syzkaller login: [ 30.073066] BUG: Bad rss-counter state mm:000000003e49de80 type:MM_FILEPAGES val:33 [ 30.074580] BUG: Bad rss-counter state mm:000000003e49de80 type:MM_ANONPAGES val:22 [ 30.241416] ================================================================== [ 30.242720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.244176] Read of size 8 at addr ffff88800de9c798 by task sshd/221 [ 30.245251] [ 30.245549] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.246710] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.247838] Call Trace: [ 30.248206] [ 30.248539] dump_stack_lvl+0x91/0xf0 [ 30.249110] print_report+0xcc/0x620 [ 30.249667] ? __virt_addr_valid+0x102/0x340 [ 30.250319] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251034] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251742] kasan_report+0xbe/0xf0 [ 30.252290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.253004] vma_interval_tree_remove+0xc75/0xec0 [ 30.253698] vma_prepare+0xc54/0x11a0 [ 30.254274] __split_vma+0x5af/0x950 [ 30.254817] ? __pfx___split_vma+0x10/0x10 [ 30.255423] ? find_held_lock+0x2c/0x110 [ 30.256026] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.256681] ? lock_is_held_type+0x9f/0x120 [ 30.257302] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.258015] ? mtree_range_walk+0x632/0x900 [ 30.258661] ? mas_walk+0x5c7/0x7c0 [ 30.259206] do_vmi_munmap+0x1f1/0x2b0 [ 30.259774] mmap_region+0x1f9/0x2660 [ 30.260326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.260925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.261748] ? __pfx_lock_acquire+0x10/0x10 [ 30.262396] ? __pfx_mmap_region+0x10/0x10 [ 30.263011] ? security_mmap_addr+0x7d/0xa0 [ 30.263626] ? get_unmapped_area+0x1f5/0x3f0 [ 30.264256] do_mmap+0x854/0xf00 [ 30.264772] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.265343] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.266003] ksys_mmap_pgoff+0x3af/0x500 [ 30.266590] do_syscall_64+0x3f/0x90 [ 30.267144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267884] RIP: 0033:0x7fac04931d82 [ 30.268412] 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 [ 30.270879] RSP: 002b:00007fff61b94088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.271930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac04931d82 [ 30.272907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac03d6b000 [ 30.273919] RBP: 00007fac03d6b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.274902] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596ac037ec0 [ 30.275877] R13: 00007fff61b940a0 R14: 00007fff61b940d0 R15: 00007fff61b94430 [ 30.276872] [ 30.277216] [ 30.277463] Allocated by task 214: [ 30.277969] kasan_save_stack+0x22/0x50 [ 30.278552] kasan_set_track+0x25/0x30 [ 30.279127] __kasan_slab_alloc+0x59/0x70 [ 30.279740] kmem_cache_alloc+0x16b/0x370 [ 30.280338] vm_area_dup+0x20/0x160 [ 30.280861] __split_vma+0x170/0x950 [ 30.281399] split_vma+0xc6/0x110 [ 30.281926] mprotect_fixup+0x8d2/0xb30 [ 30.282507] do_mprotect_pkey+0x87e/0xd40 [ 30.283107] __x64_sys_mprotect+0x78/0xc0 [ 30.283711] do_syscall_64+0x3f/0x90 [ 30.284254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.285035] [ 30.285287] Freed by task 214: [ 30.285743] kasan_save_stack+0x22/0x50 [ 30.286338] kasan_set_track+0x25/0x30 [ 30.286914] kasan_save_free_info+0x2b/0x50 [ 30.287535] __kasan_slab_free+0x10a/0x190 [ 30.288156] kmem_cache_free+0x10d/0x4d0 [ 30.288748] rcu_core+0x8c8/0x2860 [ 30.289260] __do_softirq+0x1b7/0x7d4 [ 30.289834] [ 30.290083] Last potentially related work creation: [ 30.290766] kasan_save_stack+0x22/0x50 [ 30.291347] __kasan_record_aux_stack+0x8e/0xa0 [ 30.292008] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.292759] remove_vma+0x139/0x170 [ 30.293280] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.293939] do_vmi_munmap+0x1f1/0x2b0 [ 30.294500] __vm_munmap+0x138/0x3a0 [ 30.295040] __x64_sys_munmap+0x59/0x80 [ 30.295610] do_syscall_64+0x3f/0x90 [ 30.296161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.296899] [ 30.297146] Second to last potentially related work creation: [ 30.297937] kasan_save_stack+0x22/0x50 [ 30.298510] __kasan_record_aux_stack+0x8e/0xa0 [ 30.299158] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.299885] remove_vma+0x139/0x170 [ 30.300402] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.301034] do_vmi_munmap+0x1f1/0x2b0 [ 30.301592] mmap_region+0x1f9/0x2660 [ 30.302163] do_mmap+0x854/0xf00 [ 30.302654] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.303215] ksys_mmap_pgoff+0x3af/0x500 [ 30.303786] do_syscall_64+0x3f/0x90 [ 30.304336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.305068] [ 30.305312] The buggy address belongs to the object at ffff88800de9c740 [ 30.305312] which belongs to the cache vm_area_struct of size 168 [ 30.307009] The buggy address is located 88 bytes inside of [ 30.307009] freed 168-byte region [ffff88800de9c740, ffff88800de9c7e8) [ 30.308611] [ 30.308858] The buggy address belongs to the physical page: [ 30.309613] page:0000000050d99cd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde9c [ 30.310857] memcg:ffff88800d70f601 [ 30.311344] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.312142] page_type: 0xffffffff() [ 30.312659] raw: 0100000000000200 ffff88800879fc80 ffffea000037af40 dead000000000005 [ 30.313705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d70f601 [ 30.314755] page dumped because: kasan: bad access detected [ 30.315511] [ 30.315758] Memory state around the buggy address: [ 30.316421] ffff88800de9c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.317398] ffff88800de9c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.318388] >ffff88800de9c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.319365] ^ [ 30.319940] ffff88800de9c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.320915] ffff88800de9c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.321904] ================================================================== [ 30.323026] Disabling lock debugging due to kernel taint [ 32.218364] BUG: Bad rss-counter state mm:00000000921f20f1 type:MM_FILEPAGES val:33 [ 32.219101] BUG: Bad rss-counter state mm:00000000921f20f1 type:MM_ANONPAGES val:22 [ 32.676721] BUG: Bad rss-counter state mm:00000000c976e16a type:MM_FILEPAGES val:33 [ 32.678021] BUG: Bad rss-counter state mm:00000000c976e16a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12378' (ECDSA) to the list of known hosts. 2023/06/19 20:16:03 fuzzer started 2023/06/19 20:16:03 dialing manager at localhost:44161 2023/06/19 20:16:03 checking machine... 2023/06/19 20:16:03 checking revisions... [ 33.349004] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:16:03 testing simple program... [ 33.391191] cgroup: Unknown subsys name 'net' [ 33.433249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:03 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=0000000000000001 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=000055f384953000 CR3=0000000005482000 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=00007f55d25fe510000055603e686790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf3a360 RCX=ffffffff81378094 RDX=1ffff1100d9e746c RSI=ffff88806cf09ee8 RDI=ffff88806cf09ef0 RBP=ffff88801c8611b0 RSP=ffff88806cf09e38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9e7479 R12=ffff88801c861540 R13=dffffc0000000000 R14=000000000000009a R15=ffff88806cf3a360 RIP=ffffffff81380bed 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 00007fba4d0e2900 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=00007fba4d69a0b0 CR3=000000000fca6000 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