syzkaller login: [ 30.218474] BUG: Bad rss-counter state mm:0000000082c08248 type:MM_FILEPAGES val:33 [ 30.219200] BUG: Bad rss-counter state mm:0000000082c08248 type:MM_ANONPAGES val:22 [ 30.372028] ================================================================== [ 30.373807] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.375663] Read of size 8 at addr ffff88801b016140 by task sshd/221 [ 30.377122] [ 30.377513] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.379109] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.386696] Call Trace: [ 30.387291] [ 30.387773] dump_stack_lvl+0x91/0xf0 [ 30.388630] print_report+0xcc/0x620 [ 30.389506] ? __virt_addr_valid+0x102/0x340 [ 30.394674] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.395758] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.396802] kasan_report+0xbe/0xf0 [ 30.397688] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.398925] vma_interval_tree_remove+0xc75/0xec0 [ 30.400001] vma_prepare+0xc54/0x11a0 [ 30.400905] __split_vma+0x5af/0x950 [ 30.401717] ? __pfx___split_vma+0x10/0x10 [ 30.402702] ? find_held_lock+0x2c/0x110 [ 30.403581] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.404545] ? lock_is_held_type+0x9f/0x120 [ 30.405456] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.406613] ? mtree_range_walk+0x632/0x900 [ 30.407657] ? mas_walk+0x5c7/0x7c0 [ 30.408507] do_vmi_munmap+0x1f1/0x2b0 [ 30.409404] mmap_region+0x1f9/0x2660 [ 30.410203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.411088] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.412324] ? __pfx_lock_acquire+0x10/0x10 [ 30.413259] ? __pfx_mmap_region+0x10/0x10 [ 30.414149] ? security_mmap_addr+0x7d/0xa0 [ 30.415063] ? get_unmapped_area+0x1f5/0x3f0 [ 30.415966] do_mmap+0x854/0xf00 [ 30.416697] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.417637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.418783] ksys_mmap_pgoff+0x3af/0x500 [ 30.419772] do_syscall_64+0x3f/0x90 [ 30.420752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.422046] RIP: 0033:0x7fb995b55d82 [ 30.422990] 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 [ 30.427567] RSP: 002b:00007ffe15927858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.429471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb995b55d82 [ 30.431247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb994f8f000 [ 30.432854] RBP: 00007fb994f8f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.434642] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a83343af60 [ 30.436350] R13: 00007ffe15927870 R14: 00007ffe159278a0 R15: 00007ffe15927c00 [ 30.437930] [ 30.438468] [ 30.438807] Allocated by task 214: [ 30.439126] kasan_save_stack+0x22/0x50 [ 30.439510] kasan_set_track+0x25/0x30 [ 30.439847] __kasan_slab_alloc+0x59/0x70 [ 30.440194] kmem_cache_alloc+0x16b/0x370 [ 30.440556] vm_area_dup+0x20/0x160 [ 30.440863] __split_vma+0x170/0x950 [ 30.441187] split_vma+0xc6/0x110 [ 30.441492] mprotect_fixup+0x8d2/0xb30 [ 30.441830] do_mprotect_pkey+0x87e/0xd40 [ 30.442183] __x64_sys_mprotect+0x78/0xc0 [ 30.442560] do_syscall_64+0x3f/0x90 [ 30.442885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.443323] [ 30.443472] Freed by task 13: [ 30.443731] kasan_save_stack+0x22/0x50 [ 30.444076] kasan_set_track+0x25/0x30 [ 30.444427] kasan_save_free_info+0x2b/0x50 [ 30.444792] __kasan_slab_free+0x10a/0x190 [ 30.445157] kmem_cache_free+0x10d/0x4d0 [ 30.445511] rcu_core+0x8c8/0x2860 [ 30.445815] __do_softirq+0x1b7/0x7d4 [ 30.446148] [ 30.446301] Last potentially related work creation: [ 30.446821] kasan_save_stack+0x22/0x50 [ 30.447163] __kasan_record_aux_stack+0x8e/0xa0 [ 30.447599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.448032] remove_vma+0x139/0x170 [ 30.448357] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.448737] do_vmi_munmap+0x1f1/0x2b0 [ 30.449068] __vm_munmap+0x138/0x3a0 [ 30.449391] __x64_sys_munmap+0x59/0x80 [ 30.449710] do_syscall_64+0x3f/0x90 [ 30.450010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.450429] [ 30.450565] The buggy address belongs to the object at ffff88801b0160e8 [ 30.450565] which belongs to the cache vm_area_struct of size 168 [ 30.451481] The buggy address is located 88 bytes inside of [ 30.451481] freed 168-byte region [ffff88801b0160e8, ffff88801b016190) [ 30.452355] [ 30.452491] The buggy address belongs to the physical page: [ 30.452898] page:00000000e2eed6c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b016 [ 30.453578] memcg:ffff88801a3f6501 [ 30.453857] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.454293] page_type: 0xffffffff() [ 30.454707] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.455351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3f6501 [ 30.455928] page dumped because: kasan: bad access detected [ 30.456348] [ 30.456490] Memory state around the buggy address: [ 30.456886] ffff88801b016000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.457466] ffff88801b016080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.458054] >ffff88801b016100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.458669] ^ [ 30.459108] ffff88801b016180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.459705] ffff88801b016200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.460297] ================================================================== [ 30.461071] Disabling lock debugging due to kernel taint [ 33.361948] BUG: Bad rss-counter state mm:00000000f10ba74a type:MM_FILEPAGES val:33 [ 33.362622] BUG: Bad rss-counter state mm:00000000f10ba74a type:MM_ANONPAGES val:22 [ 34.421869] BUG: Bad rss-counter state mm:000000006c71b5ee type:MM_FILEPAGES val:33 [ 34.422640] BUG: Bad rss-counter state mm:000000006c71b5ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53612' (ECDSA) to the list of known hosts. 2023/06/20 10:23:35 fuzzer started 2023/06/20 10:23:35 dialing manager at localhost:44161 2023/06/20 10:23:35 checking machine... 2023/06/20 10:23:35 checking revisions... [ 35.380690] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:23:35 testing simple program... [ 35.421800] cgroup: Unknown subsys name 'net' [ 35.496399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:23:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007faba3cb7ba0 CR3=000000000d9f6000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=1c83a4a0128865300000000000135cb0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=aff3ef4eba8901a300000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 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=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=000055f72185d4d0 CR3=000000000f726000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000