syzkaller login: [ 99.395346] BUG: Bad rss-counter state mm:0000000099b81b2b type:MM_FILEPAGES val:33 [ 99.395997] BUG: Bad rss-counter state mm:0000000099b81b2b type:MM_ANONPAGES val:22 [ 99.585845] ================================================================== [ 99.586428] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 99.587021] Read of size 8 at addr ffff888015bacd08 by task sshd/229 [ 99.591536] [ 99.591679] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 99.592221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 99.592835] Call Trace: [ 99.593039] [ 99.593223] dump_stack_lvl+0x91/0xf0 [ 99.593539] print_report+0xcc/0x620 [ 99.593853] ? __virt_addr_valid+0x102/0x340 [ 99.594206] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.594597] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.594988] kasan_report+0xbe/0xf0 [ 99.599398] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.599806] vma_interval_tree_remove+0xc75/0xec0 [ 99.600199] vma_prepare+0xc54/0x11a0 [ 99.600512] __split_vma+0x5af/0x950 [ 99.600823] ? __pfx___split_vma+0x10/0x10 [ 99.601171] ? find_held_lock+0x2c/0x110 [ 99.601514] do_vmi_align_munmap+0x2ba/0x11f0 [ 99.601882] ? lock_is_held_type+0x9f/0x120 [ 99.602240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 99.602631] ? mtree_range_walk+0x632/0x900 [ 99.602992] ? mas_walk+0x5c7/0x7c0 [ 99.603354] do_vmi_munmap+0x1f1/0x2b0 [ 99.603680] mmap_region+0x1f9/0x2660 [ 99.603998] ? vm_mmap_pgoff+0x15c/0x3a0 [ 99.604335] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 99.604799] ? __pfx_lock_acquire+0x10/0x10 [ 99.605148] ? __pfx_mmap_region+0x10/0x10 [ 99.605491] ? security_mmap_addr+0x7d/0xa0 [ 99.605837] ? get_unmapped_area+0x1f5/0x3f0 [ 99.606189] do_mmap+0x854/0xf00 [ 99.606487] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.606812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 99.607173] ksys_mmap_pgoff+0x3af/0x500 [ 99.607537] do_syscall_64+0x3f/0x90 [ 99.607846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.608267] RIP: 0033:0x7fd64ac19d82 [ 99.608564] 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 [ 99.609929] RSP: 002b:00007ffe4b4a1b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 99.610514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd64ac19d82 [ 99.611061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd64a053000 [ 99.612693] RBP: 00007fd64a053000 R08: 0000000000000009 R09: 0000000000001000 [ 99.613244] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634ea31bd90 [ 99.613793] R13: 00007ffe4b4a1b90 R14: 00007ffe4b4a1bc0 R15: 00007ffe4b4a1f20 [ 99.614345] [ 99.614539] [ 99.614680] Allocated by task 222: [ 99.614959] kasan_save_stack+0x22/0x50 [ 99.615850] kasan_set_track+0x25/0x30 [ 99.616176] __kasan_slab_alloc+0x59/0x70 [ 99.616526] kmem_cache_alloc+0x16b/0x370 [ 99.616863] vm_area_dup+0x20/0x160 [ 99.617161] __split_vma+0x170/0x950 [ 99.617466] split_vma+0xc6/0x110 [ 99.617752] mprotect_fixup+0x8d2/0xb30 [ 99.618081] do_mprotect_pkey+0x87e/0xd40 [ 99.618422] __x64_sys_mprotect+0x78/0xc0 [ 99.618762] do_syscall_64+0x3f/0x90 [ 99.619072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.619532] [ 99.619673] Freed by task 222: [ 99.619929] kasan_save_stack+0x22/0x50 [ 99.620262] kasan_set_track+0x25/0x30 [ 99.620587] kasan_save_free_info+0x2b/0x50 [ 99.620935] __kasan_slab_free+0x10a/0x190 [ 99.621283] kmem_cache_free+0x10d/0x4d0 [ 99.621615] rcu_core+0x8c8/0x2860 [ 99.621906] __do_softirq+0x1b7/0x7d4 [ 99.622221] [ 99.622361] Last potentially related work creation: [ 99.622737] kasan_save_stack+0x22/0x50 [ 99.623063] __kasan_record_aux_stack+0x8e/0xa0 [ 99.624811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.625227] remove_vma+0x139/0x170 [ 99.625525] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.625888] do_vmi_munmap+0x1f1/0x2b0 [ 99.626207] __vm_munmap+0x138/0x3a0 [ 99.626512] __x64_sys_munmap+0x59/0x80 [ 99.626835] do_syscall_64+0x3f/0x90 [ 99.627143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.627596] [ 99.627739] The buggy address belongs to the object at ffff888015baccb0 [ 99.627739] which belongs to the cache vm_area_struct of size 168 [ 99.628670] The buggy address is located 88 bytes inside of [ 99.628670] freed 168-byte region [ffff888015baccb0, ffff888015bacd58) [ 99.629556] [ 99.629697] The buggy address belongs to the physical page: [ 99.630117] page:00000000cf388d91 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15bac [ 99.630813] memcg:ffff888018180f01 [ 99.631083] flags: 0x100000000000200(slab|node=0|zone=1) [ 99.632937] page_type: 0xffffffff() [ 99.633229] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 99.633816] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018180f01 [ 99.634403] page dumped because: kasan: bad access detected [ 99.634828] [ 99.634971] Memory state around the buggy address: [ 99.635358] ffff888015bacc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 99.635884] ffff888015bacc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 99.636433] >ffff888015bacd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 99.636979] ^ [ 99.637267] ffff888015bacd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 99.637814] ffff888015bace00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 99.638356] ================================================================== [ 99.639103] Disabling lock debugging due to kernel taint [ 103.061360] BUG: Bad rss-counter state mm:00000000e8322395 type:MM_FILEPAGES val:33 [ 103.062049] BUG: Bad rss-counter state mm:00000000e8322395 type:MM_ANONPAGES val:22 [ 104.217701] BUG: Bad rss-counter state mm:0000000067dd4255 type:MM_FILEPAGES val:33 [ 104.218594] BUG: Bad rss-counter state mm:0000000067dd4255 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23549' (ECDSA) to the list of known hosts. 2023/06/20 09:55:52 fuzzer started 2023/06/20 09:55:53 dialing manager at localhost:44161 2023/06/20 09:55:53 checking machine... 2023/06/20 09:55:53 checking revisions... 2023/06/20 09:55:53 testing simple program... [ 105.015846] kmemleak: Automatic memory scanning thread ended [ 105.056484] cgroup: Unknown subsys name 'net' [ 105.139651] cgroup: Unknown subsys name 'rlimit' executing program [ 108.152755] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program VM DIAGNOSIS: 09:55:52 Registers: info registers vcpu 0 RAX=ffff8880183e8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880183e7601 RSI=ffff8880183e76c8 RDI=ffff8880183e75a8 RBP=ffff8880183e75f0 RSP=ffff8880183e7510 R8 =ffffffff860d68fa R9 =ffff8880183e75d8 R10=0000000000038001 R11=0000000000010b7e R12=ffff8880183e75f8 R13=ffff8880183e0000 R14=ffff8880183e76d0 R15=ffff8880183e7598 RIP=ffffffff811304d1 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 00007f2d2b7ba900 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=00007f2d2b7ba6f8 CR3=000000000fd98000 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=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 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=00007fab5f84c328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000