syzkaller login: [ 38.905048] BUG: Bad rss-counter state mm:0000000001d54ed9 type:MM_FILEPAGES val:33 [ 38.905857] BUG: Bad rss-counter state mm:0000000001d54ed9 type:MM_ANONPAGES val:22 [ 39.012107] ================================================================== [ 39.013216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.014451] Read of size 8 at addr ffff88800c632798 by task sshd/220 [ 39.015037] [ 39.015163] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.015701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.016262] Call Trace: [ 39.016453] [ 39.016612] dump_stack_lvl+0x91/0xf0 [ 39.016894] print_report+0xcc/0x620 [ 39.017162] ? __virt_addr_valid+0x102/0x340 [ 39.017475] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.017820] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.018162] kasan_report+0xbe/0xf0 [ 39.018427] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.018780] vma_interval_tree_remove+0xc75/0xec0 [ 39.019125] vma_prepare+0xc54/0x11a0 [ 39.019395] __split_vma+0x5af/0x950 [ 39.019658] ? __pfx___split_vma+0x10/0x10 [ 39.019949] ? find_held_lock+0x2c/0x110 [ 39.020240] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.020561] ? lock_is_held_type+0x9f/0x120 [ 39.020860] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.021197] ? mtree_range_walk+0x632/0x900 [ 39.021504] ? mas_walk+0x5c7/0x7c0 [ 39.021769] do_vmi_munmap+0x1f1/0x2b0 [ 39.022043] mmap_region+0x1f9/0x2660 [ 39.022315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.022606] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.023025] ? __pfx_lock_acquire+0x10/0x10 [ 39.023326] ? __pfx_mmap_region+0x10/0x10 [ 39.023620] ? security_mmap_addr+0x7d/0xa0 [ 39.023916] ? get_unmapped_area+0x1f5/0x3f0 [ 39.024224] do_mmap+0x854/0xf00 [ 39.024469] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.024750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.025088] ksys_mmap_pgoff+0x3af/0x500 [ 39.025394] do_syscall_64+0x3f/0x90 [ 39.025683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.026069] RIP: 0033:0x7f9127900d82 [ 39.026348] 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 [ 39.027672] RSP: 002b:00007ffdde852bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.028226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9127900d82 [ 39.028741] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9126d3a000 [ 39.029260] RBP: 00007f9126d3a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.029772] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559db2c11ec0 [ 39.030282] R13: 00007ffdde852bf0 R14: 00007ffdde852c20 R15: 00007ffdde852f80 [ 39.030795] [ 39.030985] [ 39.031113] Allocated by task 213: [ 39.031363] kasan_save_stack+0x22/0x50 [ 39.031661] kasan_set_track+0x25/0x30 [ 39.031953] __kasan_slab_alloc+0x59/0x70 [ 39.032263] kmem_cache_alloc+0x16b/0x370 [ 39.032569] vm_area_dup+0x20/0x160 [ 39.032837] __split_vma+0x170/0x950 [ 39.033117] split_vma+0xc6/0x110 [ 39.033366] mprotect_fixup+0x8d2/0xb30 [ 39.033667] do_mprotect_pkey+0x87e/0xd40 [ 39.033980] __x64_sys_mprotect+0x78/0xc0 [ 39.034268] do_syscall_64+0x3f/0x90 [ 39.034528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.034915] [ 39.035051] Freed by task 19: [ 39.035285] kasan_save_stack+0x22/0x50 [ 39.035583] kasan_set_track+0x25/0x30 [ 39.035888] kasan_save_free_info+0x2b/0x50 [ 39.036203] __kasan_slab_free+0x10a/0x190 [ 39.036523] kmem_cache_free+0x10d/0x4d0 [ 39.036824] rcu_core+0x8c8/0x2860 [ 39.037090] __do_softirq+0x1b7/0x7d4 [ 39.037372] [ 39.037499] Last potentially related work creation: [ 39.037858] kasan_save_stack+0x22/0x50 [ 39.038154] __kasan_record_aux_stack+0x8e/0xa0 [ 39.038495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.038903] remove_vma+0x139/0x170 [ 39.039172] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.039491] do_vmi_munmap+0x1f1/0x2b0 [ 39.039758] __vm_munmap+0x138/0x3a0 [ 39.040016] __x64_sys_munmap+0x59/0x80 [ 39.040291] do_syscall_64+0x3f/0x90 [ 39.040576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.040967] [ 39.041090] The buggy address belongs to the object at ffff88800c632740 [ 39.041090] which belongs to the cache vm_area_struct of size 168 [ 39.041979] The buggy address is located 88 bytes inside of [ 39.041979] freed 168-byte region [ffff88800c632740, ffff88800c6327e8) [ 39.042815] [ 39.042959] The buggy address belongs to the physical page: [ 39.043360] page:00000000b5a0614b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc632 [ 39.044031] memcg:ffff88800d1b5201 [ 39.044300] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.044730] page_type: 0xffffffff() [ 39.044992] raw: 0100000000000200 ffff88800879fc80 ffffea0000633800 dead000000000005 [ 39.045544] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1b5201 [ 39.046118] page dumped because: kasan: bad access detected [ 39.046509] [ 39.046631] Memory state around the buggy address: [ 39.046981] ffff88800c632680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.047482] ffff88800c632700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.047979] >ffff88800c632780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.048484] ^ [ 39.048775] ffff88800c632800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.049274] ffff88800c632880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.049776] ================================================================== [ 39.050375] Disabling lock debugging due to kernel taint [ 41.119215] BUG: Bad rss-counter state mm:00000000a990a3a6 type:MM_FILEPAGES val:33 [ 41.120425] BUG: Bad rss-counter state mm:00000000a990a3a6 type:MM_ANONPAGES val:22 [ 41.536241] BUG: Bad rss-counter state mm:000000003ec9784a type:MM_FILEPAGES val:33 [ 41.537385] BUG: Bad rss-counter state mm:000000003ec9784a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20665' (ECDSA) to the list of known hosts. 2023/06/20 05:32:47 fuzzer started 2023/06/20 05:32:47 dialing manager at localhost:44161 2023/06/20 05:32:47 checking machine... 2023/06/20 05:32:47 checking revisions... [ 42.309736] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:32:47 testing simple program... [ 42.364389] cgroup: Unknown subsys name 'net' [ 42.427648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:32:46 Registers: info registers vcpu 0 RAX=000000000000000d RBX=0000000000000001 RCX=ffffffff84506c7e RDX=000000000000000d RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffff88806ce09af0 RSP=ffff88806ce099f8 R8 =ffffffff864b0222 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc20 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 00007f345666c700 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=000055d13660c818 CR3=000000000e5b2000 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=2037343a32333a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffe7c7ea0f0 RBX=00007ffe7c7d8340 RCX=000000000000e4a2 RDX=0000000000000000 RSI=00007ffe7c7d8300 RDI=0000000000000005 RBP=00007ffe7c7d8220 RSP=00007ffe7c7d81f0 R8 =000055d1365f3890 R9 =00007ffe7c7ea080 R10=0000000000000010 R11=0000000000000246 R12=00007ffe7c7d8300 R13=00000000000000e5 R14=0000000000000009 R15=00007ffe7c7d8a30 RIP=00007ffe7c7eea7d RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe4eb1fd900 00000000 00000000 GS =0000 0000000000000000 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=00007fe4eb7b4618 CR3=000000000f2aa000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000