[ 23.853384] BUG: Bad rss-counter state mm:0000000060287f30 type:MM_FILEPAGES val:33 [ 23.854303] BUG: Bad rss-counter state mm:0000000060287f30 type:MM_ANONPAGES val:22 [ 24.078116] ================================================================== [ 24.079566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.081252] Read of size 8 at addr ffff88801bc69310 by task sshd/219 [ 24.082465] [ 24.082845] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.084232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.085303] Call Trace: [ 24.085601] [ 24.085860] dump_stack_lvl+0x91/0xf0 [ 24.086308] print_report+0xcc/0x620 [ 24.086748] ? __virt_addr_valid+0x102/0x340 [ 24.087259] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.087856] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.088417] kasan_report+0xbe/0xf0 [ 24.088850] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.089416] vma_interval_tree_remove+0xc75/0xec0 [ 24.089975] vma_prepare+0xc54/0x11a0 [ 24.090404] __split_vma+0x5af/0x950 [ 24.090833] ? __pfx___split_vma+0x10/0x10 [ 24.091314] ? find_held_lock+0x2c/0x110 [ 24.091804] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.092321] ? lock_is_held_type+0x9f/0x120 [ 24.092821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.093369] ? mtree_range_walk+0x632/0x900 [ 24.093879] ? mas_walk+0x5c7/0x7c0 [ 24.094302] do_vmi_munmap+0x1f1/0x2b0 [ 24.094751] mmap_region+0x1f9/0x2660 [ 24.095190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.095687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.096347] ? __pfx_lock_acquire+0x10/0x10 [ 24.096838] ? __pfx_mmap_region+0x10/0x10 [ 24.097321] ? security_mmap_addr+0x7d/0xa0 [ 24.097809] ? get_unmapped_area+0x1f5/0x3f0 [ 24.098306] do_mmap+0x854/0xf00 [ 24.098708] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.099155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.099680] ksys_mmap_pgoff+0x3af/0x500 [ 24.100141] do_syscall_64+0x3f/0x90 [ 24.100577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.101166] RIP: 0033:0x7f134f927d82 [ 24.101576] 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 [ 24.103555] RSP: 002b:00007ffd781871d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.104408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f134f927d82 [ 24.105203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f134ed61000 [ 24.105989] RBP: 00007f134ed61000 R08: 0000000000000009 R09: 0000000000001000 [ 24.106769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055877ec9cd90 [ 24.107553] R13: 00007ffd781871f0 R14: 00007ffd78187220 R15: 00007ffd78187580 [ 24.108354] [ 24.108620] [ 24.108818] Allocated by task 207: [ 24.109205] kasan_save_stack+0x22/0x50 [ 24.109668] kasan_set_track+0x25/0x30 [ 24.110118] __kasan_slab_alloc+0x59/0x70 [ 24.110598] kmem_cache_alloc+0x16b/0x370 [ 24.111069] vm_area_dup+0x20/0x160 [ 24.111478] __split_vma+0x170/0x950 [ 24.111997] split_vma+0xc6/0x110 [ 24.112397] mprotect_fixup+0x8d2/0xb30 [ 24.112862] do_mprotect_pkey+0x87e/0xd40 [ 24.113340] __x64_sys_mprotect+0x78/0xc0 [ 24.113816] do_syscall_64+0x3f/0x90 [ 24.114245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114837] [ 24.115031] Freed by task 19: [ 24.115385] kasan_save_stack+0x22/0x50 [ 24.115864] kasan_set_track+0x25/0x30 [ 24.116316] kasan_save_free_info+0x2b/0x50 [ 24.116801] __kasan_slab_free+0x10a/0x190 [ 24.117284] kmem_cache_free+0x10d/0x4d0 [ 24.117747] rcu_core+0x8c8/0x2860 [ 24.118148] __do_softirq+0x1b7/0x7d4 [ 24.118584] [ 24.118774] Last potentially related work creation: [ 24.119313] kasan_save_stack+0x22/0x50 [ 24.119782] __kasan_record_aux_stack+0x8e/0xa0 [ 24.120304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.120893] remove_vma+0x139/0x170 [ 24.121303] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.121833] do_vmi_munmap+0x1f1/0x2b0 [ 24.122308] __vm_munmap+0x138/0x3a0 [ 24.122728] __x64_sys_munmap+0x59/0x80 [ 24.123177] do_syscall_64+0x3f/0x90 [ 24.123609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.124217] [ 24.124411] The buggy address belongs to the object at ffff88801bc692b8 [ 24.124411] which belongs to the cache vm_area_struct of size 168 [ 24.125768] The buggy address is located 88 bytes inside of [ 24.125768] freed 168-byte region [ffff88801bc692b8, ffff88801bc69360) [ 24.127068] [ 24.127261] The buggy address belongs to the physical page: [ 24.127884] page:000000005d69de28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc69 [ 24.128953] memcg:ffff88801bc07501 [ 24.129333] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.129918] page_type: 0xffffffff() [ 24.130318] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.131156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc07501 [ 24.131871] page dumped because: kasan: bad access detected [ 24.132377] [ 24.132538] Memory state around the buggy address: [ 24.132985] ffff88801bc69200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.133634] ffff88801bc69280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.134279] >ffff88801bc69300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.134929] ^ [ 24.135285] ffff88801bc69380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.135946] ffff88801bc69400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.136629] ================================================================== [ 24.137353] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.059083] BUG: Bad rss-counter state mm:000000001d001023 type:MM_FILEPAGES val:33 [ 26.060308] BUG: Bad rss-counter state mm:000000001d001023 type:MM_ANONPAGES val:22 [ 26.482754] BUG: Bad rss-counter state mm:000000003171e527 type:MM_FILEPAGES val:33 [ 26.483799] BUG: Bad rss-counter state mm:000000003171e527 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58442' (ECDSA) to the list of known hosts. 2023/06/20 14:52:34 fuzzer started 2023/06/20 14:52:34 dialing manager at localhost:36067 2023/06/20 14:52:34 checking machine... 2023/06/20 14:52:34 checking revisions... [ 27.190894] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:52:34 testing simple program... [ 27.243792] cgroup: Unknown subsys name 'net' [ 27.292395] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:52:33 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=0000000000000001 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=00007fff5f1b54c8 CR3=0000000005482000 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=00007f44f028a51000005624cc37c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8363e063 RDX=00000000000263e0 RSI=00000000000263e0 RDI=ffffffff86582970 RBP=ffff88800cb7f760 RSP=ffff88800cb7f698 R8 =0000000000000000 R9 =ffff88800cb7f748 R10=0000000000038001 R11=000000000008a88c R12=ffff88800cb7f768 R13=ffff88800cb7f750 R14=ffff88800cb7f749 R15=ffff88800cb7f708 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f2848dfd900 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=00007ffc313c4000 CR3=000000000d944000 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