[ 23.786526] BUG: Bad rss-counter state mm:0000000071f7e59c type:MM_FILEPAGES val:33 [ 23.787721] BUG: Bad rss-counter state mm:0000000071f7e59c type:MM_ANONPAGES val:22 [ 23.948915] ================================================================== [ 23.950173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.951576] Read of size 8 at addr ffff88800de7dc20 by task sshd/218 [ 23.952465] [ 23.952703] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.953651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.954647] Call Trace: [ 23.954979] [ 23.955275] dump_stack_lvl+0x91/0xf0 [ 23.955783] print_report+0xcc/0x620 [ 23.956283] ? __virt_addr_valid+0x102/0x340 [ 23.956883] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.957573] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.958244] kasan_report+0xbe/0xf0 [ 23.958775] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.959470] vma_interval_tree_remove+0xc75/0xec0 [ 23.960119] vma_prepare+0xc54/0x11a0 [ 23.960635] __split_vma+0x5af/0x950 [ 23.961145] ? __pfx___split_vma+0x10/0x10 [ 23.961710] ? find_held_lock+0x2c/0x110 [ 23.962269] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.962865] ? lock_is_held_type+0x9f/0x120 [ 23.963453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.964103] ? mtree_range_walk+0x632/0x900 [ 23.964693] ? mas_walk+0x5c7/0x7c0 [ 23.965202] do_vmi_munmap+0x1f1/0x2b0 [ 23.965730] mmap_region+0x1f9/0x2660 [ 23.966381] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.966938] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.967711] ? __pfx_lock_acquire+0x10/0x10 [ 23.968282] ? __pfx_mmap_region+0x10/0x10 [ 23.968845] ? security_mmap_addr+0x7d/0xa0 [ 23.969436] ? get_unmapped_area+0x1f5/0x3f0 [ 23.970079] do_mmap+0x854/0xf00 [ 23.970667] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.971195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.971859] ksys_mmap_pgoff+0x3af/0x500 [ 23.972429] do_syscall_64+0x3f/0x90 [ 23.972975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.973672] RIP: 0033:0x7f43ec55cd82 [ 23.974161] 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 [ 23.976466] RSP: 002b:00007fff0730fdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.977440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f43ec55cd82 [ 23.978373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43eb996000 [ 23.979295] RBP: 00007f43eb996000 R08: 0000000000000009 R09: 0000000000001000 [ 23.980232] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb8a239ec0 [ 23.981156] R13: 00007fff0730fe10 R14: 00007fff0730fe40 R15: 00007fff073101a0 [ 23.982096] [ 23.982422] [ 23.982658] Allocated by task 211: [ 23.983120] kasan_save_stack+0x22/0x50 [ 23.983672] kasan_set_track+0x25/0x30 [ 23.984180] __kasan_slab_alloc+0x59/0x70 [ 23.984703] kmem_cache_alloc+0x16b/0x370 [ 23.985221] vm_area_dup+0x20/0x160 [ 23.985683] __split_vma+0x170/0x950 [ 23.986152] split_vma+0xc6/0x110 [ 23.986587] mprotect_fixup+0x8d2/0xb30 [ 23.987091] do_mprotect_pkey+0x87e/0xd40 [ 23.987626] __x64_sys_mprotect+0x78/0xc0 [ 23.988153] do_syscall_64+0x3f/0x90 [ 23.988647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.989287] [ 23.989509] Freed by task 211: [ 23.989901] kasan_save_stack+0x22/0x50 [ 23.990411] kasan_set_track+0x25/0x30 [ 23.990904] kasan_save_free_info+0x2b/0x50 [ 23.991502] __kasan_slab_free+0x10a/0x190 [ 23.992078] kmem_cache_free+0x10d/0x4d0 [ 23.992619] rcu_core+0x8c8/0x2860 [ 23.993091] __do_softirq+0x1b7/0x7d4 [ 23.993593] [ 23.993812] Last potentially related work creation: [ 23.994418] kasan_save_stack+0x22/0x50 [ 23.994979] __kasan_record_aux_stack+0x8e/0xa0 [ 23.995637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.996320] remove_vma+0x139/0x170 [ 23.996790] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.997373] do_vmi_munmap+0x1f1/0x2b0 [ 23.997869] __vm_munmap+0x138/0x3a0 [ 23.998360] __x64_sys_munmap+0x59/0x80 [ 23.998873] do_syscall_64+0x3f/0x90 [ 23.999375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.000067] [ 