syzkaller login: [ 30.649857] BUG: Bad rss-counter state mm:000000005b7ca8ee type:MM_FILEPAGES val:33 [ 30.651113] BUG: Bad rss-counter state mm:000000005b7ca8ee type:MM_ANONPAGES val:22 [ 30.804647] ================================================================== [ 30.805614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.806602] Read of size 8 at addr ffff88800dd72df0 by task sshd/220 [ 30.807389] [ 30.807633] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.808884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.809891] Call Trace: [ 30.810215] [ 30.810498] dump_stack_lvl+0x91/0xf0 [ 30.811013] print_report+0xcc/0x620 [ 30.811505] ? __virt_addr_valid+0x102/0x340 [ 30.812118] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.813392] kasan_report+0xbe/0xf0 [ 30.813886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814519] vma_interval_tree_remove+0xc75/0xec0 [ 30.815146] vma_prepare+0xc54/0x11a0 [ 30.815636] __split_vma+0x5af/0x950 [ 30.816156] ? __pfx___split_vma+0x10/0x10 [ 30.816693] ? find_held_lock+0x2c/0x110 [ 30.817229] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.817801] ? lock_is_held_type+0x9f/0x120 [ 30.818348] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.818980] ? mtree_range_walk+0x632/0x900 [ 30.819528] ? mas_walk+0x5c7/0x7c0 [ 30.820051] do_vmi_munmap+0x1f1/0x2b0 [ 30.820549] mmap_region+0x1f9/0x2660 [ 30.821058] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.821579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.822312] ? __pfx_lock_acquire+0x10/0x10 [ 30.822863] ? __pfx_mmap_region+0x10/0x10 [ 30.823392] ? security_mmap_addr+0x7d/0xa0 [ 30.823975] ? get_unmapped_area+0x1f5/0x3f0 [ 30.824531] do_mmap+0x854/0xf00 [ 30.824993] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.825496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.826075] ksys_mmap_pgoff+0x3af/0x500 [ 30.826584] do_syscall_64+0x3f/0x90 [ 30.827079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827726] RIP: 0033:0x7f8b45213d82 [ 30.828229] 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 [ 30.830392] RSP: 002b:00007ffc7b08fdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.831326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8b45213d82 [ 30.832232] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8b4464d000 [ 30.833124] RBP: 00007f8b4464d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.834013] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0e1270f70 [ 30.834890] R13: 00007ffc7b08fe10 R14: 00007ffc7b08fe40 R15: 00007ffc7b0901a0 [ 30.835761] [ 30.836114] [ 30.836338] Allocated by task 213: [ 30.836788] kasan_save_stack+0x22/0x50 [ 30.837320] kasan_set_track+0x25/0x30 [ 30.837840] __kasan_slab_alloc+0x59/0x70 [ 30.838372] kmem_cache_alloc+0x16b/0x370 [ 30.838903] vm_area_dup+0x20/0x160 [ 30.839370] __split_vma+0x170/0x950 [ 30.839871] split_vma+0xc6/0x110 [ 30.840337] mprotect_fixup+0x8d2/0xb30 [ 30.840855] do_mprotect_pkey+0x87e/0xd40 [ 30.841399] __x64_sys_mprotect+0x78/0xc0 [ 30.841965] do_syscall_64+0x3f/0x90 [ 30.842463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843146] [ 30.843372] Freed by task 213: [ 30.843780] kasan_save_stack+0x22/0x50 [ 30.844344] kasan_set_track+0x25/0x30 [ 30.844888] kasan_save_free_info+0x2b/0x50 [ 30.845446] __kasan_slab_free+0x10a/0x190 [ 30.846020] kmem_cache_free+0x10d/0x4d0 [ 30.846550] rcu_core+0x8c8/0x2860 [ 30.847029] __do_softirq+0x1b7/0x7d4 [ 30.847528] [ 30.847750] Last potentially related work creation: [ 30.848409] kasan_save_stack+0x22/0x50 [ 30.849003] __kasan_record_aux_stack+0x8e/0xa0 [ 30.849726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.850412] remove_vma+0x139/0x170 [ 30.850896] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.851479] do_vmi_munmap+0x1f1/0x2b0 [ 30.852024] __vm_munmap+0x138/0x3a0 [ 30.852523] __x64_sys_munmap+0x59/0x80 [ 30.853055] do_syscall_64+0x3f/0x90 [ 