syzkaller login: [ 31.164783] BUG: Bad rss-counter state mm:000000008e0b8a42 type:MM_FILEPAGES val:33 [ 31.165998] BUG: Bad rss-counter state mm:000000008e0b8a42 type:MM_ANONPAGES val:22 [ 31.347989] ================================================================== [ 31.349057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.350249] Read of size 8 at addr ffff88800e3d4df0 by task sshd/219 [ 31.351117] [ 31.351368] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.352367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.353494] Call Trace: [ 31.353860] [ 31.354181] dump_stack_lvl+0x91/0xf0 [ 31.354746] print_report+0xcc/0x620 [ 31.355300] ? __virt_addr_valid+0x102/0x340 [ 31.355939] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357364] kasan_report+0xbe/0xf0 [ 31.357907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358614] vma_interval_tree_remove+0xc75/0xec0 [ 31.359300] vma_prepare+0xc54/0x11a0 [ 31.359854] __split_vma+0x5af/0x950 [ 31.360392] ? __pfx___split_vma+0x10/0x10 [ 31.360992] ? find_held_lock+0x2c/0x110 [ 31.361600] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.362239] ? lock_is_held_type+0x9f/0x120 [ 31.362852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.363539] ? mtree_range_walk+0x632/0x900 [ 31.364165] ? mas_walk+0x5c7/0x7c0 [ 31.364705] do_vmi_munmap+0x1f1/0x2b0 [ 31.365277] mmap_region+0x1f9/0x2660 [ 31.365821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.366415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.367220] ? __pfx_lock_acquire+0x10/0x10 [ 31.367825] ? __pfx_mmap_region+0x10/0x10 [ 31.368430] ? security_mmap_addr+0x7d/0xa0 [ 31.369036] ? get_unmapped_area+0x1f5/0x3f0 [ 31.369691] do_mmap+0x854/0xf00 [ 31.370191] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.370755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.371395] ksys_mmap_pgoff+0x3af/0x500 [ 31.371979] do_syscall_64+0x3f/0x90 [ 31.372528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373278] RIP: 0033:0x7f552c3c8d82 [ 31.373805] 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 [ 31.376231] RSP: 002b:00007ffeb8db6be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.377279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f552c3c8d82 [ 31.378253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f552b802000 [ 31.379214] RBP: 00007f552b802000 R08: 0000000000000009 R09: 0000000000001000 [ 31.380177] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555844d47f70 [ 31.381155] R13: 00007ffeb8db6c00 R14: 00007ffeb8db6c30 R15: 00007ffeb8db6f90 [ 31.382128] [ 31.382461] [ 31.382703] Allocated by task 212: [ 31.383192] kasan_save_stack+0x22/0x50 [ 31.383765] kasan_set_track+0x25/0x30 [ 31.384327] __kasan_slab_alloc+0x59/0x70 [ 31.384926] kmem_cache_alloc+0x16b/0x370 [ 31.385541] vm_area_dup+0x20/0x160 [ 31.386047] __split_vma+0x170/0x950 [ 31.386571] split_vma+0xc6/0x110 [ 31.387059] mprotect_fixup+0x8d2/0xb30 [ 31.387624] do_mprotect_pkey+0x87e/0xd40 [ 31.388206] __x64_sys_mprotect+0x78/0xc0 [ 31.388784] do_syscall_64+0x3f/0x90 [ 31.389313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390026] [ 31.390263] Freed by task 202: [ 31.390700] kasan_save_stack+0x22/0x50 [ 31.391256] kasan_set_track+0x25/0x30 [ 31.391809] kasan_save_free_info+0x2b/0x50 [ 31.392402] __kasan_slab_free+0x10a/0x190 [ 31.392995] kmem_cache_free+0x10d/0x4d0 [ 31.393578] rcu_core+0x8c8/0x2860 [ 31.394074] __do_softirq+0x1b7/0x7d4 [ 31.394604] [ 31.394843] Last potentially related work creation: [ 31.395488] kasan_save_stack+0x22/0x50 [ 31.396045] __kasan_record_aux_stack+0x8e/0xa0 [ 31.396684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.397397] remove_vma+0x139/0x170 [ 31.397909] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.398537] do_vmi_munmap+0x1f1/0x2b0 [ 31.399090] __vm_munmap+0x138/0x3a0 [ 31.399620] __x64_sys_munmap+0x59/0x80 [ 