syzkaller login: [ 161.939071] BUG: Bad rss-counter state mm:00000000094c6f5b type:MM_FILEPAGES val:33 [ 161.939623] BUG: Bad rss-counter state mm:00000000094c6f5b type:MM_ANONPAGES val:22 [ 162.071523] ================================================================== [ 162.072177] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 162.072861] Read of size 8 at addr ffff888019ca8a50 by task sshd/219 [ 162.073398] [ 162.073554] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 162.074275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 162.074954] Call Trace: [ 162.075204] <TASK> [ 162.075409] dump_stack_lvl+0x91/0xf0 [ 162.075802] print_report+0xcc/0x620 [ 162.076249] ? __virt_addr_valid+0x102/0x340 [ 162.076652] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.077089] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.077530] kasan_report+0xbe/0xf0 [ 162.077868] ? vma_interval_tree_remove+0xc75/0xec0 [ 162.078315] vma_interval_tree_remove+0xc75/0xec0 [ 162.078746] vma_prepare+0xc54/0x11a0 [ 162.079098] __split_vma+0x5af/0x950 [ 162.079434] ? __pfx___split_vma+0x10/0x10 [ 162.079817] ? find_held_lock+0x2c/0x110 [ 162.080189] do_vmi_align_munmap+0x2ba/0x11f0 [ 162.080613] ? lock_is_held_type+0x9f/0x120 [ 162.080997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 162.081419] ? mtree_range_walk+0x632/0x900 [ 162.081825] ? mas_walk+0x5c7/0x7c0 [ 162.082162] do_vmi_munmap+0x1f1/0x2b0 [ 162.082515] mmap_region+0x1f9/0x2660 [ 162.082855] ? vm_mmap_pgoff+0x15c/0x3a0 [ 162.083229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 162.083740] ? __pfx_lock_acquire+0x10/0x10 [ 162.084119] ? __pfx_mmap_region+0x10/0x10 [ 162.084506] ? security_mmap_addr+0x7d/0xa0 [ 162.084883] ? get_unmapped_area+0x1f5/0x3f0 [ 162.085269] do_mmap+0x854/0xf00 [ 162.085599] vm_mmap_pgoff+0x1a6/0x3a0 [ 162.085948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 162.086346] ksys_mmap_pgoff+0x3af/0x500 [ 162.086715] do_syscall_64+0x3f/0x90 [ 162.087076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.087539] RIP: 0033:0x7f5dc5412d82 [ 162.087863] 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 [ 162.089194] RSP: 002b:00007ffc8d5ce928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 162.089716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5dc5412d82 [ 162.090199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5dc484c000 [ 162.090698] RBP: 00007f5dc484c000 R08: 0000000000000009 R09: 0000000000001000 [ 162.091190] R10: 0000000000000812 R11: 0000000000000206 R12: 000055951d621ec0 [ 162.091678] R13: 00007ffc8d5ce940 R14: 00007ffc8d5ce970 R15: 00007ffc8d5cecd0 [ 162.092163] </TASK> [ 162.092332] [ 162.092462] Allocated by task 212: [ 162.092708] kasan_save_stack+0x22/0x50 [ 162.092997] kasan_set_track+0x25/0x30 [ 162.093280] __kasan_slab_alloc+0x59/0x70 [ 162.093592] kmem_cache_alloc+0x16b/0x370 [ 162.093887] vm_area_dup+0x20/0x160 [ 162.094149] __split_vma+0x170/0x950 [ 162.094414] split_vma+0xc6/0x110 [ 162.094673] mprotect_fixup+0x8d2/0xb30 [ 162.094960] do_mprotect_pkey+0x87e/0xd40 [ 162.095266] __x64_sys_mprotect+0x78/0xc0 [ 162.095580] do_syscall_64+0x3f/0x90 [ 162.095853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.096221] [ 162.096347] Freed by task 212: [ 162.096578] kasan_save_stack+0x22/0x50 [ 162.096868] kasan_set_track+0x25/0x30 [ 162.097155] kasan_save_free_info+0x2b/0x50 [ 162.097472] __kasan_slab_free+0x10a/0x190 [ 162.097779] kmem_cache_free+0x10d/0x4d0 [ 162.098068] rcu_core+0x8c8/0x2860 [ 162.098325] __do_softirq+0x1b7/0x7d4 [ 162.098605] [ 162.098729] Last potentially related work creation: [ 162.099080] kasan_save_stack+0x22/0x50 [ 162.099371] __kasan_record_aux_stack+0x8e/0xa0 [ 162.099708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 162.100080] remove_vma+0x139/0x170 [ 162.100341] do_vmi_align_munmap+0xd4a/0x11f0 [ 162.100675] do_vmi_munmap+0x1f1/0x2b0 [ 162.100956] __vm_munmap+0x138/0x3a0 [ 162.101224] __x64_sys_munmap+0x59/0x80 [ 162.101516] do_syscall_64+0x3f/0x90 [ 162.101789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.102154] [ 162.102278] Second to last potentially related work creation: [ 162.102673] kasan_save_stack+0x22/0x50 [ 162.102965] __kasan_record_aux_stack+0x8e/0xa0 [ 162.103307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 162.103683] remove_vma+0x139/0x170 [ 162.103943] do_vmi_align_munmap+0xd4a/0x11f0 [ 162.104265] do_vmi_munmap+0x1f1/0x2b0 [ 162.104550] mmap_region+0x1f9/0x2660 [ 162.104824] do_mmap+0x854/0xf00 [ 162.105072] vm_mmap_pgoff+0x1a6/0x3a0 [ 162.105352] ksys_mmap_pgoff+0x3af/0x500 [ 162.105652] do_syscall_64+0x3f/0x90 [ 162.105926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 162.106294] [ 162.106418] The buggy address belongs to the object at ffff888019ca89f8 [ 162.106418] which belongs to the cache vm_area_struct of size 168 [ 162.107275] The buggy address is located 88 bytes inside of [ 162.107275] freed 168-byte region [ffff888019ca89f8, ffff888019ca8aa0) [ 162.108082] [ 162.108208] The buggy address belongs to the physical page: [ 162.108594] page:00000000ee4059b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ca8 [ 162.109216] memcg:ffff888019ca9001 [ 162.109466] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 162.109870] page_type: 0xffffffff() [ 162.110133] raw: 0100000000000200 ffff88800879fc80 ffffea00005a9ec0 0000000000000005 [ 162.110672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ca9001 [ 162.111197] page dumped because: kasan: bad access detected [ 162.111577] [ 162.111702] Memory state around the buggy address: [ 162.112032] ffff888019ca8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 162.112530] ffff888019ca8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 162.113019] >ffff888019ca8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 162.113511] ^ [ 162.113909] ffff888019ca8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 162.114396] ffff888019ca8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 162.114888] ================================================================== [ 162.115523] Disabling lock debugging due to kernel taint [ 165.020561] BUG: Bad rss-counter state mm:00000000dcafe551 type:MM_FILEPAGES val:33 [ 165.021925] BUG: Bad rss-counter state mm:00000000dcafe551 type:MM_ANONPAGES val:22 [ 165.674090] BUG: Bad rss-counter state mm:0000000099a42af5 type:MM_FILEPAGES val:33 [ 165.675484] BUG: Bad rss-counter state mm:0000000099a42af5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48671' (ECDSA) to the list of known hosts. 2023/06/20 08:57:03 fuzzer started 2023/06/20 08:57:04 dialing manager at localhost:44161 2023/06/20 08:57:04 checking machine... 2023/06/20 08:57:04 checking revisions... [ 166.558513] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:57:04 testing simple program... [ 166.618127] cgroup: Unknown subsys name 'net' [ 166.671469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:54:51 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=000055ca29c34000 CR3=000000000da48000 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=37353a3830203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34373430342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343734 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=000000000000132f RSI=000000000000132f RDI=ffffffff864ec87c RBP=ffff8880147a79e0 RSP=ffff8880147a78c8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=ffffffff81806df1 R12=ffff8880147a79e8 R13=ffff8880147a79d0 R14=ffff8880147a79c9 R15=ffff8880147a7988 RIP=ffffffff8113077a 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 00007fdc104a1900 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=000055ca29bfa748 CR3=000000000caa0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=21caf3d76baaf3c900000000000ae988 XMM05=e8779d9bc178e5070000000000162968 XMM06=dfcdbad4f1609c370000000000161ab0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000