syzkaller login: [ 34.789060] BUG: Bad rss-counter state mm:00000000be297ca7 type:MM_FILEPAGES val:33 [ 34.790235] BUG: Bad rss-counter state mm:00000000be297ca7 type:MM_ANONPAGES val:22 [ 34.927709] ================================================================== [ 34.928632] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.929602] Read of size 8 at addr ffff888013a21c20 by task sshd/221 [ 34.930378] [ 34.930606] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.931604] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.932585] Call Trace: [ 34.932907] [ 34.933191] dump_stack_lvl+0x91/0xf0 [ 34.933704] print_report+0xcc/0x620 [ 34.934197] ? __virt_addr_valid+0x102/0x340 [ 34.934753] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.935376] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.935994] kasan_report+0xbe/0xf0 [ 34.936473] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.937113] vma_interval_tree_remove+0xc75/0xec0 [ 34.937744] vma_prepare+0xc54/0x11a0 [ 34.938224] __split_vma+0x5af/0x950 [ 34.938703] ? __pfx___split_vma+0x10/0x10 [ 34.939233] ? find_held_lock+0x2c/0x110 [ 34.939766] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.940331] ? lock_is_held_type+0x9f/0x120 [ 34.940879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.941496] ? mtree_range_walk+0x632/0x900 [ 34.942052] ? mas_walk+0x5c7/0x7c0 [ 34.942530] do_vmi_munmap+0x1f1/0x2b0 [ 34.943030] mmap_region+0x1f9/0x2660 [ 34.943513] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.944026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.944746] ? __pfx_lock_acquire+0x10/0x10 [ 34.945294] ? __pfx_mmap_region+0x10/0x10 [ 34.945832] ? security_mmap_addr+0x7d/0xa0 [ 34.946366] ? get_unmapped_area+0x1f5/0x3f0 [ 34.946916] do_mmap+0x854/0xf00 [ 34.947355] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.947851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.948412] ksys_mmap_pgoff+0x3af/0x500 [ 34.948925] do_syscall_64+0x3f/0x90 [ 34.949414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.950064] RIP: 0033:0x7f8470376d82 [ 34.950517] 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 [ 34.952623] RSP: 002b:00007ffe4a29d088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.953551] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8470376d82 [ 34.954392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f846f7b0000 [ 34.955235] RBP: 00007f846f7b0000 R08: 0000000000000009 R09: 0000000000001000 [ 34.956077] R10: 0000000000000812 R11: 0000000000000206 R12: 000056201fcbdf70 [ 34.956923] R13: 00007ffe4a29d0a0 R14: 00007ffe4a29d0d0 R15: 00007ffe4a29d430 [ 34.957800] [ 34.958091] [ 34.958312] Allocated by task 214: [ 34.958746] kasan_save_stack+0x22/0x50 [ 34.959253] kasan_set_track+0x25/0x30 [ 34.959753] __kasan_slab_alloc+0x59/0x70 [ 34.960282] kmem_cache_alloc+0x16b/0x370 [ 34.960801] vm_area_dup+0x20/0x160 [ 34.961274] __split_vma+0x170/0x950 [ 34.961748] split_vma+0xc6/0x110 [ 34.962196] mprotect_fixup+0x8d2/0xb30 [ 34.962701] do_mprotect_pkey+0x87e/0xd40 [ 34.963234] __x64_sys_mprotect+0x78/0xc0 [ 34.963762] do_syscall_64+0x3f/0x90 [ 34.964240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.964886] [ 34.965103] Freed by task 214: [ 34.965512] kasan_save_stack+0x22/0x50 [ 34.966015] kasan_set_track+0x25/0x30 [ 34.966514] kasan_save_free_info+0x2b/0x50 [ 34.967043] __kasan_slab_free+0x10a/0x190 [ 34.967573] kmem_cache_free+0x10d/0x4d0 [ 34.968082] rcu_core+0x8c8/0x2860 [ 34.968532] __do_softirq+0x1b7/0x7d4 [ 34.969009] [ 34.969227] Last potentially related work creation: [ 34.969822] kasan_save_stack+0x22/0x50 [ 34.970332] __kasan_record_aux_stack+0x8e/0xa0 [ 34.970908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.971564] remove_vma+0x139/0x170 [ 34.972024] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.972648] do_vmi_munmap+0x1f1/0x2b0 [ 34.973134] __vm_munmap+0x138/0x3a0 [ 34.973617] __x64_sys_munmap+0x59/0x80 [ 34.974123] do_syscall_64+0x3f/0x90 [ 34.974605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.975245] [ 34.975462] Second to last potentially related work creation: [ 34.976146] kasan_save_stack+0x22/0x50 [ 34.976646] __kasan_record_aux_stack+0x8e/0xa0 [ 34.977222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.977870] remove_vma+0x139/0x170 [ 34.978327] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.978892] do_vmi_munmap+0x1f1/0x2b0 [ 34.979378] mmap_region+0x1f9/0x2660 [ 34.979860] do_mmap+0x854/0xf00 [ 34.980294] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.980787] ksys_mmap_pgoff+0x3af/0x500 [ 34.981302] do_syscall_64+0x3f/0x90 [ 34.981777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.982420] [ 34.982633] The buggy address belongs to the object at ffff888013a21bc8 [ 34.982633] which belongs to the cache vm_area_struct of size 168 [ 34.984102] The buggy address is located 88 bytes inside of [ 34.984102] freed 168-byte region [ffff888013a21bc8, ffff888013a21c70) [ 34.985517] [ 34.985737] The buggy address belongs to the physical page: [ 34.986402] page:00000000e27ee969 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13a21 [ 34.987521] memcg:ffff88800f131501 [ 34.987952] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.988607] page_type: 0xffffffff() [ 34.989056] raw: 0100000000000200 ffff88800879fc80 ffffea00003bc040 dead000000000008 [ 34.990004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f131501 [ 34.990917] page dumped because: kasan: bad access detected [ 34.991590] [ 34.991806] Memory state around the buggy address: [ 34.992397] ffff888013a21b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.993267] ffff888013a21b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.994137] >ffff888013a21c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.994996] ^ [ 34.995523] ffff888013a21c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.996388] ffff888013a21d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.997283] ================================================================== [ 34.998238] Disabling lock debugging due to kernel taint [ 36.992276] BUG: Bad rss-counter state mm:00000000c850f149 type:MM_FILEPAGES val:33 [ 36.993338] BUG: Bad rss-counter state mm:00000000c850f149 type:MM_ANONPAGES val:22 [ 37.452387] BUG: Bad rss-counter state mm:00000000c200682c type:MM_FILEPAGES val:33 [ 37.453484] BUG: Bad rss-counter state mm:00000000c200682c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50216' (ECDSA) to the list of known hosts. 2023/06/20 02:41:22 fuzzer started 2023/06/20 02:41:22 dialing manager at localhost:44161 2023/06/20 02:41:22 checking machine... 2023/06/20 02:41:22 checking revisions... [ 38.204649] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:41:22 testing simple program... [ 38.255265] cgroup: Unknown subsys name 'net' [ 38.316861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:17 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=ffff88800ec4b800 RCX=ffffea00003b1281 RDX=ffffea00003b1280 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=0000000000000000 RSP=ffff88800c4874e0 R8 =ffff88800ec4b800 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000c000b R12=dffffc0000000000 R13=ffff88800c487520 R14=0000000000000000 R15=ffff8880094ff500 RIP=ffffffff81810227 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 00007f410c6ca900 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=00007f410cc81618 CR3=000000000c684000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f844901dc90 CR3=000000000ee3a000 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=3d4ffaa64680c0933248168e5b8e7679 XMM02=000000000011e338eff9b2d0a8fce9cb XMM03=000000000011e4082c67c8bc2e329bc3 XMM04=e789d1d789ea1b4600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133f60 XMM06=25bbc9593a7a9bf40000000000132660 XMM07=e042d86d42eb936e0000000000123308 XMM08=15859db8ae99ba90000000000011e408 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000