [ 32.043064] [ 32.043283] Allocated by task 213: [ 32.043739] kasan_save_stack+0x22/0x50 [ 32.044250] kasan_set_track+0x25/0x30 [ 32.044765] __kasan_slab_alloc+0x59/0x70 [ 32.045296] kmem_cache_alloc+0x16b/0x370 [ 32.045852] vm_area_dup+0x20/0x160 [ 32.046311] __split_vma+0x170/0x950 [ 32.046821] split_vma+0xc6/0x110 [ 32.047272] mprotect_fixup+0x8d2/0xb30 [ 32.047801] do_mprotect_pkey+0x87e/0xd40 [ 32.048330] __x64_sys_mprotect+0x78/0xc0 [ 32.048869] do_syscall_64+0x3f/0x90 [ 32.049356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.050032] [ 32.050251] Freed by task 213: [ 32.050678] kasan_save_stack+0x22/0x50 [ 32.051196] kasan_set_track+0x25/0x30 [ 32.051712] kasan_save_free_info+0x2b/0x50 [ 32.052258] __kasan_slab_free+0x10a/0x190 [ 32.052810] kmem_cache_free+0x10d/0x4d0 [ 32.053319] rcu_core+0x8c8/0x2860 [ 32.053799] __do_softirq+0x1b7/0x7d4 [ 32.054278] [ 32.054497] Last potentially related work creation: [ 32.055155] kasan_save_stack+0x22/0x50 [ 32.055677] __kasan_record_aux_stack+0x8e/0xa0 [ 32.056323] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.056986] remove_vma+0x139/0x170 [ 32.057450] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.058042] do_vmi_munmap+0x1f1/0x2b0 [ 32.058548] __vm_munmap+0x138/0x3a0 [ 32.059048] __x64_sys_munmap+0x59/0x80 [ 32.059546] do_syscall_64+0x3f/0x90 [ 32.060048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.060715] [ 32.060934] The buggy address belongs to the object at ffff88800dcbbbc8 [ 32.060934] which belongs to the cache vm_area_struct of size 168 [ 32.062428] The buggy address is located 88 bytes inside of [ 32.062428] freed 168-byte region [ffff88800dcbbbc8, ffff88800dcbbc70) [ 32.063893] [ 32.064110] The buggy address belongs to the physical page: [ 32.064783] page:0000000029a5983c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcbb [ 32.065909] memcg:ffff88800e745401 [ 32.066337] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.067009] page_type: 0xffffffff() [ 32.067467] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.068405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e745401 [ 32.069334] page dumped because: kasan: bad access detected [ 32.070034] [ 32.070251] Memory state around the buggy address: [ 32.070869] ffff88800dcbbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.071744] ffff88800dcbbb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.072613] >ffff88800dcbbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.073478] ^ [ 32.074032] ffff88800dcbbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.074925] ffff88800dcbbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.075796] ================================================================== [ 32.076764] Disabling lock debugging due to kernel taint [ 34.056716] BUG: Bad rss-counter state mm:00000000cf5b651d type:MM_FILEPAGES val:33 [ 34.057873] BUG: Bad rss-counter state mm:00000000cf5b651d type:MM_ANONPAGES val:22 [ 34.517971] BUG: Bad rss-counter state mm:000000002ba13f9e type:MM_FILEPAGES val:33 [ 34.518976] BUG: Bad rss-counter state mm:000000002ba13f9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35170' (ECDSA) to the list of known hosts. 2023/06/19 13:26:30 fuzzer started 2023/06/19 13:26:31 dialing manager at localhost:44161 2023/06/19 13:26:31 checking machine... 2023/06/19 13:26:31 checking revisions... [ 35.268929] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:26:31 testing simple program... [ 35.317612] cgroup: Unknown subsys name 'net' [ 35.373178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:26:30 Registers: info registers vcpu 0 RAX=1ffffffff0a5883f RBX=ffff88808e302000 RCX=1ffff11001dd8d7b RDX=dffffc0000000000 RSI=0000000000000000 RDI=000000000e302000 RBP=0000000000000000 RSP=ffff88800e0c79e8 R8 =ffff88800eec6bd8 R9 =ffffed1001dd8d7c R10=ffff88800eec6be7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000020 R15=00000000000000b5 RIP=ffffffff81143993 RFL=00000007 [-----PC] 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 00007fab723af700 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=00007fd510974618 CR3=0000000015c48000 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=2030333a36323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a36323a3331203931 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7645583000 CR3=000000000ef94000 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=07dadf83f70009917840034d0ec0a94c XMM02=2c67c8bc2e329bc3000000000011cbd8 XMM03=fb795ef6d65770560000000000124040 XMM04=3951f31a347e6de300000000000ae988 XMM05=19e9129bd510f2350000000000133c30 XMM06=4fda316b135da52b0000000000133ab8 XMM07=e042d86d42eb936e00000000001242c0 XMM08=7280125c2939f051000000000011cc38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000