[ 46.854599] BUG: Bad rss-counter state mm:0000000026c3358a type:MM_FILEPAGES val:33 [ 46.855290] BUG: Bad rss-counter state mm:0000000026c3358a type:MM_ANONPAGES val:22 [ 46.988482] ================================================================== [ 46.989087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.989673] Read of size 8 at addr ffff88800e6c66b0 by task sshd/218 [ 46.990122] [ 46.990256] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.990805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.991422] Call Trace: [ 46.991632] [ 46.991821] dump_stack_lvl+0x91/0xf0 [ 46.992146] print_report+0xcc/0x620 [ 46.992699] ? __virt_addr_valid+0x102/0x340 [ 46.993048] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.993452] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.993905] kasan_report+0xbe/0xf0 [ 46.994227] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.994631] vma_interval_tree_remove+0xc75/0xec0 [ 46.995056] vma_prepare+0xc54/0x11a0 [ 46.995395] __split_vma+0x5af/0x950 [ 46.995718] ? __pfx___split_vma+0x10/0x10 [ 46.996082] ? find_held_lock+0x2c/0x110 [ 46.996431] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.996806] ? lock_is_held_type+0x9f/0x120 [ 46.997158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.997597] ? mtree_range_walk+0x632/0x900 [ 46.997955] ? mas_walk+0x5c7/0x7c0 [ 46.998261] do_vmi_munmap+0x1f1/0x2b0 [ 46.998586] mmap_region+0x1f9/0x2660 [ 46.998962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.999323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.999807] ? __pfx_lock_acquire+0x10/0x10 [ 47.000167] ? __pfx_mmap_region+0x10/0x10 [ 47.000526] ? security_mmap_addr+0x7d/0xa0 [ 47.000876] ? get_unmapped_area+0x1f5/0x3f0 [ 47.001265] do_mmap+0x854/0xf00 [ 47.001630] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.001980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.002353] ksys_mmap_pgoff+0x3af/0x500 [ 47.002696] do_syscall_64+0x3f/0x90 [ 47.003023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.003457] RIP: 0033:0x7f793c79dd82 [ 47.003794] 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 [ 47.005283] RSP: 002b:00007ffea66be558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.005944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f793c79dd82 [ 47.006533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f793bbd7000 [ 47.007119] RBP: 00007f793bbd7000 R08: 0000000000000009 R09: 0000000000001000 [ 47.007706] R10: 0000000000000812 R11: 0000000000000206 R12: 000056429d46fec0 [ 47.008296] R13: 00007ffea66be570 R14: 00007ffea66be5a0 R15: 00007ffea66be900 [ 47.008865] [ 47.009056] [ 47.009194] Allocated by task 211: [ 47.009459] kasan_save_stack+0x22/0x50 [ 47.009812] kasan_set_track+0x25/0x30 [ 47.010129] __kasan_slab_alloc+0x59/0x70 [ 47.010502] kmem_cache_alloc+0x16b/0x370 [ 47.010869] vm_area_dup+0x20/0x160 [ 47.011194] __split_vma+0x170/0x950 [ 47.011519] split_vma+0xc6/0x110 [ 47.011797] mprotect_fixup+0x8d2/0xb30 [ 47.012124] do_mprotect_pkey+0x87e/0xd40 [ 47.012479] __x64_sys_mprotect+0x78/0xc0 [ 47.012815] do_syscall_64+0x3f/0x90 [ 47.013143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.013630] [ 47.013780] Freed by task 202: [ 47.014033] kasan_save_stack+0x22/0x50 [ 47.014347] kasan_set_track+0x25/0x30 [ 47.014633] kasan_save_free_info+0x2b/0x50 [ 47.014942] __kasan_slab_free+0x10a/0x190 [ 47.015253] kmem_cache_free+0x10d/0x4d0 [ 47.015581] rcu_core+0x8c8/0x2860 [ 47.015883] __do_softirq+0x1b7/0x7d4 [ 47.016221] [ 47.016369] Last potentially related work creation: [ 47.016751] kasan_save_stack+0x22/0x50 [ 47.017078] __kasan_record_aux_stack+0x8e/0xa0 [ 47.017559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.017995] remove_vma+0x139/0x170 [ 47.018294] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.018677] do_vmi_munmap+0x1f1/0x2b0 [ 47.018997] __vm_munmap+0x138/0x3a0 [ 47.019299] __x64_sys_munmap+0x59/0x80 [ 47.019619] do_syscall_64+0x3f/0x90 [ 47.019929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.020465] [ 47.020607] Second to last potentially related work creation: [ 47.021052] kasan_save_stack+0x22/0x50 [ 47.021362] __kasan_record_aux_stack+0x8e/0xa0 [ 47.021753] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.022190] remove_vma+0x139/0x170 [ 47.022491] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.022854] do_vmi_munmap+0x1f1/0x2b0 [ 47.023174] mmap_region+0x1f9/0x2660 [ 47.023501] do_mmap+0x854/0xf00 [ 47.023796] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.024131] ksys_mmap_pgoff+0x3af/0x500 [ 47.024456] do_syscall_64+0x3f/0x90 [ 47.024765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.025177] [ 47.025323] The buggy address belongs to the object at ffff88800e6c6658 [ 47.025323] which belongs to the cache vm_area_struct of size 168 [ 47.026334] The buggy address is located 88 bytes inside of [ 47.026334] freed 168-byte region [ffff88800e6c6658, ffff88800e6c6700) [ 47.027240] [ 47.027377] The buggy address belongs to the physical page: [ 47.027792] page:000000006ef67df6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6c6 [ 47.028469] memcg:ffff888009a7a801 [ 47.028734] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.029159] page_type: 0xffffffff() [ 47.029442] raw: 0100000000000200 ffff88800879fc80 ffffea000039bdc0 dead000000000005 [ 47.030041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a7a801 [ 47.030607] page dumped because: kasan: bad access detected [ 47.031011] [ 47.031141] Memory state around the buggy address: [ 47.031493] ffff88800e6c6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.032016] ffff88800e6c6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.032532] >ffff88800e6c6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.033072] ^ [ 47.033482] ffff88800e6c6700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 47.034212] ffff88800e6c6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 47.034775] ================================================================== [ 47.035540] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 48.555269] BUG: Bad rss-counter state mm:00000000aa07a7f0 type:MM_FILEPAGES val:33 [ 48.555963] BUG: Bad rss-counter state mm:00000000aa07a7f0 type:MM_ANONPAGES val:22 [ 48.969320] BUG: Bad rss-counter state mm:000000005294efc0 type:MM_FILEPAGES val:33 [ 48.970100] BUG: Bad rss-counter state mm:000000005294efc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25396' (ECDSA) to the list of known hosts. 2023/06/20 09:45:51 fuzzer started 2023/06/20 09:45:51 dialing manager at localhost:44161 2023/06/20 09:45:51 checking machine... 2023/06/20 09:45:51 checking revisions... [ 49.487086] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:45:52 testing simple program... [ 49.523732] cgroup: Unknown subsys name 'net' [ 49.578297] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:45:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860d68f6 RDX=1ffff1100d9c1360 RSI=1ffff1100d9c135e RDI=ffff88806ce09b00 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff811310f5 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 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=00007ffec511d908 CR3=000000000e19a000 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=2031353a35343a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000042a50 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=ffff88806cf42a70 RSP=ffff888019cd7c58 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000c000b R12=ffff888008fce000 R13=ffffea0000392fc0 R14=ffff888008fce000 R15=0000000000000001 RIP=ffffffff818060f6 RFL=00000082 [--S----] 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 00007f0c01b45900 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=00007f0c020fd0b0 CR3=00000000169f4000 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