syzkaller login: [ 26.100758] BUG: Bad rss-counter state mm:0000000062595ce5 type:MM_FILEPAGES val:33 [ 26.102619] BUG: Bad rss-counter state mm:0000000062595ce5 type:MM_ANONPAGES val:22 [ 26.264516] ================================================================== [ 26.265577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.266709] Read of size 8 at addr ffff8880101ff3f8 by task sshd/218 [ 26.267778] [ 26.268033] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.268887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.269883] Call Trace: [ 26.270209] [ 26.270492] dump_stack_lvl+0x91/0xf0 [ 26.270981] print_report+0xcc/0x620 [ 26.271486] ? __virt_addr_valid+0x102/0x340 [ 26.272032] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.272648] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.273256] kasan_report+0xbe/0xf0 [ 26.273732] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.274369] vma_interval_tree_remove+0xc75/0xec0 [ 26.274973] vma_prepare+0xc54/0x11a0 [ 26.275468] __split_vma+0x5af/0x950 [ 26.275941] ? __pfx___split_vma+0x10/0x10 [ 26.276482] ? find_held_lock+0x2c/0x110 [ 26.277016] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.277590] ? lock_is_held_type+0x9f/0x120 [ 26.278133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.278739] ? mtree_range_walk+0x632/0x900 [ 26.279314] ? mas_walk+0x5c7/0x7c0 [ 26.279786] do_vmi_munmap+0x1f1/0x2b0 [ 26.280277] mmap_region+0x1f9/0x2660 [ 26.280755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.281272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.281981] ? __pfx_lock_acquire+0x10/0x10 [ 26.282515] ? __pfx_mmap_region+0x10/0x10 [ 26.283056] ? security_mmap_addr+0x7d/0xa0 [ 26.283594] ? get_unmapped_area+0x1f5/0x3f0 [ 26.284141] do_mmap+0x854/0xf00 [ 26.284578] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.285077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.285640] ksys_mmap_pgoff+0x3af/0x500 [ 26.286144] do_syscall_64+0x3f/0x90 [ 26.286623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.287284] RIP: 0033:0x7f6ee24ded82 [ 26.287739] 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 [ 26.289884] RSP: 002b:00007fff09ebb7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.290786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ee24ded82 [ 26.291639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ee1918000 [ 26.292489] RBP: 00007f6ee1918000 R08: 0000000000000009 R09: 0000000000001000 [ 26.293346] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a33e406ec0 [ 26.294202] R13: 00007fff09ebb7c0 R14: 00007fff09ebb7f0 R15: 00007fff09ebbb50 [ 26.295072] [ 26.295370] [ 26.295585] Allocated by task 211: [ 26.296019] kasan_save_stack+0x22/0x50 [ 26.296532] kasan_set_track+0x25/0x30 [ 26.297027] __kasan_slab_alloc+0x59/0x70 [ 26.297548] kmem_cache_alloc+0x16b/0x370 [ 26.298062] vm_area_dup+0x20/0x160 [ 26.298516] __split_vma+0x170/0x950 [ 26.298994] split_vma+0xc6/0x110 [ 26.299446] mprotect_fixup+0x8d2/0xb30 [ 26.299947] do_mprotect_pkey+0x87e/0xd40 [ 26.300478] __x64_sys_mprotect+0x78/0xc0 [ 26.301006] do_syscall_64+0x3f/0x90 [ 26.301480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.302126] [ 26.302342] Freed by task 211: [ 26.302733] kasan_save_stack+0x22/0x50 [ 26.303260] kasan_set_track+0x25/0x30 [ 26.303761] kasan_save_free_info+0x2b/0x50 [ 26.304293] __kasan_slab_free+0x10a/0x190 [ 26.304827] kmem_cache_free+0x10d/0x4d0 [ 26.305333] rcu_core+0x8c8/0x2860 [ 26.305779] __do_softirq+0x1b7/0x7d4 [ 26.306254] [ 26.306468] Last potentially related work creation: [ 26.307099] kasan_save_stack+0x22/0x50 [ 26.307604] __kasan_record_aux_stack+0x8e/0xa0 [ 26.308266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.308910] remove_vma+0x139/0x170 [ 26.309357] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.309910] do_vmi_munmap+0x1f1/0x2b0 [ 26.310393] __vm_munmap+0x138/0x3a0 [ 26.310857] __x64_sys_munmap+0x59/0x80 [ 26.311365] do_syscall_64+0x3f/0x90 [ 26.311842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.312480] [ 26.312694] The buggy address belongs to the object at ffff8880101ff3a0 [ 26.312694] which belongs to the cache vm_area_struct of size 168 [ 26.314171] The buggy address is located 88 bytes inside of [ 26.314171] freed 168-byte region [ffff8880101ff3a0, ffff8880101ff448) [ 26.315586] [ 26.315802] The buggy address belongs to the physical page: [ 26.316460] page:00000000c7bf665c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ff [ 26.317557] memcg:ffff888019f4cc01 [ 26.317988] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.318634] page_type: 0xffffffff() [ 26.319098] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.320012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f4cc01 [ 26.320918] page dumped because: kasan: bad access detected [ 26.321585] [ 26.321800] Memory state around the buggy address: [ 26.322384] ffff8880101ff280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 26.323249] ffff8880101ff300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 26.324121] >ffff8880101ff380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 26.324971] ^ [ 26.325815] ffff8880101ff400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 26.326672] ffff8880101ff480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.327540] ================================================================== [ 26.328543] Disabling lock debugging due to kernel taint [ 29.134129] BUG: Bad rss-counter state mm:00000000c1f6f865 type:MM_FILEPAGES val:33 [ 29.135287] BUG: Bad rss-counter state mm:00000000c1f6f865 type:MM_ANONPAGES val:22 [ 29.639416] BUG: Bad rss-counter state mm:00000000de789e57 type:MM_FILEPAGES val:33 [ 29.640391] BUG: Bad rss-counter state mm:00000000de789e57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15911' (ECDSA) to the list of known hosts. 2023/06/19 18:11:40 fuzzer started 2023/06/19 18:11:40 dialing manager at localhost:44161 2023/06/19 18:11:40 checking machine... 2023/06/19 18:11:40 checking revisions... [ 30.357333] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:11:40 testing simple program... [ 30.404855] cgroup: Unknown subsys name 'net' [ 30.465553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:11:38 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=00007ffccef186d8 CR3=000000000e668000 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=2030343a31313a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b87213 RBX=ffff88800dc39068 RCX=1ffff110012e5614 RDX=dffffc0000000000 RSI=ffff88800dc20450 RDI=ffff88800dc39098 RBP=ffff88800972b070 RSP=ffff88801462fc08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800dc20440 R13=0000000000000000 R14=ffff888019d92768 R15=ffff888019d92720 RIP=ffffffff818474fe RFL=00000046 [---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 00007fac04d96900 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=00007fac0534b650 CR3=000000000c9b6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000