31.400183] do_syscall_64+0x3f/0x90 [ 31.400724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401466] [ 31.401709] Second to last potentially related work creation: [ 31.402491] kasan_save_stack+0x22/0x50 [ 31.403060] __kasan_record_aux_stack+0x8e/0xa0 [ 31.403713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.404436] remove_vma+0x139/0x170 [ 31.404946] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.405596] do_vmi_munmap+0x1f1/0x2b0 [ 31.406143] __vm_munmap+0x138/0x3a0 [ 31.406671] __x64_sys_munmap+0x59/0x80 [ 31.407231] do_syscall_64+0x3f/0x90 [ 31.407768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.408500] [ 31.408744] The buggy address belongs to the object at ffff88800e3d4d98 [ 31.408744] which belongs to the cache vm_area_struct of size 168 [ 31.410412] The buggy address is located 88 bytes inside of [ 31.410412] freed 168-byte region [ffff88800e3d4d98, ffff88800e3d4e40) [ 31.411998] [ 31.412243] The buggy address belongs to the physical page: [ 31.412998] page:0000000076d413d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3d4 [ 31.414227] memcg:ffff88800df12701 [ 31.414712] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.415504] page_type: 0xffffffff() [ 31.416017] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.417057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df12701 [ 31.418107] page dumped because: kasan: bad access detected [ 31.418854] [ 31.419097] Memory state around the buggy address: [ 31.419758] ffff88800e3d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.420729] ffff88800e3d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.421705] >ffff88800e3d4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.422665] ^ [ 31.423578] ffff88800e3d4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.424543] ffff88800e3d4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.425506] ================================================================== [ 31.426875] Disabling lock debugging due to kernel taint [ 33.506202] BUG: Bad rss-counter state mm:000000004f7b1425 type:MM_FILEPAGES val:33 [ 33.507372] BUG: Bad rss-counter state mm:000000004f7b1425 type:MM_ANONPAGES val:22 [ 33.918350] BUG: Bad rss-counter state mm:000000006bd57ee7 type:MM_FILEPAGES val:33 [ 33.919353] BUG: Bad rss-counter state mm:000000006bd57ee7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39705' (ECDSA) to the list of known hosts. 2023/06/20 11:25:58 fuzzer started 2023/06/20 11:25:58 dialing manager at localhost:36067 2023/06/20 11:25:58 checking machine... 2023/06/20 11:25:58 checking revisions... [ 34.662891] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:25:58 testing simple program... [ 34.707772] cgroup: Unknown subsys name 'net' [ 34.756471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:25:58 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=00007ffe01f686e8 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=00007f50e637f510000055680f240790 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=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888016f0d1c0 RSI=ffff888019e6b1d0 RDI=0000000000000007 RBP=ffff88800c80ff58 RSP=ffff88800c80fed0 R8 =0000000000000006 R9 =00007fbe92ed6000 R10=00007fbe92ed6044 R11=0000000000000000 R12=0000000000000007 R13=00007fbe92ed6044 R14=ffff888019e6b1d0 R15=ffff88801611c0c0 RIP=ffffffff8113aed0 RFL=00000293 [--S-A-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbe92382900 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=00007fbe92ed6044 CR3=000000001a308000 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=00000000000000000000000000000000 XMM02=1490a6b70e652032088b501a9412a462 XMM03=f2bf20d0bb4fea88f590ae57fc25b6c9 XMM04=433f92d2d8d6d69309873be603a1a2e4 XMM05=00000000000000000000000000000000 XMM06=433f20d0bb4fd68809873b570325a2c9 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000