syzkaller login: [ 31.515397] BUG: Bad rss-counter state mm:00000000e58a5cb5 type:MM_FILEPAGES val:33 [ 31.517020] BUG: Bad rss-counter state mm:00000000e58a5cb5 type:MM_ANONPAGES val:22 [ 31.696245] ================================================================== [ 31.697378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.698513] Read of size 8 at addr ffff8880186efdf0 by task sshd/220 [ 31.699558] [ 31.699812] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.700850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.702044] Call Trace: [ 31.702440] [ 31.702781] dump_stack_lvl+0x91/0xf0 [ 31.703367] print_report+0xcc/0x620 [ 31.703943] ? __virt_addr_valid+0x102/0x340 [ 31.704603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.705260] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.705836] kasan_report+0xbe/0xf0 [ 31.706286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.706876] vma_interval_tree_remove+0xc75/0xec0 [ 31.707444] vma_prepare+0xc54/0x11a0 [ 31.707895] __split_vma+0x5af/0x950 [ 31.708344] ? __pfx___split_vma+0x10/0x10 [ 31.708840] ? find_held_lock+0x2c/0x110 [ 31.709342] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.709881] ? lock_is_held_type+0x9f/0x120 [ 31.710390] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.710957] ? mtree_range_walk+0x632/0x900 [ 31.711483] ? mas_walk+0x5c7/0x7c0 [ 31.711934] do_vmi_munmap+0x1f1/0x2b0 [ 31.712428] mmap_region+0x1f9/0x2660 [ 31.712912] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.713447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.714189] ? __pfx_lock_acquire+0x10/0x10 [ 31.714724] ? __pfx_mmap_region+0x10/0x10 [ 31.715286] ? security_mmap_addr+0x7d/0xa0 [ 31.715836] ? get_unmapped_area+0x1f5/0x3f0 [ 31.716431] do_mmap+0x854/0xf00 [ 31.716898] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.717501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.718179] ksys_mmap_pgoff+0x3af/0x500 [ 31.718792] do_syscall_64+0x3f/0x90 [ 31.719372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.720153] RIP: 0033:0x7f6181f0ad82 [ 31.720629] 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 [ 31.722721] RSP: 002b:00007ffc729aa0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.723625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6181f0ad82 [ 31.724464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6181344000 [ 31.725317] RBP: 00007f6181344000 R08: 0000000000000009 R09: 0000000000001000 [ 31.726150] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654d0502ec0 [ 31.726969] R13: 00007ffc729aa0e0 R14: 00007ffc729aa110 R15: 00007ffc729aa470 [ 31.727808] [ 31.728102] [ 31.728318] Allocated by task 213: [ 31.728742] kasan_save_stack+0x22/0x50 [ 31.729247] kasan_set_track+0x25/0x30 [ 31.729737] __kasan_slab_alloc+0x59/0x70 [ 31.730257] kmem_cache_alloc+0x16b/0x370 [ 31.730785] vm_area_dup+0x20/0x160 [ 31.731240] __split_vma+0x170/0x950 [ 31.731700] split_vma+0xc6/0x110 [ 31.732133] mprotect_fixup+0x8d2/0xb30 [ 31.732605] do_mprotect_pkey+0x87e/0xd40 [ 31.733133] __x64_sys_mprotect+0x78/0xc0 [ 31.733624] do_syscall_64+0x3f/0x90 [ 31.734089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734701] [ 31.734921] Freed by task 213: [ 31.735302] kasan_save_stack+0x22/0x50 [ 31.735782] kasan_set_track+0x25/0x30 [ 31.736262] kasan_save_free_info+0x2b/0x50 [ 31.736783] __kasan_slab_free+0x10a/0x190 [ 31.737328] kmem_cache_free+0x10d/0x4d0 [ 31.737824] rcu_core+0x8c8/0x2860 [ 31.738260] __do_softirq+0x1b7/0x7d4 [ 31.738718] [ 31.738920] Last potentially related work creation: [ 31.739479] kasan_save_stack+0x22/0x50 [ 31.739962] __kasan_record_aux_stack+0x8e/0xa0 [ 31.740543] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.741187] remove_vma+0x139/0x170 [ 31.741614] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.742149] do_vmi_munmap+0x1f1/0x2b0 [ 31.742607] __vm_munmap+0x138/0x3a0 [ 31.743058] __x64_sys_munmap+0x59/0x80 [ 31.743526] do_syscall_64+0x3f/0x90 [ 31.743974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.744591] [ 31.744800] The buggy address belongs to the object at ffff8880186efd98 [ 31.744800] which belongs to the cache vm_area_struct of size 168 [ 31.746225] The buggy address is located 88 bytes inside of [ 31.746225] freed 168-byte region [ffff8880186efd98, ffff8880186efe40) [ 31.747525] [ 31.747732] The buggy address belongs to the physical page: [ 31.748346] page:0000000074d874e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186ef [ 31.749383] memcg:ffff88800ee9d101 [ 31.749784] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.750387] page_type: 0xffffffff() [ 31.750810] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.751711] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9d101 [ 31.752595] page dumped because: kasan: bad access detected [ 31.753268] [ 31.753487] Memory state around the buggy address: [ 31.754071] ffff8880186efc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.754908] ffff8880186efd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.755826] >ffff8880186efd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.756754] ^ [ 31.757739] ffff8880186efe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.758786] ffff8880186efe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.759846] ================================================================== [ 31.761000] Disabling lock debugging due to kernel taint [ 33.689490] BUG: Bad rss-counter state mm:000000001c51be43 type:MM_FILEPAGES val:33 [ 33.690383] BUG: Bad rss-counter state mm:000000001c51be43 type:MM_ANONPAGES val:22 [ 34.148131] BUG: Bad rss-counter state mm:0000000081ed6480 type:MM_FILEPAGES val:33 [ 34.149355] BUG: Bad rss-counter state mm:0000000081ed6480 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51412' (ECDSA) to the list of known hosts. 2023/06/20 18:26:31 fuzzer started 2023/06/20 18:26:31 dialing manager at localhost:36067 2023/06/20 18:26:31 checking machine... 2023/06/20 18:26:31 checking revisions... [ 34.828345] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:26:31 testing simple program... [ 34.875132] cgroup: Unknown subsys name 'net' [ 34.912194] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f720b6e6c30 CR3=000000000f660000 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=0bd0559e1a481ea8eb4c87f84614b512 XMM02=000000000011cf48ec2efd57dc4c00df XMM03=00000000001216b0e0777166051e21be XMM04=0402b5a5a1e8ad1200000000000ae988 XMM05=19e9129bd510f2350000000000131490 XMM06=ac501123c381c3ad00000000001302f8 XMM07=e042d86d42eb936e0000000000121930 XMM08=e0777166051e21be000000000011cfa8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003941e49 RBX=0000000000000003 RCX=0000000000000001 RDX=0000000000000800 RSI=000000000000000e RDI=ffff88801ca0f248 RBP=dffffc0000000000 RSP=ffff88801ca0f180 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000e R13=0000000000000800 R14=ffff88801ca0f230 R15=ffff88800fe13d10 RIP=ffffffff813ad61a 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 00007f20c9ed1900 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=00007f20c9e9b008 CR3=000000000fc32000 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=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