[ 23.910630] BUG: Bad rss-counter state mm:000000001587c9e2 type:MM_FILEPAGES val:33 [ 23.912070] BUG: Bad rss-counter state mm:000000001587c9e2 type:MM_ANONPAGES val:22 [ 24.062897] ================================================================== [ 24.063825] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.064771] Read of size 8 at addr ffff88800fd7f5c8 by task sshd/220 [ 24.065640] [ 24.065908] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.066784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.067788] Call Trace: [ 24.068137] <TASK> [ 24.068423] dump_stack_lvl+0x91/0xf0 [ 24.068953] print_report+0xcc/0x620 [ 24.069444] ? __virt_addr_valid+0x102/0x340 [ 24.070014] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.070642] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.071265] kasan_report+0xbe/0xf0 [ 24.071765] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.072388] vma_interval_tree_remove+0xc75/0xec0 [ 24.073026] vma_prepare+0xc54/0x11a0 [ 24.073516] __split_vma+0x5af/0x950 [ 24.074016] ? __pfx___split_vma+0x10/0x10 [ 24.074552] ? find_held_lock+0x2c/0x110 [ 24.075088] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.075664] ? lock_is_held_type+0x9f/0x120 [ 24.076208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.076862] ? mtree_range_walk+0x632/0x900 [ 24.077424] ? mas_walk+0x5c7/0x7c0 [ 24.077913] do_vmi_munmap+0x1f1/0x2b0 [ 24.078407] mmap_region+0x1f9/0x2660 [ 24.078900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.079418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.080145] ? __pfx_lock_acquire+0x10/0x10 [ 24.080698] ? __pfx_mmap_region+0x10/0x10 [ 24.081261] ? security_mmap_addr+0x7d/0xa0 [ 24.081823] ? get_unmapped_area+0x1f5/0x3f0 [ 24.082378] do_mmap+0x854/0xf00 [ 24.082842] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.083343] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.083920] ksys_mmap_pgoff+0x3af/0x500 [ 24.084434] do_syscall_64+0x3f/0x90 [ 24.084938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.085591] RIP: 0033:0x7fc15ad53d82 [ 24.086066] 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 [ 24.088239] RSP: 002b:00007fff15ad4aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.089197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc15ad53d82 [ 24.090126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc15a18d000 [ 24.091046] RBP: 00007fc15a18d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.091982] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c87bb2980 [ 24.092910] R13: 00007fff15ad4ac0 R14: 00007fff15ad4af0 R15: 00007fff15ad4e50 [ 24.093829] </TASK> [ 24.094141] [ 24.094367] Allocated by task 213: [ 24.094830] kasan_save_stack+0x22/0x50 [ 24.095362] kasan_set_track+0x25/0x30 [ 24.095910] __kasan_slab_alloc+0x59/0x70 [ 24.096474] kmem_cache_alloc+0x16b/0x370 [ 24.097044] vm_area_dup+0x20/0x160 [ 24.097522] __split_vma+0x170/0x950 [ 24.098032] split_vma+0xc6/0x110 [ 24.098507] mprotect_fixup+0x8d2/0xb30 [ 24.099045] do_mprotect_pkey+0x87e/0xd40 [ 24.099594] __x64_sys_mprotect+0x78/0xc0 [ 24.100156] do_syscall_64+0x3f/0x90 [ 24.100672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.101396] [ 24.101635] Freed by task 213: [ 24.102060] kasan_save_stack+0x22/0x50 [ 24.102597] kasan_set_track+0x25/0x30 [ 24.103136] kasan_save_free_info+0x2b/0x50 [ 24.103705] __kasan_slab_free+0x10a/0x190 [ 24.104260] kmem_cache_free+0x10d/0x4d0 [ 24.104833] rcu_core+0x8c8/0x2860 [ 24.105303] __do_softirq+0x1b7/0x7d4 [ 24.105818] [ 24.106042] Last potentially related work creation: [ 24.106674] kasan_save_stack+0x22/0x50 [ 24.107243] __kasan_record_aux_stack+0x8e/0xa0 [ 24.107869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.108549] remove_vma+0x139/0x170 [ 24.109074] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.109686] do_vmi_munmap+0x1f1/0x2b0 [ 24.110211] __vm_munmap+0x138/0x3a0 [ 24.110726] __x64_sys_munmap+0x59/0x80 [ 24.111260] do_syscall_64+0x3f/0x90 [ 24.111753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.112407] [ 24.112628] The buggy address belongs to the object at ffff88800fd7f570 [ 24.112628] which belongs to the cache vm_area_struct of size 168 [ 24.114134] The buggy address is located 88 bytes inside of [ 24.114134] freed 168-byte region [ffff88800fd7f570, ffff88800fd7f618) [ 24.115604] [ 24.115839] The buggy address belongs to the physical page: [ 24.116540] page:0000000088bdaf43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd7f [ 24.117727] memcg:ffff888016b40001 [ 24.118186] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.118933] page_type: 0xffffffff() [ 24.119414] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ad080 dead000000000007 [ 24.120435] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b40001 [ 24.121437] page dumped because: kasan: bad access detected [ 24.122164] [ 24.122393] Memory state around the buggy address: [ 24.123019] ffff88800fd7f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.123938] ffff88800fd7f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.124883] >ffff88800fd7f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.125819] ^ [ 24.126534] ffff88800fd7f600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.127452] ffff88800fd7f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.128382] ================================================================== [ 24.129417] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.928354] BUG: Bad rss-counter state mm:0000000020a434dd type:MM_FILEPAGES val:33 [ 25.929275] BUG: Bad rss-counter state mm:0000000020a434dd type:MM_ANONPAGES val:22 [ 26.535248] BUG: Bad rss-counter state mm:00000000d6c9c630 type:MM_FILEPAGES val:33 [ 26.536253] BUG: Bad rss-counter state mm:00000000d6c9c630 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47625' (ECDSA) to the list of known hosts. 2023/06/20 20:45:37 fuzzer started 2023/06/20 20:45:37 dialing manager at localhost:36067 2023/06/20 20:45:37 checking machine... 2023/06/20 20:45:37 checking revisions... [ 27.166185] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:45:37 testing simple program... [ 27.208650] cgroup: Unknown subsys name 'net' [ 27.258622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:45:37 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000f20 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88801c664140 RSP=ffff8880183f73e8 R8 =0000000000000004 R9 =0000000000000014 R10=0000000000000fa0 R11=0000062500000625 R12=0000000000000014 R13=ffff88800a928f20 R14=0000000000000000 R15=0000000000000fa0 RIP=ffffffff814c0400 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 00007f9df00cb900 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=00007f9df0682618 CR3=000000000e3f2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f86f5376e40 CR3=000000000cb24000 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=9ee82167a3c77eb73842b31fc1723a83 XMM02=000000000011c398eff9b2d0a8fce9cb XMM03=000000000011c4682c67c8bc2e329bc3 XMM04=b73ee928681bed4e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132200 XMM06=117caf44e75eb69e00000000001313d8 XMM07=e042d86d42eb936e00000000001229c8 XMM08=a9edee0dc0951ce4000000000011c468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000