syzkaller login: [ 31.687793] BUG: Bad rss-counter state mm:0000000065f50fd2 type:MM_FILEPAGES val:33 [ 31.689092] BUG: Bad rss-counter state mm:0000000065f50fd2 type:MM_ANONPAGES val:22 [ 31.854976] ================================================================== [ 31.855903] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.856860] Read of size 8 at addr ffff88801a127d08 by task sshd/222 [ 31.857633] [ 31.857852] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.858834] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.859811] Call Trace: [ 31.860132] [ 31.860421] dump_stack_lvl+0x91/0xf0 [ 31.860912] print_report+0xcc/0x620 [ 31.861397] ? __virt_addr_valid+0x102/0x340 [ 31.861959] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862588] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.863228] kasan_report+0xbe/0xf0 [ 31.863708] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.864340] vma_interval_tree_remove+0xc75/0xec0 [ 31.864952] vma_prepare+0xc54/0x11a0 [ 31.865503] __split_vma+0x5af/0x950 [ 31.865981] ? __pfx___split_vma+0x10/0x10 [ 31.866542] ? find_held_lock+0x2c/0x110 [ 31.867075] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.867665] ? lock_is_held_type+0x9f/0x120 [ 31.868210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.868820] ? mtree_range_walk+0x632/0x900 [ 31.869369] ? mas_walk+0x5c7/0x7c0 [ 31.869849] do_vmi_munmap+0x1f1/0x2b0 [ 31.870442] mmap_region+0x1f9/0x2660 [ 31.871094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.871803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.872587] ? __pfx_lock_acquire+0x10/0x10 [ 31.873276] ? __pfx_mmap_region+0x10/0x10 [ 31.873990] ? security_mmap_addr+0x7d/0xa0 [ 31.874720] ? get_unmapped_area+0x1f5/0x3f0 [ 31.875334] do_mmap+0x854/0xf00 [ 31.875784] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.876316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.876890] ksys_mmap_pgoff+0x3af/0x500 [ 31.877478] do_syscall_64+0x3f/0x90 [ 31.877965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.878648] RIP: 0033:0x7fb7dee37d82 [ 31.879114] 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 [ 31.881245] RSP: 002b:00007ffda86e2cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.882156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7dee37d82 [ 31.883016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7de271000 [ 31.883878] RBP: 00007fb7de271000 R08: 0000000000000009 R09: 0000000000001000 [ 31.884725] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561183dfcec0 [ 31.885578] R13: 00007ffda86e2ce0 R14: 00007ffda86e2d10 R15: 00007ffda86e3070 [ 31.886441] [ 31.886734] [ 31.886947] Allocated by task 214: [ 31.887389] kasan_save_stack+0x22/0x50 [ 31.887900] kasan_set_track+0x25/0x30 [ 31.888408] __kasan_slab_alloc+0x59/0x70 [ 31.888951] kmem_cache_alloc+0x16b/0x370 [ 31.889523] vm_area_dup+0x20/0x160 [ 31.889983] __split_vma+0x170/0x950 [ 31.890464] split_vma+0xc6/0x110 [ 31.890906] mprotect_fixup+0x8d2/0xb30 [ 31.891458] do_mprotect_pkey+0x87e/0xd40 [ 31.891984] __x64_sys_mprotect+0x78/0xc0 [ 31.892521] do_syscall_64+0x3f/0x90 [ 31.893004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.893703] [ 31.893921] Freed by task 214: [ 31.894333] kasan_save_stack+0x22/0x50 [ 31.894849] kasan_set_track+0x25/0x30 [ 31.895397] kasan_save_free_info+0x2b/0x50 [ 31.895941] __kasan_slab_free+0x10a/0x190 [ 31.896501] kmem_cache_free+0x10d/0x4d0 [ 31.897025] rcu_core+0x8c8/0x2860 [ 31.897522] __do_softirq+0x1b7/0x7d4 [ 31.898032] [ 31.898323] Last potentially related work creation: [ 31.898940] kasan_save_stack+0x22/0x50 [ 31.899520] __kasan_record_aux_stack+0x8e/0xa0 [ 31.900177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.900825] remove_vma+0x139/0x170 [ 31.901297] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.901862] do_vmi_munmap+0x1f1/0x2b0 [ 31.902359] __vm_munmap+0x138/0x3a0 [ 31.902826] __x64_sys_munmap+0x59/0x80 [ 31.903374] do_syscall_64+0x3f/0x90 [ 31.903854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.904529] [ 31.904747] The buggy address belongs to the object at ffff88801a127cb0 [ 31.904747] which belongs to the cache vm_area_struct of size 168 [ 31.906215] The buggy address is located 88 bytes inside of [ 31.906215] freed 168-byte region [ffff88801a127cb0, ffff88801a127d58) [ 31.907626] [ 31.907843] The buggy address belongs to the physical page: [ 31.908496] page:000000007b072b84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a127 [ 31.909592] memcg:ffff88800cd40101 [ 31.910023] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.910672] page_type: 0xffffffff() [ 31.911124] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.912049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd40101 [ 31.912958] page dumped because: kasan: bad access detected [ 31.913619] [ 31.913833] Memory state around the buggy address: [ 31.914409] ffff88801a127c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.915282] ffff88801a127c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.916154] >ffff88801a127d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.917030] ^ [ 31.917467] ffff88801a127d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.918332] ffff88801a127e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.919193] ================================================================== [ 31.920250] Disabling lock debugging due to kernel taint [ 33.881088] BUG: Bad rss-counter state mm:000000007e45bb48 type:MM_FILEPAGES val:33 [ 33.882283] BUG: Bad rss-counter state mm:000000007e45bb48 type:MM_ANONPAGES val:22 [ 34.338753] BUG: Bad rss-counter state mm:000000002b0d734e type:MM_FILEPAGES val:33 [ 34.339912] BUG: Bad rss-counter state mm:000000002b0d734e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43309' (ECDSA) to the list of known hosts. 2023/06/20 22:08:08 fuzzer started 2023/06/20 22:08:09 dialing manager at localhost:36067 2023/06/20 22:08:09 checking machine... 2023/06/20 22:08:09 checking revisions... [ 34.971188] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:08:09 testing simple program... [ 35.016512] cgroup: Unknown subsys name 'net' [ 35.067865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:08:08 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002ef1f10 RSI=ffffffff8363b743 RDI=ffff88801778f8f0 RBP=ffff88801778f8c0 RSP=ffff88801778f820 R8 =0000000000000001 R9 =ffff88801778f868 R10=0000000000038001 R11=000000000008a966 R12=ffff88801778f8f0 R13=0000000000000000 R14=ffff8880181c51c0 R15=0000000000092cc0 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 00007f03bd59f900 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=00005611cc3bb568 CR3=0000000017526000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe118d7a28 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=00007f92773fe51000005621375a3790 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