syzkaller login: [ 30.894836] BUG: Bad rss-counter state mm:0000000087261b74 type:MM_FILEPAGES val:33 [ 30.896430] BUG: Bad rss-counter state mm:0000000087261b74 type:MM_ANONPAGES val:22 [ 31.066890] ================================================================== [ 31.067818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.068759] Read of size 8 at addr ffff88800ff5eb38 by task sshd/221 [ 31.069622] [ 31.069839] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.070700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.071707] Call Trace: [ 31.072026] [ 31.072307] dump_stack_lvl+0x91/0xf0 [ 31.072794] print_report+0xcc/0x620 [ 31.073285] ? __virt_addr_valid+0x102/0x340 [ 31.073841] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.074456] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.075069] kasan_report+0xbe/0xf0 [ 31.075554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.076179] vma_interval_tree_remove+0xc75/0xec0 [ 31.076780] vma_prepare+0xc54/0x11a0 [ 31.077259] __split_vma+0x5af/0x950 [ 31.077735] ? __pfx___split_vma+0x10/0x10 [ 31.078273] ? find_held_lock+0x2c/0x110 [ 31.078799] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.079374] ? lock_is_held_type+0x9f/0x120 [ 31.079909] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.080516] ? mtree_range_walk+0x632/0x900 [ 31.081069] ? mas_walk+0x5c7/0x7c0 [ 31.081549] do_vmi_munmap+0x1f1/0x2b0 [ 31.082045] mmap_region+0x1f9/0x2660 [ 31.082527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.083046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.083781] ? __pfx_lock_acquire+0x10/0x10 [ 31.084315] ? __pfx_mmap_region+0x10/0x10 [ 31.084873] ? security_mmap_addr+0x7d/0xa0 [ 31.085414] ? get_unmapped_area+0x1f5/0x3f0 [ 31.085968] do_mmap+0x854/0xf00 [ 31.086408] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.086900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.087474] ksys_mmap_pgoff+0x3af/0x500 [ 31.087986] do_syscall_64+0x3f/0x90 [ 31.088465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.089117] RIP: 0033:0x7fa65c3dcd82 [ 31.089582] 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 [ 31.091763] RSP: 002b:00007ffcd060edd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.092667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa65c3dcd82 [ 31.093507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa65b816000 [ 31.094363] RBP: 00007fa65b816000 R08: 0000000000000009 R09: 0000000000001000 [ 31.095216] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d79b73dec0 [ 31.096071] R13: 00007ffcd060edf0 R14: 00007ffcd060ee20 R15: 00007ffcd060f180 [ 31.096939] [ 31.097229] [ 31.097442] Allocated by task 214: [ 31.097880] kasan_save_stack+0x22/0x50 [ 31.098387] kasan_set_track+0x25/0x30 [ 31.098880] __kasan_slab_alloc+0x59/0x70 [ 31.099432] kmem_cache_alloc+0x16b/0x370 [ 31.099949] vm_area_dup+0x20/0x160 [ 31.100404] __split_vma+0x170/0x950 [ 31.100875] split_vma+0xc6/0x110 [ 31.101321] mprotect_fixup+0x8d2/0xb30 [ 31.101823] do_mprotect_pkey+0x87e/0xd40 [ 31.102340] __x64_sys_mprotect+0x78/0xc0 [ 31.102868] do_syscall_64+0x3f/0x90 [ 31.103356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.104006] [ 31.104225] Freed by task 13: [ 31.104608] kasan_save_stack+0x22/0x50 [ 31.105114] kasan_set_track+0x25/0x30 [ 31.105612] kasan_save_free_info+0x2b/0x50 [ 31.106147] __kasan_slab_free+0x10a/0x190 [ 31.106682] kmem_cache_free+0x10d/0x4d0 [ 31.107191] rcu_core+0x8c8/0x2860 [ 31.107638] __do_softirq+0x1b7/0x7d4 [ 31.108120] [ 31.108339] Last potentially related work creation: [ 31.108923] kasan_save_stack+0x22/0x50 [ 31.109432] __kasan_record_aux_stack+0x8e/0xa0 [ 31.110005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.110645] remove_vma+0x139/0x170 [ 31.111101] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.111681] do_vmi_munmap+0x1f1/0x2b0 [ 31.112167] __vm_munmap+0x138/0x3a0 [ 31.112639] __x64_sys_munmap+0x59/0x80 [ 31.113134] do_syscall_64+0x3f/0x90 [ 31.113602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.114238] [ 31.114456] Second to last potentially related work creation: [ 31.115144] kasan_save_stack+0x22/0x50 [ 31.115657] __kasan_record_aux_stack+0x8e/0xa0 [ 31.116232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.116877] remove_vma+0x139/0x170 [ 31.117337] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.117896] do_vmi_munmap+0x1f1/0x2b0 [ 31.118390] mmap_region+0x1f9/0x2660 [ 31.118866] do_mmap+0x854/0xf00 [ 31.119313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.119802] ksys_mmap_pgoff+0x3af/0x500 [ 31.120307] do_syscall_64+0x3f/0x90 [ 31.120791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121439] [ 31.121652] The buggy address belongs to the object at ffff88800ff5eae0 [ 31.121652] which belongs to the cache vm_area_struct of size 168 [ 31.123113] The buggy address is located 88 bytes inside of [ 31.123113] freed 168-byte region [ffff88800ff5eae0, ffff88800ff5eb88) [ 31.124522] [ 31.124737] The buggy address belongs to the physical page: [ 31.125399] page:0000000076476a8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff5e [ 31.126488] memcg:ffff888013451f01 [ 31.126915] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.127621] page_type: 0xffffffff() [ 31.128074] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bc080 dead000000000007 [ 31.129001] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013451f01 [ 31.129904] page dumped because: kasan: bad access detected [ 31.130556] [ 31.130775] Memory state around the buggy address: [ 31.131376] ffff88800ff5ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.132231] ffff88800ff5ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.133086] >ffff88800ff5eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.133939] ^ [ 31.134548] ffff88800ff5eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.135414] ffff88800ff5ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.136261] ================================================================== [ 31.137251] Disabling lock debugging due to kernel taint [ 32.839133] BUG: Bad rss-counter state mm:000000006e1bde70 type:MM_FILEPAGES val:33 [ 32.839804] BUG: Bad rss-counter state mm:000000006e1bde70 type:MM_ANONPAGES val:22 [ 33.305513] BUG: Bad rss-counter state mm:00000000462c71af type:MM_FILEPAGES val:33 [ 33.306702] BUG: Bad rss-counter state mm:00000000462c71af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63865' (ECDSA) to the list of known hosts. 2023/06/20 18:25:41 fuzzer started 2023/06/20 18:25:42 dialing manager at localhost:36067 2023/06/20 18:25:42 checking machine... 2023/06/20 18:25:42 checking revisions... [ 33.962754] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:25:42 testing simple program... [ 34.006947] cgroup: Unknown subsys name 'net' [ 34.058715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000002f RDI=ffffffff8450cc5a RBP=ffff88800ee87f58 RSP=ffff88800ee87f18 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000002f R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff815344c5 RFL=00000046 [---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 00007f8d4c2ce900 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=00007f8d4c885618 CR3=000000000e716000 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=563412feff00545000000000000080fe 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=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007febcb5ce000 CR3=000000000c86e000 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=2031343a35323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a35323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000