[ 30.934095] BUG: Bad rss-counter state mm:00000000aae0ee6a type:MM_FILEPAGES val:33 [ 30.935362] BUG: Bad rss-counter state mm:00000000aae0ee6a type:MM_ANONPAGES val:22 [ 31.082049] ================================================================== [ 31.082954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.083888] Read of size 8 at addr ffff88800f0e7a50 by task sshd/226 [ 31.084667] [ 31.084885] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.085924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.086899] Call Trace: [ 31.087222] [ 31.087509] dump_stack_lvl+0x91/0xf0 [ 31.088122] print_report+0xcc/0x620 [ 31.088697] ? __virt_addr_valid+0x102/0x340 [ 31.089358] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090809] kasan_report+0xbe/0xf0 [ 31.091375] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.092120] vma_interval_tree_remove+0xc75/0xec0 [ 31.092835] vma_prepare+0xc54/0x11a0 [ 31.093432] __split_vma+0x5af/0x950 [ 31.093993] ? __pfx___split_vma+0x10/0x10 [ 31.094544] ? find_held_lock+0x2c/0x110 [ 31.095072] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.095646] ? lock_is_held_type+0x9f/0x120 [ 31.096184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.096795] ? mtree_range_walk+0x632/0x900 [ 31.097352] ? mas_walk+0x5c7/0x7c0 [ 31.097828] do_vmi_munmap+0x1f1/0x2b0 [ 31.098325] mmap_region+0x1f9/0x2660 [ 31.098813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.099332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.100041] ? __pfx_lock_acquire+0x10/0x10 [ 31.100569] ? __pfx_mmap_region+0x10/0x10 [ 31.101120] ? security_mmap_addr+0x7d/0xa0 [ 31.101648] ? get_unmapped_area+0x1f5/0x3f0 [ 31.102203] do_mmap+0x854/0xf00 [ 31.102644] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.103135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.103695] ksys_mmap_pgoff+0x3af/0x500 [ 31.104208] do_syscall_64+0x3f/0x90 [ 31.104687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.105372] RIP: 0033:0x7f1acb1abd82 [ 31.105831] 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 [ 31.107991] RSP: 002b:00007ffc3b6d5b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.108897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1acb1abd82 [ 31.109766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1aca5e5000 [ 31.110612] RBP: 00007f1aca5e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.111471] R10: 0000000000000812 R11: 0000000000000206 R12: 000055829b392f70 [ 31.112318] R13: 00007ffc3b6d5b30 R14: 00007ffc3b6d5b60 R15: 00007ffc3b6d5ec0 [ 31.113186] [ 31.113476] [ 31.113694] Allocated by task 215: [ 31.114123] kasan_save_stack+0x22/0x50 [ 31.114629] kasan_set_track+0x25/0x30 [ 31.115132] __kasan_slab_alloc+0x59/0x70 [ 31.115650] kmem_cache_alloc+0x16b/0x370 [ 31.116170] vm_area_dup+0x20/0x160 [ 31.116625] __split_vma+0x170/0x950 [ 31.117113] split_vma+0xc6/0x110 [ 31.117552] mprotect_fixup+0x8d2/0xb30 [ 31.118060] do_mprotect_pkey+0x87e/0xd40 [ 31.118583] __x64_sys_mprotect+0x78/0xc0 [ 31.119106] do_syscall_64+0x3f/0x90 [ 31.119580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.120232] [ 31.120446] Freed by task 215: [ 31.120845] kasan_save_stack+0x22/0x50 [ 31.121359] kasan_set_track+0x25/0x30 [ 31.121851] kasan_save_free_info+0x2b/0x50 [ 31.122384] __kasan_slab_free+0x10a/0x190 [ 31.122923] kmem_cache_free+0x10d/0x4d0 [ 31.123434] rcu_core+0x8c8/0x2860 [ 31.123877] __do_softirq+0x1b7/0x7d4 [ 31.124351] [ 31.124564] Last potentially related work creation: [ 31.125167] kasan_save_stack+0x22/0x50 [ 31.125670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.126245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.126907] remove_vma+0x139/0x170 [ 31.127364] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.127923] do_vmi_munmap+0x1f1/0x2b0 [ 31.128413] __vm_munmap+0x138/0x3a0 [ 31.128882] __x64_sys_munmap+0x59/0x80 [ 31.129391] do_syscall_64+0x3f/0x90 [ 31.129866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.130511] [ 31.130725] The buggy address belongs to the object at ffff88800f0e79f8 [ 31.130725] which belongs to the cache vm_area_struct of size 168 [ 31.132213] The buggy address is located 88 bytes inside of [ 31.132213] freed 168-byte region [ffff88800f0e79f8, ffff88800f0e7aa0) [ 31.133664] [ 31.133882] The buggy address belongs to the physical page: [ 31.134540] page:0000000065eb4953 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0e7 [ 31.135620] memcg:ffff88800cc4b401 [ 31.136047] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.136695] page_type: 0xffffffff() [ 31.137150] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.138090] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc4b401 [ 31.139013] page dumped because: kasan: bad access detected [ 31.139677] [ 31.139890] Memory state around the buggy address: [ 31.140473] ffff88800f0e7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.141342] ffff88800f0e7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.142215] >ffff88800f0e7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.143071] ^ [ 31.143774] ffff88800f0e7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.144640] ffff88800f0e7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.145544] ================================================================== [ 31.146494] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.909732] BUG: Bad rss-counter state mm:000000006ff1185a type:MM_FILEPAGES val:33 [ 33.911068] BUG: Bad rss-counter state mm:000000006ff1185a type:MM_ANONPAGES val:22 [ 34.278479] BUG: Bad rss-counter state mm:000000007ee0e717 type:MM_FILEPAGES val:33 [ 34.279461] BUG: Bad rss-counter state mm:000000007ee0e717 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8935' (ECDSA) to the list of known hosts. 2023/06/20 17:52:43 fuzzer started 2023/06/20 17:52:43 dialing manager at localhost:36067 2023/06/20 17:52:43 checking machine... 2023/06/20 17:52:43 checking revisions... [ 34.992850] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:52:44 testing simple program... [ 35.045290] cgroup: Unknown subsys name 'net' [ 35.107783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:43 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=00007fa1c60afd70 CR3=00000000068d8000 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=2033343a32353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a32353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138f52 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f117730 RSP=ffff88800f117668 R8 =ffffffff86138f56 R9 =ffff88800f117718 R10=0000000000038001 R11=0000000000020db7 R12=ffff88800f117738 R13=ffff88800f117720 R14=0000000000000005 R15=ffff88800f1176d8 RIP=ffffffff81130b2b RFL=00000297 [--S-APC] 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 00007fbf41c62900 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=00007fbf41bff008 CR3=000000001cce0000 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