syzkaller login: [ 31.238543] BUG: Bad rss-counter state mm:000000004ad67bc4 type:MM_FILEPAGES val:33 [ 31.239811] BUG: Bad rss-counter state mm:000000004ad67bc4 type:MM_ANONPAGES val:22 [ 31.280923] ================================================================== [ 31.282038] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.283265] Read of size 8 at addr ffff88800e3976b0 by task sshd/220 [ 31.284197] [ 31.284439] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.285451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.286646] Call Trace: [ 31.287012] [ 31.287339] dump_stack_lvl+0x91/0xf0 [ 31.287904] print_report+0xcc/0x620 [ 31.288449] ? __virt_addr_valid+0x102/0x340 [ 31.289111] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289820] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290525] kasan_report+0xbe/0xf0 [ 31.291067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291807] vma_interval_tree_remove+0xc75/0xec0 [ 31.292521] vma_prepare+0xc54/0x11a0 [ 31.293079] __split_vma+0x5af/0x950 [ 31.293620] ? __pfx___split_vma+0x10/0x10 [ 31.294242] ? find_held_lock+0x2c/0x110 [ 31.294848] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.295479] ? lock_is_held_type+0x9f/0x120 [ 31.296098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.296806] ? mtree_range_walk+0x632/0x900 [ 31.297441] ? mas_walk+0x5c7/0x7c0 [ 31.298006] do_vmi_munmap+0x1f1/0x2b0 [ 31.298594] mmap_region+0x1f9/0x2660 [ 31.299166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.299761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.300593] ? __pfx_lock_acquire+0x10/0x10 [ 31.301210] ? __pfx_mmap_region+0x10/0x10 [ 31.301820] ? security_mmap_addr+0x7d/0xa0 [ 31.302425] ? get_unmapped_area+0x1f5/0x3f0 [ 31.303086] do_mmap+0x854/0xf00 [ 31.303571] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.304137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304775] ksys_mmap_pgoff+0x3af/0x500 [ 31.305347] do_syscall_64+0x3f/0x90 [ 31.305883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306613] RIP: 0033:0x7f82ec682d82 [ 31.307131] 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 [ 31.309698] RSP: 002b:00007ffcfbc073c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.310726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82ec682d82 [ 31.311701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82ebabc000 [ 31.312710] RBP: 00007f82ebabc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.313722] R10: 0000000000000812 R11: 0000000000000206 R12: 000055899ec78d90 [ 31.314718] R13: 00007ffcfbc073e0 R14: 00007ffcfbc07410 R15: 00007ffcfbc07770 [ 31.315698] [ 31.316028] [ 31.316271] Allocated by task 213: [ 31.316763] kasan_save_stack+0x22/0x50 [ 31.317335] kasan_set_track+0x25/0x30 [ 31.317911] __kasan_slab_alloc+0x59/0x70 [ 31.318536] kmem_cache_alloc+0x16b/0x370 [ 31.319138] vm_area_dup+0x20/0x160 [ 31.319650] __split_vma+0x170/0x950 [ 31.320199] split_vma+0xc6/0x110 [ 31.320731] mprotect_fixup+0x8d2/0xb30 [ 31.321269] do_mprotect_pkey+0x87e/0xd40 [ 31.321829] __x64_sys_mprotect+0x78/0xc0 [ 31.322381] do_syscall_64+0x3f/0x90 [ 31.322883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323567] [ 31.323795] Freed by task 213: [ 31.324215] kasan_save_stack+0x22/0x50 [ 31.324752] kasan_set_track+0x25/0x30 [ 31.325275] kasan_save_free_info+0x2b/0x50 [ 31.325897] __kasan_slab_free+0x10a/0x190 [ 31.326466] kmem_cache_free+0x10d/0x4d0 [ 31.327003] rcu_core+0x8c8/0x2860 [ 31.327478] __do_softirq+0x1b7/0x7d4 [ 31.327980] [ 31.328208] Last potentially related work creation: [ 31.328847] kasan_save_stack+0x22/0x50 [ 31.329379] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330672] remove_vma+0x139/0x170 [ 31.331156] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331751] do_vmi_munmap+0x1f1/0x2b0 [ 31.332270] __vm_munmap+0x138/0x3a0 [ 31.332773] __x64_sys_munmap+0x59/0x80 [ 31.333307] do_syscall_64+0x3f/0x90 [ 31.333809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334498] [ 31.334730] Second