syzkaller login: [ 28.883075] BUG: Bad rss-counter state mm:00000000c5a1b361 type:MM_FILEPAGES val:33 [ 28.884362] BUG: Bad rss-counter state mm:00000000c5a1b361 type:MM_ANONPAGES val:22 [ 28.922641] ================================================================== [ 28.923341] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.924183] Read of size 8 at addr ffff88800f089a50 by task sshd/220 [ 28.924766] [ 28.924932] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.925586] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.926450] Call Trace: [ 28.926694] [ 28.926912] dump_stack_lvl+0x91/0xf0 [ 28.927291] print_report+0xcc/0x620 [ 28.927666] ? __virt_addr_valid+0x102/0x340 [ 28.928122] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.928594] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.929069] kasan_report+0xbe/0xf0 [ 28.929429] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.929898] vma_interval_tree_remove+0xc75/0xec0 [ 28.930357] vma_prepare+0xc54/0x11a0 [ 28.930729] __split_vma+0x5af/0x950 [ 28.931085] ? __pfx___split_vma+0x10/0x10 [ 28.931488] ? find_held_lock+0x2c/0x110 [ 28.931902] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.932339] ? lock_is_held_type+0x9f/0x120 [ 28.932750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.933227] ? mtree_range_walk+0x632/0x900 [ 28.933652] ? mas_walk+0x5c7/0x7c0 [ 28.934016] do_vmi_munmap+0x1f1/0x2b0 [ 28.934389] mmap_region+0x1f9/0x2660 [ 28.934753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.935141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.935686] ? __pfx_lock_acquire+0x10/0x10 [ 28.936117] ? __pfx_mmap_region+0x10/0x10 [ 28.936516] ? security_mmap_addr+0x7d/0xa0 [ 28.936929] ? get_unmapped_area+0x1f5/0x3f0 [ 28.937349] do_mmap+0x854/0xf00 [ 28.937690] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.938066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.938497] ksys_mmap_pgoff+0x3af/0x500 [ 28.938892] do_syscall_64+0x3f/0x90 [ 28.939254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.939758] RIP: 0033:0x7f1936df3d82 [ 28.940117] 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 [ 28.941766] RSP: 002b:00007fff73939ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.942470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1936df3d82 [ 28.943118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f193622d000 [ 28.943786] RBP: 00007f193622d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.944451] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588b56a9b20 [ 28.945106] R13: 00007fff7393a010 R14: 00007fff7393a040 R15: 00007fff7393a3a0 [ 28.945775] [ 28.946002] [ 28.946175] Allocated by task 213: [ 28.946520] kasan_save_stack+0x22/0x50 [ 28.946933] kasan_set_track+0x25/0x30 [ 28.947330] __kasan_slab_alloc+0x59/0x70 [ 28.947756] kmem_cache_alloc+0x16b/0x370 [ 28.948184] vm_area_dup+0x20/0x160 [ 28.948550] __split_vma+0x170/0x950 [ 28.948928] split_vma+0xc6/0x110 [ 28.949289] mprotect_fixup+0x8d2/0xb30 [ 28.949692] do_mprotect_pkey+0x87e/0xd40 [ 28.950108] __x64_sys_mprotect+0x78/0xc0 [ 28.950533] do_syscall_64+0x3f/0x90 [ 28.950917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951426] [ 28.951595] Freed by task 213: [ 28.951905] kasan_save_stack+0x22/0x50 [ 28.952317] kasan_set_track+0x25/0x30 [ 28.952715] kasan_save_free_info+0x2b/0x50 [ 28.953137] __kasan_slab_free+0x10a/0x190 [ 28.953560] kmem_cache_free+0x10d/0x4d0 [ 28.953968] rcu_core+0x8c8/0x2860 [ 28.954310] __do_softirq+0x1b7/0x7d4 [ 28.954679] [ 28.954844] Last potentially related work creation: [ 28.955298] kasan_save_stack+0x22/0x50 [ 28.955682] __kasan_record_aux_stack+0x8e/0xa0 [ 28.956124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.956618] remove_vma+0x139/0x170 [ 28.956967] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.957400] do_vmi_munmap+0x1f1/0x2b0 [ 28.957776] __vm_munmap+0x138/0x3a0 [ 28.958135] __x64_sys_munmap+0x59/0x80 [ 28.958518] do_syscall_64+0x3f/0x90 [ 28.958887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.959375] [ 28.959537] The buggy address belongs to the object at ffff88800f0899f8 [ 28.959537] which belongs to the cache vm_area_struct of size 168 [ 28.960690] The buggy address is located 88 bytes inside of [ 28.960690] freed 168-byte region [ffff88800f0899f8, ffff88800f089aa0) [ 28.961778] [ 28.961942] The buggy address belongs to the physical page: [ 28.962453] page:0000000046b2c9a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf089 [ 28.963288] memcg:ffff88800f8f1801 [ 28.963613] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.964119] page_type: 0xffffffff() [ 28.964464] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.965172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f8f1801 [ 28.965871] page dumped because: kasan: bad access detected [ 28.966380] [ 28.966543] Memory state around the buggy address: [ 28.966985] ffff88800f089900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.967639] ffff88800f089980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.968313] >ffff88800f089a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.968964] ^ [ 28.969495] ffff88800f089a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.970149] ffff88800f089b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.970800] ================================================================== [ 28.971790] Disabling lock debugging due to kernel taint [ 30.769748] BUG: Bad rss-counter state mm:00000000a1600709 type:MM_FILEPAGES val:33 [ 30.771055] BUG: Bad rss-counter state mm:00000000a1600709 type:MM_ANONPAGES val:22 [ 31.181701] BUG: Bad rss-counter state mm:00000000396d769b type:MM_FILEPAGES val:33 [ 31.183194] BUG: Bad rss-counter state mm:00000000396d769b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11860' (ECDSA) to the list of known hosts. 2023/06/21 05:47:16 fuzzer started 2023/06/21 05:47:16 dialing manager at localhost:36067 2023/06/21 05:47:16 checking machine... 2023/06/21 05:47:16 checking revisions... [ 31.966002] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:47:16 testing simple program... [ 32.008707] cgroup: Unknown subsys name 'net' [ 32.077238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:47:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8608a556 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce099b8 R8 =ffffffff8608a55a R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09b20 R15=ffff88806ce09a78 RIP=ffffffff81131153 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 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=00007ffddd0394a8 CR3=000000000f20e000 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=2035313a37343a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37343a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b7261 RBX=0000000000000001 RCX=ffffffff863b725c RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c76e4c RBP=ffff88800fd5f2e8 RSP=ffff88800fd5f220 R8 =ffffffff863b7260 R9 =ffff88800fd5f2d0 R10=0000000000038001 R11=000000000008b38e R12=ffff88800fd5f2f0 R13=ffff88800fd5f2d8 R14=ffff88800fd5f2d1 R15=ffff88800fd5f290 RIP=ffffffff81130aa4 RFL=00000212 [----A--] 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 00007f8cc2bf0900 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=00007f8cc31a7618 CR3=000000000dfae000 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