syzkaller login: [ 35.525329] BUG: Bad rss-counter state mm:00000000c007fc76 type:MM_FILEPAGES val:33 [ 35.526523] BUG: Bad rss-counter state mm:00000000c007fc76 type:MM_ANONPAGES val:22 [ 35.575776] ================================================================== [ 35.576708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.577698] Read of size 8 at addr ffff88800eeb7798 by task sshd/220 [ 35.578484] [ 35.578706] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.579576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.580578] Call Trace: [ 35.580902] [ 35.581200] dump_stack_lvl+0x91/0xf0 [ 35.581809] print_report+0xcc/0x620 [ 35.582301] ? __virt_addr_valid+0x102/0x340 [ 35.582851] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.583477] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.584087] kasan_report+0xbe/0xf0 [ 35.584578] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.585213] vma_interval_tree_remove+0xc75/0xec0 [ 35.585842] vma_prepare+0xc54/0x11a0 [ 35.586339] __split_vma+0x5af/0x950 [ 35.586812] ? __pfx___split_vma+0x10/0x10 [ 35.587358] ? find_held_lock+0x2c/0x110 [ 35.587880] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.588457] ? lock_is_held_type+0x9f/0x120 [ 35.588989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.589643] ? mtree_range_walk+0x632/0x900 [ 35.590208] ? mas_walk+0x5c7/0x7c0 [ 35.590691] do_vmi_munmap+0x1f1/0x2b0 [ 35.591204] mmap_region+0x1f9/0x2660 [ 35.591684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.592208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.592921] ? __pfx_lock_acquire+0x10/0x10 [ 35.593473] ? __pfx_mmap_region+0x10/0x10 [ 35.594000] ? security_mmap_addr+0x7d/0xa0 [ 35.594555] ? get_unmapped_area+0x1f5/0x3f0 [ 35.595106] do_mmap+0x854/0xf00 [ 35.595556] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.596052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.596758] ksys_mmap_pgoff+0x3af/0x500 [ 35.597283] do_syscall_64+0x3f/0x90 [ 35.597775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.598454] RIP: 0033:0x7f482747dd82 [ 35.598908] 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 [ 35.601054] RSP: 002b:00007fff49e97bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.602017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f482747dd82 [ 35.602963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48268b7000 [ 35.603839] RBP: 00007f48268b7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.604721] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562768b96b20 [ 35.605592] R13: 00007fff49e97be0 R14: 00007fff49e97c10 R15: 00007fff49e97f70 [ 35.606480] [ 35.606778] [ 35.606992] Allocated by task 213: [ 35.607453] kasan_save_stack+0x22/0x50 [ 35.607964] kasan_set_track+0x25/0x30 [ 35.608477] __kasan_slab_alloc+0x59/0x70 [ 35.608998] kmem_cache_alloc+0x16b/0x370 [ 35.609549] vm_area_dup+0x20/0x160 [ 35.610021] __split_vma+0x170/0x950 [ 35.610509] split_vma+0xc6/0x110 [ 35.610952] mprotect_fixup+0x8d2/0xb30 [ 35.611474] do_mprotect_pkey+0x87e/0xd40 [ 35.612003] __x64_sys_mprotect+0x78/0xc0 [ 35.612559] do_syscall_64+0x3f/0x90 [ 35.613029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.613733] [ 35.613949] Freed by task 213: [ 35.614392] kasan_save_stack+0x22/0x50 [ 35.614891] kasan_set_track+0x25/0x30 [ 35.615394] kasan_save_free_info+0x2b/0x50 [ 35.615922] __kasan_slab_free+0x10a/0x190 [ 35.616458] kmem_cache_free+0x10d/0x4d0 [ 35.616963] rcu_core+0x8c8/0x2860 [ 35.617415] __do_softirq+0x1b7/0x7d4 [ 35.617893] [ 35.618108] Last potentially related work creation: [ 35.618695] kasan_save_stack+0x22/0x50 [ 35.619195] __kasan_record_aux_stack+0x8e/0xa0 [ 35.619771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.620409] remove_vma+0x139/0x170 [ 35.620854] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.621412] do_vmi_munmap+0x1f1/0x2b0 [ 35.621893] __vm_munmap+0x138/0x3a0 [ 35.622365] __x64_sys_munmap+0x59/0x80 [ 35.622858] do_syscall_64+0x3f/0x90 [ 35.623330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.624012] [ 35.624228] The buggy address belongs to the object at ffff88800eeb7740 [ 35.624228] which belongs to the cache vm_area_struct of size 168 [ 35.625704] The buggy address is located 88 bytes inside of [ 35.625704] freed 168-byte region [ffff88800eeb7740, ffff88800eeb77e8) [ 35.627098] [ 35.627316] The buggy address belongs to the physical page: [ 35.627973] page:00000000187dc2c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeb7 [ 35.629055] memcg:ffff88800e34b201 [ 35.629489] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.630131] page_type: 0xffffffff() [ 35.630583] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.631510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e34b201 [ 35.632416] page dumped because: kasan: bad access detected [ 35.633069] [ 35.633287] Memory state around the buggy address: [ 35.633878] ffff88800eeb7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.634730] ffff88800eeb7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.635585] >ffff88800eeb7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.636442] ^ [ 35.636934] ffff88800eeb7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.637811] ffff88800eeb7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.638653] ================================================================== [ 35.639666] Disabling lock debugging due to kernel taint [ 37.671862] BUG: Bad rss-counter state mm:000000005ab650d7 type:MM_FILEPAGES val:33 [ 37.673199] BUG: Bad rss-counter state mm:000000005ab650d7 type:MM_ANONPAGES val:22 [ 38.133166] BUG: Bad rss-counter state mm:000000009778202a type:MM_FILEPAGES val:33 [ 38.134993] BUG: Bad rss-counter state mm:000000009778202a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53362' (ECDSA) to the list of known hosts. 2023/06/20 02:13:45 fuzzer started 2023/06/20 02:13:45 dialing manager at localhost:44161 2023/06/20 02:13:45 checking machine... 2023/06/20 02:13:45 checking revisions... [ 38.956910] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:13:46 testing simple program... [ 39.007802] cgroup: Unknown subsys name 'net' [ 39.047882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:13:40 Registers: info registers vcpu 0 RAX=1ffffffff0c96049 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b0248 RBP=ffff8880146b7518 RSP=ffff8880146b7450 R8 =ffffffff864b024a R9 =ffff8880146b7500 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880146b7520 R13=ffff8880146b7508 R14=ffff8880146b7f58 R15=ffff8880146b74c0 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 00007f8e75921900 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=000055d731ee8768 CR3=0000000013a7a000 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=5662e76cdb41c38fad4dbede028c6a60 XMM02=eff9b2d0a8fce9cb000000000011f848 XMM03=2c67c8bc2e329bc3000000000011f970 XMM04=46e1bbee8c10103700000000000ae988 XMM05=63acc0c3d6e971fa0000000000134b30 XMM06=687b7a1cb5e0c1900000000000133bd8 XMM07=fb795ef6d65770560000000000124110 XMM08=2c67c8bc2e329bc3000000000011f970 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002cd1f25 RSP=ffff88801668f918 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806cf361a0 R13=ffffffff81839a5a R14=0000000000000288 R15=0000000000000000 RIP=ffffffff812d869a 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 00007feb1bc4d900 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=00007feb1c2050b0 CR3=000000000dad6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000