to last potentially related work creation: [ 31.335464] kasan_save_stack+0x22/0x50 [ 31.336008] __kasan_record_aux_stack+0x8e/0xa0 [ 31.336623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.337331] remove_vma+0x139/0x170 [ 31.337812] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.338406] do_vmi_munmap+0x1f1/0x2b0 [ 31.338920] mmap_region+0x1f9/0x2660 [ 31.339428] do_mmap+0x854/0xf00 [ 31.339890] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.340402] ksys_mmap_pgoff+0x3af/0x500 [ 31.340935] do_syscall_64+0x3f/0x90 [ 31.341436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342117] [ 31.342344] The buggy address belongs to the object at ffff88800e397658 [ 31.342344] which belongs to the cache vm_area_struct of size 168 [ 31.343891] The buggy address is located 88 bytes inside of [ 31.343891] freed 168-byte region [ffff88800e397658, ffff88800e397700) [ 31.345365] [ 31.345595] The buggy address belongs to the physical page: [ 31.346292] page:0000000079fe2105 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe397 [ 31.347456] memcg:ffff88800e9ed101 [ 31.347926] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.348715] page_type: 0xffffffff() [ 31.349226] raw: 0100000000000200 ffff8880087a0c80 ffffea00003677c0 dead000000000003 [ 31.350243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9ed101 [ 31.351249] page dumped because: kasan: bad access detected [ 31.351984] [ 31.352222] Memory state around the buggy address: [ 31.352875] ffff88800e397580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.353822] ffff88800e397600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.354806] >ffff88800e397680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.355758] ^ [ 31.356405] ffff88800e397700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.357376] ffff88800e397780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.358324] ================================================================== [ 31.359364] Disabling lock debugging due to kernel taint [ 33.502973] BUG: Bad rss-counter state mm:000000002b80a0b0 type:MM_FILEPAGES val:33 [ 33.503834] BUG: Bad rss-counter state mm:000000002b80a0b0 type:MM_ANONPAGES val:22 [ 33.877948] BUG: Bad rss-counter state mm:000000004a00e84a type:MM_FILEPAGES val:33 [ 33.878970] BUG: Bad rss-counter state mm:000000004a00e84a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15273' (ECDSA) to the list of known hosts. 2023/06/21 09:24:54 fuzzer started 2023/06/21 09:24:54 dialing manager at localhost:36067 2023/06/21 09:24:54 checking machine... 2023/06/21 09:24:54 checking revisions... [ 34.533115] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:24:54 testing simple program... [ 34.575661] cgroup: Unknown subsys name 'net' [ 34.614881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007fd85cc102fd RSP=ffff88800d9b7460 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fd85cc102fd R13=0000000000000000 R14=ffff888014693680 R15=ffff88800d9b7d36 RIP=ffffffff814c8496 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 00007fd85c346900 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=00007f3fe6b8b650 CR3=000000000daa6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=2a91f565532dde2b00000000000ae988 XMM05=410ad66629dc935b0000000000133dc0 XMM06=4fda316b135da52b0000000000132bb0 XMM07=fb795ef6d65770560000000000121b00 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a81e40 RBX=ffff88806cf39500 RCX=1ffffffff0a58001 RDX=dffffc0000000000 RSI=ffff888008d951c0 RDI=ffff88806cf39500 RBP=ffff88806cf09dc8 RSP=ffff88806cf09d58 R8 =ffff88806cf39f40 R9 =ffffed100d9e13a3 R10=0000000000000003 R11=ffff88806cf09ff8 R12=00000000fffbeed6 R13=ffff88806cf3a0b8 R14=0000000000000001 R15=ffff888008d951c0 RIP=ffffffff812aeb8c 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=00007ffc01b6d698 CR3=0000000005482000 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=00007fed890a5510000055a44163d790 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