syzkaller login: [ 67.465848] BUG: Bad rss-counter state mm:000000000799b59d type:MM_FILEPAGES val:33 [ 67.467374] BUG: Bad rss-counter state mm:000000000799b59d type:MM_ANONPAGES val:22 [ 67.628328] ================================================================== [ 67.629372] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.630376] Read of size 8 at addr ffff88800e4bf310 by task sshd/219 [ 67.631366] [ 67.631611] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.632554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.633640] Call Trace: [ 67.633996] [ 67.634309] dump_stack_lvl+0x91/0xf0 [ 67.634840] print_report+0xcc/0x620 [ 67.635369] ? __virt_addr_valid+0x102/0x340 [ 67.635973] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.636667] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.637337] kasan_report+0xbe/0xf0 [ 67.637861] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.638536] vma_interval_tree_remove+0xc75/0xec0 [ 67.639191] vma_prepare+0xc54/0x11a0 [ 67.639709] __split_vma+0x5af/0x950 [ 67.640238] ? __pfx___split_vma+0x10/0x10 [ 67.640809] ? find_held_lock+0x2c/0x110 [ 67.641365] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.641984] ? lock_is_held_type+0x9f/0x120 [ 67.642574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.643285] ? mtree_range_walk+0x632/0x900 [ 67.643897] ? mas_walk+0x5c7/0x7c0 [ 67.644433] do_vmi_munmap+0x1f1/0x2b0 [ 67.644977] mmap_region+0x1f9/0x2660 [ 67.645509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.646081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.646868] ? __pfx_lock_acquire+0x10/0x10 [ 67.647438] ? __pfx_mmap_region+0x10/0x10 [ 67.648044] ? security_mmap_addr+0x7d/0xa0 [ 67.648633] ? get_unmapped_area+0x1f5/0x3f0 [ 67.649245] do_mmap+0x854/0xf00 [ 67.649715] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.650259] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.650878] ksys_mmap_pgoff+0x3af/0x500 [ 67.651425] do_syscall_64+0x3f/0x90 [ 67.651956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.652666] RIP: 0033:0x7fbee17f6d82 [ 67.653178] 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 [ 67.655506] RSP: 002b:00007fffaf866a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.656517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbee17f6d82 [ 67.657435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbee0c30000 [ 67.658370] RBP: 00007fbee0c30000 R08: 0000000000000009 R09: 0000000000001000 [ 67.659289] R10: 0000000000000812 R11: 0000000000000206 R12: 000055853361cf60 [ 67.660235] R13: 00007fffaf866a20 R14: 00007fffaf866a50 R15: 00007fffaf866db0 [ 67.661182] [ 67.661500] [ 67.661736] Allocated by task 212: [ 67.662213] kasan_save_stack+0x22/0x50 [ 67.662757] kasan_set_track+0x25/0x30 [ 67.663303] __kasan_slab_alloc+0x59/0x70 [ 67.663882] kmem_cache_alloc+0x16b/0x370 [ 67.664461] vm_area_dup+0x20/0x160 [ 67.664964] __split_vma+0x170/0x950 [ 67.665464] split_vma+0xc6/0x110 [ 67.665941] mprotect_fixup+0x8d2/0xb30 [ 67.666489] do_mprotect_pkey+0x87e/0xd40 [ 67.667063] __x64_sys_mprotect+0x78/0xc0 [ 67.667630] do_syscall_64+0x3f/0x90 [ 67.668170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.668873] [ 67.669113] Freed by task 212: [ 67.669539] kasan_save_stack+0x22/0x50 [ 67.670096] kasan_set_track+0x25/0x30 [ 67.670641] kasan_save_free_info+0x2b/0x50 [ 67.671233] __kasan_slab_free+0x10a/0x190 [ 67.671825] kmem_cache_free+0x10d/0x4d0 [ 67.672441] rcu_core+0x8c8/0x2860 [ 67.672928] __do_softirq+0x1b7/0x7d4 [ 67.673460] [ 67.673696] Last potentially related work creation: [ 67.674346] kasan_save_stack+0x22/0x50 [ 67.674899] __kasan_record_aux_stack+0x8e/0xa0 [ 67.675522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.676252] remove_vma+0x139/0x170 [ 67.676746] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.677342] do_vmi_munmap+0x1f1/0x2b0 [ 67.677870] __vm_munmap+0x138/0x3a0 [ 67.678381] __x64_sys_munmap+0x59/0x80 [ 67.678916] do_syscall_64+0x3f/0x90 [ 67.679439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.680162] [ 67.680396] The buggy address belongs to the object at ffff88800e4bf2b8 [ 67.680396] which belongs to the cache vm_area_struct of size 168 [ 67.682020] The buggy address is located 88 bytes inside of [ 67.682020] freed 168-byte region [ffff88800e4bf2b8, ffff88800e4bf360) [ 67.683560] [ 67.683796] The buggy address belongs to the physical page: [ 67.684531] page:000000007e680cdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4bf [ 67.685702] memcg:ffff88800deb5701 [ 67.686165] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.686865] page_type: 0xffffffff() [ 67.687351] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2400 dead000000000004 [ 67.688375] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deb5701 [ 67.689359] page dumped because: kasan: bad access detected [ 67.690094] [ 67.690334] Memory state around the buggy address: [ 67.690977] ffff88800e4bf200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 67.691911] ffff88800e4bf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 67.692880] >ffff88800e4bf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 67.693809] ^ [ 67.694320] ffff88800e4bf380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.695263] ffff88800e4bf400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 67.696218] ================================================================== [ 67.697417] Disabling lock debugging due to kernel taint [ 69.922923] BUG: Bad rss-counter state mm:000000009c3ce86d type:MM_FILEPAGES val:33 [ 69.923704] BUG: Bad rss-counter state mm:000000009c3ce86d type:MM_ANONPAGES val:22 [ 70.430764] BUG: Bad rss-counter state mm:0000000020d51b43 type:MM_FILEPAGES val:33 [ 70.431848] BUG: Bad rss-counter state mm:0000000020d51b43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31870' (ECDSA) to the list of known hosts. 2023/06/20 05:21:06 fuzzer started 2023/06/20 05:21:07 dialing manager at localhost:44161 2023/06/20 05:21:07 checking machine... 2023/06/20 05:21:07 checking revisions... [ 71.123985] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:21:07 testing simple program... [ 71.178633] cgroup: Unknown subsys name 'net' [ 71.237106] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:20:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff849384a0 RCX=0000000000000000 RDX=1ffff110019e0a63 RSI=ffffffff8186bfe8 RDI=0000000000000005 RBP=ffff88800cf05180 RSP=ffff88801b73fdd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800cf05318 R13=ffff88800cf051d0 R14=ffff8880162d3438 R15=ffff88800cf05300 RIP=ffffffff814c07e4 RFL=00000246 [---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 00007fb85919a900 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=00007fb8597520b0 CR3=00000000095c2000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=00007fb7597b39f0 CR3=000000000da48000 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=2036303a31323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a31323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000