24.000291] Second to last potentially related work creation: [ 24.001001] kasan_save_stack+0x22/0x50 [ 24.001514] __kasan_record_aux_stack+0x8e/0xa0 [ 24.002102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.002763] remove_vma+0x139/0x170 [ 24.003224] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.003808] do_vmi_munmap+0x1f1/0x2b0 [ 24.004304] mmap_region+0x1f9/0x2660 [ 24.004781] do_mmap+0x854/0xf00 [ 24.005227] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.005722] ksys_mmap_pgoff+0x3af/0x500 [ 24.006235] do_syscall_64+0x3f/0x90 [ 24.006713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.007362] [ 24.007599] The buggy address belongs to the object at ffff88800de7dbc8 [ 24.007599] which belongs to the cache vm_area_struct of size 168 [ 24.009082] The buggy address is located 88 bytes inside of [ 24.009082] freed 168-byte region [ffff88800de7dbc8, ffff88800de7dc70) [ 24.010523] [ 24.010752] The buggy address belongs to the physical page: [ 24.011477] page:00000000f476bc24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde7d [ 24.012637] memcg:ffff88800e60fd01 [ 24.013091] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.013830] page_type: 0xffffffff() [ 24.014318] raw: 0100000000000200 ffff8880087a0c80 ffffea000037edc0 dead000000000003 [ 24.015293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e60fd01 [ 24.016274] page dumped because: kasan: bad access detected [ 24.016945] [ 24.017178] Memory state around the buggy address: [ 24.017809] ffff88800de7db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.018721] ffff88800de7db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.019667] >ffff88800de7dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.020569] ^ [ 24.021135] ffff88800de7dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.022061] ffff88800de7dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.022971] ================================================================== [ 24.024176] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.976905] BUG: Bad rss-counter state mm:00000000de362274 type:MM_FILEPAGES val:33 [ 25.977720] BUG: Bad rss-counter state mm:00000000de362274 type:MM_ANONPAGES val:22 [ 26.325971] BUG: Bad rss-counter state mm:000000006348654c type:MM_FILEPAGES val:33 [ 26.327299] BUG: Bad rss-counter state mm:000000006348654c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5763' (ECDSA) to the list of known hosts. 2023/06/21 10:48:26 fuzzer started 2023/06/21 10:48:26 dialing manager at localhost:36067 2023/06/21 10:48:26 checking machine... 2023/06/21 10:48:26 checking revisions... [ 27.037421] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:48:26 testing simple program... [ 27.081597] cgroup: Unknown subsys name 'net' [ 27.117617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:48:26 Registers: info registers vcpu 0 RAX=ffffffff864bce31 RBX=0000000000000001 RCX=ffffffff864bce2c RDX=0000000000000000 RSI=0000000000000001 RDI=ffffffff86055fb8 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864bcdf6 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130a6e 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 00007efcb094b900 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=00007efcafdadc60 CR3=000000000f64c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e499d247e7d6fa3500000000000ae988 XMM05=0c2d400aa522c1aa0000000000134020 XMM06=751b9502027dc0b90000000000132b48 XMM07=fb795ef6d65770560000000000121cf8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110011eca06 RSI=ffff88801c9cc500 RDI=ffffffff87f97640 RBP=ffff888008f65000 RSP=ffff888016bb7b08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888008f65698 R13=ffff88801c9cc500 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff838640f2 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 00007fe77f237900 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=00007fe77f7ee618 CR3=000000000f050000 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