syzkaller login: [ 30.598458] BUG: Bad rss-counter state mm:000000001a2f5f83 type:MM_FILEPAGES val:33 [ 30.600289] BUG: Bad rss-counter state mm:000000001a2f5f83 type:MM_ANONPAGES val:22 [ 30.765353] ================================================================== [ 30.766246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767147] Read of size 8 at addr ffff88800fd23880 by task sshd/220 [ 30.767893] [ 30.768106] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.769023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.769975] Call Trace: [ 30.770284] [ 30.770575] dump_stack_lvl+0x91/0xf0 [ 30.771052] print_report+0xcc/0x620 [ 30.771524] ? __virt_addr_valid+0x102/0x340 [ 30.772058] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772657] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773258] kasan_report+0xbe/0xf0 [ 30.773724] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774353] vma_interval_tree_remove+0xc75/0xec0 [ 30.774941] vma_prepare+0xc54/0x11a0 [ 30.775408] __split_vma+0x5af/0x950 [ 30.775877] ? __pfx___split_vma+0x10/0x10 [ 30.776393] ? find_held_lock+0x2c/0x110 [ 30.776901] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.777452] ? lock_is_held_type+0x9f/0x120 [ 30.777986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.778578] ? mtree_range_walk+0x632/0x900 [ 30.779121] ? mas_walk+0x5c7/0x7c0 [ 30.779584] do_vmi_munmap+0x1f1/0x2b0 [ 30.780061] mmap_region+0x1f9/0x2660 [ 30.780530] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.781029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781720] ? __pfx_lock_acquire+0x10/0x10 [ 30.782256] ? __pfx_mmap_region+0x10/0x10 [ 30.782774] ? security_mmap_addr+0x7d/0xa0 [ 30.783287] ? get_unmapped_area+0x1f5/0x3f0 [ 30.783828] do_mmap+0x854/0xf00 [ 30.784265] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.785343] ksys_mmap_pgoff+0x3af/0x500 [ 30.785854] do_syscall_64+0x3f/0x90 [ 30.786321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786951] RIP: 0033:0x7fd7b695fd82 [ 30.787399] 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 [ 30.789462] RSP: 002b:00007ffc519a73a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.790354] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7b695fd82 [ 30.791197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7b5d99000 [ 30.792015] RBP: 00007fd7b5d99000 R08: 0000000000000009 R09: 0000000000001000 [ 30.792832] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e122a81ec0 [ 30.793662] R13: 00007ffc519a73c0 R14: 00007ffc519a73f0 R15: 00007ffc519a7750 [ 30.794515] [ 30.794802] [ 30.795016] Allocated by task 213: [ 30.795438] kasan_save_stack+0x22/0x50 [ 30.795926] kasan_set_track+0x25/0x30 [ 30.796404] __kasan_slab_alloc+0x59/0x70 [ 30.796912] kmem_cache_alloc+0x16b/0x370 [ 30.797410] vm_area_dup+0x20/0x160 [ 30.797855] __split_vma+0x170/0x950 [ 30.798305] split_vma+0xc6/0x110 [ 30.798734] mprotect_fixup+0x8d2/0xb30 [ 30.799225] do_mprotect_pkey+0x87e/0xd40 [ 30.799745] __x64_sys_mprotect+0x78/0xc0 [ 30.800261] do_syscall_64+0x3f/0x90 [ 30.800730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801366] [ 30.801580] Freed by task 213: [ 30.801987] kasan_save_stack+0x22/0x50 [ 30.802484] kasan_set_track+0x25/0x30 [ 30.802963] kasan_save_free_info+0x2b/0x50 [ 30.803481] __kasan_slab_free+0x10a/0x190 [ 30.803998] kmem_cache_free+0x10d/0x4d0 [ 30.804489] rcu_core+0x8c8/0x2860 [ 30.804922] __do_softirq+0x1b7/0x7d4 [ 30.805384] [ 30.805597] Last potentially related work creation: [ 30.806173] kasan_save_stack+0x22/0x50 [ 30.806663] __kasan_record_aux_stack+0x8e/0xa0 [ 30.807232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.807863] remove_vma+0x139/0x170 [ 30.808304] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.808853] do_vmi_munmap+0x1f1/0x2b0 [ 30.809332] __vm_munmap+0x138/0x3a0 [ 30.809808] __x64_sys_munmap+0x59/0x80 [ 30.810305] do_syscall_64+0x3f/0x90 [ 30.810779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811420] [ 30.811636] The buggy address belongs to the object at ffff88800fd23828 [ 30.811636] which belongs to the cache vm_area_struct of size 168 [ 30.813092] The buggy address is located 88 bytes inside of [ 30.813092] freed 168-byte region [ffff88800fd23828, ffff88800fd238d0) [ 30.814517] [ 30.814730] The buggy address belongs to the physical page: [ 30.815375] page:000000003f95f13b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd23 [ 30.816425] memcg:ffff88801419ed01 [ 30.816842] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817661] page_type: 0xffffffff() [ 30.818123] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.819048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801419ed01 [ 30.819954] page dumped because: kasan: bad access detected [ 30.820612] [ 30.820828] Memory state around the buggy address: [ 30.821403] ffff88800fd23780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.822274] ffff88800fd23800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.823139] >ffff88800fd23880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.823999] ^ [ 30.824427] ffff88800fd23900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.825287] ffff88800fd23980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.826159] ================================================================== [ 30.827143] Disabling lock debugging due to kernel taint [ 33.007479] BUG: Bad rss-counter state mm:000000000e887295 type:MM_FILEPAGES val:33 [ 33.008461] BUG: Bad rss-counter state mm:000000000e887295 type:MM_ANONPAGES val:22 [ 33.489423] BUG: Bad rss-counter state mm:000000007c68a0df type:MM_FILEPAGES val:33 [ 33.491140] BUG: Bad rss-counter state mm:000000007c68a0df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15683' (ECDSA) to the list of known hosts. 2023/06/20 15:30:18 fuzzer started 2023/06/20 15:30:18 dialing manager at localhost:36067 2023/06/20 15:30:18 checking machine... 2023/06/20 15:30:18 checking revisions... [ 34.212242] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:30:18 testing simple program... [ 34.258495] cgroup: Unknown subsys name 'net' [ 34.308554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:30:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5a30b44f00 CR3=000000000eb3c000 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=2892ae4c6a260f83464028686463824e XMM02=000000000011ab38ec2efd57dc4c00df XMM03=00000000001220d0144d5326778fb495 XMM04=e9d4410ad6354e4200000000000ae988 XMM05=9d402ea5b02388220000000000132ce0 XMM06=4fda316b135da52b0000000000131d80 XMM07=e042d86d42eb936e0000000000122350 XMM08=144d5326778fb495000000000011ab98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001ccfef7 RBX=ffff88800e67f788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e67f7b8 RBP=ffff88801a1cd000 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801a1e2da8 R14=ffffffff813782f8 R15=ffff88801a1e2da8 RIP=ffffffff818464e2 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 00007f5764a81900 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=00007ffda3aeb000 CR3=000000001c99e000 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=6720646572637465733a4d41503d706f 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