[ 25.903501] BUG: Bad rss-counter state mm:000000006da328e8 type:MM_FILEPAGES val:33 [ 25.904287] BUG: Bad rss-counter state mm:000000006da328e8 type:MM_ANONPAGES val:22 [ 26.043915] ================================================================== [ 26.044646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.045379] Read of size 8 at addr ffff88800eb62058 by task sshd/220 [ 26.045973] [ 26.046144] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.046818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.047583] Call Trace: [ 26.047937] [ 26.048159] dump_stack_lvl+0x91/0xf0 [ 26.048555] print_report+0xcc/0x620 [ 26.048932] ? __virt_addr_valid+0x102/0x340 [ 26.049359] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.049846] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.050353] kasan_report+0xbe/0xf0 [ 26.050718] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.051207] vma_interval_tree_remove+0xc75/0xec0 [ 26.051680] vma_prepare+0xc54/0x11a0 [ 26.052058] __split_vma+0x5af/0x950 [ 26.052431] ? __pfx___split_vma+0x10/0x10 [ 26.052849] ? find_held_lock+0x2c/0x110 [ 26.053254] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.053695] ? lock_is_held_type+0x9f/0x120 [ 26.054119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.054598] ? mtree_range_walk+0x632/0x900 [ 26.055030] ? mas_walk+0x5c7/0x7c0 [ 26.055398] do_vmi_munmap+0x1f1/0x2b0 [ 26.055781] mmap_region+0x1f9/0x2660 [ 26.056159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.056581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.057143] ? __pfx_lock_acquire+0x10/0x10 [ 26.057559] ? __pfx_mmap_region+0x10/0x10 [ 26.057975] ? security_mmap_addr+0x7d/0xa0 [ 26.058395] ? get_unmapped_area+0x1f5/0x3f0 [ 26.058829] do_mmap+0x854/0xf00 [ 26.059171] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.059559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.059996] ksys_mmap_pgoff+0x3af/0x500 [ 26.060398] do_syscall_64+0x3f/0x90 [ 26.060788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.061296] RIP: 0033:0x7f5393f34d82 [ 26.061659] 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 [ 26.063349] RSP: 002b:00007ffdcb93d4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.064066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5393f34d82 [ 26.064739] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f539336e000 [ 26.065409] RBP: 00007f539336e000 R08: 0000000000000009 R09: 0000000000001000 [ 26.066070] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb94d5bec0 [ 26.066735] R13: 00007ffdcb93d500 R14: 00007ffdcb93d530 R15: 00007ffdcb93d890 [ 26.067415] [ 26.067643] [ 26.067808] Allocated by task 210: [ 26.068147] kasan_save_stack+0x22/0x50 [ 26.068557] kasan_set_track+0x25/0x30 [ 26.068943] __kasan_slab_alloc+0x59/0x70 [ 26.069352] kmem_cache_alloc+0x16b/0x370 [ 26.069756] vm_area_dup+0x20/0x160 [ 26.070115] __split_vma+0x170/0x950 [ 26.070479] split_vma+0xc6/0x110 [ 26.070820] mprotect_fixup+0x8d2/0xb30 [ 26.071212] do_mprotect_pkey+0x87e/0xd40 [ 26.071616] __x64_sys_mprotect+0x78/0xc0 [ 26.072022] do_syscall_64+0x3f/0x90 [ 26.072389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.072897] [ 26.073064] Freed by task 210: [ 26.073370] kasan_save_stack+0x22/0x50 [ 26.073763] kasan_set_track+0x25/0x30 [ 26.074147] kasan_save_free_info+0x2b/0x50 [ 26.074568] __kasan_slab_free+0x10a/0x190 [ 26.074982] kmem_cache_free+0x10d/0x4d0 [ 26.075378] rcu_core+0x8c8/0x2860 [ 26.075728] __do_softirq+0x1b7/0x7d4 [ 26.076101] [ 26.076269] Last potentially related work creation: [ 26.076732] kasan_save_stack+0x22/0x50 [ 26.077124] __kasan_record_aux_stack+0x8e/0xa0 [ 26.077571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.078073] remove_vma+0x139/0x170 [ 26.078426] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.078863] do_vmi_munmap+0x1f1/0x2b0 [ 26.079240] __vm_munmap+0x138/0x3a0 [ 26.079606] __x64_sys_munmap+0x59/0x80 [ 