[ 23.880244] BUG: Bad rss-counter state mm:00000000dac2aa29 type:MM_FILEPAGES val:33 [ 23.881260] BUG: Bad rss-counter state mm:00000000dac2aa29 type:MM_ANONPAGES val:22 [ 24.049508] ================================================================== [ 24.050581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.051770] Read of size 8 at addr ffff88800e151b38 by task sshd/219 [ 24.052902] [ 24.053136] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.054017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.055028] Call Trace: [ 24.055357] [ 24.055645] dump_stack_lvl+0x91/0xf0 [ 24.056171] print_report+0xcc/0x620 [ 24.056673] ? __virt_addr_valid+0x102/0x340 [ 24.057252] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.057876] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.058529] kasan_report+0xbe/0xf0 [ 24.059031] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.059683] vma_interval_tree_remove+0xc75/0xec0 [ 24.060421] vma_prepare+0xc54/0x11a0 [ 24.060922] __split_vma+0x5af/0x950 [ 24.061421] ? __pfx___split_vma+0x10/0x10 [ 24.061972] ? find_held_lock+0x2c/0x110 [ 24.062499] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.063104] ? lock_is_held_type+0x9f/0x120 [ 24.063650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.064309] ? mtree_range_walk+0x632/0x900 [ 24.064872] ? mas_walk+0x5c7/0x7c0 [ 24.065363] do_vmi_munmap+0x1f1/0x2b0 [ 24.065861] mmap_region+0x1f9/0x2660 [ 24.066375] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.066889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.067658] ? __pfx_lock_acquire+0x10/0x10 [ 24.068232] ? __pfx_mmap_region+0x10/0x10 [ 24.068768] ? security_mmap_addr+0x7d/0xa0 [ 24.069317] ? get_unmapped_area+0x1f5/0x3f0 [ 24.069886] do_mmap+0x854/0xf00 [ 24.070339] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.070850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.071450] ksys_mmap_pgoff+0x3af/0x500 [ 24.071979] do_syscall_64+0x3f/0x90 [ 24.072477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.073158] RIP: 0033:0x7fbd8883dd82 [ 24.073623] 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 [ 24.075812] RSP: 002b:00007ffd7e996ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.076777] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd8883dd82 [ 24.077645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd87c77000 [ 24.078530] RBP: 00007fbd87c77000 R08: 0000000000000009 R09: 0000000000001000 [ 24.079400] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585466b1ec0 [ 24.080303] R13: 00007ffd7e997010 R14: 00007ffd7e997040 R15: 00007ffd7e9973a0 [ 24.081184] [ 24.081480] [ 24.081702] Allocated by task 212: [ 24.082152] kasan_save_stack+0x22/0x50 [ 24.082661] kasan_set_track+0x25/0x30 [ 24.083183] __kasan_slab_alloc+0x59/0x70 [ 24.083709] kmem_cache_alloc+0x16b/0x370 [ 24.084276] vm_area_dup+0x20/0x160 [ 24.084730] __split_vma+0x170/0x950 [ 24.085226] split_vma+0xc6/0x110 [ 24.085669] mprotect_fixup+0x8d2/0xb30 [ 24.086196] do_mprotect_pkey+0x87e/0xd40 [ 24.086726] __x64_sys_mprotect+0x78/0xc0 [ 24.087273] do_syscall_64+0x3f/0x90 [ 24.087756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.088431] [ 24.088651] Freed by task 212: [ 24.089076] kasan_save_stack+0x22/0x50 [ 24.089591] kasan_set_track+0x25/0x30 [ 24.090112] kasan_save_free_info+0x2b/0x50 [ 24.090650] __kasan_slab_free+0x10a/0x190 [ 24.091220] kmem_cache_free+0x10d/0x4d0 [ 24.091731] rcu_core+0x8c8/0x2860 [ 24.092230] __do_softirq+0x1b7/0x7d4 [ 24.092717] [ 24.092943] Last potentially related work creation: [ 24.093542] kasan_save_stack+0x22/0x50 [ 24.094086] __kasan_record_aux_stack+0x8e/0xa0 [ 24.094662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.095337] remove_vma+0x139/0x170 [ 24.095805] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.096396] do_vmi_munmap+0x1f1/0x2b0 [ 24.096895] __vm_munmap+0x138/0x3a0 [ 24.097378] __x64_sys_munmap+0x59/0x80 [ 24.097880] do_syscall_64+0x3f/0x90 [ 24.098378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.099057] [ 24.099274] Second to last potentially related work creation: [ 24.099970] kasan_save_stack+0x22/0x50 [ 24.100526] __kasan_record_aux_stack+0x8e/0xa0 [ 24.101127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.101786] remove_vma+0x139/0x170 [ 24.102254] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.102821] do_vmi_munmap+0x1f1/0x2b0 [ 24.103349] __vm_munmap+0x138/0x3a0 [ 24.103828] __x64_sys_munmap+0x59/0x80 [ 24.104353] do_syscall_64+0x3f/0x90 [ 24.104834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.105494] [ 24.105711] The buggy address belongs to the object at ffff88800e151ae0 [ 24.105711] which belongs to the cache vm_area_struct of size 168 [ 24.107239] The buggy address is located 88 bytes inside of [ 24.107239] freed 168-byte region [ffff88800e151ae0, ffff88800e151b88) [ 24.108681] [ 24.108918] The buggy address belongs to the physical page: [ 24.109638] page:0000000050a1f4af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe151 [ 24.110801] memcg:ffff88800d940501 [ 24.111266] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.112016] page_type: 0xffffffff() [ 24.112514] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.113494] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d940501 [ 24.114460] page dumped because: kasan: bad access detected [ 24.115167] [ 24.115388] Memory state around the buggy address: [ 24.116002] ffff88800e151a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.116914] ffff88800e151a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.117800] >ffff88800e151b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.118673] ^ [ 24.119334] ffff88800e151b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.120236] ffff88800e151c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.121135] ================================================================== [ 24.122163] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.847942] BUG: Bad rss-counter state mm:00000000a288605f type:MM_FILEPAGES val:33 [ 25.849172] BUG: Bad rss-counter state mm:00000000a288605f type:MM_ANONPAGES val:22 [ 26.246069] BUG: Bad rss-counter state mm:00000000f4167a7a type:MM_FILEPAGES val:33 [ 26.247258] BUG: Bad rss-counter state mm:00000000f4167a7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22679' (ECDSA) to the list of known hosts. 2023/06/21 07:05:01 fuzzer started 2023/06/21 07:05:01 dialing manager at localhost:36067 2023/06/21 07:05:01 checking machine... 2023/06/21 07:05:01 checking revisions... [ 26.994845] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:05:01 testing simple program... [ 27.038865] cgroup: Unknown subsys name 'net' [ 27.084858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:05:00 Registers: info registers vcpu 0 RAX=ffff88801a370500 RBX=ffff88801a370d00 RCX=0000000000019200 RDX=00000000000191c0 RSI=ffff88801a370d00 RDI=ffff888008441a00 RBP=ffff888018157a28 RSP=ffff888018157a18 R8 =00000000000191c0 R9 =ffffffff8181032f R10=ffffea000068dc00 R11=ffff88801a370500 R12=000000000003cfa0 R13=ffff888018157a78 R14=ffff888008441a00 R15=ffff88801a370d00 RIP=ffffffff8180b1c2 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 00007fb778798900 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=00007ffe9e1a1000 CR3=000000000f0da000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f194ca1b0a0 CR3=000000000d85e000 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=cf683b51bab538b8424859039ae7dc6a XMM02=000000000011d6d8ec2efd57dc4c00df XMM03=0000000000121380dd3a0fdba16b77ee XMM04=4c0f8421f3f97dc900000000000ae988 XMM05=dfcdbad4f1609c370000000000131f00 XMM06=442c8d8bb07288a600000000001310d8 XMM07=e042d86d42eb936e0000000000121600 XMM08=dd3a0fdba16b77ee000000000011d738 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000