syzkaller login: [ 30.177663] BUG: Bad rss-counter state mm:00000000427fda8d type:MM_FILEPAGES val:33 [ 30.178798] BUG: Bad rss-counter state mm:00000000427fda8d type:MM_ANONPAGES val:22 [ 30.341696] ================================================================== [ 30.342796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.343914] Read of size 8 at addr ffff888009bf2310 by task sshd/219 [ 30.345008] [ 30.345269] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.346303] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.347500] Call Trace: [ 30.347876] [ 30.348212] dump_stack_lvl+0x91/0xf0 [ 30.348787] print_report+0xcc/0x620 [ 30.349357] ? __virt_addr_valid+0x102/0x340 [ 30.350043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.350775] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.351386] kasan_report+0xbe/0xf0 [ 30.351855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.352480] vma_interval_tree_remove+0xc75/0xec0 [ 30.353077] vma_prepare+0xc54/0x11a0 [ 30.353555] __split_vma+0x5af/0x950 [ 30.354028] ? __pfx___split_vma+0x10/0x10 [ 30.354543] ? find_held_lock+0x2c/0x110 [ 30.355054] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.355609] ? lock_is_held_type+0x9f/0x120 [ 30.356137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.356722] ? mtree_range_walk+0x632/0x900 [ 30.357269] ? mas_walk+0x5c7/0x7c0 [ 30.357745] do_vmi_munmap+0x1f1/0x2b0 [ 30.358281] mmap_region+0x1f9/0x2660 [ 30.358767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.359280] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.359994] ? __pfx_lock_acquire+0x10/0x10 [ 30.360532] ? __pfx_mmap_region+0x10/0x10 [ 30.361065] ? security_mmap_addr+0x7d/0xa0 [ 30.361598] ? get_unmapped_area+0x1f5/0x3f0 [ 30.362180] do_mmap+0x854/0xf00 [ 30.362623] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.363121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.363683] ksys_mmap_pgoff+0x3af/0x500 [ 30.364197] do_syscall_64+0x3f/0x90 [ 30.364680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365327] RIP: 0033:0x7f38a57a4d82 [ 30.365788] 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 [ 30.367973] RSP: 002b:00007ffc804651d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.368891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38a57a4d82 [ 30.369750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38a4bde000 [ 30.370637] RBP: 00007f38a4bde000 R08: 0000000000000009 R09: 0000000000001000 [ 30.371507] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ad5c5fec0 [ 30.372370] R13: 00007ffc804651f0 R14: 00007ffc80465220 R15: 00007ffc80465580 [ 30.373245] [ 30.373542] [ 30.373759] Allocated by task 212: [ 30.374209] kasan_save_stack+0x22/0x50 [ 30.374713] kasan_set_track+0x25/0x30 [ 30.375213] __kasan_slab_alloc+0x59/0x70 [ 30.375735] kmem_cache_alloc+0x16b/0x370 [ 30.376261] vm_area_dup+0x20/0x160 [ 30.376723] __split_vma+0x170/0x950 [ 30.377199] split_vma+0xc6/0x110 [ 30.377649] mprotect_fixup+0x8d2/0xb30 [ 30.378171] do_mprotect_pkey+0x87e/0xd40 [ 30.378699] __x64_sys_mprotect+0x78/0xc0 [ 30.379229] do_syscall_64+0x3f/0x90 [ 30.379711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.380370] [ 30.380593] Freed by task 19: [ 30.380981] kasan_save_stack+0x22/0x50 [ 30.381506] kasan_set_track+0x25/0x30 [ 30.382034] kasan_save_free_info+0x2b/0x50 [ 30.382578] __kasan_slab_free+0x10a/0x190 [ 30.383121] kmem_cache_free+0x10d/0x4d0 [ 30.383642] rcu_core+0x8c8/0x2860 [ 30.384087] __do_softirq+0x1b7/0x7d4 [ 30.384576] [ 30.384798] Last potentially related work creation: [ 30.385389] kasan_save_stack+0x22/0x50 [ 30.385902] __kasan_record_aux_stack+0x8e/0xa0 [ 30.386570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.387232] remove_vma+0x139/0x170 [ 30.387689] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.388251] do_vmi_munmap+0x1f1/0x2b0 [ 30.388738] __vm_munmap+0x138/0x3a0 [ 30.389214] __x64_sys_munmap+0x59/0x80 [ 30.389710] do_syscall_64+0x3f/0x90 [ 30.390219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.390862] [ 30.391082] The buggy address belongs to the object at ffff888009bf22b8 [ 30.391082] which belongs to the cache vm_area_struct of size 168 [ 30.392561] The buggy address is located 88 bytes inside of [ 30.392561] freed 168-byte region [ffff888009bf22b8, ffff888009bf2360) [ 30.393990] [ 30.394208] The buggy address belongs to the physical page: [ 30.394873] page:00000000f974e0ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9bf2 [ 30.395968] memcg:ffff88800df86a01 [ 30.396397] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.397056] page_type: 0xffffffff() [ 30.397513] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.398468] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df86a01 [ 30.399394] page dumped because: kasan: bad access detected [ 30.400053] [ 30.400268] Memory state around the buggy address: [ 30.400854] ffff888009bf2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.401731] ffff888009bf2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.402622] >ffff888009bf2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.403483] ^ [ 30.403950] ffff888009bf2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.404816] ffff888009bf2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.405684] ================================================================== [ 30.406625] Disabling lock debugging due to kernel taint [ 33.165240] BUG: Bad rss-counter state mm:00000000264d439f type:MM_FILEPAGES val:33 [ 33.166780] BUG: Bad rss-counter state mm:00000000264d439f type:MM_ANONPAGES val:22 [ 33.655920] BUG: Bad rss-counter state mm:0000000033fcba98 type:MM_FILEPAGES val:33 [ 33.656985] BUG: Bad rss-counter state mm:0000000033fcba98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10343' (ECDSA) to the list of known hosts. 2023/06/21 00:38:08 fuzzer started 2023/06/21 00:38:08 dialing manager at localhost:36067 2023/06/21 00:38:08 checking machine... 2023/06/21 00:38:08 checking revisions... [ 34.392267] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:38:08 testing simple program... [ 34.432115] cgroup: Unknown subsys name 'net' [ 34.509166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:38:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888015f884d8 RSP=ffff888015a779f0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=ffff888015a77dc8 R14=ffff888015a77c00 R15=dffffc0000000000 RIP=ffffffff8162dccb RFL=00000286 [--S--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 00007f8017a81900 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=00007f80180390b0 CR3=000000000f73a000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8161a536 RDX=ffff888008d951c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffff848ced00 RSP=ffff888008e07d38 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000025c24 R15=0000000000000001 RIP=ffffffff814c027c 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 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=00007efcf2baaad0 CR3=00000000145b8000 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=3cd58d29735c10a25048ac894c9cf830 XMM02=0000000000119ea0eff9b2d0a8fce9cb XMM03=0000000000119f702c67c8bc2e329bc3 XMM04=0ba9c9294d45017200000000000ae988 XMM05=dfcdbad4f1609c370000000000131540 XMM06=e10d4f9fd2325d9700000000001303a8 XMM07=e042d86d42eb936e0000000000121a00 XMM08=b96e511928459e5f0000000000119f70 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000