[ 23.825770] BUG: Bad rss-counter state mm:00000000acfa3bf1 type:MM_FILEPAGES val:33 [ 23.826940] BUG: Bad rss-counter state mm:00000000acfa3bf1 type:MM_ANONPAGES val:22 [ 23.987249] ================================================================== [ 23.988337] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.989463] Read of size 8 at addr ffff88800e7643f8 by task sshd/219 [ 23.990343] [ 23.990567] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.991435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.992421] Call Trace: [ 23.992739] [ 23.993025] dump_stack_lvl+0x91/0xf0 [ 23.993528] print_report+0xcc/0x620 [ 23.994022] ? __virt_addr_valid+0x102/0x340 [ 23.994577] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.995201] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.995824] kasan_report+0xbe/0xf0 [ 23.996302] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.996934] vma_interval_tree_remove+0xc75/0xec0 [ 23.997538] vma_prepare+0xc54/0x11a0 [ 23.998039] __split_vma+0x5af/0x950 [ 23.998516] ? __pfx___split_vma+0x10/0x10 [ 23.999042] ? find_held_lock+0x2c/0x110 [ 23.999566] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.000130] ? lock_is_held_type+0x9f/0x120 [ 24.000667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.001271] ? mtree_range_walk+0x632/0x900 [ 24.001822] ? mas_walk+0x5c7/0x7c0 [ 24.002303] do_vmi_munmap+0x1f1/0x2b0 [ 24.002805] mmap_region+0x1f9/0x2660 [ 24.003287] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.003804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.004520] ? __pfx_lock_acquire+0x10/0x10 [ 24.005051] ? __pfx_mmap_region+0x10/0x10 [ 24.005582] ? security_mmap_addr+0x7d/0xa0 [ 24.006124] ? get_unmapped_area+0x1f5/0x3f0 [ 24.006674] do_mmap+0x854/0xf00 [ 24.007113] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.007617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.008178] ksys_mmap_pgoff+0x3af/0x500 [ 24.008688] do_syscall_64+0x3f/0x90 [ 24.009169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.009821] RIP: 0033:0x7feeace97d82 [ 24.010306] 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 [ 24.012432] RSP: 002b:00007ffecad41118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.013334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feeace97d82 [ 24.014206] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feeac2d1000 [ 24.015053] RBP: 00007feeac2d1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.015899] R10: 0000000000000812 R11: 0000000000000206 R12: 000055744b9d9f70 [ 24.016744] R13: 00007ffecad41130 R14: 00007ffecad41160 R15: 00007ffecad414c0 [ 24.017611] [ 24.017911] [ 24.018129] Allocated by task 212: [ 24.018561] kasan_save_stack+0x22/0x50 [ 24.019061] kasan_set_track+0x25/0x30 [ 24.019563] __kasan_slab_alloc+0x59/0x70 [ 24.020084] kmem_cache_alloc+0x16b/0x370 [ 24.020597] vm_area_dup+0x20/0x160 [ 24.021051] __split_vma+0x170/0x950 [ 24.021514] split_vma+0xc6/0x110 [ 24.021974] mprotect_fixup+0x8d2/0xb30 [ 24.022475] do_mprotect_pkey+0x87e/0xd40 [ 24.022997] __x64_sys_mprotect+0x78/0xc0 [ 24.023515] do_syscall_64+0x3f/0x90 [ 24.023992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.024634] [ 24.024848] Freed by task 212: [ 24.025239] kasan_save_stack+0x22/0x50 [ 24.025744] kasan_set_track+0x25/0x30 [ 24.026252] kasan_save_free_info+0x2b/0x50 [ 24.026787] __kasan_slab_free+0x10a/0x190 [ 24.027320] kmem_cache_free+0x10d/0x4d0 [ 24.027833] rcu_core+0x8c8/0x2860 [ 24.028276] __do_softirq+0x1b7/0x7d4 [ 24.028753] [ 24.028969] Last potentially related work creation: [ 24.029554] kasan_save_stack+0x22/0x50 [ 24.030076] __kasan_record_aux_stack+0x8e/0xa0 [ 24.030649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.031290] remove_vma+0x139/0x170 [ 24.031741] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.032309] do_vmi_munmap+0x1f1/0x2b0 [ 24.032793] __vm_munmap+0x138/0x3a0 [ 24.033262] __x64_sys_munmap+0x59/0x80 [ 24.033756] do_syscall_64+0x3f/0x90 [ 24.034238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.034885] [ 24.035098] The buggy address belongs to the object at ffff88800e7643a0 [ 24.035098] which belongs to the cache vm_area_struct of size 168 [ 24.036558] The buggy address is located 88 bytes inside of [ 24.036558] freed 168-byte region [ffff88800e7643a0, ffff88800e764448) [ 24.037975] [ 24.038194] The buggy address belongs to the physical page: [ 24.038850] page:0000000093b2cef5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe764 [ 24.039926] memcg:ffff88800c5d1401 [ 24.040350] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.041049] page_type: 0xffffffff() [ 24.041496] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.042425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5d1401 [ 24.043327] page dumped because: kasan: bad access detected [ 24.043994] [ 24.044211] Memory state around the buggy address: [ 24.044797] ffff88800e764280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.045645] ffff88800e764300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.046516] >ffff88800e764380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.047365] ^ [ 24.048205] ffff88800e764400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.049054] ffff88800e764480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.049914] ================================================================== [ 24.050886] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.240290] BUG: Bad rss-counter state mm:0000000071f78cd6 type:MM_FILEPAGES val:33 [ 26.241528] BUG: Bad rss-counter state mm:0000000071f78cd6 type:MM_ANONPAGES val:22 [ 26.643602] BUG: Bad rss-counter state mm:000000008ca57751 type:MM_FILEPAGES val:33 [ 26.644609] BUG: Bad rss-counter state mm:000000008ca57751 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16454' (ECDSA) to the list of known hosts. 2023/06/20 23:08:51 fuzzer started 2023/06/20 23:08:51 dialing manager at localhost:36067 2023/06/20 23:08:51 checking machine... 2023/06/20 23:08:51 checking revisions... [ 27.326792] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:08:51 testing simple program... [ 27.371823] cgroup: Unknown subsys name 'net' [ 27.436079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:08:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0a82cf4d70 CR3=000000000f05a000 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=2031353a38303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a38303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfcbe RBX=ffffffff85dfe5f4 RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff88806cf099c0 R8 =ffffffff8613971a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f8 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f268c169900 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=00007f268c7223ec CR3=000000000ea7c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000