syzkaller login: [ 33.366694] BUG: Bad rss-counter state mm:000000003d99cf5d type:MM_FILEPAGES val:33 [ 33.367975] BUG: Bad rss-counter state mm:000000003d99cf5d type:MM_ANONPAGES val:22 [ 33.523289] ================================================================== [ 33.524367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.525481] Read of size 8 at addr ffff88800f098a50 by task sshd/219 [ 33.526530] [ 33.526799] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.527835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.528962] Call Trace: [ 33.529283] [ 33.529568] dump_stack_lvl+0x91/0xf0 [ 33.530057] print_report+0xcc/0x620 [ 33.530543] ? __virt_addr_valid+0x102/0x340 [ 33.531114] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.531733] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.532353] kasan_report+0xbe/0xf0 [ 33.532834] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.533457] vma_interval_tree_remove+0xc75/0xec0 [ 33.534067] vma_prepare+0xc54/0x11a0 [ 33.534548] __split_vma+0x5af/0x950 [ 33.535033] ? __pfx___split_vma+0x10/0x10 [ 33.535570] ? find_held_lock+0x2c/0x110 [ 33.536100] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.536672] ? lock_is_held_type+0x9f/0x120 [ 33.537215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.537827] ? mtree_range_walk+0x632/0x900 [ 33.538384] ? mas_walk+0x5c7/0x7c0 [ 33.538886] do_vmi_munmap+0x1f1/0x2b0 [ 33.539381] mmap_region+0x1f9/0x2660 [ 33.539871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.540385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.541104] ? __pfx_lock_acquire+0x10/0x10 [ 33.541640] ? __pfx_mmap_region+0x10/0x10 [ 33.542175] ? security_mmap_addr+0x7d/0xa0 [ 33.542708] ? get_unmapped_area+0x1f5/0x3f0 [ 33.543283] do_mmap+0x854/0xf00 [ 33.543733] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.544229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.544797] ksys_mmap_pgoff+0x3af/0x500 [ 33.545306] do_syscall_64+0x3f/0x90 [ 33.545784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.546430] RIP: 0033:0x7fdd40685d82 [ 33.546920] 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 [ 33.549048] RSP: 002b:00007ffccfdd8708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.549953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd40685d82 [ 33.550813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd3fabf000 [ 33.551662] RBP: 00007fdd3fabf000 R08: 0000000000000009 R09: 0000000000001000 [ 33.552502] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2d0ec9f70 [ 33.553346] R13: 00007ffccfdd8720 R14: 00007ffccfdd8750 R15: 00007ffccfdd8ab0 [ 33.554201] [ 33.554492] [ 33.554709] Allocated by task 212: [ 33.555168] kasan_save_stack+0x22/0x50 [ 33.555678] kasan_set_track+0x25/0x30 [ 33.556168] __kasan_slab_alloc+0x59/0x70 [ 33.556690] kmem_cache_alloc+0x16b/0x370 [ 33.557205] vm_area_dup+0x20/0x160 [ 33.557668] __split_vma+0x170/0x950 [ 33.558134] split_vma+0xc6/0x110 [ 33.558571] mprotect_fixup+0x8d2/0xb30 [ 33.559081] do_mprotect_pkey+0x87e/0xd40 [ 33.559605] __x64_sys_mprotect+0x78/0xc0 [ 33.560128] do_syscall_64+0x3f/0x90 [ 33.560610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.561250] [ 33.561464] Freed by task 212: [ 33.561871] kasan_save_stack+0x22/0x50 [ 33.562384] kasan_set_track+0x25/0x30 [ 33.562888] kasan_save_free_info+0x2b/0x50 [ 33.563436] __kasan_slab_free+0x10a/0x190 [ 33.563976] kmem_cache_free+0x10d/0x4d0 [ 33.564483] rcu_core+0x8c8/0x2860 [ 33.564928] __do_softirq+0x1b7/0x7d4 [ 33.565416] [ 33.565635] Last potentially related work creation: [ 33.566218] kasan_save_stack+0x22/0x50 [ 33.566745] __kasan_record_aux_stack+0x8e/0xa0 [ 33.567409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.568065] remove_vma+0x139/0x170 [ 33.568513] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.569071] do_vmi_munmap+0x1f1/0x2b0 [ 33.569559] __vm_munmap+0x138/0x3a0 [ 33.570024] __x64_sys_munmap+0x59/0x80 [ 33.570520] do_syscall_64+0x3f/0x90 [ 33.571009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.571642] [ 33.571863] The buggy address belongs to the object at ffff88800f0989f8 [ 33.571863] which belongs to the cache vm_area_struct of size 168 [ 33.573322] The buggy address is located 88 bytes inside of [ 33.573322] freed 168-byte region [ffff88800f0989f8, ffff88800f098aa0) [ 33.574710] [ 33.574936] The buggy address belongs to the physical page: [ 33.575590] page:000000000ae6f562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf098 [ 33.576726] memcg:ffff88800ef44201 [ 33.577171] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.577894] page_type: 0xffffffff() [ 33.578359] raw: 0100000000000200 ffff88800879fc80 ffffea000051df40 dead000000000003 [ 33.579327] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef44201 [ 33.580262] page dumped because: kasan: bad access detected [ 33.580947] [ 33.581173] Memory state around the buggy address: [ 33.581771] ffff88800f098900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.582658] ffff88800f098980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.583553] >ffff88800f098a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.584431] ^ [ 33.585154] ffff88800f098a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.586035] ffff88800f098b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.586926] ================================================================== [ 33.587887] Disabling lock debugging due to kernel taint [ 35.780744] BUG: Bad rss-counter state mm:0000000014ca1a0b type:MM_FILEPAGES val:33 [ 35.781814] BUG: Bad rss-counter state mm:0000000014ca1a0b type:MM_ANONPAGES val:22 [ 36.223810] BUG: Bad rss-counter state mm:00000000e07b8633 type:MM_FILEPAGES val:33 [ 36.224841] BUG: Bad rss-counter state mm:00000000e07b8633 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24368' (ECDSA) to the list of known hosts. 2023/06/20 08:28:54 fuzzer started 2023/06/20 08:28:54 dialing manager at localhost:44161 2023/06/20 08:28:54 checking machine... 2023/06/20 08:28:54 checking revisions... [ 37.038174] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:28:54 testing simple program... [ 37.090601] cgroup: Unknown subsys name 'net' [ 37.132982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:28:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=ffffffff814c8421 RDX=ffff888016d9d1c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f89bec96699 R13=0000000000000000 R14=ffff888016d9d1c0 R15=ffff88800c53fec0 RIP=ffffffff814c01f2 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 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=00007f89beba3328 CR3=000000000cbd0000 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=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=00007f467e4e1760 CR3=000000000cb3c000 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=00000000000000000000000000000000 XMM01=e1180781c4e4d5bfb644c2784dba5198 XMM02=000000000011da00eff9b2d0a8fce9cb XMM03=000000000011dad02c67c8bc2e329bc3 XMM04=4a7fe960e453b26d00000000000ae988 XMM05=dfcdbad4f1609c370000000000133cf0 XMM06=fa301952b61c076e0000000000132ec8 XMM07=e042d86d42eb936e00000000001246e8 XMM08=aa014f5325781e4a000000000011dad0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000