syzkaller login: [ 34.204516] BUG: Bad rss-counter state mm:00000000fda32d8d type:MM_FILEPAGES val:33 [ 34.205769] BUG: Bad rss-counter state mm:00000000fda32d8d type:MM_ANONPAGES val:22 [ 34.352840] ================================================================== [ 34.353738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.354674] Read of size 8 at addr ffff888017eaf6b0 by task sshd/220 [ 34.355439] [ 34.355730] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.356581] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.357550] Call Trace: [ 34.357880] [ 34.358166] dump_stack_lvl+0x91/0xf0 [ 34.358685] print_report+0xcc/0x620 [ 34.359167] ? __virt_addr_valid+0x102/0x340 [ 34.359712] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.360328] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.360943] kasan_report+0xbe/0xf0 [ 34.361417] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.362034] vma_interval_tree_remove+0xc75/0xec0 [ 34.362636] vma_prepare+0xc54/0x11a0 [ 34.363112] __split_vma+0x5af/0x950 [ 34.363589] ? __pfx___split_vma+0x10/0x10 [ 34.364113] ? find_held_lock+0x2c/0x110 [ 34.364630] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.365194] ? lock_is_held_type+0x9f/0x120 [ 34.365733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.366336] ? mtree_range_walk+0x632/0x900 [ 34.366893] ? mas_walk+0x5c7/0x7c0 [ 34.367364] do_vmi_munmap+0x1f1/0x2b0 [ 34.367851] mmap_region+0x1f9/0x2660 [ 34.368337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.368843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.369550] ? __pfx_lock_acquire+0x10/0x10 [ 34.370076] ? __pfx_mmap_region+0x10/0x10 [ 34.370621] ? security_mmap_addr+0x7d/0xa0 [ 34.371150] ? get_unmapped_area+0x1f5/0x3f0 [ 34.371696] do_mmap+0x854/0xf00 [ 34.372130] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.372626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.373188] ksys_mmap_pgoff+0x3af/0x500 [ 34.373698] do_syscall_64+0x3f/0x90 [ 34.374176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.374825] RIP: 0033:0x7ffb1baa2d82 [ 34.375278] 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 [ 34.377416] RSP: 002b:00007ffd56e3b1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.378318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb1baa2d82 [ 34.379176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb1aedc000 [ 34.380023] RBP: 00007ffb1aedc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.380859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c790c80ec0 [ 34.381703] R13: 00007ffd56e3b200 R14: 00007ffd56e3b230 R15: 00007ffd56e3b590 [ 34.382559] [ 34.382860] [ 34.383073] Allocated by task 213: [ 34.383506] kasan_save_stack+0x22/0x50 [ 34.384007] kasan_set_track+0x25/0x30 [ 34.384497] __kasan_slab_alloc+0x59/0x70 [ 34.385024] kmem_cache_alloc+0x16b/0x370 [ 34.385537] vm_area_dup+0x20/0x160 [ 34.385996] __split_vma+0x170/0x950 [ 34.386462] split_vma+0xc6/0x110 [ 34.386912] mprotect_fixup+0x8d2/0xb30 [ 34.387419] do_mprotect_pkey+0x87e/0xd40 [ 34.387936] __x64_sys_mprotect+0x78/0xc0 [ 34.388454] do_syscall_64+0x3f/0x90 [ 34.388927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.389565] [ 34.389779] Freed by task 213: [ 34.390169] kasan_save_stack+0x22/0x50 [ 34.390693] kasan_set_track+0x25/0x30 [ 34.391190] kasan_save_free_info+0x2b/0x50 [ 34.391730] __kasan_slab_free+0x10a/0x190 [ 34.392259] kmem_cache_free+0x10d/0x4d0 [ 34.392764] rcu_core+0x8c8/0x2860 [ 34.393205] __do_softirq+0x1b7/0x7d4 [ 34.393677] [ 34.393892] Last potentially related work creation: [ 34.394472] kasan_save_stack+0x22/0x50 [ 34.394986] __kasan_record_aux_stack+0x8e/0xa0 [ 34.395559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.396202] remove_vma+0x139/0x170 [ 34.396652] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.397212] do_vmi_munmap+0x1f1/0x2b0 [ 34.397695] __vm_munmap+0x138/0x3a0 [ 34.398158] __x64_sys_munmap+0x59/0x80 [ 34.398674] do_syscall_64+0x3f/0x90 [ 34.399154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.399797] [ 34.400010] The buggy address belongs to the object at ffff888017eaf658 [ 34.400010] which belongs to the cache vm_area_struct of size 168 [ 34.401478] The buggy address is located 88 bytes inside of [ 34.401478] freed 168-byte region [ffff888017eaf658, ffff888017eaf700) [ 34.402881] [ 34.403101] The buggy address belongs to the physical page: [ 34.403756] page:0000000032fe3567 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17eaf [ 34.404842] memcg:ffff8880198af701 [ 34.405272] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.405908] page_type: 0xffffffff() [ 34.406359] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.407308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198af701 [ 34.408240] page dumped because: kasan: bad access detected [ 34.408901] [ 34.409118] Memory state around the buggy address: [ 34.409715] ffff888017eaf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.410589] ffff888017eaf600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.411447] >ffff888017eaf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.412321] ^ [ 34.412909] ffff888017eaf700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.413760] ffff888017eaf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.414603] ================================================================== [ 34.415604] Disabling lock debugging due to kernel taint [ 36.351404] BUG: Bad rss-counter state mm:00000000620c5ac9 type:MM_FILEPAGES val:33 [ 36.352476] BUG: Bad rss-counter state mm:00000000620c5ac9 type:MM_ANONPAGES val:22 [ 36.751026] BUG: Bad rss-counter state mm:00000000853a903c type:MM_FILEPAGES val:33 [ 36.751813] BUG: Bad rss-counter state mm:00000000853a903c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30575' (ECDSA) to the list of known hosts. 2023/06/20 04:06:51 fuzzer started 2023/06/20 04:06:51 dialing manager at localhost:44161 2023/06/20 04:06:51 checking machine... 2023/06/20 04:06:51 checking revisions... [ 37.473064] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:06:51 testing simple program... [ 37.518626] cgroup: Unknown subsys name 'net' [ 37.563791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b10 RCX=0000000000000005 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806ce09ac0 RBP=ffff888015ae51c0 RSP=ffff88806ce09a20 R8 =0000000000000540 R9 =0000000000000000 R10=ffff88806ce09a78 R11=00000000000b6996 R12=0000000000000000 R13=ffff88806ce09aa0 R14=ffff888015ae51c0 R15=ffff88806ce09a78 RIP=ffffffff8450d449 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 00007f61cf0f5900 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=00007f61ce56bf80 CR3=000000000c762000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=007bd8a2a719c2a900000000000ae988 XMM05=cccb632cf4321ecc0000000000135510 XMM06=19e9129bd510f23500000000001343a8 XMM07=fb795ef6d657705600000000001248b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83653c21 RDX=ffff888014678000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801cde7800 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000a8100000a81 R12=ffff888015bed248 R13=ffff8880143ed0c0 R14=ffff888015bed579 R15=ffff888015bed600 RIP=ffffffff814c0388 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 00007fa6bfaaf900 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=00007fa6c0066618 CR3=000000000e4d0000 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=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