syzkaller login: [ 28.733290] BUG: Bad rss-counter state mm:000000000acddc4b type:MM_FILEPAGES val:33 [ 28.734472] BUG: Bad rss-counter state mm:000000000acddc4b type:MM_ANONPAGES val:22 [ 28.894567] ================================================================== [ 28.895542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.896490] Read of size 8 at addr ffff88800cf26058 by task sshd/220 [ 28.897431] [ 28.897654] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.898528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.899560] Call Trace: [ 28.899885] [ 28.900175] dump_stack_lvl+0x91/0xf0 [ 28.900676] print_report+0xcc/0x620 [ 28.901168] ? __virt_addr_valid+0x102/0x340 [ 28.901725] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902351] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902985] kasan_report+0xbe/0xf0 [ 28.903461] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904094] vma_interval_tree_remove+0xc75/0xec0 [ 28.904710] vma_prepare+0xc54/0x11a0 [ 28.905207] __split_vma+0x5af/0x950 [ 28.905695] ? __pfx___split_vma+0x10/0x10 [ 28.906248] ? find_held_lock+0x2c/0x110 [ 28.906774] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.907366] ? lock_is_held_type+0x9f/0x120 [ 28.907923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.908544] ? mtree_range_walk+0x632/0x900 [ 28.909103] ? mas_walk+0x5c7/0x7c0 [ 28.909584] do_vmi_munmap+0x1f1/0x2b0 [ 28.910091] mmap_region+0x1f9/0x2660 [ 28.910579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.911128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.911848] ? __pfx_lock_acquire+0x10/0x10 [ 28.912394] ? __pfx_mmap_region+0x10/0x10 [ 28.912934] ? security_mmap_addr+0x7d/0xa0 [ 28.913483] ? get_unmapped_area+0x1f5/0x3f0 [ 28.914037] do_mmap+0x854/0xf00 [ 28.914485] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.914986] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.915549] ksys_mmap_pgoff+0x3af/0x500 [ 28.916076] do_syscall_64+0x3f/0x90 [ 28.916567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917232] RIP: 0033:0x7f1035eb6d82 [ 28.917688] 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 [ 28.919874] RSP: 002b:00007ffe9ddf5858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.920802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1035eb6d82 [ 28.921679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10352f0000 [ 28.922532] RBP: 00007f10352f0000 R08: 0000000000000009 R09: 0000000000001000 [ 28.923434] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef54004ec0 [ 28.924296] R13: 00007ffe9ddf5870 R14: 00007ffe9ddf58a0 R15: 00007ffe9ddf5c00 [ 28.925168] [ 28.925467] [ 28.925682] Allocated by task 213: [ 28.926131] kasan_save_stack+0x22/0x50 [ 28.926647] kasan_set_track+0x25/0x30 [ 28.927158] __kasan_slab_alloc+0x59/0x70 [ 28.927689] kmem_cache_alloc+0x16b/0x370 [ 28.928212] vm_area_dup+0x20/0x160 [ 28.928670] __split_vma+0x170/0x950 [ 28.929144] split_vma+0xc6/0x110 [ 28.929599] mprotect_fixup+0x8d2/0xb30 [ 28.930117] do_mprotect_pkey+0x87e/0xd40 [ 28.930647] __x64_sys_mprotect+0x78/0xc0 [ 28.931192] do_syscall_64+0x3f/0x90 [ 28.931677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932324] [ 28.932542] Freed by task 19: [ 28.932934] kasan_save_stack+0x22/0x50 [ 28.933433] kasan_set_track+0x25/0x30 [ 28.933940] kasan_save_free_info+0x2b/0x50 [ 28.934482] __kasan_slab_free+0x10a/0x190 [ 28.935037] kmem_cache_free+0x10d/0x4d0 [ 28.935548] rcu_core+0x8c8/0x2860 [ 28.935992] __do_softirq+0x1b7/0x7d4 [ 28.936484] [ 28.936697] Last potentially related work creation: [ 28.937293] kasan_save_stack+0x22/0x50 [ 28.937803] __kasan_record_aux_stack+0x8e/0xa0 [ 28.938437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.939101] remove_vma+0x139/0x170 [ 28.939554] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.940115] do_vmi_munmap+0x1f1/0x2b0 [ 28.940598] __vm_munmap+0x138/0x3a0 [ 28.941076] __x64_sys_munmap+0x59/0x80 [ 28.941579] do_syscall_64+0x3f/0x90 [ 28.942064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942722] [ 28.942951] The buggy address belongs to the object at ffff88800cf26000 [ 28.942951] which belongs to the cache vm_area_struct of size 168 [ 28.944430] The buggy address is located 88 bytes inside of [ 28.944430] freed 168-byte region [ffff88800cf26000, ffff88800cf260a8) [ 28.945822] [ 28.946043] The buggy address belongs to the physical page: [ 28.946703] page:00000000725a24db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf26 [ 28.947803] memcg:ffff88800c53f701 [ 28.948228] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.948870] page_type: 0xffffffff() [ 28.949327] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.950244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c53f701 [ 28.951173] page dumped because: kasan: bad access detected [ 28.951831] [ 28.952045] Memory state around the buggy address: [ 28.952627] ffff88800cf25f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.953573] ffff88800cf25f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.954536] >ffff88800cf26000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.955504] ^ [ 28.956326] ffff88800cf26080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.957296] ffff88800cf26100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.958257] ================================================================== [ 28.959346] Disabling lock debugging due to kernel taint [ 31.179974] BUG: Bad rss-counter state mm:00000000e26507b5 type:MM_FILEPAGES val:33 [ 31.181149] BUG: Bad rss-counter state mm:00000000e26507b5 type:MM_ANONPAGES val:22 [ 31.621223] BUG: Bad rss-counter state mm:00000000149df1ea type:MM_FILEPAGES val:33 [ 31.622387] BUG: Bad rss-counter state mm:00000000149df1ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49383' (ECDSA) to the list of known hosts. 2023/06/21 07:24:09 fuzzer started 2023/06/21 07:24:09 dialing manager at localhost:36067 2023/06/21 07:24:09 checking machine... 2023/06/21 07:24:09 checking revisions... [ 32.337813] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:24:09 testing simple program... [ 32.376661] cgroup: Unknown subsys name 'net' [ 32.422291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:24:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018d674b8 RCX=0000000000000001 RDX=1ffff110031ace98 RSI=ffff888018d67940 RDI=ffff888018d674c0 RBP=ffff888018d67940 RSP=ffff888018d67410 R8 =0000000000000001 R9 =ffff888018d674f8 R10=0000000000038001 R11=000000000002f794 R12=0000000000000008 R13=ffff888018d67500 R14=ffff888018d67940 R15=ffff888018d674b8 RIP=ffffffff81130445 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 00007fe4b3fff700 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=00007efdbd3320b0 CR3=000000000e8ec000 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=2038303a34323a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a34323a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007efdbd26d366 RCX=0000000000000000 RDX=ffff88800f4f3680 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff88801417f520 R8 =ffffffff864bbb58 R9 =ffff88801417f5e0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801417f668 R13=0000000000000000 R14=ffff88800f4f3680 R15=ffff88801a95c260 RIP=ffffffff814c0400 RFL=00000293 [--S-A-C] 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 00007efdbcd7a900 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=00007ffc3b31f000 CR3=000000001c9bc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000