syzkaller login: [ 30.665403] BUG: Bad rss-counter state mm:0000000025216ea4 type:MM_FILEPAGES val:33 [ 30.667030] BUG: Bad rss-counter state mm:0000000025216ea4 type:MM_ANONPAGES val:22 [ 30.838764] ================================================================== [ 30.839670] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.840540] Read of size 8 at addr ffff8880186b5d08 by task sshd/221 [ 30.841257] [ 30.841462] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.842265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.843314] Call Trace: [ 30.843609] [ 30.843875] dump_stack_lvl+0x91/0xf0 [ 30.844331] print_report+0xcc/0x620 [ 30.844803] ? __virt_addr_valid+0x102/0x340 [ 30.845313] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845879] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846452] kasan_report+0xbe/0xf0 [ 30.846887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847482] vma_interval_tree_remove+0xc75/0xec0 [ 30.848038] vma_prepare+0xc54/0x11a0 [ 30.848483] __split_vma+0x5af/0x950 [ 30.848921] ? __pfx___split_vma+0x10/0x10 [ 30.849409] ? find_held_lock+0x2c/0x110 [ 30.849888] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.850411] ? lock_is_held_type+0x9f/0x120 [ 30.850903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.851479] ? mtree_range_walk+0x632/0x900 [ 30.851987] ? mas_walk+0x5c7/0x7c0 [ 30.852424] do_vmi_munmap+0x1f1/0x2b0 [ 30.852875] mmap_region+0x1f9/0x2660 [ 30.853317] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.853791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.854454] ? __pfx_lock_acquire+0x10/0x10 [ 30.854955] ? __pfx_mmap_region+0x10/0x10 [ 30.855442] ? security_mmap_addr+0x7d/0xa0 [ 30.855939] ? get_unmapped_area+0x1f5/0x3f0 [ 30.856450] do_mmap+0x854/0xf00 [ 30.856852] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.857314] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.857829] ksys_mmap_pgoff+0x3af/0x500 [ 30.858291] do_syscall_64+0x3f/0x90 [ 30.858725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859343] RIP: 0033:0x7f8a5b7c9d82 [ 30.859763] 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 [ 30.861743] RSP: 002b:00007ffedab7d498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.862577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a5b7c9d82 [ 30.863377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a5ac03000 [ 30.864173] RBP: 00007f8a5ac03000 R08: 0000000000000009 R09: 0000000000001000 [ 30.864952] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd7885dec0 [ 30.865726] R13: 00007ffedab7d4b0 R14: 00007ffedab7d4e0 R15: 00007ffedab7d840 [ 30.866515] [ 30.866778] [ 30.866989] Allocated by task 214: [ 30.867387] kasan_save_stack+0x22/0x50 [ 30.867862] kasan_set_track+0x25/0x30 [ 30.868316] __kasan_slab_alloc+0x59/0x70 [ 30.868801] kmem_cache_alloc+0x16b/0x370 [ 30.869266] vm_area_dup+0x20/0x160 [ 30.869679] __split_vma+0x170/0x950 [ 30.870108] split_vma+0xc6/0x110 [ 30.870511] mprotect_fixup+0x8d2/0xb30 [ 30.870974] do_mprotect_pkey+0x87e/0xd40 [ 30.871456] __x64_sys_mprotect+0x78/0xc0 [ 30.871933] do_syscall_64+0x3f/0x90 [ 30.872377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872961] [ 30.873158] Freed by task 214: [ 30.873515] kasan_save_stack+0x22/0x50 [ 30.873975] kasan_set_track+0x25/0x30 [ 30.874424] kasan_save_free_info+0x2b/0x50 [ 30.874908] __kasan_slab_free+0x10a/0x190 [ 30.875419] kmem_cache_free+0x10d/0x4d0 [ 30.875887] rcu_core+0x8c8/0x2860 [ 30.876301] __do_softirq+0x1b7/0x7d4 [ 30.876737] [ 30.876930] Last potentially related work creation: [ 30.877468] kasan_save_stack+0x22/0x50 [ 30.877923] __kasan_record_aux_stack+0x8e/0xa0 [ 30.878454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.879043] remove_vma+0x139/0x170 [ 30.879456] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.879964] do_vmi_munmap+0x1f1/0x2b0 [ 30.880407] __vm_munmap+0x138/0x3a0 [ 30.880828] __x64_sys_munmap+0x59/0x80 [ 30.881285] do_syscall_64+0x3f/0x90 [ 30.881724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882304] [ 30.882498] The buggy address belongs to the object at ffff8880186b5cb0 [ 30.882498] which belongs to the cache vm_area_struct of size 168 [ 30.883859] The buggy address is located 88 bytes inside of [ 30.883859] freed 168-byte region [ffff8880186b5cb0, ffff8880186b5d58) [ 30.885234] [ 30.885431] The buggy address belongs to the physical page: [ 30.886029] page:000000002242351d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186b5 [ 30.887054] memcg:ffff88800ecd8601 [ 30.887444] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.888028] page_type: 0xffffffff() [ 30.888437] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.889271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd8601 [ 30.890115] page dumped because: kasan: bad access detected [ 30.890726] [ 30.890928] Memory state around the buggy address: [ 30.891467] ffff8880186b5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.892253] ffff8880186b5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.893037] >ffff8880186b5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.893801] ^ [ 30.894205] ffff8880186b5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.895005] ffff8880186b5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.895784] ================================================================== [ 30.896645] Disabling lock debugging due to kernel taint [ 32.840378] BUG: Bad rss-counter state mm:00000000dd022e04 type:MM_FILEPAGES val:33 [ 32.841427] BUG: Bad rss-counter state mm:00000000dd022e04 type:MM_ANONPAGES val:22 [ 33.305661] BUG: Bad rss-counter state mm:00000000f2c62ae2 type:MM_FILEPAGES val:33 [ 33.306634] BUG: Bad rss-counter state mm:00000000f2c62ae2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54812' (ECDSA) to the list of known hosts. 2023/06/19 22:19:30 fuzzer started 2023/06/19 22:19:30 dialing manager at localhost:44161 2023/06/19 22:19:30 checking machine... 2023/06/19 22:19:30 checking revisions... [ 34.043280] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:19:30 testing simple program... [ 34.099334] cgroup: Unknown subsys name 'net' [ 34.160456] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:19:30 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11001e12f76 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88800f097b98 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8135b8e0 RFL=00000047 [---Z-PC] 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 00007f79781a5900 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=00007f797875c618 CR3=000000000e298000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f09819f4590 CR3=0000000006a56000 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=540199667d2e72ac30475455207032a8 XMM02=ec2efd57dc4c00df00000000001202c8 XMM03=b49b690c36b5ec720000000000120398 XMM04=bdec2ee8c5cf106400000000000ae988 XMM05=aa5d40b28e4db0620000000000135408 XMM06=c291bd5c70af25b900000000001344a8 XMM07=e042d86d42eb936e0000000000124d58 XMM08=b49b690c36b5ec720000000000120398 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000