syzkaller login: [ 68.823458] BUG: Bad rss-counter state mm:00000000c1bf5ab3 type:MM_FILEPAGES val:33 [ 68.824137] BUG: Bad rss-counter state mm:00000000c1bf5ab3 type:MM_ANONPAGES val:22 [ 68.908951] ================================================================== [ 68.909558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.910171] Read of size 8 at addr ffff88800eea3798 by task sshd/224 [ 68.910767] [ 68.910905] CPU: 1 PID: 224 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 68.911532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.912151] Call Trace: [ 68.912348] [ 68.912522] dump_stack_lvl+0x91/0xf0 [ 68.912833] print_report+0xcc/0x620 [ 68.913138] ? __virt_addr_valid+0x102/0x340 [ 68.913482] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.913863] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.914244] kasan_report+0xbe/0xf0 [ 68.918566] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.918999] vma_interval_tree_remove+0xc75/0xec0 [ 68.919371] vma_prepare+0xc54/0x11a0 [ 68.919668] __split_vma+0x5af/0x950 [ 68.919966] ? __pfx___split_vma+0x10/0x10 [ 68.920289] ? find_held_lock+0x2c/0x110 [ 68.920613] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.920989] ? lock_is_held_type+0x9f/0x120 [ 68.921322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.921695] ? mtree_range_walk+0x632/0x900 [ 68.922078] ? mas_walk+0x5c7/0x7c0 [ 68.922767] do_vmi_munmap+0x1f1/0x2b0 [ 68.923079] mmap_region+0x1f9/0x2660 [ 68.923376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.923691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.924173] ? __pfx_lock_acquire+0x10/0x10 [ 68.924503] ? __pfx_mmap_region+0x10/0x10 [ 68.924832] ? security_mmap_addr+0x7d/0xa0 [ 68.925162] ? get_unmapped_area+0x1f5/0x3f0 [ 68.925501] do_mmap+0x854/0xf00 [ 68.925807] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.926113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.926502] ksys_mmap_pgoff+0x3af/0x500 [ 68.926844] do_syscall_64+0x3f/0x90 [ 68.927158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.927556] RIP: 0033:0x7f5279b04d82 [ 68.927844] 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 [ 68.929148] RSP: 002b:00007ffd61fe9418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.929702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5279b04d82 [ 68.930230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5278f3e000 [ 68.931889] RBP: 00007f5278f3e000 R08: 0000000000000009 R09: 0000000000001000 [ 68.932427] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c541e2d90 [ 68.933014] R13: 00007ffd61fe9430 R14: 00007ffd61fe9460 R15: 00007ffd61fe97c0 [ 68.933563] [ 68.933782] [ 68.933927] Allocated by task 217: [ 68.934206] kasan_save_stack+0x22/0x50 [ 68.934552] kasan_set_track+0x25/0x30 [ 68.934907] __kasan_slab_alloc+0x59/0x70 [ 68.935254] kmem_cache_alloc+0x16b/0x370 [ 68.935590] vm_area_dup+0x20/0x160 [ 68.935886] __split_vma+0x170/0x950 [ 68.936183] split_vma+0xc6/0x110 [ 68.936466] mprotect_fixup+0x8d2/0xb30 [ 68.936812] do_mprotect_pkey+0x87e/0xd40 [ 68.937141] __x64_sys_mprotect+0x78/0xc0 [ 68.937469] do_syscall_64+0x3f/0x90 [ 68.937786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.938232] [ 68.938382] Freed by task 13: [ 68.938634] kasan_save_stack+0x22/0x50 [ 68.938988] kasan_set_track+0x25/0x30 [ 68.939304] kasan_save_free_info+0x2b/0x50 [ 68.939642] __kasan_slab_free+0x10a/0x190 [ 68.940032] kmem_cache_free+0x10d/0x4d0 [ 68.940358] rcu_core+0x8c8/0x2860 [ 68.940648] __do_softirq+0x1b7/0x7d4 [ 68.940950] [ 68.941084] Last potentially related work creation: [ 68.941458] kasan_save_stack+0x22/0x50 [ 68.941824] __kasan_record_aux_stack+0x8e/0xa0 [ 68.942198] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.946780] remove_vma+0x139/0x170 [ 68.947089] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.947457] do_vmi_munmap+0x1f1/0x2b0 [ 68.948433] __vm_munmap+0x138/0x3a0 [ 68.949239] __x64_sys_munmap+0x59/0x80 [ 68.950099] do_syscall_64+0x3f/0x90 [ 68.950937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.952151] [ 68.952510] The buggy address belongs to the object at ffff88800eea3740 [ 68.952510] which belongs to the cache vm_area_struct of size 168 [ 68.955296] The buggy address is located 88 bytes inside of [ 68.955296] freed 168-byte region [ffff88800eea3740, ffff88800eea37e8) [ 68.958249] [ 68.958627] The buggy address belongs to the physical page: [ 68.959907] page:000000007cb92170 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeea3 [ 68.962117] memcg:ffff88800e05b501 [ 68.962927] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.964158] page_type: 0xffffffff() [ 68.964478] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 68.965067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e05b501 [ 68.968320] page dumped because: kasan: bad access detected [ 68.968747] [ 68.968908] Memory state around the buggy address: [ 68.969292] ffff88800eea3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.969854] ffff88800eea3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 68.970442] >ffff88800eea3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 68.970998] ^ [ 68.971314] ffff88800eea3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 68.971845] ffff88800eea3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 68.972374] ================================================================== [ 68.973177] Disabling lock debugging due to kernel taint [ 73.702490] BUG: Bad rss-counter state mm:00000000af8a5f48 type:MM_FILEPAGES val:33 [ 73.703175] BUG: Bad rss-counter state mm:00000000af8a5f48 type:MM_ANONPAGES val:22 [ 74.642693] BUG: Bad rss-counter state mm:000000007866f736 type:MM_FILEPAGES val:33 [ 74.643371] BUG: Bad rss-counter state mm:000000007866f736 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38870' (ECDSA) to the list of known hosts. 2023/06/20 10:10:23 fuzzer started 2023/06/20 10:10:23 dialing manager at localhost:44161 2023/06/20 10:10:23 checking machine... 2023/06/20 10:10:23 checking revisions... [ 75.551230] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:10:23 testing simple program... [ 75.599932] cgroup: Unknown subsys name 'net' [ 75.731744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:53 Registers: info registers vcpu 0 RAX=1ffffffff0bb2e14 RBX=ffffffff85d970a4 RCX=ffffffff81187bee RDX=0000000000000000 RSI=ffffffff8609eefe RDI=ffffffff85d970a0 RBP=ffffffff85d970a0 RSP=ffff888017fcf790 R8 =ffffffff8609eefe R9 =ffff888017fcf888 R10=0000000000038001 R11=0000000000007733 R12=ffffffff85d970a8 R13=ffffffff85d970a0 R14=ffffffff85d970a0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 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=00007f5079695328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007ffc63025a78 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=00007f5ef4671510000055b3120af790 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