26.079995] do_syscall_64+0x3f/0x90 [ 26.080363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.080880] [ 26.081046] The buggy address belongs to the object at ffff88800eb62000 [ 26.081046] which belongs to the cache vm_area_struct of size 168 [ 26.082200] The buggy address is located 88 bytes inside of [ 26.082200] freed 168-byte region [ffff88800eb62000, ffff88800eb620a8) [ 26.083298] [ 26.083470] The buggy address belongs to the physical page: [ 26.083983] page:00000000a490d837 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb62 [ 26.084842] memcg:ffff88800d251601 [ 26.085174] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.085677] page_type: 0xffffffff() [ 26.086027] raw: 0100000000000200 ffff88800879fc80 ffffea0000261e80 dead000000000006 [ 26.086751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d251601 [ 26.087455] page dumped because: kasan: bad access detected [ 26.087966] [ 26.088131] Memory state around the buggy address: [ 26.088594] ffff88800eb61f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 26.089254] ffff88800eb61f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.089917] >ffff88800eb62000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.090573] ^ [ 26.091127] ffff88800eb62080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 26.091788] ffff88800eb62100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.092440] ================================================================== [ 26.093264] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.807519] BUG: Bad rss-counter state mm:0000000032fbe08d type:MM_FILEPAGES val:33 [ 27.808508] BUG: Bad rss-counter state mm:0000000032fbe08d type:MM_ANONPAGES val:22 [ 28.274720] BUG: Bad rss-counter state mm:00000000a67e38a7 type:MM_FILEPAGES val:33 [ 28.275713] BUG: Bad rss-counter state mm:00000000a67e38a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5441' (ECDSA) to the list of known hosts. 2023/06/19 12:45:04 fuzzer started 2023/06/19 12:45:05 dialing manager at localhost:44161 2023/06/19 12:45:05 checking machine... 2023/06/19 12:45:05 checking revisions... [ 29.013022] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:45:05 testing simple program... [ 29.067877] cgroup: Unknown subsys name 'net' [ 29.121148] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:02 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000000b2a40 RCX=00007fff04d87260 RDX=00007fff04d87148 RSI=00007fff04d87148 RDI=00005584d7198330 RBP=00007fff04d871c8 RSP=00007fff04d87140 R8 =0000000000000288 R9 =00000000000b2a40 R10=0000000000000002 R11=00007f34a155b548 R12=00007f34a14d8a40 R13=00005584d7197400 R14=0000000000000006 R15=00007fff04d87150 RIP=00007f34a2bbe475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f34a203b900 00000000 00000000 GS =0000 0000000000000000 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=00007f34a1438198 CR3=000000000ffec000 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=00000000001104f02fccd54c36d8a3f3 XMM01=85392367cbb8c3a5a24d5cd8304aa4f6 XMM02=000000000011da58eff9b2d0a8fce9cb XMM03=000000000011db282c67c8bc2e329bc3 XMM04=3a6b33cddfad33f500000000000ae988 XMM05=56ae8daac73050760000000000135420 XMM06=4fda316b135da52b0000000000133ea0 XMM07=fb795ef6d65770560000000000123a08 XMM08=2c67c8bc2e329bc3000000000011dac8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888016b361d0 RCX=ffffffff812e00e5 RDX=ffffed1002d66c3b RSI=0000000000000004 RDI=ffff88801ce077b0 RBP=1ffff110039c0ef2 RSP=ffff88801ce07780 R8 =0000000000000001 R9 =ffffed1002d66c3a R10=ffff888016b361d3 R11=00000000000b6996 R12=ffff888016b361d8 R13=ffff888016b361e0 R14=0000000000000024 R15=ffff888016b36504 RIP=ffffffff8180fd58 RFL=00000046 [---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 00007f3ef5bb0900 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=00007ffe61f1c000 CR3=000000001928e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000