30.853557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854248] [ 30.854471] Second to last potentially related work creation: [ 30.855207] kasan_save_stack+0x22/0x50 [ 30.855733] __kasan_record_aux_stack+0x8e/0xa0 [ 30.856371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.857066] remove_vma+0x139/0x170 [ 30.857540] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.858132] do_vmi_munmap+0x1f1/0x2b0 [ 30.858637] mmap_region+0x1f9/0x2660 [ 30.859150] do_mmap+0x854/0xf00 [ 30.859601] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.860147] ksys_mmap_pgoff+0x3af/0x500 [ 30.860670] do_syscall_64+0x3f/0x90 [ 30.861180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861875] [ 30.862106] The buggy address belongs to the object at ffff88800dd72d98 [ 30.862106] which belongs to the cache vm_area_struct of size 168 [ 30.863646] The buggy address is located 88 bytes inside of [ 30.863646] freed 168-byte region [ffff88800dd72d98, ffff88800dd72e40) [ 30.865209] [ 30.865436] The buggy address belongs to the physical page: [ 30.866134] page:000000003f5454eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd72 [ 30.867289] memcg:ffff88800ee3b401 [ 30.867734] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.868506] page_type: 0xffffffff() [ 30.868994] raw: 0100000000000200 ffff8880087a0c80 ffffea0000375f00 dead000000000009 [ 30.869978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee3b401 [ 30.870949] page dumped because: kasan: bad access detected [ 30.871638] [ 30.871883] Memory state around the buggy address: [ 30.872515] ffff88800dd72c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.873436] ffff88800dd72d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.874356] >ffff88800dd72d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.875255] ^ [ 30.876138] ffff88800dd72e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.877053] ffff88800dd72e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.877957] ================================================================== [ 30.879063] Disabling lock debugging due to kernel taint [ 32.948336] BUG: Bad rss-counter state mm:00000000fce169b7 type:MM_FILEPAGES val:33 [ 32.949257] BUG: Bad rss-counter state mm:00000000fce169b7 type:MM_ANONPAGES val:22 [ 33.508446] BUG: Bad rss-counter state mm:00000000c9a9aaf4 type:MM_FILEPAGES val:33 [ 33.509595] BUG: Bad rss-counter state mm:00000000c9a9aaf4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24274' (ECDSA) to the list of known hosts. 2023/06/21 00:43:14 fuzzer started 2023/06/21 00:43:14 dialing manager at localhost:36067 2023/06/21 00:43:14 checking machine... 2023/06/21 00:43:14 checking revisions... [ 34.122136] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:43:14 testing simple program... [ 34.175794] cgroup: Unknown subsys name 'net' [ 34.239866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:43:14 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000000000a4 RCX=00000000000000a4 RDX=ffffed10017fcc15 RSI=ffff88800bfe6000 RDI=00007fff54dd8b90 RBP=00007fff54dd8b90 RSP=ffff88801c9d7750 R8 =000200140000004c R9 =ffffed10017fcc14 R10=ffff88800bfe60a3 R11=0000000000000000 R12=ffff88800bfe6000 R13=00007fff54dd8c34 R14=0000000000000000 R15=ffff88801c9d7e70 RIP=ffffffff84501833 RFL=00040202 [-------] 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 00007fcb231f1900 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=00007fcb237a8618 CR3=0000000009922000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f15710c5628 CR3=000000001029e000 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=86565075fa497ba2c64eae70a9adffe1 XMM02=000000000011a510ec2efd57dc4c00df XMM03=0000000000121e58ea8586c7f039d6dc XMM04=0c33324cf033cbaf00000000000ae988 XMM05=e997c7daab9038dd0000000000133de0 XMM06=4fda316b135da52b0000000000132e80 XMM07=e042d86d42eb936e00000000001220d8 XMM08=ea8586c7f039d6dc000000000011a570 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000