[ 34.923841] BUG: Bad rss-counter state mm:000000004820c100 type:MM_FILEPAGES val:33 [ 34.925298] BUG: Bad rss-counter state mm:000000004820c100 type:MM_ANONPAGES val:22 [ 34.962955] ================================================================== [ 34.964010] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.965132] Read of size 8 at addr ffff88800e2c5b38 by task sshd/219 [ 34.966118] [ 34.966338] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.967316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.968478] Call Trace: [ 34.968803] [ 34.969100] dump_stack_lvl+0x91/0xf0 [ 34.969662] print_report+0xcc/0x620 [ 34.970248] ? __virt_addr_valid+0x102/0x340 [ 34.970861] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.971519] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.972149] kasan_report+0xbe/0xf0 [ 34.972789] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.973419] vma_interval_tree_remove+0xc75/0xec0 [ 34.974017] vma_prepare+0xc54/0x11a0 [ 34.974497] __split_vma+0x5af/0x950 [ 34.974962] ? __pfx___split_vma+0x10/0x10 [ 34.975495] ? find_held_lock+0x2c/0x110 [ 34.976013] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.976577] ? lock_is_held_type+0x9f/0x120 [ 34.977123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.977731] ? mtree_range_walk+0x632/0x900 [ 34.978278] ? mas_walk+0x5c7/0x7c0 [ 34.978752] do_vmi_munmap+0x1f1/0x2b0 [ 34.979251] mmap_region+0x1f9/0x2660 [ 34.979734] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.980246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.980978] ? __pfx_lock_acquire+0x10/0x10 [ 34.981511] ? __pfx_mmap_region+0x10/0x10 [ 34.982035] ? security_mmap_addr+0x7d/0xa0 [ 34.982562] ? get_unmapped_area+0x1f5/0x3f0 [ 34.983111] do_mmap+0x854/0xf00 [ 34.983548] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.984040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.984598] ksys_mmap_pgoff+0x3af/0x500 [ 34.985115] do_syscall_64+0x3f/0x90 [ 34.985594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.986247] RIP: 0033:0x7f564ad71d82 [ 34.986702] 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 [ 34.988833] RSP: 002b:00007ffc48ca8cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.989732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f564ad71d82 [ 34.990578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f564a1ab000 [ 34.991420] RBP: 00007f564a1ab000 R08: 0000000000000009 R09: 0000000000001000 [ 34.992254] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f9f29ef70 [ 34.993104] R13: 00007ffc48ca8cd0 R14: 00007ffc48ca8d00 R15: 00007ffc48ca9060 [ 34.993957] [ 34.994245] [ 34.994460] Allocated by task 212: [ 34.994883] kasan_save_stack+0x22/0x50 [ 34.995389] kasan_set_track+0x25/0x30 [ 34.995881] __kasan_slab_alloc+0x59/0x70 [ 34.996406] kmem_cache_alloc+0x16b/0x370 [ 34.996933] vm_area_dup+0x20/0x160 [ 34.997394] __split_vma+0x170/0x950 [ 34.997861] split_vma+0xc6/0x110 [ 34.998295] mprotect_fixup+0x8d2/0xb30 [ 34.998798] do_mprotect_pkey+0x87e/0xd40 [ 34.999314] __x64_sys_mprotect+0x78/0xc0 [ 34.999840] do_syscall_64+0x3f/0x90 [ 35.000316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.000972] [ 35.001188] Freed by task 203: [ 35.001581] kasan_save_stack+0x22/0x50 [ 35.002089] kasan_set_track+0x25/0x30 [ 35.002580] kasan_save_free_info+0x2b/0x50 [ 35.003119] __kasan_slab_free+0x10a/0x190 [ 35.003654] kmem_cache_free+0x10d/0x4d0 [ 35.004157] rcu_core+0x8c8/0x2860 [ 35.004600] __do_softirq+0x1b7/0x7d4 [ 35.005094] [ 35.005307] Last potentially related work creation: [ 35.005891] kasan_save_stack+0x22/0x50 [ 35.006393] __kasan_record_aux_stack+0x8e/0xa0 [ 35.006966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.007608] remove_vma+0x139/0x170 [ 35.008129] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.008688] do_vmi_munmap+0x1f1/0x2b0 [ 35.009178] __vm_munmap+0x138/0x3a0 [ 35.009653] __x64_sys_munmap+0x59/0x80 [ 35.010148] do_syscall_64+0x3f/0x90 [ 35.010618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.011253] [ 35.011474] Second to last potentially related work creation: [ 35.012154] kasan_save_stack+0x22/0x50 [ 35.012656] __kasan_record_aux_stack+0x8e/0xa0 [ 35.013246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.013890] remove_vma+0x139/0x170 [ 35.014345] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.014904] do_vmi_munmap+0x1f1/0x2b0 [ 35.015383] mmap_region+0x1f9/0x2660 [ 35.015856] do_mmap+0x854/0xf00 [ 35.016285] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.016785] ksys_mmap_pgoff+0x3af/0x500 [ 35.017278] do_syscall_64+0x3f/0x90 [ 35.017752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.018388] [ 35.018607] The buggy address belongs to the object at ffff88800e2c5ae0 [ 35.018607] which belongs to the cache vm_area_struct of size 168 [ 35.020065] The buggy address is located 88 bytes inside of [ 35.020065] freed 168-byte region [ffff88800e2c5ae0, ffff88800e2c5b88) [ 35.021472] [ 35.021688] The buggy address belongs to the physical page: [ 35.022345] page:000000003bc2bb27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c5 [ 35.023428] memcg:ffff88800e2f0d01 [ 35.023859] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.024494] page_type: 0xffffffff() [ 35.024955] raw: 0100000000000200 ffff88800879fc80 ffffea0000374380 dead000000000004 [ 35.025866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2f0d01 [ 35.026768] page dumped because: kasan: bad access detected [ 35.027431] [ 35.027643] Memory state around the buggy address: [ 35.028223] ffff88800e2c5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.029091] ffff88800e2c5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.029942] >ffff88800e2c5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.030793] ^ [ 35.031401] ffff88800e2c5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.032252] ffff88800e2c5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.033106] ================================================================== [ 35.034096] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.871168] BUG: Bad rss-counter state mm:00000000ae753ed5 type:MM_FILEPAGES val:33 [ 36.872033] BUG: Bad rss-counter state mm:00000000ae753ed5 type:MM_ANONPAGES val:22 [ 37.309023] BUG: Bad rss-counter state mm:0000000041a3b991 type:MM_FILEPAGES val:33 [ 37.309758] BUG: Bad rss-counter state mm:0000000041a3b991 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16234' (ECDSA) to the list of known hosts. 2023/06/19 22:06:22 fuzzer started 2023/06/19 22:06:22 dialing manager at localhost:44161 2023/06/19 22:06:22 checking machine... 2023/06/19 22:06:22 checking revisions... [ 38.025250] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:06:22 testing simple program... [ 38.073943] cgroup: Unknown subsys name 'net' [ 38.125106] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86054da8 RCX=ffffffff86605df8 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86054dac RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86054dac R13=ffffffff85d793d4 R14=ffffffff86054da8 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000256 [---ZAP-] 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 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=00007f68d4c6d990 CR3=0000000008ed4000 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=7dad713dd332d686c947cb7c0ab36c82 XMM02=2c67c8bc2e329bc3000000000011cf70 XMM03=fb795ef6d65770560000000000123930 XMM04=f92f895cb59491e800000000000ae988 XMM05=dfcdbad4f1609c370000000000134518 XMM06=af3b349f1398ac0300000000001336f0 XMM07=e042d86d42eb936e0000000000123bb0 XMM08=2ac95bfbf3248339000000000011cfd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dead000000000122 RBX=ffff888008ee0178 RCX=ffffffff812e00e5 RDX=1ffff110011dc02f RSI=ffffffff87b86f80 RDI=ffff888016a2cc30 RBP=ffff888016a2c260 RSP=ffff88800ff37d48 R8 =0000000000000001 R9 =ffffed1001fe6f97 R10=0000000000000003 R11=0000000000000001 R12=0000000000000287 R13=ffff888016a2cc28 R14=ffffffff81893972 R15=dffffc0000000000 RIP=ffffffff84513688 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 00007fb6d5974900 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=00007ffd91d9c000 CR3=000000000e764000 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