syzkaller login: [ 30.396111] BUG: Bad rss-counter state mm:0000000080c83c85 type:MM_FILEPAGES val:33 [ 30.397677] BUG: Bad rss-counter state mm:0000000080c83c85 type:MM_ANONPAGES val:22 [ 30.558131] ================================================================== [ 30.559066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.559995] Read of size 8 at addr ffff8880166b6798 by task sshd/220 [ 30.560759] [ 30.560975] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.561927] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.562912] Call Trace: [ 30.563229] [ 30.563541] dump_stack_lvl+0x91/0xf0 [ 30.564031] print_report+0xcc/0x620 [ 30.564513] ? __virt_addr_valid+0x102/0x340 [ 30.565065] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.565678] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.566286] kasan_report+0xbe/0xf0 [ 30.566768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.567388] vma_interval_tree_remove+0xc75/0xec0 [ 30.568015] vma_prepare+0xc54/0x11a0 [ 30.568509] __split_vma+0x5af/0x950 [ 30.568996] ? __pfx___split_vma+0x10/0x10 [ 30.569542] ? find_held_lock+0x2c/0x110 [ 30.570076] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.570679] ? lock_is_held_type+0x9f/0x120 [ 30.571232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.571853] ? mtree_range_walk+0x632/0x900 [ 30.572430] ? mas_walk+0x5c7/0x7c0 [ 30.572923] do_vmi_munmap+0x1f1/0x2b0 [ 30.573428] mmap_region+0x1f9/0x2660 [ 30.573929] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.574458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.575231] ? __pfx_lock_acquire+0x10/0x10 [ 30.575784] ? __pfx_mmap_region+0x10/0x10 [ 30.576327] ? security_mmap_addr+0x7d/0xa0 [ 30.576885] ? get_unmapped_area+0x1f5/0x3f0 [ 30.577453] do_mmap+0x854/0xf00 [ 30.577913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.578425] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.579016] ksys_mmap_pgoff+0x3af/0x500 [ 30.579546] do_syscall_64+0x3f/0x90 [ 30.580042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580711] RIP: 0033:0x7f02812cdd82 [ 30.581184] 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 [ 30.583416] RSP: 002b:00007ffea952b448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.584353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02812cdd82 [ 30.585234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0280707000 [ 30.586118] RBP: 00007f0280707000 R08: 0000000000000009 R09: 0000000000001000 [ 30.587020] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604a3b5cec0 [ 30.587904] R13: 00007ffea952b460 R14: 00007ffea952b490 R15: 00007ffea952b7f0 [ 30.588808] [ 30.589111] [ 30.589336] Allocated by task 213: [ 30.589787] kasan_save_stack+0x22/0x50 [ 30.590313] kasan_set_track+0x25/0x30 [ 30.590838] __kasan_slab_alloc+0x59/0x70 [ 30.591382] kmem_cache_alloc+0x16b/0x370 [ 30.591928] vm_area_dup+0x20/0x160 [ 30.592406] __split_vma+0x170/0x950 [ 30.592895] split_vma+0xc6/0x110 [ 30.593349] mprotect_fixup+0x8d2/0xb30 [ 30.593871] do_mprotect_pkey+0x87e/0xd40 [ 30.594408] __x64_sys_mprotect+0x78/0xc0 [ 30.594960] do_syscall_64+0x3f/0x90 [ 30.595457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.596124] [ 30.596340] Freed by task 203: [ 30.596743] kasan_save_stack+0x22/0x50 [ 30.597263] kasan_set_track+0x25/0x30 [ 30.597768] kasan_save_free_info+0x2b/0x50 [ 30.598312] __kasan_slab_free+0x10a/0x190 [ 30.598877] kmem_cache_free+0x10d/0x4d0 [ 30.599406] rcu_core+0x8c8/0x2860 [ 30.599866] __do_softirq+0x1b7/0x7d4 [ 30.600370] [ 30.600596] Last potentially related work creation: [ 30.601217] kasan_save_stack+0x22/0x50 [ 30.601745] __kasan_record_aux_stack+0x8e/0xa0 [ 30.602336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.603019] remove_vma+0x139/0x170 [ 30.603496] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.604081] do_vmi_munmap+0x1f1/0x2b0 [ 30.604598] __vm_munmap+0x138/0x3a0 [ 30.605088] __x64_sys_munmap+0x59/0x80 [ 30.605630] do_syscall_64+0x3f/0x90 [ 30.606132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.606820] [ 30.607043] The buggy address belongs to the object at ffff8880166b6740 [ 30.607043] which belongs to the cache vm_area_struct of size 168 [ 30.608585] The buggy address is located 88 bytes inside of [ 30.608585] freed 168-byte region [ffff8880166b6740, ffff8880166b67e8) [ 30.610079] [ 30.610309] The buggy address belongs to the physical page: [ 30.611015] page:0000000067e91621 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166b6 [ 30.612197] memcg:ffff88800de6fd01 [ 30.612659] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.613343] page_type: 0xffffffff() [ 30.613822] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a7c0 dead000000000008 [ 30.614801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de6fd01 [ 30.615779] page dumped because: kasan: bad access detected [ 30.616483] [ 30.616713] Memory state around the buggy address: [ 30.617322] ffff8880166b6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.618222] ffff8880166b6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.619130] >ffff8880166b6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.620044] ^ [ 30.620561] ffff8880166b6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.621470] ffff8880166b6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.622391] ================================================================== [ 30.623422] Disabling lock debugging due to kernel taint [ 32.565125] BUG: Bad rss-counter state mm:000000004cd76f19 type:MM_FILEPAGES val:33 [ 32.566214] BUG: Bad rss-counter state mm:000000004cd76f19 type:MM_ANONPAGES val:22 [ 33.141050] BUG: Bad rss-counter state mm:00000000296dac91 type:MM_FILEPAGES val:33 [ 33.142220] BUG: Bad rss-counter state mm:00000000296dac91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50852' (ECDSA) to the list of known hosts. 2023/06/20 21:45:51 fuzzer started 2023/06/20 21:45:52 dialing manager at localhost:36067 2023/06/20 21:45:52 checking machine... 2023/06/20 21:45:52 checking revisions... [ 33.787828] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:45:52 testing simple program... [ 33.837667] cgroup: Unknown subsys name 'net' [ 33.879339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:45:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=ffffffff864bd701 RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffff88806ce09a50 RBP=ffff88806ce09aa8 RSP=ffff88806ce09a38 R8 =ffffffff864bd7f0 R9 =ffff88806ce09a90 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e6b1a80 RIP=ffffffff8113038e 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 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=00007f6ccd05cb50 CR3=00000000169a8000 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=2031353a35343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35343a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffffffffffff RBX=0000000000019350 RCX=0000000000000039 RDX=0000000000001000 RSI=00000000000000ff RDI=ffffed100326a180 RBP=0000000000000000 RSP=ffff88800f90f990 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed100326a000 R11=0000000000070000 R12=0000000000000003 R13=ffffffff852c61f8 R14=ffffffff852c61e8 R15=ffffea000064d400 RIP=ffffffff84513422 RFL=00000206 [-----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 00007f32f56e1900 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=00007ffd3cc91000 CR3=000000000f41e000 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=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