syzkaller login: [ 31.118692] BUG: Bad rss-counter state mm:00000000ba87b705 type:MM_FILEPAGES val:33 [ 31.120036] BUG: Bad rss-counter state mm:00000000ba87b705 type:MM_ANONPAGES val:22 [ 31.271700] ================================================================== [ 31.272628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.273565] Read of size 8 at addr ffff8880095f84e0 by task sshd/220 [ 31.274445] [ 31.274669] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.275531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.276498] Call Trace: [ 31.276814] [ 31.277093] dump_stack_lvl+0x91/0xf0 [ 31.277584] print_report+0xcc/0x620 [ 31.278067] ? __virt_addr_valid+0x102/0x340 [ 31.278611] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279228] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279834] kasan_report+0xbe/0xf0 [ 31.280306] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280922] vma_interval_tree_remove+0xc75/0xec0 [ 31.281518] vma_prepare+0xc54/0x11a0 [ 31.281993] __split_vma+0x5af/0x950 [ 31.282457] ? __pfx___split_vma+0x10/0x10 [ 31.282983] ? find_held_lock+0x2c/0x110 [ 31.283533] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.284089] ? lock_is_held_type+0x9f/0x120 [ 31.284634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.285230] ? mtree_range_walk+0x632/0x900 [ 31.285782] ? mas_walk+0x5c7/0x7c0 [ 31.286252] do_vmi_munmap+0x1f1/0x2b0 [ 31.286742] mmap_region+0x1f9/0x2660 [ 31.287237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288461] ? __pfx_lock_acquire+0x10/0x10 [ 31.289021] ? __pfx_mmap_region+0x10/0x10 [ 31.289550] ? security_mmap_addr+0x7d/0xa0 [ 31.290077] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290617] do_mmap+0x854/0xf00 [ 31.291079] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292131] ksys_mmap_pgoff+0x3af/0x500 [ 31.292631] do_syscall_64+0x3f/0x90 [ 31.293103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293752] RIP: 0033:0x7f479c1f5d82 [ 31.294206] 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 [ 31.296335] RSP: 002b:00007fff7307b018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f479c1f5d82 [ 31.298067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f479b62f000 [ 31.298920] RBP: 00007f479b62f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.299787] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e039b6cec0 [ 31.300626] R13: 00007fff7307b030 R14: 00007fff7307b060 R15: 00007fff7307b3c0 [ 31.301470] [ 31.301764] [ 31.301978] Allocated by task 213: [ 31.302403] kasan_save_stack+0x22/0x50 [ 31.302909] kasan_set_track+0x25/0x30 [ 31.303408] __kasan_slab_alloc+0x59/0x70 [ 31.303936] kmem_cache_alloc+0x16b/0x370 [ 31.304448] vm_area_dup+0x20/0x160 [ 31.304903] __split_vma+0x170/0x950 [ 31.305367] split_vma+0xc6/0x110 [ 31.305815] mprotect_fixup+0x8d2/0xb30 [ 31.306313] do_mprotect_pkey+0x87e/0xd40 [ 31.306832] __x64_sys_mprotect+0x78/0xc0 [ 31.307350] do_syscall_64+0x3f/0x90 [ 31.307823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308461] [ 31.308674] Freed by task 213: [ 31.309060] kasan_save_stack+0x22/0x50 [ 31.309564] kasan_set_track+0x25/0x30 [ 31.310060] kasan_save_free_info+0x2b/0x50 [ 31.310589] __kasan_slab_free+0x10a/0x190 [ 31.311137] kmem_cache_free+0x10d/0x4d0 [ 31.311640] rcu_core+0x8c8/0x2860 [ 31.312092] __do_softirq+0x1b7/0x7d4 [ 31.312574] [ 31.312786] Last potentially related work creation: [ 31.313367] kasan_save_stack+0x22/0x50 [ 31.313865] __kasan_record_aux_stack+0x8e/0xa0 [ 31.314434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.315077] remove_vma+0x139/0x170 [ 31.315528] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.316082] do_vmi_munmap+0x1f1/0x2b0 [ 31.316566] __vm_munmap+0x138/0x3a0 [ 31.317039] __x64_sys_munmap+0x59/0x80 [ 31.317530] do_syscall_64+0x3f/0x90 [ 31.318001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318642] [ 31.318855] The buggy address belongs to the object at ffff8880095f8488 [ 31.318855] which belongs to the cache vm_area_struct of size 168 [ 31.320315] The buggy address is located 88 bytes inside of [ 31.320315] freed 168-byte region [ffff8880095f8488, ffff8880095f8530) [ 31.321714] [ 31.321928] The buggy address belongs to the physical page: [ 31.322582] page:00000000c9c5a862 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95f8 [ 31.323679] memcg:ffff88800e17b301 [ 31.324098] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.324737] page_type: 0xffffffff() [ 31.325189] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f6bc0 dead000000000008 [ 31.326108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e17b301 [ 31.327038] page dumped because: kasan: bad access detected [ 31.327687] [ 31.327900] Memory state around the buggy address: [ 31.328475] ffff8880095f8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.329338] ffff8880095f8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.330184] >ffff8880095f8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331062] ^ [ 31.331811] ffff8880095f8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.332654] ffff8880095f8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.333506] ================================================================== [ 31.334462] Disabling lock debugging due to kernel taint [ 33.114537] BUG: Bad rss-counter state mm:000000002c78f924 type:MM_FILEPAGES val:33 [ 33.116252] BUG: Bad rss-counter state mm:000000002c78f924 type:MM_ANONPAGES val:22 [ 33.654623] BUG: Bad rss-counter state mm:0000000055eea87f type:MM_FILEPAGES val:33 [ 33.655978] BUG: Bad rss-counter state mm:0000000055eea87f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10655' (ECDSA) to the list of known hosts. 2023/06/21 05:08:57 fuzzer started 2023/06/21 05:08:57 dialing manager at localhost:36067 2023/06/21 05:08:57 checking machine... 2023/06/21 05:08:57 checking revisions... [ 34.253885] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:08:57 testing simple program... [ 34.307844] cgroup: Unknown subsys name 'net' [ 34.361267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:08:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000008000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81b3c240 RDI=ffff888018830c6c RBP=ffff888019982ed0 RSP=ffff88800f1e77a8 R8 =0000000000000003 R9 =0000000000008000 R10=0000000000008000 R11=00000000000b6a61 R12=ffff888018830c00 R13=ffff88801435b3c8 R14=ffff888019982a50 R15=ffff88800f1e78d0 RIP=ffffffff81b3c25a RFL=00000217 [----APC] 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 00007ff33d809700 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=00007f0c9407a01c CR3=0000000015e26000 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=2036353a38303a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a38303a3530203132 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=00007fe4a71ccbf0 CR3=000000000cb6c000 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=d09eeaf6032f918e0b443e1a54e06e4b XMM02=000000000011c638eff9b2d0a8fce9cb XMM03=000000000011c7082c67c8bc2e329bc3 XMM04=f5e623fe3d9fe1d500000000000ae988 XMM05=c96c9d10857b92cb0000000000133f20 XMM06=4fda316b135da52b0000000000132d10 XMM07=fb795ef6d65770560000000000123048 XMM08=2c67c8bc2e329bc3000000000011c6a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000