syzkaller login: [ 35.540106] BUG: Bad rss-counter state mm:00000000f738c0a2 type:MM_FILEPAGES val:33 [ 35.541143] BUG: Bad rss-counter state mm:00000000f738c0a2 type:MM_ANONPAGES val:22 [ 35.707473] ================================================================== [ 35.708399] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.709334] Read of size 8 at addr ffff888017a354e0 by task sshd/219 [ 35.710097] [ 35.710313] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.711293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.712294] Call Trace: [ 35.712611] [ 35.712922] dump_stack_lvl+0x91/0xf0 [ 35.713413] print_report+0xcc/0x620 [ 35.713908] ? __virt_addr_valid+0x102/0x340 [ 35.714467] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.715081] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.715713] kasan_report+0xbe/0xf0 [ 35.716204] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.716836] vma_interval_tree_remove+0xc75/0xec0 [ 35.717442] vma_prepare+0xc54/0x11a0 [ 35.717920] __split_vma+0x5af/0x950 [ 35.718390] ? __pfx___split_vma+0x10/0x10 [ 35.718919] ? find_held_lock+0x2c/0x110 [ 35.719448] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.720017] ? lock_is_held_type+0x9f/0x120 [ 35.720557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.721160] ? mtree_range_walk+0x632/0x900 [ 35.721711] ? mas_walk+0x5c7/0x7c0 [ 35.722186] do_vmi_munmap+0x1f1/0x2b0 [ 35.722683] mmap_region+0x1f9/0x2660 [ 35.723168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.723701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.724414] ? __pfx_lock_acquire+0x10/0x10 [ 35.724949] ? __pfx_mmap_region+0x10/0x10 [ 35.725476] ? security_mmap_addr+0x7d/0xa0 [ 35.726005] ? get_unmapped_area+0x1f5/0x3f0 [ 35.726551] do_mmap+0x854/0xf00 [ 35.726989] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.727490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.728058] ksys_mmap_pgoff+0x3af/0x500 [ 35.728565] do_syscall_64+0x3f/0x90 [ 35.729048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.729691] RIP: 0033:0x7fdb98e5fd82 [ 35.730150] 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 [ 35.732281] RSP: 002b:00007ffe3ec504d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.733182] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb98e5fd82 [ 35.734049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb98299000 [ 35.734919] RBP: 00007fdb98299000 R08: 0000000000000009 R09: 0000000000001000 [ 35.735811] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571e12efec0 [ 35.736658] R13: 00007ffe3ec504f0 R14: 00007ffe3ec50520 R15: 00007ffe3ec50880 [ 35.737520] [ 35.737815] [ 35.738030] Allocated by task 212: [ 35.738459] kasan_save_stack+0x22/0x50 [ 35.738963] kasan_set_track+0x25/0x30 [ 35.739471] __kasan_slab_alloc+0x59/0x70 [ 35.740004] kmem_cache_alloc+0x16b/0x370 [ 35.740526] vm_area_dup+0x20/0x160 [ 35.740979] __split_vma+0x170/0x950 [ 35.741447] split_vma+0xc6/0x110 [ 35.741886] mprotect_fixup+0x8d2/0xb30 [ 35.742388] do_mprotect_pkey+0x87e/0xd40 [ 35.742909] __x64_sys_mprotect+0x78/0xc0 [ 35.743432] do_syscall_64+0x3f/0x90 [ 35.743912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.744586] [ 35.744803] Freed by task 19: [ 35.745188] kasan_save_stack+0x22/0x50 [ 35.745696] kasan_set_track+0x25/0x30 [ 35.746197] kasan_save_free_info+0x2b/0x50 [ 35.746740] __kasan_slab_free+0x10a/0x190 [ 35.747279] kmem_cache_free+0x10d/0x4d0 [ 35.747783] rcu_core+0x8c8/0x2860 [ 35.748222] __do_softirq+0x1b7/0x7d4 [ 35.748710] [ 35.748925] Last potentially related work creation: [ 35.749511] kasan_save_stack+0x22/0x50 [ 35.750023] __kasan_record_aux_stack+0x8e/0xa0 [ 35.750623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.751297] remove_vma+0x139/0x170 [ 35.751788] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.752448] do_vmi_munmap+0x1f1/0x2b0 [ 35.752953] __vm_munmap+0x138/0x3a0 [ 35.753442] __x64_sys_munmap+0x59/0x80 [ 35.753955] do_syscall_64+0x3f/0x90 [ 35.754451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.755121] [ 35.755346] The buggy address belongs to the object at ffff888017a35488 [ 35.755346] which belongs to the cache vm_area_struct of size 168 [ 35.756892] The buggy address is located 88 bytes inside of [ 35.756892] freed 168-byte region [ffff888017a35488, ffff888017a35530) [ 35.758371] [ 35.758598] The buggy address belongs to the physical page: [ 35.759286] page:0000000096b8ff7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17a35 [ 35.760455] memcg:ffff88801a191a01 [ 35.760904] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.761584] page_type: 0xffffffff() [ 35.762062] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.763031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a191a01 [ 35.763982] page dumped because: kasan: bad access detected [ 35.764679] [ 35.764902] Memory state around the buggy address: [ 35.765514] ffff888017a35380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.766415] ffff888017a35400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.767326] >ffff888017a35480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.768243] ^ [ 35.769028] ffff888017a35500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.769925] ffff888017a35580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.770825] ================================================================== [ 35.771829] Disabling lock debugging due to kernel taint [ 37.667893] BUG: Bad rss-counter state mm:00000000d5d54e60 type:MM_FILEPAGES val:33 [ 37.669337] BUG: Bad rss-counter state mm:00000000d5d54e60 type:MM_ANONPAGES val:22 [ 38.136601] BUG: Bad rss-counter state mm:000000004df83a55 type:MM_FILEPAGES val:33 [ 38.138419] BUG: Bad rss-counter state mm:000000004df83a55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12304' (ECDSA) to the list of known hosts. 2023/06/21 00:31:27 fuzzer started 2023/06/21 00:31:27 dialing manager at localhost:36067 2023/06/21 00:31:27 checking machine... 2023/06/21 00:31:27 checking revisions... [ 38.883582] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:31:28 testing simple program... [ 38.937928] cgroup: Unknown subsys name 'net' [ 38.992228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:31:27 Registers: info registers vcpu 0 RAX=ffff8880142f0001 RBX=ffff8880142ef9a0 RCX=0000000000000001 RDX=ffff8880142ef9a8 RSI=ffff8880142ef970 RDI=ffff8880142ef3d0 RBP=ffff8880142e8000 RSP=ffff8880142ef350 R8 =0000000000000001 R9 =ffff8880142ef400 R10=0000000000038001 R11=000000000008affe R12=ffff8880142ef420 R13=ffff8880142ef408 R14=ffff8880142ef970 R15=ffff8880142ef3c0 RIP=ffffffff81131cda RFL=00000202 [-------] 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 00007f34f1be1900 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=00007f34f10287c0 CR3=000000000c5e4000 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=e62b3bdbc245f2ec00000000000ae988 XMM05=fcf05c0c861fa5ae0000000000132b10 XMM06=dfcdbad4f1609c370000000000131908 XMM07=fb795ef6d65770560000000000121d58 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0aa69 RBX=ffffffff86055348 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff86055348 RSP=ffff888016eff2d0 R8 =ffffffff864bbb4e R9 =ffff888016eff3c8 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007efc09738900 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=00007efc09cef618 CR3=000000001416e000 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