syzkaller login: [ 32.281111] BUG: Bad rss-counter state mm:000000008383a6fc type:MM_FILEPAGES val:33 [ 32.282698] BUG: Bad rss-counter state mm:000000008383a6fc type:MM_ANONPAGES val:22 [ 32.414533] ================================================================== [ 32.415525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.416524] Read of size 8 at addr ffff88800ed68968 by task sshd/220 [ 32.417337] [ 32.417631] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.418594] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.419635] Call Trace: [ 32.420000] [ 32.420305] dump_stack_lvl+0x91/0xf0 [ 32.420834] print_report+0xcc/0x620 [ 32.421345] ? __virt_addr_valid+0x102/0x340 [ 32.421940] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.422595] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.423252] kasan_report+0xbe/0xf0 [ 32.423761] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.424426] vma_interval_tree_remove+0xc75/0xec0 [ 32.425068] vma_prepare+0xc54/0x11a0 [ 32.425579] __split_vma+0x5af/0x950 [ 32.426097] ? __pfx___split_vma+0x10/0x10 [ 32.426667] ? find_held_lock+0x2c/0x110 [ 32.427221] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.427822] ? lock_is_held_type+0x9f/0x120 [ 32.428399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.429051] ? mtree_range_walk+0x632/0x900 [ 32.429641] ? mas_walk+0x5c7/0x7c0 [ 32.430180] do_vmi_munmap+0x1f1/0x2b0 [ 32.430716] mmap_region+0x1f9/0x2660 [ 32.431232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.431786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.432550] ? __pfx_lock_acquire+0x10/0x10 [ 32.433119] ? __pfx_mmap_region+0x10/0x10 [ 32.433693] ? security_mmap_addr+0x7d/0xa0 [ 32.434263] ? get_unmapped_area+0x1f5/0x3f0 [ 32.434854] do_mmap+0x854/0xf00 [ 32.435327] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.435859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.436458] ksys_mmap_pgoff+0x3af/0x500 [ 32.437002] do_syscall_64+0x3f/0x90 [ 32.437511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.438208] RIP: 0033:0x7f438abfbd82 [ 32.438700] 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 [ 32.440980] RSP: 002b:00007ffe314333a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.441960] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f438abfbd82 [ 32.442870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f438a035000 [ 32.443776] RBP: 00007f438a035000 R08: 0000000000000009 R09: 0000000000001000 [ 32.444677] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7bdcafec0 [ 32.445585] R13: 00007ffe314333c0 R14: 00007ffe314333f0 R15: 00007ffe31433750 [ 32.446509] [ 32.446822] [ 32.447053] Allocated by task 213: [ 32.447509] kasan_save_stack+0x22/0x50 [ 32.448049] kasan_set_track+0x25/0x30 [ 32.448600] __kasan_slab_alloc+0x59/0x70 [ 32.449168] kmem_cache_alloc+0x16b/0x370 [ 32.449730] vm_area_dup+0x20/0x160 [ 32.450213] __split_vma+0x170/0x950 [ 32.450708] split_vma+0xc6/0x110 [ 32.451178] mprotect_fixup+0x8d2/0xb30 [ 32.451714] do_mprotect_pkey+0x87e/0xd40 [ 32.452270] __x64_sys_mprotect+0x78/0xc0 [ 32.452830] do_syscall_64+0x3f/0x90 [ 32.453342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.454042] [ 32.454270] Freed by task 213: [ 32.454684] kasan_save_stack+0x22/0x50 [ 32.455216] kasan_set_track+0x25/0x30 [ 32.455741] kasan_save_free_info+0x2b/0x50 [ 32.456310] __kasan_slab_free+0x10a/0x190 [ 32.456882] kmem_cache_free+0x10d/0x4d0 [ 32.457416] rcu_core+0x8c8/0x2860 [ 32.457899] __do_softirq+0x1b7/0x7d4 [ 32.458404] [ 32.458633] Last potentially related work creation: [ 32.459258] kasan_save_stack+0x22/0x50 [ 32.459793] __kasan_record_aux_stack+0x8e/0xa0 [ 32.460408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.461095] remove_vma+0x139/0x170 [ 32.461573] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.462174] do_vmi_munmap+0x1f1/0x2b0 [ 32.462688] __vm_munmap+0x138/0x3a0 [ 32.463181] __x64_sys_munmap+0x59/0x80 [ 32.463710] do_syscall_64+0x3f/0x90 [ 32.464213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.464898] [ 32.465125] The buggy address belongs to the object at ffff88800ed68910 [ 32.465125] which belongs to the cache vm_area_struct of size 168 [ 32.466702] The buggy address is located 88 bytes inside of [ 32.466702] freed 168-byte region [ffff88800ed68910, ffff88800ed689b8) [ 32.468192] [ 32.468425] The buggy address belongs to the physical page: [ 32.469126] page:00000000c074acb0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed68 [ 32.470285] memcg:ffff88800d3e8101 [ 32.470736] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.471425] page_type: 0xffffffff() [ 32.471903] raw: 0100000000000200 ffff88800879fc80 ffffea000039ee80 dead000000000008 [ 32.472874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3e8101 [ 32.473851] page dumped because: kasan: bad access detected [ 32.474563] [ 32.474797] Memory state around the buggy address: [ 32.475415] ffff88800ed68800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.476320] ffff88800ed68880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.477226] >ffff88800ed68900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.478143] ^ [ 32.478987] ffff88800ed68980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.479907] ffff88800ed68a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.480818] ================================================================== [ 32.482195] Disabling lock debugging due to kernel taint [ 34.548697] BUG: Bad rss-counter state mm:000000007fb84a61 type:MM_FILEPAGES val:33 [ 34.549910] BUG: Bad rss-counter state mm:000000007fb84a61 type:MM_ANONPAGES val:22 [ 35.031701] BUG: Bad rss-counter state mm:000000008bd9b535 type:MM_FILEPAGES val:33 [ 35.032758] BUG: Bad rss-counter state mm:000000008bd9b535 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62425' (ECDSA) to the list of known hosts. 2023/06/19 22:51:45 fuzzer started 2023/06/19 22:51:45 dialing manager at localhost:44161 2023/06/19 22:51:45 checking machine... 2023/06/19 22:51:45 checking revisions... [ 35.774266] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:51:45 testing simple program... [ 35.822273] cgroup: Unknown subsys name 'net' [ 35.863968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe79699e98 CR3=000000000f66a000 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=2035343a31353a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=ffffffff814c8421 RDX=ffff88800e82d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880146af330 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fa52fe78c64 R13=0000000000000000 R14=ffff88800e82d1c0 R15=ffff88800e3d6be0 RIP=ffffffff814c01fc 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 00007fa52f5bf900 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=00007fb305e45650 CR3=000000000d88a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6bd53370919a48c700000000000ae988 XMM05=4eb51aba726687060000000000135478 XMM06=19e9129bd510f2350000000000134310 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000