syzkaller login: [ 40.494788] BUG: Bad rss-counter state mm:00000000c8147018 type:MM_FILEPAGES val:33 [ 40.495729] BUG: Bad rss-counter state mm:00000000c8147018 type:MM_ANONPAGES val:22 [ 40.655100] ================================================================== [ 40.656027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.656984] Read of size 8 at addr ffff888018c68df0 by task sshd/221 [ 40.657751] [ 40.657983] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.658992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.659970] Call Trace: [ 40.660288] [ 40.660590] dump_stack_lvl+0x91/0xf0 [ 40.661109] print_report+0xcc/0x620 [ 40.661595] ? __virt_addr_valid+0x102/0x340 [ 40.662151] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.662793] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.663412] kasan_report+0xbe/0xf0 [ 40.663894] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.664524] vma_interval_tree_remove+0xc75/0xec0 [ 40.665160] vma_prepare+0xc54/0x11a0 [ 40.665657] __split_vma+0x5af/0x950 [ 40.666174] ? __pfx___split_vma+0x10/0x10 [ 40.666736] ? find_held_lock+0x2c/0x110 [ 40.667294] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.667892] ? lock_is_held_type+0x9f/0x120 [ 40.668458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.669101] ? mtree_range_walk+0x632/0x900 [ 40.669671] ? mas_walk+0x5c7/0x7c0 [ 40.670184] do_vmi_munmap+0x1f1/0x2b0 [ 40.670709] mmap_region+0x1f9/0x2660 [ 40.671220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.671752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.672505] ? __pfx_lock_acquire+0x10/0x10 [ 40.673068] ? __pfx_mmap_region+0x10/0x10 [ 40.673622] ? security_mmap_addr+0x7d/0xa0 [ 40.674194] ? get_unmapped_area+0x1f5/0x3f0 [ 40.674793] do_mmap+0x854/0xf00 [ 40.675277] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.675793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.676396] ksys_mmap_pgoff+0x3af/0x500 [ 40.676926] do_syscall_64+0x3f/0x90 [ 40.677409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.678085] RIP: 0033:0x7f024d5cdd82 [ 40.678555] 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 [ 40.680802] RSP: 002b:00007ffcd8b55b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.681755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f024d5cdd82 [ 40.682662] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f024ca07000 [ 40.683553] RBP: 00007f024ca07000 R08: 0000000000000009 R09: 0000000000001000 [ 40.684434] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2e398cec0 [ 40.685329] R13: 00007ffcd8b55b50 R14: 00007ffcd8b55b80 R15: 00007ffcd8b55ee0 [ 40.686206] [ 40.686499] [ 40.686735] Allocated by task 213: [ 40.687187] kasan_save_stack+0x22/0x50 [ 40.687691] kasan_set_track+0x25/0x30 [ 40.688211] __kasan_slab_alloc+0x59/0x70 [ 40.688737] kmem_cache_alloc+0x16b/0x370 [ 40.689278] vm_area_dup+0x20/0x160 [ 40.689750] __split_vma+0x170/0x950 [ 40.690243] split_vma+0xc6/0x110 [ 40.690704] mprotect_fixup+0x8d2/0xb30 [ 40.691242] do_mprotect_pkey+0x87e/0xd40 [ 40.691782] __x64_sys_mprotect+0x78/0xc0 [ 40.692339] do_syscall_64+0x3f/0x90 [ 40.692833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.693530] [ 40.693757] Freed by task 19: [ 40.694174] kasan_save_stack+0x22/0x50 [ 40.694749] kasan_set_track+0x25/0x30 [ 40.695262] kasan_save_free_info+0x2b/0x50 [ 40.695809] __kasan_slab_free+0x10a/0x190 [ 40.696377] kmem_cache_free+0x10d/0x4d0 [ 40.696909] rcu_core+0x8c8/0x2860 [ 40.697370] __do_softirq+0x1b7/0x7d4 [ 40.697850] [ 40.698080] Last potentially related work creation: [ 40.698696] kasan_save_stack+0x22/0x50 [ 40.699296] __kasan_record_aux_stack+0x8e/0xa0 [ 40.699882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.700551] remove_vma+0x139/0x170 [ 40.701026] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.701584] do_vmi_munmap+0x1f1/0x2b0 [ 40.702079] __vm_munmap+0x138/0x3a0 [ 40.702559] __x64_sys_munmap+0x59/0x80 [ 40.703100] do_syscall_64+0x3f/0x90 [ 40.703591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.704260] [ 40.704472] The buggy address belongs to the object at ffff888018c68d98 [ 40.704472] which belongs to the cache vm_area_struct of size 168 [ 40.705983] The buggy address is located 88 bytes inside of [ 40.705983] freed 168-byte region [ffff888018c68d98, ffff888018c68e40) [ 40.707405] [ 40.707623] The buggy address belongs to the physical page: [ 40.708289] page:000000008b5ea99c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c68 [ 40.709447] memcg:ffff88801a075c01 [ 40.709899] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.710554] page_type: 0xffffffff() [ 40.711034] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.711968] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a075c01 [ 40.712890] page dumped because: kasan: bad access detected [ 40.713551] [ 40.713770] Memory state around the buggy address: [ 40.714394] ffff888018c68c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 40.715317] ffff888018c68d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 40.716201] >ffff888018c68d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.717067] ^ [ 40.717890] ffff888018c68e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.718772] ffff888018c68e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.719663] ================================================================== [ 40.720841] Disabling lock debugging due to kernel taint [ 42.802298] BUG: Bad rss-counter state mm:000000000e64f1c8 type:MM_FILEPAGES val:33 [ 42.803381] BUG: Bad rss-counter state mm:000000000e64f1c8 type:MM_ANONPAGES val:22 [ 43.351790] BUG: Bad rss-counter state mm:0000000014007879 type:MM_FILEPAGES val:33 [ 43.352954] BUG: Bad rss-counter state mm:0000000014007879 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6765' (ECDSA) to the list of known hosts. 2023/06/20 00:29:09 fuzzer started 2023/06/20 00:29:09 dialing manager at localhost:44161 2023/06/20 00:29:09 checking machine... 2023/06/20 00:29:09 checking revisions... [ 43.999975] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:29:09 testing simple program... [ 44.048005] cgroup: Unknown subsys name 'net' [ 44.087960] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:28:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39518 RCX=ffffffff8107f626 RDX=1ffff1100204e368 RSI=0000000000000008 RDI=ffff888010271b40 RBP=ffff88800e1af6a8 RSP=ffff88800e1af668 R8 =0000000000000001 R9 =ffffed10028676d0 R10=ffff88801433b687 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff888010271b40 R14=ffff8880141f3b28 R15=ffff88806ce39500 RIP=ffffffff81233edd RFL=00000086 [--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 00007f128821d700 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=00007f8b6d080ca0 CR3=0000000019f60000 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=3921d7c7d7dae4bb6e484fd40efefbb7 XMM02=0000000000120040eff9b2d0a8fce9cb XMM03=00000000001201102c67c8bc2e329bc3 XMM04=20a271e2f00e79be00000000000ae988 XMM05=b2fd39a3d471bd0800000000001354c0 XMM06=c291bd5c70af25b900000000001342b0 XMM07=fb795ef6d65770560000000000124818 XMM08=2c67c8bc2e329bc300000000001200b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81807f5b RCX=0000000000000001 RDX=1ffff11002f90f57 RSI=ffff888017c87cb0 RDI=ffffffff81807f5b RBP=ffffffff81807f5b RSP=ffff888017c87a10 R8 =0000000000000001 R9 =ffff888017c87aa0 R10=0000000000038001 R11=0000000000021ee6 R12=0000000000000001 R13=0000000000000000 R14=ffff88800f331b40 R15=ffff88800e3895f0 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f37ce34d900 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=00007f37ce902650 CR3=000000001bad4000 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=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