[ 31.208272] BUG: Bad rss-counter state mm:000000008fabb179 type:MM_FILEPAGES val:33 [ 31.209506] BUG: Bad rss-counter state mm:000000008fabb179 type:MM_ANONPAGES val:22 [ 31.246450] ================================================================== [ 31.247600] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.248697] Read of size 8 at addr ffff88801abc6798 by task sshd/219 [ 31.249668] [ 31.249899] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.250910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.252036] Call Trace: [ 31.252365] [ 31.252658] dump_stack_lvl+0x91/0xf0 [ 31.253183] print_report+0xcc/0x620 [ 31.253683] ? __virt_addr_valid+0x102/0x340 [ 31.254249] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254899] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255546] kasan_report+0xbe/0xf0 [ 31.256040] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256682] vma_interval_tree_remove+0xc75/0xec0 [ 31.257344] vma_prepare+0xc54/0x11a0 [ 31.257838] __split_vma+0x5af/0x950 [ 31.258332] ? __pfx___split_vma+0x10/0x10 [ 31.258882] ? find_held_lock+0x2c/0x110 [ 31.259428] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.260022] ? lock_is_held_type+0x9f/0x120 [ 31.260588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.261237] ? mtree_range_walk+0x632/0x900 [ 31.261813] ? mas_walk+0x5c7/0x7c0 [ 31.262308] do_vmi_munmap+0x1f1/0x2b0 [ 31.262837] mmap_region+0x1f9/0x2660 [ 31.263342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.263882] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.264640] ? __pfx_lock_acquire+0x10/0x10 [ 31.265210] ? __pfx_mmap_region+0x10/0x10 [ 31.265771] ? security_mmap_addr+0x7d/0xa0 [ 31.266347] ? get_unmapped_area+0x1f5/0x3f0 [ 31.266919] do_mmap+0x854/0xf00 [ 31.267380] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.267911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.268497] ksys_mmap_pgoff+0x3af/0x500 [ 31.269039] do_syscall_64+0x3f/0x90 [ 31.269519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.270171] RIP: 0033:0x7f7cba444d82 [ 31.270624] 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 [ 31.272792] RSP: 002b:00007fffbcc2d5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.273875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cba444d82 [ 31.274752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cb987e000 [ 31.275633] RBP: 00007f7cb987e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.276487] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a78ce00ec0 [ 31.277356] R13: 00007fffbcc2d5d0 R14: 00007fffbcc2d600 R15: 00007fffbcc2d960 [ 31.278208] [ 31.278496] [ 31.278710] Allocated by task 211: [ 31.279137] kasan_save_stack+0x22/0x50 [ 31.279640] kasan_set_track+0x25/0x30 [ 31.280129] __kasan_slab_alloc+0x59/0x70 [ 31.280654] kmem_cache_alloc+0x16b/0x370 [ 31.281176] vm_area_dup+0x20/0x160 [ 31.281629] __split_vma+0x170/0x950 [ 31.282095] split_vma+0xc6/0x110 [ 31.282536] mprotect_fixup+0x8d2/0xb30 [ 31.283040] do_mprotect_pkey+0x87e/0xd40 [ 31.283557] __x64_sys_mprotect+0x78/0xc0 [ 31.284083] do_syscall_64+0x3f/0x90 [ 31.284559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285210] [ 31.285428] Freed by task 211: [ 31.285821] kasan_save_stack+0x22/0x50 [ 31.286330] kasan_set_track+0x25/0x30 [ 31.286820] kasan_save_free_info+0x2b/0x50 [ 31.287354] __kasan_slab_free+0x10a/0x190 [ 31.287888] kmem_cache_free+0x10d/0x4d0 [ 31.288393] rcu_core+0x8c8/0x2860 [ 31.288850] __do_softirq+0x1b7/0x7d4 [ 31.289329] [ 31.289543] Last potentially related work creation: [ 31.290125] kasan_save_stack+0x22/0x50 [ 31.290622] __kasan_record_aux_stack+0x8e/0xa0 [ 31.291200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291841] remove_vma+0x139/0x170 [ 31.292291] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.292852] do_vmi_munmap+0x1f1/0x2b0 [ 31.293346] __vm_munmap+0x138/0x3a0 [ 31.293819] __x64_sys_munmap+0x59/0x80 [ 31.294312] do_syscall_64+0x3f/0x90 [ 31.294782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295421] [ 31.295640] The buggy address belongs to the object at ffff88801abc6740 [ 31.295640] which belongs to the cache vm_area_struct of size 168 [ 31.297123] The buggy address is located 88 bytes inside of [ 31.297123] freed 168-byte region [ffff88801abc6740, ffff88801abc67e8) [ 31.298527] [ 31.298744] The buggy address belongs to the physical page: [ 31.299405] page:000000007554b513 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1abc6 [ 31.300492] memcg:ffff88801aab1801 [ 31.300927] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.301571] page_type: 0xffffffff() [ 31.302027] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.302964] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aab1801 [ 31.303886] page dumped because: kasan: bad access detected [ 31.304542] [ 31.304754] Memory state around the buggy address: [ 31.305361] ffff88801abc6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.306221] ffff88801abc6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.307088] >ffff88801abc6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.307958] ^ [ 31.308454] ffff88801abc6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.309325] ffff88801abc6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.310183] ================================================================== [ 31.311318] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.837432] BUG: Bad rss-counter state mm:00000000eb65f009 type:MM_FILEPAGES val:33 [ 33.838306] BUG: Bad rss-counter state mm:00000000eb65f009 type:MM_ANONPAGES val:22 [ 34.297522] BUG: Bad rss-counter state mm:0000000098cbebef type:MM_FILEPAGES val:33 [ 34.298290] BUG: Bad rss-counter state mm:0000000098cbebef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44914' (ECDSA) to the list of known hosts. 2023/06/21 07:58:18 fuzzer started 2023/06/21 07:58:18 dialing manager at localhost:36067 2023/06/21 07:58:18 checking machine... 2023/06/21 07:58:18 checking revisions... [ 34.987961] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:58:18 testing simple program... [ 35.029255] cgroup: Unknown subsys name 'net' [ 35.076027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:18 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=00007f2616c3a050 CR3=0000000017446000 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=2037313a38353a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a38353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000006 RCX=ffffffff84499049 RDX=ffff88800dc8d1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000011 RSP=ffff8880169b7440 R8 =0000000000000007 R9 =0000000000000000 R10=00007fbe74b42fff R11=ffff88800e2da000 R12=ffff8880169b7768 R13=ffff88801aafe838 R14=00007fbe74b42fff R15=0000000000000010 RIP=ffffffff814c086b RFL=00000206 [-----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 00007fbe74b4a900 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=00007fbe74b29020 CR3=0000000014586000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000