[ 30.883279] BUG: Bad rss-counter state mm:000000009200f484 type:MM_FILEPAGES val:33 [ 30.883944] BUG: Bad rss-counter state mm:000000009200f484 type:MM_ANONPAGES val:22 [ 31.004654] ================================================================== [ 31.005361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.006089] Read of size 8 at addr ffff88800b8a4df0 by task sshd/219 [ 31.006681] [ 31.006852] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.007650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.008412] Call Trace: [ 31.008658] [ 31.008885] dump_stack_lvl+0x91/0xf0 [ 31.009268] print_report+0xcc/0x620 [ 31.009643] ? __virt_addr_valid+0x102/0x340 [ 31.010067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011027] kasan_report+0xbe/0xf0 [ 31.011411] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011894] vma_interval_tree_remove+0xc75/0xec0 [ 31.012352] vma_prepare+0xc54/0x11a0 [ 31.012708] __split_vma+0x5af/0x950 [ 31.013064] ? __pfx___split_vma+0x10/0x10 [ 31.013462] ? find_held_lock+0x2c/0x110 [ 31.013855] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.014275] ? lock_is_held_type+0x9f/0x120 [ 31.014678] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.015132] ? mtree_range_walk+0x632/0x900 [ 31.015551] ? mas_walk+0x5c7/0x7c0 [ 31.015911] do_vmi_munmap+0x1f1/0x2b0 [ 31.016279] mmap_region+0x1f9/0x2660 [ 31.016638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.017023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.017563] ? __pfx_lock_acquire+0x10/0x10 [ 31.017960] ? __pfx_mmap_region+0x10/0x10 [ 31.018360] ? security_mmap_addr+0x7d/0xa0 [ 31.018754] ? get_unmapped_area+0x1f5/0x3f0 [ 31.019159] do_mmap+0x854/0xf00 [ 31.019494] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.019865] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.020281] ksys_mmap_pgoff+0x3af/0x500 [ 31.020658] do_syscall_64+0x3f/0x90 [ 31.021021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.021507] RIP: 0033:0x7f69ba20ed82 [ 31.021855] 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 [ 31.023446] RSP: 002b:00007fff758af168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.024126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69ba20ed82 [ 31.024763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69b9648000 [ 31.025403] RBP: 00007f69b9648000 R08: 0000000000000009 R09: 0000000000001000 [ 31.026035] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a46c040ec0 [ 31.026667] R13: 00007fff758af180 R14: 00007fff758af1b0 R15: 00007fff758af510 [ 31.027307] [ 31.027527] [ 31.027684] Allocated by task 212: [ 31.028005] kasan_save_stack+0x22/0x50 [ 31.028380] kasan_set_track+0x25/0x30 [ 31.028748] __kasan_slab_alloc+0x59/0x70 [ 31.029147] kmem_cache_alloc+0x16b/0x370 [ 31.029535] vm_area_dup+0x20/0x160 [ 31.029870] __split_vma+0x170/0x950 [ 31.030215] split_vma+0xc6/0x110 [ 31.030539] mprotect_fixup+0x8d2/0xb30 [ 31.030917] do_mprotect_pkey+0x87e/0xd40 [ 31.031312] __x64_sys_mprotect+0x78/0xc0 [ 31.031703] do_syscall_64+0x3f/0x90 [ 31.032056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.032532] [ 31.032691] Freed by task 212: [ 31.032989] kasan_save_stack+0x22/0x50 [ 31.033366] kasan_set_track+0x25/0x30 [ 31.033730] kasan_save_free_info+0x2b/0x50 [ 31.034127] __kasan_slab_free+0x10a/0x190 [ 31.034525] kmem_cache_free+0x10d/0x4d0 [ 31.034905] rcu_core+0x8c8/0x2860 [ 31.035245] __do_softirq+0x1b7/0x7d4 [ 31.035601] [ 31.035761] Last potentially related work creation: [ 31.036198] kasan_save_stack+0x22/0x50 [ 31.036577] __kasan_record_aux_stack+0x8e/0xa0 [ 31.037012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037492] remove_vma+0x139/0x170 [ 31.037833] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038251] do_vmi_munmap+0x1f1/0x2b0 [ 31.038615] __vm_munmap+0x138/0x3a0 [ 31.038964] __x64_sys_munmap+0x59/0x80 [ 31.039338] do_syscall_64+0x3f/0x90 [ 31.039694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.040175] [ 31.040336] The buggy address belongs to the object at ffff88800b8a4d98 [ 31.040336] which belongs to the cache vm_area_struct of size 168 [ 31.041432] The buggy address is located 88 bytes inside of [ 31.041432] freed 168-byte region [ffff88800b8a4d98, ffff88800b8a4e40) [ 31.042485] [ 31.042647] The buggy address belongs to the physical page: [ 31.043145] page:0000000023856e7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8a4 [ 31.043975] memcg:ffff88800eb5a401 [ 31.044293] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.044821] page_type: 0xffffffff() [ 31.045165] raw: 0100000000000200 ffff88800879fc80 ffffea0000628840 dead000000000007 [ 31.045861] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb5a401 [ 31.046535] page dumped because: kasan: bad access detected [ 31.047028] [ 31.047192] Memory state around the buggy address: [ 31.047623] ffff88800b8a4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.048264] ffff88800b8a4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.048944] >ffff88800b8a4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.049588] ^ [ 31.050188] ffff88800b8a4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.050821] ffff88800b8a4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.051465] ================================================================== [ 31.052278] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.935307] BUG: Bad rss-counter state mm:000000000d657cbf type:MM_FILEPAGES val:33 [ 32.936586] BUG: Bad rss-counter state mm:000000000d657cbf type:MM_ANONPAGES val:22 [ 33.381108] BUG: Bad rss-counter state mm:00000000feea891c type:MM_FILEPAGES val:33 [ 33.382057] BUG: Bad rss-counter state mm:00000000feea891c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39822' (ECDSA) to the list of known hosts. 2023/06/19 21:23:41 fuzzer started 2023/06/19 21:23:42 dialing manager at localhost:44161 2023/06/19 21:23:42 checking machine... 2023/06/19 21:23:42 checking revisions... [ 34.104028] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:23:42 testing simple program... [ 34.148325] cgroup: Unknown subsys name 'net' [ 34.222918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:34 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=00007f963d40fe70 CR3=000000000e36e000 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=2031343a33323a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801c8ef9e0 RCX=ffffffff863b1c7e RDX=1ffff1100391df3c RSI=ffff88801c8eff18 RDI=ffff88801c8ef9e0 RBP=ffff88801c8eff18 RSP=ffff88801c8ef938 R8 =ffffffff863b1c82 R9 =ffff88801c8efa20 R10=0000000000038001 R11=000000000008a973 R12=0000000000000008 R13=ffff88801c8efa28 R14=ffff88801c8eff20 R15=ffff88801c8ef9e0 RIP=ffffffff81130416 RFL=00000292 [--S-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 00007fd8598f8900 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=00007fd859eaf618 CR3=0000000019ab2000 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