syzkaller login: [ 33.163188] BUG: Bad rss-counter state mm:00000000941bf2cb type:MM_FILEPAGES val:33 [ 33.166622] BUG: Bad rss-counter state mm:00000000941bf2cb type:MM_ANONPAGES val:22 [ 33.315200] ================================================================== [ 33.316067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.316958] Read of size 8 at addr ffff888016998880 by task sshd/222 [ 33.317677] [ 33.317885] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.318874] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.319799] Call Trace: [ 33.320101] [ 33.320392] dump_stack_lvl+0x91/0xf0 [ 33.320852] print_report+0xcc/0x620 [ 33.321306] ? __virt_addr_valid+0x102/0x340 [ 33.321829] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.322414] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.322997] kasan_report+0xbe/0xf0 [ 33.323455] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.324066] vma_interval_tree_remove+0xc75/0xec0 [ 33.324661] vma_prepare+0xc54/0x11a0 [ 33.325143] __split_vma+0x5af/0x950 [ 33.325611] ? __pfx___split_vma+0x10/0x10 [ 33.326129] ? find_held_lock+0x2c/0x110 [ 33.326650] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.327204] ? lock_is_held_type+0x9f/0x120 [ 33.327742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.328341] ? mtree_range_walk+0x632/0x900 [ 33.328890] ? mas_walk+0x5c7/0x7c0 [ 33.329356] do_vmi_munmap+0x1f1/0x2b0 [ 33.329845] mmap_region+0x1f9/0x2660 [ 33.330321] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.330827] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.331537] ? __pfx_lock_acquire+0x10/0x10 [ 33.332059] ? __pfx_mmap_region+0x10/0x10 [ 33.332587] ? security_mmap_addr+0x7d/0xa0 [ 33.333116] ? get_unmapped_area+0x1f5/0x3f0 [ 33.333662] do_mmap+0x854/0xf00 [ 33.334086] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.334572] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.335122] ksys_mmap_pgoff+0x3af/0x500 [ 33.335635] do_syscall_64+0x3f/0x90 [ 33.336111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.336752] RIP: 0033:0x7f29d52cbd82 [ 33.337204] 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 [ 33.339328] RSP: 002b:00007ffeeed34048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.340217] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29d52cbd82 [ 33.341058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29d4705000 [ 33.341887] RBP: 00007f29d4705000 R08: 0000000000000009 R09: 0000000000001000 [ 33.342713] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fe7ce1ec0 [ 33.343558] R13: 00007ffeeed34060 R14: 00007ffeeed34090 R15: 00007ffeeed343f0 [ 33.344390] [ 33.344671] [ 33.344882] Allocated by task 215: [ 33.345302] kasan_save_stack+0x22/0x50 [ 33.345796] kasan_set_track+0x25/0x30 [ 33.346278] __kasan_slab_alloc+0x59/0x70 [ 33.346794] kmem_cache_alloc+0x16b/0x370 [ 33.347331] vm_area_dup+0x20/0x160 [ 33.347782] __split_vma+0x170/0x950 [ 33.348236] split_vma+0xc6/0x110 [ 33.348671] mprotect_fixup+0x8d2/0xb30 [ 33.349159] do_mprotect_pkey+0x87e/0xd40 [ 33.349668] __x64_sys_mprotect+0x78/0xc0 [ 33.350183] do_syscall_64+0x3f/0x90 [ 33.350654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.351291] [ 33.351501] Freed by task 215: [ 33.351886] kasan_save_stack+0x22/0x50 [ 33.352391] kasan_set_track+0x25/0x30 [ 33.352877] kasan_save_free_info+0x2b/0x50 [ 33.353400] __kasan_slab_free+0x10a/0x190 [ 33.353919] kmem_cache_free+0x10d/0x4d0 [ 33.354416] rcu_core+0x8c8/0x2860 [ 33.354849] __do_softirq+0x1b7/0x7d4 [ 33.355340] [ 33.355557] Last potentially related work creation: [ 33.356128] kasan_save_stack+0x22/0x50 [ 33.356624] __kasan_record_aux_stack+0x8e/0xa0 [ 33.357184] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.357818] remove_vma+0x139/0x170 [ 33.358267] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.358811] do_vmi_munmap+0x1f1/0x2b0 [ 33.359292] __vm_munmap+0x138/0x3a0 [ 33.359837] __x64_sys_munmap+0x59/0x80 [ 33.360349] do_syscall_64+0x3f/0x90 [ 33.360827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.361481] [ 33.361697] The buggy address belongs to the object at ffff888016998828 [ 33.361697] which belongs to the cache vm_area_struct of size 168 [ 33.363184] The buggy address is located 88 bytes inside of [ 33.363184] freed 168-byte region [ffff888016998828, ffff8880169988d0) [ 33.364600] [ 33.364816] The buggy address belongs to the physical page: [ 33.365467] page:000000002c654458 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16998 [ 33.366545] memcg:ffff888016beff01 [ 33.366966] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.367633] page_type: 0xffffffff() [ 33.368080] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.368994] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016beff01 [ 33.369894] page dumped because: kasan: bad access detected [ 33.370553] [ 33.370763] Memory state around the buggy address: [ 33.371340] ffff888016998780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.372193] ffff888016998800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.373030] >ffff888016998880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.373865] ^ [ 33.374271] ffff888016998900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.375104] ffff888016998980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.375967] ================================================================== [ 33.376884] Disabling lock debugging due to kernel taint [ 35.730015] BUG: Bad rss-counter state mm:0000000054bb2c9c type:MM_FILEPAGES val:33 [ 35.731002] BUG: Bad rss-counter state mm:0000000054bb2c9c type:MM_ANONPAGES val:22 [ 36.184219] BUG: Bad rss-counter state mm:000000000bae6025 type:MM_FILEPAGES val:33 [ 36.185448] BUG: Bad rss-counter state mm:000000000bae6025 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12670' (ECDSA) to the list of known hosts. 2023/06/19 15:50:50 fuzzer started 2023/06/19 15:50:50 dialing manager at localhost:44161 2023/06/19 15:50:50 checking machine... 2023/06/19 15:50:50 checking revisions... [ 36.816194] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:50:50 testing simple program... [ 36.860556] cgroup: Unknown subsys name 'net' [ 36.911383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:50:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88806ce39518 RBP=ffff888019fdfb88 RSP=ffff888019fdfa28 R8 =0000000000000001 R9 =ffffed10033fbf3d R10=0000000000000003 R11=0000000000000000 R12=ffffffff85d3d010 R13=ffff888013e83680 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812c26b7 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 00007fbf5a5ea700 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=00007f87097fd0b0 CR3=000000000dc24000 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=2030353a30353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a30353a3531203931 XMM08=3d656e696c646d632022656369767265 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=00007fd9eff9f6d0 CR3=0000000009b60000 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=c01fbab2337f81b10b4a44112c3fddca XMM02=000000000011c4e8ec2efd57dc4c00df XMM03=0000000000123a285b8fe69cf4760753 XMM04=aef66b39e4aa446300000000000ae988 XMM05=086018f6549d64630000000000133a00 XMM06=00c3ffa147b8d85700000000001333f8 XMM07=e042d86d42eb936e0000000000123ca8 XMM08=5b8fe69cf4760753000000000011c548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000