syzkaller login: [ 161.143072] BUG: Bad rss-counter state mm:00000000b2d989dd type:MM_FILEPAGES val:33 [ 161.144300] BUG: Bad rss-counter state mm:00000000b2d989dd type:MM_ANONPAGES val:22 [ 161.289160] ================================================================== [ 161.290125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 161.291591] Read of size 8 at addr ffff88800d856c20 by task sshd/220 [ 161.292495] [ 161.292760] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 161.293979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 161.295139] Call Trace: [ 161.295512] [ 161.295847] dump_stack_lvl+0x91/0xf0 [ 161.296421] print_report+0xcc/0x620 [ 161.296990] ? __virt_addr_valid+0x102/0x340 [ 161.297628] ? vma_interval_tree_remove+0xc75/0xec0 [ 161.298358] ? vma_interval_tree_remove+0xc75/0xec0 [ 161.299124] kasan_report+0xbe/0xf0 [ 161.299694] ? vma_interval_tree_remove+0xc75/0xec0 [ 161.300463] vma_interval_tree_remove+0xc75/0xec0 [ 161.301218] vma_prepare+0xc54/0x11a0 [ 161.301819] __split_vma+0x5af/0x950 [ 161.302415] ? __pfx___split_vma+0x10/0x10 [ 161.303083] ? find_held_lock+0x2c/0x110 [ 161.303728] do_vmi_align_munmap+0x2ba/0x11f0 [ 161.304440] ? lock_is_held_type+0x9f/0x120 [ 161.305113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 161.305858] ? mtree_range_walk+0x632/0x900 [ 161.306533] ? mas_walk+0x5c7/0x7c0 [ 161.307159] do_vmi_munmap+0x1f1/0x2b0 [ 161.307760] mmap_region+0x1f9/0x2660 [ 161.308243] ? vm_mmap_pgoff+0x15c/0x3a0 [ 161.308749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 161.309461] ? __pfx_lock_acquire+0x10/0x10 [ 161.309990] ? __pfx_mmap_region+0x10/0x10 [ 161.310525] ? security_mmap_addr+0x7d/0xa0 [ 161.311065] ? get_unmapped_area+0x1f5/0x3f0 [ 161.311611] do_mmap+0x854/0xf00 [ 161.312036] vm_mmap_pgoff+0x1a6/0x3a0 [ 161.312522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 161.313079] ksys_mmap_pgoff+0x3af/0x500 [ 161.313589] do_syscall_64+0x3f/0x90 [ 161.314065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.314709] RIP: 0033:0x7f986533ed82 [ 161.315200] 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 [ 161.317294] RSP: 002b:00007fffc84e5268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 161.318196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f986533ed82 [ 161.319045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9864778000 [ 161.319887] RBP: 00007f9864778000 R08: 0000000000000009 R09: 0000000000001000 [ 161.320705] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae56f5ff70 [ 161.321544] R13: 00007fffc84e5280 R14: 00007fffc84e52b0 R15: 00007fffc84e5610 [ 161.322409] [ 161.322709] [ 161.322930] Allocated by task 213: [ 161.323372] kasan_save_stack+0x22/0x50 [ 161.323882] kasan_set_track+0x25/0x30 [ 161.324378] __kasan_slab_alloc+0x59/0x70 [ 161.324901] kmem_cache_alloc+0x16b/0x370 [ 161.325420] vm_area_dup+0x20/0x160 [ 161.325878] __split_vma+0x170/0x950 [ 161.326354] split_vma+0xc6/0x110 [ 161.326803] mprotect_fixup+0x8d2/0xb30 [ 161.327335] do_mprotect_pkey+0x87e/0xd40 [ 161.327875] __x64_sys_mprotect+0x78/0xc0 [ 161.328406] do_syscall_64+0x3f/0x90 [ 161.328889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.329530] [ 161.329750] Freed by task 203: [ 161.330146] kasan_save_stack+0x22/0x50 [ 161.330658] kasan_set_track+0x25/0x30 [ 161.331258] kasan_save_free_info+0x2b/0x50 [ 161.331828] __kasan_slab_free+0x10a/0x190 [ 161.332397] kmem_cache_free+0x10d/0x4d0 [ 161.332938] rcu_core+0x8c8/0x2860 [ 161.333410] __do_softirq+0x1b7/0x7d4 [ 161.333916] [ 161.334142] Last potentially related work creation: [ 161.334772] kasan_save_stack+0x22/0x50 [ 161.335323] __kasan_record_aux_stack+0x8e/0xa0 [ 161.335934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 161.336616] remove_vma+0x139/0x170 [ 161.337086] do_vmi_align_munmap+0xd4a/0x11f0 [ 161.337684] do_vmi_munmap+0x1f1/0x2b0 [ 161.338200] __vm_munmap+0x138/0x3a0 [ 161.338689] __x64_sys_munmap+0x59/0x80 [ 161.339227] do_syscall_64+0x3f/0x90 [ 161.339728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.340424] [ 161.340653] Second to last potentially related work creation: [ 