syzkaller login: [ 33.031865] BUG: Bad rss-counter state mm:0000000049690ab6 type:MM_FILEPAGES val:33 [ 33.033043] BUG: Bad rss-counter state mm:0000000049690ab6 type:MM_ANONPAGES val:22 [ 33.071198] ================================================================== [ 33.072149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.073086] Read of size 8 at addr ffff88800ee7edf0 by task sshd/219 [ 33.073851] [ 33.074081] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.074949] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.075928] Call Trace: [ 33.076256] [ 33.076546] dump_stack_lvl+0x91/0xf0 [ 33.077039] print_report+0xcc/0x620 [ 33.077535] ? __virt_addr_valid+0x102/0x340 [ 33.078119] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.078742] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.079363] kasan_report+0xbe/0xf0 [ 33.079844] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.080460] vma_interval_tree_remove+0xc75/0xec0 [ 33.081070] vma_prepare+0xc54/0x11a0 [ 33.081548] __split_vma+0x5af/0x950 [ 33.082141] ? __pfx___split_vma+0x10/0x10 [ 33.082667] ? find_held_lock+0x2c/0x110 [ 33.083183] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.083752] ? lock_is_held_type+0x9f/0x120 [ 33.084307] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.084915] ? mtree_range_walk+0x632/0x900 [ 33.085463] ? mas_walk+0x5c7/0x7c0 [ 33.085941] do_vmi_munmap+0x1f1/0x2b0 [ 33.086464] mmap_region+0x1f9/0x2660 [ 33.086953] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.087467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.088182] ? __pfx_lock_acquire+0x10/0x10 [ 33.088718] ? __pfx_mmap_region+0x10/0x10 [ 33.089248] ? security_mmap_addr+0x7d/0xa0 [ 33.089776] ? get_unmapped_area+0x1f5/0x3f0 [ 33.090339] do_mmap+0x854/0xf00 [ 33.090778] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.091270] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.091830] ksys_mmap_pgoff+0x3af/0x500 [ 33.092336] do_syscall_64+0x3f/0x90 [ 33.092813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.093459] RIP: 0033:0x7f2854453d82 [ 33.093912] 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 [ 33.096057] RSP: 002b:00007fff6ddc3f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.096965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2854453d82 [ 33.097840] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f285388d000 [ 33.098708] RBP: 00007f285388d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.099566] R10: 0000000000000812 R11: 0000000000000206 R12: 000056316d62af70 [ 33.100409] R13: 00007fff6ddc3f50 R14: 00007fff6ddc3f80 R15: 00007fff6ddc42e0 [ 33.101270] [ 33.101562] [ 33.101772] Allocated by task 212: [ 33.102212] kasan_save_stack+0x22/0x50 [ 33.102723] kasan_set_track+0x25/0x30 [ 33.103212] __kasan_slab_alloc+0x59/0x70 [ 33.103737] kmem_cache_alloc+0x16b/0x370 [ 33.104264] vm_area_dup+0x20/0x160 [ 33.104718] __split_vma+0x170/0x950 [ 33.105185] split_vma+0xc6/0x110 [ 33.105627] mprotect_fixup+0x8d2/0xb30 [ 33.106149] do_mprotect_pkey+0x87e/0xd40 [ 33.106675] __x64_sys_mprotect+0x78/0xc0 [ 33.107218] do_syscall_64+0x3f/0x90 [ 33.107693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.108330] [ 33.108550] Freed by task 212: [ 33.108947] kasan_save_stack+0x22/0x50 [ 33.109453] kasan_set_track+0x25/0x30 [ 33.109955] kasan_save_free_info+0x2b/0x50 [ 33.110491] __kasan_slab_free+0x10a/0x190 [ 33.111019] kmem_cache_free+0x10d/0x4d0 [ 33.111521] rcu_core+0x8c8/0x2860 [ 33.111962] __do_softirq+0x1b7/0x7d4 [ 33.112436] [ 33.112652] Last potentially related work creation: [ 33.113238] kasan_save_stack+0x22/0x50 [ 33.113740] __kasan_record_aux_stack+0x8e/0xa0 [ 33.114334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.114972] remove_vma+0x139/0x170 [ 33.115422] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.115982] do_vmi_munmap+0x1f1/0x2b0 [ 33.116478] __vm_munmap+0x138/0x3a0 [ 33.116925] __x64_sys_munmap+0x59/0x80 [ 33.117395] do_syscall_64+0x3f/0x90 [ 33.117846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.118458] [ 33.118664] The buggy address belongs to the object at ffff88800ee7ed98 [ 33.118664] which belongs to the cache vm_area_struct of size 168 [ 33.120052] The buggy address is located 88 bytes inside of [ 33.120052] freed 168-byte region [ffff88800ee7ed98, ffff88800ee7ee40) [ 33.121379] [ 33.121585] The buggy address belongs to the physical page: [ 33.122227] page:000000007e80dfd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee7e [ 33.123247] memcg:ffff88800946ef01 [ 33.123647] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.124299] page_type: 0xffffffff() [ 33.124729] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.125630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800946ef01 [ 33.126555] page dumped because: kasan: bad access detected [ 33.127210] [ 33.127422] Memory state around the buggy address: [ 33.128000] ffff88800ee7ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.128850] ffff88800ee7ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.129694] >ffff88800ee7ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.130550] ^ [ 33.131358] ffff88800ee7ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.132216] ffff88800ee7ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.133057] ================================================================== [ 33.134251] Disabling lock debugging due to kernel taint [ 34.638240] BUG: Bad rss-counter state mm:00000000cbb9d5ac type:MM_FILEPAGES val:33 [ 34.639239] BUG: Bad rss-counter state mm:00000000cbb9d5ac type:MM_ANONPAGES val:22 [ 35.087247] BUG: Bad rss-counter state mm:00000000ee4ff8b8 type:MM_FILEPAGES val:33 [ 35.088245] BUG: Bad rss-counter state mm:00000000ee4ff8b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6926' (ECDSA) to the list of known hosts. 2023/06/19 19:13:59 fuzzer started 2023/06/19 19:13:59 dialing manager at localhost:44161 2023/06/19 19:13:59 checking machine... 2023/06/19 19:13:59 checking revisions... [ 35.810178] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:13:59 testing simple program... [ 35.859873] cgroup: Unknown subsys name 'net' [ 35.911780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:13:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff0ffbe708 CR3=0000000008ef0000 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=2039353a33313a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33313a3931203931 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fd83cf7c6a0 CR3=000000000976e000 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=6f1e777e1a640fbd594ac704e8eedc38 XMM02=000000000011e060ec2efd57dc4c00df XMM03=0000000000124618f3d37cd00ebde505 XMM04=9d167a629761015500000000000ae988 XMM05=85d0085646922e9300000000001350c0 XMM06=806171799158d9670000000000133df0 XMM07=e042d86d42eb936e00000000001248f0 XMM08=f3d37cd00ebde505000000000011e0c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000