syzkaller login: [ 38.648180] BUG: Bad rss-counter state mm:00000000b37885b4 type:MM_FILEPAGES val:33 [ 38.649543] BUG: Bad rss-counter state mm:00000000b37885b4 type:MM_ANONPAGES val:22 [ 38.812754] ================================================================== [ 38.813663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.814618] Read of size 8 at addr ffff8880094d1798 by task sshd/219 [ 38.815477] [ 38.815706] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.816585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.817606] Call Trace: [ 38.817939] [ 38.818231] dump_stack_lvl+0x91/0xf0 [ 38.818726] print_report+0xcc/0x620 [ 38.819221] ? __virt_addr_valid+0x102/0x340 [ 38.819802] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.820432] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.821055] kasan_report+0xbe/0xf0 [ 38.821539] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.822178] vma_interval_tree_remove+0xc75/0xec0 [ 38.822783] vma_prepare+0xc54/0x11a0 [ 38.823264] __split_vma+0x5af/0x950 [ 38.823769] ? __pfx___split_vma+0x10/0x10 [ 38.824297] ? find_held_lock+0x2c/0x110 [ 38.824823] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.825399] ? lock_is_held_type+0x9f/0x120 [ 38.825948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.826562] ? mtree_range_walk+0x632/0x900 [ 38.827116] ? mas_walk+0x5c7/0x7c0 [ 38.827608] do_vmi_munmap+0x1f1/0x2b0 [ 38.828107] mmap_region+0x1f9/0x2660 [ 38.828596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.829110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.829823] ? __pfx_lock_acquire+0x10/0x10 [ 38.830359] ? __pfx_mmap_region+0x10/0x10 [ 38.830888] ? security_mmap_addr+0x7d/0xa0 [ 38.831432] ? get_unmapped_area+0x1f5/0x3f0 [ 38.831991] do_mmap+0x854/0xf00 [ 38.832439] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.832942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.833508] ksys_mmap_pgoff+0x3af/0x500 [ 38.834014] do_syscall_64+0x3f/0x90 [ 38.834505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.835161] RIP: 0033:0x7f5793a2cd82 [ 38.835646] 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 [ 38.837771] RSP: 002b:00007ffc8ca92a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.838676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5793a2cd82 [ 38.839525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5792e66000 [ 38.840379] RBP: 00007f5792e66000 R08: 0000000000000009 R09: 0000000000001000 [ 38.841229] R10: 0000000000000812 R11: 0000000000000206 R12: 000056044dc93ec0 [ 38.842065] R13: 00007ffc8ca92a50 R14: 00007ffc8ca92a80 R15: 00007ffc8ca92de0 [ 38.842918] [ 38.843210] [ 38.843427] Allocated by task 212: [ 38.843870] kasan_save_stack+0x22/0x50 [ 38.844373] kasan_set_track+0x25/0x30 [ 38.844870] __kasan_slab_alloc+0x59/0x70 [ 38.845409] kmem_cache_alloc+0x16b/0x370 [ 38.845929] vm_area_dup+0x20/0x160 [ 38.846382] __split_vma+0x170/0x950 [ 38.846847] split_vma+0xc6/0x110 [ 38.847295] mprotect_fixup+0x8d2/0xb30 [ 38.847816] do_mprotect_pkey+0x87e/0xd40 [ 38.848338] __x64_sys_mprotect+0x78/0xc0 [ 38.848863] do_syscall_64+0x3f/0x90 [ 38.849346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.849994] [ 38.850211] Freed by task 203: [ 38.850610] kasan_save_stack+0x22/0x50 [ 38.851112] kasan_set_track+0x25/0x30 [ 38.851621] kasan_save_free_info+0x2b/0x50 [ 38.852166] __kasan_slab_free+0x10a/0x190 [ 38.852701] kmem_cache_free+0x10d/0x4d0 [ 38.853216] rcu_core+0x8c8/0x2860 [ 38.853658] __do_softirq+0x1b7/0x7d4 [ 38.854145] [ 38.854366] Last potentially related work creation: [ 38.854952] kasan_save_stack+0x22/0x50 [ 38.855463] __kasan_record_aux_stack+0x8e/0xa0 [ 38.856043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.856685] remove_vma+0x139/0x170 [ 38.857141] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.857706] do_vmi_munmap+0x1f1/0x2b0 [ 38.858193] __vm_munmap+0x138/0x3a0 [ 38.858664] __x64_sys_munmap+0x59/0x80 [ 38.859169] do_syscall_64+0x3f/0x90 [ 38.859664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860318] [ 38.860534] Second to last potentially related work creation: [ 38.861218] kasan_save_stack+0x22/0x50 [ 38.861732] __kasan_record_aux_stack+0x8e/0xa0 [ 38.862311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.862949] remove_vma+0x139/0x170 [ 38.863426] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.864007] do_vmi_munmap+0x1f1/0x2b0 [ 38.864493] mmap_region+0x1f9/0x2660 [ 38.864972] do_mmap+0x854/0xf00 [ 38.865406] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.865894] ksys_mmap_pgoff+0x7d/0x500 [ 38.866382] do_syscall_64+0x3f/0x90 [ 38.866861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867508] [ 38.867743] The buggy address belongs to the object at ffff8880094d1740 [ 38.867743] which belongs to the cache vm_area_struct of size 168 [ 38.869220] The buggy address is located 88 bytes inside of [ 38.869220] freed 168-byte region [ffff8880094d1740, ffff8880094d17e8) [ 38.870635] [ 38.870852] The buggy address belongs to the physical page: [ 38.871508] page:000000007b47cde7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94d1 [ 38.872610] memcg:ffff88800d533e01 [ 38.873034] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.873684] page_type: 0xffffffff() [ 38.874135] raw: 0100000000000200 ffff8880087a0c80 ffffea0000397a00 dead000000000002 [ 38.875048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d533e01 [ 38.875966] page dumped because: kasan: bad access detected [ 38.876629] [ 38.876845] Memory state around the buggy address: [ 38.877428] ffff8880094d1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.878285] ffff8880094d1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.879146] >ffff8880094d1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.880009] ^ [ 38.880502] ffff8880094d1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.881366] ffff8880094d1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.882235] ================================================================== [ 38.883197] Disabling lock debugging due to kernel taint [ 41.017854] BUG: Bad rss-counter state mm:00000000cf8ee094 type:MM_FILEPAGES val:33 [ 41.018588] BUG: Bad rss-counter state mm:00000000cf8ee094 type:MM_ANONPAGES val:22 [ 41.438518] BUG: Bad rss-counter state mm:00000000571a3ed0 type:MM_FILEPAGES val:33 [ 41.439227] BUG: Bad rss-counter state mm:00000000571a3ed0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49351' (ECDSA) to the list of known hosts. 2023/06/21 05:24:15 fuzzer started 2023/06/21 05:24:15 dialing manager at localhost:36067 2023/06/21 05:24:15 checking machine... 2023/06/21 05:24:15 checking revisions... [ 42.099677] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:24:15 testing simple program... [ 42.133906] cgroup: Unknown subsys name 'net' [ 42.166801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:24:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffcc72f7838 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=00007f9a7a4fe510000055a73253e790 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=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88800f197410 R8 =0000000000000000 R9 =ffffed10010880f0 R10=ffff888008440783 R11=0000000000100000 R12=ffffea0000687e00 R13=ffff88801a1f8c00 R14=ffff888008441c80 R15=ffff888008440780 RIP=ffffffff8180f032 RFL=00000002 [-------] 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 00007fc682421900 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=00007ffdd79c2000 CR3=0000000016a4c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000