[ 30.747017] BUG: Bad rss-counter state mm:000000003b91c341 type:MM_FILEPAGES val:33 [ 30.747712] BUG: Bad rss-counter state mm:000000003b91c341 type:MM_ANONPAGES val:22 [ 30.914224] ================================================================== [ 30.915188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.916192] Read of size 8 at addr ffff88801a2e3968 by task sshd/218 [ 30.917097] [ 30.917327] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.918234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.919280] Call Trace: [ 30.919618] [ 30.919929] dump_stack_lvl+0x91/0xf0 [ 30.920450] print_report+0xcc/0x620 [ 30.920958] ? __virt_addr_valid+0x102/0x340 [ 30.921557] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.922248] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.922942] kasan_report+0xbe/0xf0 [ 30.923474] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924169] vma_interval_tree_remove+0xc75/0xec0 [ 30.924834] vma_prepare+0xc54/0x11a0 [ 30.925362] __split_vma+0x5af/0x950 [ 30.925892] ? __pfx___split_vma+0x10/0x10 [ 30.926473] ? find_held_lock+0x2c/0x110 [ 30.927051] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.927694] ? lock_is_held_type+0x9f/0x120 [ 30.928294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.928963] ? mtree_range_walk+0x632/0x900 [ 30.929577] ? mas_walk+0x5c7/0x7c0 [ 30.930104] do_vmi_munmap+0x1f1/0x2b0 [ 30.930642] mmap_region+0x1f9/0x2660 [ 30.931176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.931750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.932538] ? __pfx_lock_acquire+0x10/0x10 [ 30.933133] ? __pfx_mmap_region+0x10/0x10 [ 30.933720] ? security_mmap_addr+0x7d/0xa0 [ 30.934313] ? get_unmapped_area+0x1f5/0x3f0 [ 30.934923] do_mmap+0x854/0xf00 [ 30.935410] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.935977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.936595] ksys_mmap_pgoff+0x3af/0x500 [ 30.937156] do_syscall_64+0x3f/0x90 [ 30.937686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938413] RIP: 0033:0x7f5646c27d82 [ 30.938914] 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 [ 30.941270] RSP: 002b:00007ffd325c17a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.942268] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5646c27d82 [ 30.943203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5646061000 [ 30.944161] RBP: 00007f5646061000 R08: 0000000000000009 R09: 0000000000001000 [ 30.945101] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d3bec1ec0 [ 30.946048] R13: 00007ffd325c17c0 R14: 00007ffd325c17f0 R15: 00007ffd325c1b50 [ 30.946997] [ 30.947319] [ 30.947556] Allocated by task 210: [ 30.948044] kasan_save_stack+0x22/0x50 [ 30.948607] kasan_set_track+0x25/0x30 [ 30.949151] __kasan_slab_alloc+0x59/0x70 [ 30.949736] kmem_cache_alloc+0x16b/0x370 [ 30.950311] vm_area_dup+0x20/0x160 [ 30.950811] __split_vma+0x170/0x950 [ 30.951334] split_vma+0xc6/0x110 [ 30.951822] mprotect_fixup+0x8d2/0xb30 [ 30.952381] do_mprotect_pkey+0x87e/0xd40 [ 30.952954] __x64_sys_mprotect+0x78/0xc0 [ 30.953536] do_syscall_64+0x3f/0x90 [ 30.954060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954777] [ 30.955016] Freed by task 19: [ 30.955442] kasan_save_stack+0x22/0x50 [ 30.956015] kasan_set_track+0x25/0x30 [ 30.956567] kasan_save_free_info+0x2b/0x50 [ 30.957164] __kasan_slab_free+0x10a/0x190 [ 30.957752] kmem_cache_free+0x10d/0x4d0 [ 30.958312] rcu_core+0x8c8/0x2860 [ 30.958808] __do_softirq+0x1b7/0x7d4 [ 30.959344] [ 30.959581] Last potentially related work creation: [ 30.960238] kasan_save_stack+0x22/0x50 [ 30.960797] __kasan_record_aux_stack+0x8e/0xa0 [ 30.961432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.962143] remove_vma+0x139/0x170 [ 30.962640] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.963250] do_vmi_munmap+0x1f1/0x2b0 [ 30.963798] __vm_munmap+0x138/0x3a0 [ 30.964315] __x64_sys_munmap+0x59/0x80 [ 30.964865] do_syscall_64+0x3f/0x90 [ 30.965392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966107] [ 30.966341] The buggy address belongs to the object at ffff88801a2e3910 [ 30.966341] which belongs to the cache vm_area_struct of size 168 [ 30.967990] The buggy address is located 88 bytes inside of [ 30.967990] freed 168-byte region [ffff88801a2e3910, ffff88801a2e39b8) [ 30.969543] [ 30.969783] The buggy address belongs to the physical page: [ 30.970515] page:000000007db91bce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2e3 [ 30.971728] memcg:ffff88801a2b2901 [ 30.972198] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.972908] page_type: 0xffffffff() [ 30.973414] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.974442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2b2901 [ 30.975448] page dumped because: kasan: bad access detected [ 30.976199] [ 30.976439] Memory state around the buggy address: [ 30.977088] ffff88801a2e3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.978044] ffff88801a2e3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.978991] >ffff88801a2e3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.979943] ^ [ 30.980817] ffff88801a2e3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.981776] ffff88801a2e3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.982730] ================================================================== [ 30.983897] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.934449] BUG: Bad rss-counter state mm:0000000076d50883 type:MM_FILEPAGES val:33 [ 32.935682] BUG: Bad rss-counter state mm:0000000076d50883 type:MM_ANONPAGES val:22 [ 33.471480] BUG: Bad rss-counter state mm:00000000886b4016 type:MM_FILEPAGES val:33 [ 33.472670] BUG: Bad rss-counter state mm:00000000886b4016 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17789' (ECDSA) to the list of known hosts. 2023/06/21 08:52:31 fuzzer started 2023/06/21 08:52:31 dialing manager at localhost:36067 2023/06/21 08:52:31 checking machine... 2023/06/21 08:52:31 checking revisions... [ 34.126106] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:52:31 testing simple program... [ 34.182014] cgroup: Unknown subsys name 'net' [ 34.225685] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:52:31 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=00007f25bce3a1d0 CR3=000000000ebf2000 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=00000000000000000000000000000000 XMM01=98eecc7599d2d29d664566d03c8cdcf7 XMM02=000000000011ade0eff9b2d0a8fce9cb XMM03=000000000011aeb02c67c8bc2e329bc3 XMM04=bb71f1c57c5738f900000000000ae988 XMM05=799da258206720a80000000000132b80 XMM06=bdf2e299e47b49d50000000000131600 XMM07=fb795ef6d65770560000000000120f68 XMM08=2c67c8bc2e329bc3000000000011ae50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e3a3720 RCX=ffff88800844f780 RDX=ffffea000038e8c0 RSI=ffff88800cb6a5f0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888019fc7c98 R8 =ffff88800e3a3390 R9 =0000000000000000 R10=ffffea000032da80 R11=00000000000d0007 R12=dffffc0000000000 R13=ffff888019fc7cd8 R14=ffff88800844f780 R15=ffff88800cb6a5f0 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f1da3e32900 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=00007f1da43ea0b0 CR3=000000000da4e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000