syzkaller login: [ 38.746569] BUG: Bad rss-counter state mm:000000001d0b21b3 type:MM_FILEPAGES val:33 [ 38.747818] BUG: Bad rss-counter state mm:000000001d0b21b3 type:MM_ANONPAGES val:22 [ 38.901835] ================================================================== [ 38.902901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.904048] Read of size 8 at addr ffff88800dde2798 by task sshd/218 [ 38.904932] [ 38.905155] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.906028] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.907017] Call Trace: [ 38.907344] <TASK> [ 38.907643] dump_stack_lvl+0x91/0xf0 [ 38.908132] print_report+0xcc/0x620 [ 38.908615] ? __virt_addr_valid+0x102/0x340 [ 38.909176] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909787] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.910397] kasan_report+0xbe/0xf0 [ 38.910871] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.911492] vma_interval_tree_remove+0xc75/0xec0 [ 38.912092] vma_prepare+0xc54/0x11a0 [ 38.912576] __split_vma+0x5af/0x950 [ 38.913050] ? __pfx___split_vma+0x10/0x10 [ 38.913580] ? find_held_lock+0x2c/0x110 [ 38.914101] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.914671] ? lock_is_held_type+0x9f/0x120 [ 38.915203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.915831] ? mtree_range_walk+0x632/0x900 [ 38.916382] ? mas_walk+0x5c7/0x7c0 [ 38.916855] do_vmi_munmap+0x1f1/0x2b0 [ 38.917349] mmap_region+0x1f9/0x2660 [ 38.917828] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.918341] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.919049] ? __pfx_lock_acquire+0x10/0x10 [ 38.919618] ? __pfx_mmap_region+0x10/0x10 [ 38.920154] ? security_mmap_addr+0x7d/0xa0 [ 38.920682] ? get_unmapped_area+0x1f5/0x3f0 [ 38.921234] do_mmap+0x854/0xf00 [ 38.921678] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.922168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.922735] ksys_mmap_pgoff+0x3af/0x500 [ 38.923236] do_syscall_64+0x3f/0x90 [ 38.923747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924429] RIP: 0033:0x7ff1a07b2d82 [ 38.924890] 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 [ 38.927069] RSP: 002b:00007ffe6616f908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.928016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1a07b2d82 [ 38.928879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff19fbec000 [ 38.929746] RBP: 00007ff19fbec000 R08: 0000000000000009 R09: 0000000000001000 [ 38.930626] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f148897ec0 [ 38.931484] R13: 00007ffe6616f920 R14: 00007ffe6616f950 R15: 00007ffe6616fcb0 [ 38.932367] </TASK> [ 38.932663] [ 38.932882] Allocated by task 211: [ 38.933435] kasan_save_stack+0x22/0x50 [ 38.934108] kasan_set_track+0x25/0x30 [ 38.934772] __kasan_slab_alloc+0x59/0x70 [ 38.935471] kmem_cache_alloc+0x16b/0x370 [ 38.936192] vm_area_dup+0x20/0x160 [ 38.936791] __split_vma+0x170/0x950 [ 38.937433] split_vma+0xc6/0x110 [ 38.938029] mprotect_fixup+0x8d2/0xb30 [ 38.938728] do_mprotect_pkey+0x87e/0xd40 [ 38.939446] __x64_sys_mprotect+0x78/0xc0 [ 38.940174] do_syscall_64+0x3f/0x90 [ 38.940828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941729] [ 38.942029] Freed by task 211: [ 38.942574] kasan_save_stack+0x22/0x50 [ 38.943276] kasan_set_track+0x25/0x30 [ 38.943980] kasan_save_free_info+0x2b/0x50 [ 38.944722] __kasan_slab_free+0x10a/0x190 [ 38.945466] kmem_cache_free+0x10d/0x4d0 [ 38.946179] rcu_core+0x8c8/0x2860 [ 38.946800] __do_softirq+0x1b7/0x7d4 [ 38.947464] [ 38.947794] Last potentially related work creation: [ 38.948620] kasan_save_stack+0x22/0x50 [ 38.949319] __kasan_record_aux_stack+0x8e/0xa0 [ 38.950101] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.950779] remove_vma+0x139/0x170 [ 38.951349] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.951990] do_vmi_munmap+0x1f1/0x2b0 [ 38.952505] __vm_munmap+0x138/0x3a0 [ 38.953016] __x64_sys_munmap+0x59/0x80 [ 38.953537] do_syscall_64+0x3f/0x90 [ 38.954047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954729] [ 38.954967] The buggy address belongs to the object at ffff88800dde2740 [ 38.954967] which belongs to the cache vm_area_struct of size 168 [ 38.956745] The buggy address is located 88 bytes inside of [ 38.956745] freed 168-byte region [ffff88800dde2740, ffff88800dde27e8) [ 38.958282] [ 38.958513] The buggy address belongs to the physical page: [ 38.959303] page:0000000051739ee0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdde2 [ 38.960820] memcg:ffff88800eaf5c01 [ 38.961417] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962383] page_type: 0xffffffff() [ 38.962992] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395e80 dead000000000003 [ 38.964298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaf5c01 [ 38.965556] page dumped because: kasan: bad access detected [ 38.966484] [ 38.966784] Memory state around the buggy address: [ 38.967610] ffff88800dde2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.968812] ffff88800dde2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.970011] >ffff88800dde2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.971199] ^ [ 38.971908] ffff88800dde2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.973113] ffff88800dde2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.974304] ================================================================== [ 38.975757] Disabling lock debugging due to kernel taint [ 40.976830] BUG: Bad rss-counter state mm:0000000055f7cb42 type:MM_FILEPAGES val:33 [ 40.978006] BUG: Bad rss-counter state mm:0000000055f7cb42 type:MM_ANONPAGES val:22 [ 41.371324] BUG: Bad rss-counter state mm:00000000cbd794e9 type:MM_FILEPAGES val:33 [ 41.372367] BUG: Bad rss-counter state mm:00000000cbd794e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36685' (ECDSA) to the list of known hosts. 2023/06/20 19:34:57 fuzzer started 2023/06/20 19:34:57 dialing manager at localhost:36067 2023/06/20 19:34:57 checking machine... 2023/06/20 19:34:57 checking revisions... [ 42.079289] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:34:57 testing simple program... [ 42.127459] cgroup: Unknown subsys name 'net' [ 42.181336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:34:57 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000287 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffffffff856d84a0 RSP=ffff88801466fd30 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffff88800de0d178 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff84536004 RFL=00000286 [--S--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 00007fb81edb2900 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=00007fd51ba75650 CR3=000000000d7b4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d4266d80a5ba67fd00000000000ae988 XMM05=e696eeb87033f31f0000000000132b10 XMM06=bdf2e299e47b49d50000000000131590 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880192f4ac0 RCX=ffffffff83635aa6 RDX=ffff88800fcf8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880164e7e60 RSP=ffff8880164e7b18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff8880164e7e88 R15=ffff8880164e7ea4 RIP=ffffffff814c0860 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 00007fd51b4c0900 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=00007fd51ba77618 CR3=0000000018cb6000 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