syzkaller login: [ 36.563430] BUG: Bad rss-counter state mm:000000004f1aeb37 type:MM_FILEPAGES val:33 [ 36.564443] BUG: Bad rss-counter state mm:000000004f1aeb37 type:MM_ANONPAGES val:22 [ 36.743490] ================================================================== [ 36.744596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.745793] Read of size 8 at addr ffff88800c59e880 by task sshd/218 [ 36.746644] [ 36.746873] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.747791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.748819] Call Trace: [ 36.749150] [ 36.749452] dump_stack_lvl+0x91/0xf0 [ 36.749967] print_report+0xcc/0x620 [ 36.750462] ? __virt_addr_valid+0x102/0x340 [ 36.751040] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.751677] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.752311] kasan_report+0xbe/0xf0 [ 36.752813] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.753450] vma_interval_tree_remove+0xc75/0xec0 [ 36.754072] vma_prepare+0xc54/0x11a0 [ 36.754571] __split_vma+0x5af/0x950 [ 36.755089] ? __pfx___split_vma+0x10/0x10 [ 36.755635] ? find_held_lock+0x2c/0x110 [ 36.756171] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.756757] ? lock_is_held_type+0x9f/0x120 [ 36.757317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.757948] ? mtree_range_walk+0x632/0x900 [ 36.758518] ? mas_walk+0x5c7/0x7c0 [ 36.759022] do_vmi_munmap+0x1f1/0x2b0 [ 36.759534] mmap_region+0x1f9/0x2660 [ 36.760026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.760561] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.761284] ? __pfx_lock_acquire+0x10/0x10 [ 36.761825] ? __pfx_mmap_region+0x10/0x10 [ 36.762366] ? security_mmap_addr+0x7d/0xa0 [ 36.762937] ? get_unmapped_area+0x1f5/0x3f0 [ 36.763510] do_mmap+0x854/0xf00 [ 36.763956] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.764468] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.765042] ksys_mmap_pgoff+0x3af/0x500 [ 36.765567] do_syscall_64+0x3f/0x90 [ 36.766062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.766719] RIP: 0033:0x7f31b5eabd82 [ 36.767198] 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 [ 36.769367] RSP: 002b:00007ffed5eb7668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.770287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31b5eabd82 [ 36.771166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31b52e5000 [ 36.772027] RBP: 00007f31b52e5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.772923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9dc653f60 [ 36.773797] R13: 00007ffed5eb7680 R14: 00007ffed5eb76b0 R15: 00007ffed5eb7a10 [ 36.774683] [ 36.775004] [ 36.775224] Allocated by task 211: [ 36.775663] kasan_save_stack+0x22/0x50 [ 36.776171] kasan_set_track+0x25/0x30 [ 36.776677] __kasan_slab_alloc+0x59/0x70 [ 36.777211] kmem_cache_alloc+0x16b/0x370 [ 36.777736] vm_area_dup+0x20/0x160 [ 36.778199] __split_vma+0x170/0x950 [ 36.778667] split_vma+0xc6/0x110 [ 36.779122] mprotect_fixup+0x8d2/0xb30 [ 36.779630] do_mprotect_pkey+0x87e/0xd40 [ 36.780157] __x64_sys_mprotect+0x78/0xc0 [ 36.780688] do_syscall_64+0x3f/0x90 [ 36.781169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.781818] [ 36.782036] Freed by task 211: [ 36.782431] kasan_save_stack+0x22/0x50 [ 36.782973] kasan_set_track+0x25/0x30 [ 36.783481] kasan_save_free_info+0x2b/0x50 [ 36.784021] __kasan_slab_free+0x10a/0x190 [ 36.784566] kmem_cache_free+0x10d/0x4d0 [ 36.785077] rcu_core+0x8c8/0x2860 [ 36.785533] __do_softirq+0x1b7/0x7d4 [ 36.786042] [ 36.786265] Last potentially related work creation: [ 36.786865] kasan_save_stack+0x22/0x50 [ 36.787385] __kasan_record_aux_stack+0x8e/0xa0 [ 36.787965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.788617] remove_vma+0x139/0x170 [ 36.789070] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.789638] do_vmi_munmap+0x1f1/0x2b0 [ 36.790130] __vm_munmap+0x138/0x3a0 [ 36.790601] __x64_sys_munmap+0x59/0x80 [ 36.791118] do_syscall_64+0x3f/0x90 [ 36.791666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.792452] [ 36.792715] Second to last potentially related work creation: [ 36.793559] kasan_save_stack+0x22/0x50 [ 36.794181] __kasan_record_aux_stack+0x8e/0xa0 [ 36.794889] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.795692] remove_vma+0x139/0x170 [ 36.796248] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.796941] do_vmi_munmap+0x1f1/0x2b0 [ 36.797541] mmap_region+0x1f9/0x2660 [ 36.798132] do_mmap+0x854/0xf00 [ 36.798666] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.799280] ksys_mmap_pgoff+0x3af/0x500 [ 36.799895] do_syscall_64+0x3f/0x90 [ 36.800479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.801272] [ 36.801537] The buggy address belongs to the object at ffff88800c59e828 [ 36.801537] which belongs to the cache vm_area_struct of size 168 [ 36.803373] The buggy address is located 88 bytes inside of [ 36.803373] freed 168-byte region [ffff88800c59e828, ffff88800c59e8d0) [ 36.805121] [ 36.805387] The buggy address belongs to the physical page: [ 36.806202] page:00000000f46d927d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc59e [ 36.807574] memcg:ffff888014182a01 [ 36.808094] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.808877] page_type: 0xffffffff() [ 36.809410] raw: 0100000000000200 ffff88800879fc80 ffffea0000503f00 dead000000000002 [ 36.810498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014182a01 [ 36.811582] page dumped because: kasan: bad access detected [ 36.812369] [ 36.812630] Memory state around the buggy address: [ 36.813316] ffff88800c59e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.814318] ffff88800c59e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.815347] >ffff88800c59e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.816386] ^ [ 36.816870] ffff88800c59e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.817911] ffff88800c59e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.818908] ================================================================== [ 36.820236] Disabling lock debugging due to kernel taint [ 39.181268] BUG: Bad rss-counter state mm:00000000d1c02561 type:MM_FILEPAGES val:33 [ 39.182512] BUG: Bad rss-counter state mm:00000000d1c02561 type:MM_ANONPAGES val:22 [ 39.495908] BUG: Bad rss-counter state mm:000000003238dcad type:MM_FILEPAGES val:33 [ 39.497017] BUG: Bad rss-counter state mm:000000003238dcad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19151' (ECDSA) to the list of known hosts. 2023/06/19 23:31:49 fuzzer started 2023/06/19 23:31:49 dialing manager at localhost:44161 2023/06/19 23:31:49 checking machine... 2023/06/19 23:31:49 checking revisions... [ 40.188719] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:31:49 testing simple program... [ 40.228221] cgroup: Unknown subsys name 'net' [ 40.263483] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:31:48 Registers: info registers vcpu 0 RAX=ffff88800f1e59b8 RBX=ffff88801820fd78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801820fdb0 RBP=ffff88800f1e5910 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=ffff88801820fd10 R13=ffff88800f1e5910 R14=ffffffff813782a8 R15=ffff8880096b2080 RIP=ffffffff818463cb RFL=00000002 [-------] 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 00007f821ab20900 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=00007ffe4fc90000 CR3=000000001c8ee000 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=6720646572637465733a4d41503d706f 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=ffff888008c58400 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=00007f3b06772c70 CR3=000000000ca26000 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=2039343a31333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000