syzkaller login: [ 30.717083] BUG: Bad rss-counter state mm:000000008825f71b type:MM_FILEPAGES val:33 [ 30.718129] BUG: Bad rss-counter state mm:000000008825f71b type:MM_ANONPAGES val:22 [ 30.890004] ================================================================== [ 30.890934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.891871] Read of size 8 at addr ffff88801a1e4058 by task sshd/220 [ 30.892663] [ 30.892878] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.893780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.894758] Call Trace: [ 30.895079] [ 30.895369] dump_stack_lvl+0x91/0xf0 [ 30.895867] print_report+0xcc/0x620 [ 30.896390] ? __virt_addr_valid+0x102/0x340 [ 30.896949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.897573] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.898193] kasan_report+0xbe/0xf0 [ 30.898676] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.899304] vma_interval_tree_remove+0xc75/0xec0 [ 30.899911] vma_prepare+0xc54/0x11a0 [ 30.900401] __split_vma+0x5af/0x950 [ 30.900874] ? __pfx___split_vma+0x10/0x10 [ 30.901411] ? find_held_lock+0x2c/0x110 [ 30.901934] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.902505] ? lock_is_held_type+0x9f/0x120 [ 30.903044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.903672] ? mtree_range_walk+0x632/0x900 [ 30.904232] ? mas_walk+0x5c7/0x7c0 [ 30.904728] do_vmi_munmap+0x1f1/0x2b0 [ 30.905229] mmap_region+0x1f9/0x2660 [ 30.905716] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.906251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.906976] ? __pfx_lock_acquire+0x10/0x10 [ 30.907524] ? __pfx_mmap_region+0x10/0x10 [ 30.908064] ? security_mmap_addr+0x7d/0xa0 [ 30.908631] ? get_unmapped_area+0x1f5/0x3f0 [ 30.909200] do_mmap+0x854/0xf00 [ 30.909641] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.910141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.910720] ksys_mmap_pgoff+0x3af/0x500 [ 30.911226] do_syscall_64+0x3f/0x90 [ 30.911717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912383] RIP: 0033:0x7feb7e497d82 [ 30.912847] 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 [ 30.915137] RSP: 002b:00007ffc883d7ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.916380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb7e497d82 [ 30.917539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb7d8d1000 [ 30.918707] RBP: 00007feb7d8d1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.919877] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627c997cb20 [ 30.921048] R13: 00007ffc883d8010 R14: 00007ffc883d8040 R15: 00007ffc883d83a0 [ 30.922225] [ 30.922630] [ 30.922927] Allocated by task 213: [ 30.923516] kasan_save_stack+0x22/0x50 [ 30.924212] kasan_set_track+0x25/0x30 [ 30.924908] __kasan_slab_alloc+0x59/0x70 [ 30.925627] kmem_cache_alloc+0x16b/0x370 [ 30.926332] vm_area_dup+0x20/0x160 [ 30.926954] __split_vma+0x170/0x950 [ 30.927593] split_vma+0xc6/0x110 [ 30.928202] mprotect_fixup+0x8d2/0xb30 [ 30.928915] do_mprotect_pkey+0x87e/0xd40 [ 30.929627] __x64_sys_mprotect+0x78/0xc0 [ 30.930345] do_syscall_64+0x3f/0x90 [ 30.931001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931884] [ 30.932178] Freed by task 213: [ 30.932732] kasan_save_stack+0x22/0x50 [ 30.933419] kasan_set_track+0x25/0x30 [ 30.934105] kasan_save_free_info+0x2b/0x50 [ 30.934836] __kasan_slab_free+0x10a/0x190 [ 30.935574] kmem_cache_free+0x10d/0x4d0 [ 30.936273] rcu_core+0x8c8/0x2860 [ 30.936892] __do_softirq+0x1b7/0x7d4 [ 30.937552] [ 30.937848] Last potentially related work creation: [ 30.938644] kasan_save_stack+0x22/0x50 [ 30.939337] __kasan_record_aux_stack+0x8e/0xa0 [ 30.940128] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.941041] remove_vma+0x139/0x170 [ 30.941668] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.942428] do_vmi_munmap+0x1f1/0x2b0 [ 30.943033] __vm_munmap+0x138/0x3a0 [ 30.943517] __x64_sys_munmap+0x59/0x80 [ 30.944037] do_syscall_64+0x3f/0x90 [ 30.944545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.945211] [ 30.945427] The buggy address belongs to the object at ffff88801a1e4000 [ 30.945427] which belongs to the cache vm_area_struct of size 168 [ 30.946981] The buggy address is located 88 bytes inside of [ 30.946981] freed 168-byte region [ffff88801a1e4000, ffff88801a1e40a8) [ 30.948521] [ 30.948745] The buggy address belongs to the physical page: [ 30.949422] page:0000000048ac9b12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1e4 [ 30.950513] memcg:ffff88800daff201 [ 30.950936] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.951630] page_type: 0xffffffff() [ 30.952094] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.953048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daff201 [ 30.953975] page dumped because: kasan: bad access detected [ 30.954646] [ 30.954865] Memory state around the buggy address: [ 30.955508] ffff88801a1e3f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.956382] ffff88801a1e3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.957260] >ffff88801a1e4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.958121] ^ [ 30.958852] ffff88801a1e4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.959740] ffff88801a1e4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.960893] ================================================================== [ 30.962015] Disabling lock debugging due to kernel taint [ 33.337879] BUG: Bad rss-counter state mm:00000000dc92d189 type:MM_FILEPAGES val:33 [ 33.338867] BUG: Bad rss-counter state mm:00000000dc92d189 type:MM_ANONPAGES val:22 [ 33.838436] BUG: Bad rss-counter state mm:00000000d3b4a428 type:MM_FILEPAGES val:33 [ 33.839430] BUG: Bad rss-counter state mm:00000000d3b4a428 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43458' (ECDSA) to the list of known hosts. 2023/06/20 16:48:02 fuzzer started 2023/06/20 16:48:02 dialing manager at localhost:36067 2023/06/20 16:48:02 checking machine... 2023/06/20 16:48:02 checking revisions... [ 34.552792] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:48:02 testing simple program... [ 34.607822] cgroup: Unknown subsys name 'net' [ 34.663328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fab19e90080 CR3=000000000e622000 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=2032303a38343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a38343a3631203032 XMM08=3d656e696c646d632022656369767265 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=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=00007f1287a3c618 CR3=000000000dede000 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