[ 34.831518] BUG: Bad rss-counter state mm:00000000eb38c477 type:MM_FILEPAGES val:33 [ 34.832868] BUG: Bad rss-counter state mm:00000000eb38c477 type:MM_ANONPAGES val:22 [ 34.980222] ================================================================== [ 34.981093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.982016] Read of size 8 at addr ffff88800e4643f8 by task sshd/219 [ 34.982762] [ 34.983082] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.983937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.984884] Call Trace: [ 34.985215] [ 34.985493] dump_stack_lvl+0x91/0xf0 [ 34.985992] print_report+0xcc/0x620 [ 34.986462] ? __virt_addr_valid+0x102/0x340 [ 34.986994] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.987597] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.988204] kasan_report+0xbe/0xf0 [ 34.988668] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.989272] vma_interval_tree_remove+0xc75/0xec0 [ 34.989870] vma_prepare+0xc54/0x11a0 [ 34.990333] __split_vma+0x5af/0x950 [ 34.990802] ? __pfx___split_vma+0x10/0x10 [ 34.991315] ? find_held_lock+0x2c/0x110 [ 34.991824] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.992376] ? lock_is_held_type+0x9f/0x120 [ 34.992897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.993498] ? mtree_range_walk+0x632/0x900 [ 34.994052] ? mas_walk+0x5c7/0x7c0 [ 34.994517] do_vmi_munmap+0x1f1/0x2b0 [ 34.994999] mmap_region+0x1f9/0x2660 [ 34.995471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.995973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.996668] ? __pfx_lock_acquire+0x10/0x10 [ 34.997189] ? __pfx_mmap_region+0x10/0x10 [ 34.997706] ? security_mmap_addr+0x7d/0xa0 [ 34.998235] ? get_unmapped_area+0x1f5/0x3f0 [ 34.998771] do_mmap+0x854/0xf00 [ 34.999204] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.999687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.000236] ksys_mmap_pgoff+0x3af/0x500 [ 35.000732] do_syscall_64+0x3f/0x90 [ 35.001201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.001834] RIP: 0033:0x7f55534a6d82 [ 35.002290] 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 [ 35.004349] RSP: 002b:00007ffdfb722298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.005228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55534a6d82 [ 35.006074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55528e0000 [ 35.006897] RBP: 00007f55528e0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.007723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9604e3ec0 [ 35.008561] R13: 00007ffdfb7222b0 R14: 00007ffdfb7222e0 R15: 00007ffdfb722640 [ 35.009406] [ 35.009694] [ 35.009920] Allocated by task 212: [ 35.010351] kasan_save_stack+0x22/0x50 [ 35.010846] kasan_set_track+0x25/0x30 [ 35.011328] __kasan_slab_alloc+0x59/0x70 [ 35.011844] kmem_cache_alloc+0x16b/0x370 [ 35.012348] vm_area_dup+0x20/0x160 [ 35.012799] __split_vma+0x170/0x950 [ 35.013256] split_vma+0xc6/0x110 [ 35.013690] mprotect_fixup+0x8d2/0xb30 [ 35.014191] do_mprotect_pkey+0x87e/0xd40 [ 35.014706] __x64_sys_mprotect+0x78/0xc0 [ 35.015221] do_syscall_64+0x3f/0x90 [ 35.015693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.016328] [ 35.016544] Freed by task 212: [ 35.016933] kasan_save_stack+0x22/0x50 [ 35.017432] kasan_set_track+0x25/0x30 [ 35.017934] kasan_save_free_info+0x2b/0x50 [ 35.018458] __kasan_slab_free+0x10a/0x190 [ 35.018981] kmem_cache_free+0x10d/0x4d0 [ 35.019480] rcu_core+0x8c8/0x2860 [ 35.019916] __do_softirq+0x1b7/0x7d4 [ 35.020388] [ 35.020602] Last potentially related work creation: [ 35.021177] kasan_save_stack+0x22/0x50 [ 35.021669] __kasan_record_aux_stack+0x8e/0xa0 [ 35.022246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.022878] remove_vma+0x139/0x170 [ 35.023320] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.023873] do_vmi_munmap+0x1f1/0x2b0 [ 35.024352] __vm_munmap+0x138/0x3a0 [ 35.024817] __x64_sys_munmap+0x59/0x80 [ 35.025308] do_syscall_64+0x3f/0x90 [ 35.025784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.026417] [ 35.026630] The buggy address belongs to the object at ffff88800e4643a0 [ 35.026630] which belongs to the cache vm_area_struct of size 168 [ 35.028079] The buggy address is located 88 bytes inside of [ 35.028079] freed 168-byte region [ffff88800e4643a0, ffff88800e464448) [ 35.029439] [ 35.029652] The buggy address belongs to the physical page: [ 35.030310] page:000000005440f472 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe464 [ 35.031381] memcg:ffff88800cbd3501 [ 35.031802] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.032435] page_type: 0xffffffff() [ 35.032877] raw: 0100000000000200 ffff88800879fc80 ffffea000037f600 dead000000000008 [ 35.033797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbd3501 [ 35.034692] page dumped because: kasan: bad access detected [ 35.035341] [ 35.035552] Memory state around the buggy address: [ 35.036126] ffff88800e464280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.036966] ffff88800e464300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.037983] >ffff88800e464380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.038850] ^ [ 35.039711] ffff88800e464400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.040601] ffff88800e464480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.041485] ================================================================== [ 35.042494] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.053225] BUG: Bad rss-counter state mm:00000000e2498f59 type:MM_FILEPAGES val:33 [ 37.054437] BUG: Bad rss-counter state mm:00000000e2498f59 type:MM_ANONPAGES val:22 [ 37.585002] BUG: Bad rss-counter state mm:00000000b405c19c type:MM_FILEPAGES val:33 [ 37.586236] BUG: Bad rss-counter state mm:00000000b405c19c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44799' (ECDSA) to the list of known hosts. 2023/06/19 17:46:16 fuzzer started 2023/06/19 17:46:16 dialing manager at localhost:44161 2023/06/19 17:46:16 checking machine... 2023/06/19 17:46:16 checking revisions... [ 38.260933] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:46:16 testing simple program... [ 38.306330] cgroup: Unknown subsys name 'net' [ 38.351125] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:05 Registers: info registers vcpu 0 RAX=1ffff1100284236d RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888014211b40 RSI=ffffffff811fc450 RDI=ffffffff81390a68 RBP=ffffed100284236d RSP=ffff8880141dfe50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880142123b8 R13=ffff888014211b40 R14=1ffff11002842477 R15=ffff88800de09900 RIP=ffffffff814c07e4 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 00007fa994633900 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=00007fa993ac1d00 CR3=000000000c6b4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2c213f789e19daf500000000000ae988 XMM05=cf60c4a0e33559ce0000000000134b28 XMM06=806171799158d96700000000001332d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=dffffc0000000000 RSI=00000000000018dd RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff81130764 RFL=00000287 [--S--PC] 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 00007fbff204a900 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=00007fbff2601618 CR3=000000001428a000 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