161.341381] kasan_save_stack+0x22/0x50 [ 161.341920] __kasan_record_aux_stack+0x8e/0xa0 [ 161.342533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 161.343226] remove_vma+0x139/0x170 [ 161.343705] do_vmi_align_munmap+0xd4a/0x11f0 [ 161.344302] do_vmi_munmap+0x1f1/0x2b0 [ 161.344830] mmap_region+0x1f9/0x2660 [ 161.345342] do_mmap+0x854/0xf00 [ 161.345803] vm_mmap_pgoff+0x1a6/0x3a0 [ 161.346325] ksys_mmap_pgoff+0x3af/0x500 [ 161.346843] do_syscall_64+0x3f/0x90 [ 161.347348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 161.348025] [ 161.348250] The buggy address belongs to the object at ffff88800d856bc8 [ 161.348250] which belongs to the cache vm_area_struct of size 168 [ 161.349829] The buggy address is located 88 bytes inside of [ 161.349829] freed 168-byte region [ffff88800d856bc8, ffff88800d856c70) [ 161.351353] [ 161.351582] The buggy address belongs to the physical page: [ 161.352287] page:00000000ec9e165f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd856 [ 161.353446] memcg:ffff88800de7a501 [ 161.353901] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 161.354650] page_type: 0xffffffff() [ 161.355144] raw: 0100000000000200 ffff88800879fc80 ffffea000039b140 dead000000000003 [ 161.356137] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de7a501 [ 161.357118] page dumped because: kasan: bad access detected [ 161.357826] [ 161.358053] Memory state around the buggy address: [ 161.358669] ffff88800d856b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 161.359608] ffff88800d856b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 161.360532] >ffff88800d856c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 161.361438] ^ [ 161.362007] ffff88800d856c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 161.362921] ffff88800d856d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 161.363828] ================================================================== [ 161.364864] Disabling lock debugging due to kernel taint [ 163.323064] BUG: Bad rss-counter state mm:000000005ba98730 type:MM_FILEPAGES val:33 [ 163.324230] BUG: Bad rss-counter state mm:000000005ba98730 type:MM_ANONPAGES val:22 [ 163.830775] BUG: Bad rss-counter state mm:000000005af3ab8d type:MM_FILEPAGES val:33 [ 163.832107] BUG: Bad rss-counter state mm:000000005af3ab8d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12412' (ECDSA) to the list of known hosts. 2023/06/20 02:13:18 fuzzer started 2023/06/20 02:13:18 dialing manager at localhost:44161 2023/06/20 02:13:18 checking machine... 2023/06/20 02:13:18 checking revisions... [ 164.568425] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:13:18 testing simple program... [ 164.626334] cgroup: Unknown subsys name 'net' [ 164.673972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:38 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000b8c1d68c RCX=ffff88806c4eb460 RDX=000000000000000e RSI=0000000000000001 RDI=0000000025ea6427 RBP=ffff888009793600 RSP=ffff88801595f460 R8 =000000002f222125 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801595f4c8 R15=000000000000000e RIP=ffffffff82270f13 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 00007f57fdfb7900 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=00007f57fe56e618 CR3=000000001be02000 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=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 info registers vcpu 1 RAX=1ffff11001e61883 RBX=ffff88800f30c400 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff844d4cdc RDI=ffff88800f30c418 RBP=ffff88806cf2c250 RSP=ffff88806cf09de0 R8 =0000000000000006 R9 =ffff88806cf2c250 R10=ffff88806cf2c250 R11=ffff88806cf09ff8 R12=dffffc0000000000 R13=000000261b227400 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff844d4cec RFL=00000046 [---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 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=00007f3e9794aa70 CR3=000000000dc2a000 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=2038313a33313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a33313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000