syzkaller login: [ 251.798936] BUG: Bad rss-counter state mm:00000000f5d42209 type:MM_FILEPAGES val:33 [ 251.800121] BUG: Bad rss-counter state mm:00000000f5d42209 type:MM_ANONPAGES val:22 [ 252.037508] ================================================================== [ 252.038459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 252.039409] Read of size 8 at addr ffff8880162c1b38 by task sshd/220 [ 252.040205] [ 252.040425] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 252.041650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 252.042663] Call Trace: [ 252.042987] [ 252.043272] dump_stack_lvl+0x91/0xf0 [ 252.043780] print_report+0xcc/0x620 [ 252.044277] ? __virt_addr_valid+0x102/0x340 [ 252.044864] ? vma_interval_tree_remove+0xc75/0xec0 [ 252.045489] ? vma_interval_tree_remove+0xc75/0xec0 [ 252.046147] kasan_report+0xbe/0xf0 [ 252.046634] ? vma_interval_tree_remove+0xc75/0xec0 [ 252.047268] vma_interval_tree_remove+0xc75/0xec0 [ 252.047885] vma_prepare+0xc54/0x11a0 [ 252.048362] __split_vma+0x5af/0x950 [ 252.048872] ? __pfx___split_vma+0x10/0x10 [ 252.049403] ? find_held_lock+0x2c/0x110 [ 252.049939] do_vmi_align_munmap+0x2ba/0x11f0 [ 252.050526] ? lock_is_held_type+0x9f/0x120 [ 252.051081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 252.051698] ? mtree_range_walk+0x632/0x900 [ 252.052246] ? mas_walk+0x5c7/0x7c0 [ 252.052735] do_vmi_munmap+0x1f1/0x2b0 [ 252.053227] mmap_region+0x1f9/0x2660 [ 252.053732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 252.054270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 252.055007] ? __pfx_lock_acquire+0x10/0x10 [ 252.055547] ? __pfx_mmap_region+0x10/0x10 [ 252.056098] ? security_mmap_addr+0x7d/0xa0 [ 252.056635] ? get_unmapped_area+0x1f5/0x3f0 [ 252.057200] do_mmap+0x854/0xf00 [ 252.057654] vm_mmap_pgoff+0x1a6/0x3a0 [ 252.058192] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 252.058778] ksys_mmap_pgoff+0x3af/0x500 [ 252.059295] do_syscall_64+0x3f/0x90 [ 252.059790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 252.060441] RIP: 0033:0x7f7d31a55d82 [ 252.060913] 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 [ 252.063132] RSP: 002b:00007fff46261e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 252.064085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d31a55d82 [ 252.064946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d30e8f000 [ 252.065813] RBP: 00007f7d30e8f000 R08: 0000000000000009 R09: 0000000000001000 [ 252.066702] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfcacf4f70 [ 252.067546] R13: 00007fff46261e60 R14: 00007fff46261e90 R15: 00007fff462621f0 [ 252.068440] [ 252.068762] [ 252.068982] Allocated by task 213: [ 252.069415] kasan_save_stack+0x22/0x50 [ 252.069932] kasan_set_track+0x25/0x30 [ 252.070451] __kasan_slab_alloc+0x59/0x70 [ 252.070990] kmem_cache_alloc+0x16b/0x370 [ 252.071515] vm_area_dup+0x20/0x160 [ 252.072003] __split_vma+0x170/0x950 [ 252.072469] split_vma+0xc6/0x110 [ 252.072925] mprotect_fixup+0x8d2/0xb30 [ 252.073427] do_mprotect_pkey+0x87e/0xd40 [ 252.073963] __x64_sys_mprotect+0x78/0xc0 [ 252.074493] do_syscall_64+0x3f/0x90 [ 252.074980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 252.075623] [ 252.075877] Freed by task 13: [ 252.076267] kasan_save_stack+0x22/0x50 [ 252.076779] kasan_set_track+0x25/0x30 [ 252.077279] kasan_save_free_info+0x2b/0x50 [ 252.077820] __kasan_slab_free+0x10a/0x190 [ 252.078359] kmem_cache_free+0x10d/0x4d0 [ 252.078887] rcu_core+0x8c8/0x2860 [ 252.079341] __do_softirq+0x1b7/0x7d4 [ 252.079835] [ 252.080057] Last potentially related work creation: [ 252.080649] kasan_save_stack+0x22/0x50 [ 252.081175] __kasan_record_aux_stack+0x8e/0xa0 [ 252.081779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 252.082448] remove_vma+0x139/0x170 [ 252.082923] do_vmi_align_munmap+0xd4a/0x11f0 [ 252.083493] do_vmi_munmap+0x1f1/0x2b0 [ 252.083990] __vm_munmap+0x138/0x3a0 [ 252.084474] __x64_sys_munmap+0x59/0x80 [ 252.085014] do_syscall_64+0x3f/0x90 [ 252.085492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 252.086160] [ 252.086375] The buggy address belongs to the object at ffff8880162c1ae0 [ 252.086375] which belongs to the cache vm_area_struct of size 168 [ 252.087876] The buggy address is located 88 bytes inside of [ 252.087876] freed 168-byte region [ffff8880162c1ae0, ffff8880162c1b88) [ 252.089313] [ 252.089543] The buggy address belongs to the physical page: [ 252.090240] page:00000000efb8a87c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162c1 [ 252.091369] memcg:ffff88800eae0701 [ 252.091809] flags: 0x100000000000200(slab|node=0|zone=1) [ 252.092453] page_type: 0xffffffff() [ 252.092922] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 252.093861] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eae0701 [ 252.094815] page dumped because: kasan: bad access detected [ 252.095478] [ 252.095705] Memory state around the buggy address: [ 252.096290] ffff8880162c1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 252.097388] ffff8880162c1a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 252.098556] >ffff8880162c1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 252.099636] ^ [ 252.100415] ffff8880162c1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 252.101502] ffff8880162c1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 252.102677] ================================================================== [ 252.103779] Disabling lock debugging due to kernel taint [ 253.927635] BUG: Bad rss-counter state mm:0000000064c40460 type:MM_FILEPAGES val:33 [ 253.928437] BUG: Bad rss-counter state mm:0000000064c40460 type:MM_ANONPAGES val:22 [ 254.332919] BUG: Bad rss-counter state mm:000000001d5e2c1e type:MM_FILEPAGES val:33 [ 254.334159] BUG: Bad rss-counter state mm:000000001d5e2c1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31619' (ECDSA) to the list of known hosts. 2023/06/19 16:38:59 fuzzer started 2023/06/19 16:38:59 dialing manager at localhost:44161 2023/06/19 16:38:59 checking machine... 2023/06/19 16:38:59 checking revisions... [ 255.069114] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:38:59 testing simple program... [ 255.117342] cgroup: Unknown subsys name 'net' [ 255.166670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:35:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880182c7130 RCX=ffff8880182c7130 RDX=00000000800d000c RSI=ffff8880182c7130 RDI=ffff88800844f780 RBP=ffff88800f1dfc68 RSP=ffff88800f1dfbd0 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea000060b1c0 R11=00000000000d000c R12=ffffea000060b1c0 R13=ffff8880182c7000 R14=00000000800d000b R15=ffff88800844f780 RIP=ffffffff818094f2 RFL=00000246 [---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 00007f7f63d66900 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=00007f7f6431e0b0 CR3=000000000f780000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f762e326ce0 CR3=0000000013a4a000 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=2ccc8ceeef084ebe4c47e8d50048aa92 XMM02=ec2efd57dc4c00df0000000000134af0 XMM03=36a2c656443f03bd0000000000134bc0 XMM04=7541c0173f2b972200000000000ae988 XMM05=9959427d00f7231c000000000015de68 XMM06=c291bd5c70af25b9000000000015cf08 XMM07=e042d86d42eb936e000000000013baf0 XMM08=36a2c656443f03bd0000000000134bc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000