syzkaller login: [ 33.830612] BUG: Bad rss-counter state mm:0000000022c1de23 type:MM_FILEPAGES val:33 [ 33.831627] BUG: Bad rss-counter state mm:0000000022c1de23 type:MM_ANONPAGES val:22 [ 33.871585] ================================================================== [ 33.872726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.873989] Read of size 8 at addr ffff888016625798 by task sshd/220 [ 33.874907] [ 33.875168] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.876178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.877324] Call Trace: [ 33.877704] [ 33.878040] dump_stack_lvl+0x91/0xf0 [ 33.878628] print_report+0xcc/0x620 [ 33.879200] ? __virt_addr_valid+0x102/0x340 [ 33.879851] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.880586] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.881334] kasan_report+0xbe/0xf0 [ 33.881808] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.882445] vma_interval_tree_remove+0xc75/0xec0 [ 33.883051] vma_prepare+0xc54/0x11a0 [ 33.883533] __split_vma+0x5af/0x950 [ 33.884008] ? __pfx___split_vma+0x10/0x10 [ 33.884529] ? find_held_lock+0x2c/0x110 [ 33.885055] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.885617] ? lock_is_held_type+0x9f/0x120 [ 33.886160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.886767] ? mtree_range_walk+0x632/0x900 [ 33.887317] ? mas_walk+0x5c7/0x7c0 [ 33.887794] do_vmi_munmap+0x1f1/0x2b0 [ 33.888285] mmap_region+0x1f9/0x2660 [ 33.888776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.889280] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.889985] ? __pfx_lock_acquire+0x10/0x10 [ 33.890524] ? __pfx_mmap_region+0x10/0x10 [ 33.891053] ? security_mmap_addr+0x7d/0xa0 [ 33.891577] ? get_unmapped_area+0x1f5/0x3f0 [ 33.892124] do_mmap+0x854/0xf00 [ 33.892561] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.893047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.893602] ksys_mmap_pgoff+0x3af/0x500 [ 33.894102] do_syscall_64+0x3f/0x90 [ 33.894583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.895221] RIP: 0033:0x7efee35f7d82 [ 33.895680] 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 [ 33.897769] RSP: 002b:00007ffccfe4b778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.898682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efee35f7d82 [ 33.899533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efee2a31000 [ 33.900364] RBP: 00007efee2a31000 R08: 0000000000000009 R09: 0000000000001000 [ 33.901199] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9a9c03f70 [ 33.902027] R13: 00007ffccfe4b790 R14: 00007ffccfe4b7c0 R15: 00007ffccfe4bb20 [ 33.902892] [ 33.903178] [ 33.903389] Allocated by task 213: [ 33.903816] kasan_save_stack+0x22/0x50 [ 33.904317] kasan_set_track+0x25/0x30 [ 33.904801] __kasan_slab_alloc+0x59/0x70 [ 33.905318] kmem_cache_alloc+0x16b/0x370 [ 33.905828] vm_area_dup+0x20/0x160 [ 33.906285] __split_vma+0x170/0x950 [ 33.906746] split_vma+0xc6/0x110 [ 33.907182] mprotect_fixup+0x8d2/0xb30 [ 33.907675] do_mprotect_pkey+0x87e/0xd40 [ 33.908191] __x64_sys_mprotect+0x78/0xc0 [ 33.908702] do_syscall_64+0x3f/0x90 [ 33.909168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.909806] [ 33.910018] Freed by task 213: [ 33.910418] kasan_save_stack+0x22/0x50 [ 33.910919] kasan_set_track+0x25/0x30 [ 33.911406] kasan_save_free_info+0x2b/0x50 [ 33.911928] __kasan_slab_free+0x10a/0x190 [ 33.912457] kmem_cache_free+0x10d/0x4d0 [ 33.912963] rcu_core+0x8c8/0x2860 [ 33.913405] __do_softirq+0x1b7/0x7d4 [ 33.913874] [ 33.914086] Last potentially related work creation: [ 33.914675] kasan_save_stack+0x22/0x50 [ 33.915168] __kasan_record_aux_stack+0x8e/0xa0 [ 33.915742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.916377] remove_vma+0x139/0x170 [ 33.916828] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.917378] do_vmi_munmap+0x1f1/0x2b0 [ 33.917854] __vm_munmap+0x138/0x3a0 [ 33.918322] __x64_sys_munmap+0x59/0x80 [ 33.918818] do_syscall_64+0x3f/0x90 [ 33.919284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.919914] [ 33.920125] The buggy address belongs to the object at ffff888016625740 [ 33.920125] which belongs to the cache vm_area_struct of size 168 [ 33.921587] The buggy address is located 88 bytes inside of [ 33.921587] freed 168-byte region [ffff888016625740, ffff8880166257e8) [ 33.922979] [ 33.923191] The buggy address belongs to the physical page: [ 33.923838] page:0000000079908429 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16625 [ 33.924912] memcg:ffff88800e4ea301 [ 33.925342] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.925975] page_type: 0xffffffff() [ 33.926433] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.927344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4ea301 [ 33.928234] page dumped because: kasan: bad access detected [ 33.928886] [ 33.929096] Memory state around the buggy address: [ 33.929666] ffff888016625680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.930523] ffff888016625700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.931380] >ffff888016625780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.932216] ^ [ 33.932700] ffff888016625800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.933543] ffff888016625880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.934397] ================================================================== [ 33.935673] Disabling lock debugging due to kernel taint [ 35.986198] BUG: Bad rss-counter state mm:00000000fbf31ac7 type:MM_FILEPAGES val:33 [ 35.987063] BUG: Bad rss-counter state mm:00000000fbf31ac7 type:MM_ANONPAGES val:22 [ 36.473595] BUG: Bad rss-counter state mm:00000000b384ee10 type:MM_FILEPAGES val:33 [ 36.474790] BUG: Bad rss-counter state mm:00000000b384ee10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38157' (ECDSA) to the list of known hosts. 2023/06/20 00:42:12 fuzzer started 2023/06/20 00:42:12 dialing manager at localhost:44161 2023/06/20 00:42:12 checking machine... 2023/06/20 00:42:12 checking revisions... [ 37.170607] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:42:12 testing simple program... [ 37.213522] cgroup: Unknown subsys name 'net' [ 37.266247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:09 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=0000000000000001 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=00007ffe32e66258 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=00007f7806b48510000055b51c87c790 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=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=00000000158c5520 RSP=ffff8880146d7ca8 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000000 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=0000000000000000 R15=ffffffff85d3ce80 RIP=ffffffff8114325d 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 00007fcbafffb900 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=00007f494ea4a650 CR3=0000000009a24000 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=85c1049af62e122f00000000000ae988 XMM05=21860f5997875e620000000000134838 XMM06=19e9129bd510f23500000000001336d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000