[ 40.803048] BUG: Bad rss-counter state mm:00000000e6f9905e type:MM_FILEPAGES val:33 [ 40.804324] BUG: Bad rss-counter state mm:00000000e6f9905e type:MM_ANONPAGES val:22 [ 40.844760] ================================================================== [ 40.845772] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.846783] Read of size 8 at addr ffff88800f0f9140 by task sshd/225 [ 40.847557] [ 40.847783] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.848648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.849628] Call Trace: [ 40.849951] [ 40.850238] dump_stack_lvl+0x91/0xf0 [ 40.850736] print_report+0xcc/0x620 [ 40.851227] ? __virt_addr_valid+0x102/0x340 [ 40.851807] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.852427] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.853045] kasan_report+0xbe/0xf0 [ 40.853528] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.854149] vma_interval_tree_remove+0xc75/0xec0 [ 40.854765] vma_prepare+0xc54/0x11a0 [ 40.855256] __split_vma+0x5af/0x950 [ 40.855737] ? __pfx___split_vma+0x10/0x10 [ 40.856280] ? find_held_lock+0x2c/0x110 [ 40.856812] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.857390] ? lock_is_held_type+0x9f/0x120 [ 40.857925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.858545] ? mtree_range_walk+0x632/0x900 [ 40.859098] ? mas_walk+0x5c7/0x7c0 [ 40.859576] do_vmi_munmap+0x1f1/0x2b0 [ 40.860100] mmap_region+0x1f9/0x2660 [ 40.860592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.861111] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.861834] ? __pfx_lock_acquire+0x10/0x10 [ 40.862370] ? __pfx_mmap_region+0x10/0x10 [ 40.862905] ? security_mmap_addr+0x7d/0xa0 [ 40.863434] ? get_unmapped_area+0x1f5/0x3f0 [ 40.863999] do_mmap+0x854/0xf00 [ 40.864445] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.864949] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.865515] ksys_mmap_pgoff+0x3af/0x500 [ 40.866025] do_syscall_64+0x3f/0x90 [ 40.866507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.867149] RIP: 0033:0x7f9f55e3bd82 [ 40.867615] 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 [ 40.869830] RSP: 002b:00007fffc3fd19a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.870760] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f55e3bd82 [ 40.871627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f55275000 [ 40.872507] RBP: 00007f9f55275000 R08: 0000000000000009 R09: 0000000000001000 [ 40.873355] R10: 0000000000000812 R11: 0000000000000206 R12: 000055721bb98f70 [ 40.874207] R13: 00007fffc3fd19c0 R14: 00007fffc3fd19f0 R15: 00007fffc3fd1d50 [ 40.875083] [ 40.875378] [ 40.875597] Allocated by task 215: [ 40.876032] kasan_save_stack+0x22/0x50 [ 40.876545] kasan_set_track+0x25/0x30 [ 40.877040] __kasan_slab_alloc+0x59/0x70 [ 40.877565] kmem_cache_alloc+0x16b/0x370 [ 40.878090] vm_area_dup+0x20/0x160 [ 40.878553] __split_vma+0x170/0x950 [ 40.879029] split_vma+0xc6/0x110 [ 40.879477] mprotect_fixup+0x8d2/0xb30 [ 40.880009] do_mprotect_pkey+0x87e/0xd40 [ 40.880533] __x64_sys_mprotect+0x78/0xc0 [ 40.881052] do_syscall_64+0x3f/0x90 [ 40.881535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.882180] [ 40.882395] Freed by task 215: [ 40.882793] kasan_save_stack+0x22/0x50 [ 40.883301] kasan_set_track+0x25/0x30 [ 40.883809] kasan_save_free_info+0x2b/0x50 [ 40.884340] __kasan_slab_free+0x10a/0x190 [ 40.884876] kmem_cache_free+0x10d/0x4d0 [ 40.885386] rcu_core+0x8c8/0x2860 [ 40.885830] __do_softirq+0x1b7/0x7d4 [ 40.886316] [ 40.886534] Last potentially related work creation: [ 40.887125] kasan_save_stack+0x22/0x50 [ 40.887629] __kasan_record_aux_stack+0x8e/0xa0 [ 40.888211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.888854] remove_vma+0x139/0x170 [ 40.889313] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.889871] do_vmi_munmap+0x1f1/0x2b0 [ 40.890362] __vm_munmap+0x138/0x3a0 [ 40.890833] __x64_sys_munmap+0x59/0x80 [ 40.891330] do_syscall_64+0x3f/0x90 [ 40.891822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.892465] [ 40.892680] The buggy address belongs to the object at ffff88800f0f90e8 [ 40.892680] which belongs to the cache vm_area_struct of size 168 [ 40.894150] The buggy address is located 88 bytes inside of [ 40.894150] freed 168-byte region [ffff88800f0f90e8, ffff88800f0f9190) [ 40.895560] [ 40.895786] The buggy address belongs to the physical page: [ 40.896446] page:000000000639aa0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0f9 [ 40.897524] memcg:ffff888016656f01 [ 40.897948] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.898615] page_type: 0xffffffff() [ 40.899069] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.900012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016656f01 [ 40.900919] page dumped because: kasan: bad access detected [ 40.901578] [ 40.901795] Memory state around the buggy address: [ 40.902376] ffff88800f0f9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.903232] ffff88800f0f9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.904100] >ffff88800f0f9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.904953] ^ [ 40.905598] ffff88800f0f9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.906456] ffff88800f0f9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.907310] ================================================================== [ 40.908437] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.358322] BUG: Bad rss-counter state mm:000000001df7f7e3 type:MM_FILEPAGES val:33 [ 43.359620] BUG: Bad rss-counter state mm:000000001df7f7e3 type:MM_ANONPAGES val:22 [ 43.783596] BUG: Bad rss-counter state mm:0000000000d4b857 type:MM_FILEPAGES val:33 [ 43.784696] BUG: Bad rss-counter state mm:0000000000d4b857 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7655' (ECDSA) to the list of known hosts. 2023/06/20 04:22:32 fuzzer started 2023/06/20 04:22:32 dialing manager at localhost:44161 2023/06/20 04:22:32 checking machine... 2023/06/20 04:22:32 checking revisions... [ 44.439075] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:22:32 testing simple program... [ 44.486851] cgroup: Unknown subsys name 'net' [ 44.564816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:22:22 Registers: info registers vcpu 0 RAX=1ffffffff0bc5261 RBX=ffffffff85e29308 RCX=ffffffff81afab9c RDX=0000000000000000 RSI=ffffffff8617a282 RDI=ffffffff85e292f8 RBP=ffffffff85e292f8 RSP=ffff88806ce099e0 R8 =ffffffff8617a282 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000002bfc9 R12=ffffffff85e29318 R13=ffffffff85e292f8 R14=ffffffff85e292f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f8fd7062700 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=00007f29facf5730 CR3=000000000e96e000 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=2031333a32323a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3433 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3433325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002d5f45f RBX=ffff888016afa2c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016afa2f8 RBP=ffff888016be1440 RSP=ffff888008e57cb8 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880174070b8 R14=ffffffff813782a8 R15=ffff8880174070b8 RIP=ffffffff81846362 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 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=00007f32b8b4c618 CR3=000000001beba000 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