[ 83.834683] BUG: Bad rss-counter state mm:0000000078aca89a type:MM_FILEPAGES val:33 [ 83.835707] BUG: Bad rss-counter state mm:0000000078aca89a type:MM_ANONPAGES val:22 [ 84.011621] ================================================================== [ 84.012549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 84.013497] Read of size 8 at addr ffff88800e919a50 by task sshd/219 [ 84.014366] [ 84.014603] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 84.015665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 84.016641] Call Trace: [ 84.016977] [ 84.017264] dump_stack_lvl+0x91/0xf0 [ 84.017759] print_report+0xcc/0x620 [ 84.018251] ? __virt_addr_valid+0x102/0x340 [ 84.018820] ? vma_interval_tree_remove+0xc75/0xec0 [ 84.019458] ? vma_interval_tree_remove+0xc75/0xec0 [ 84.020082] kasan_report+0xbe/0xf0 [ 84.020567] ? vma_interval_tree_remove+0xc75/0xec0 [ 84.021185] vma_interval_tree_remove+0xc75/0xec0 [ 84.021785] vma_prepare+0xc54/0x11a0 [ 84.022266] __split_vma+0x5af/0x950 [ 84.022765] ? __pfx___split_vma+0x10/0x10 [ 84.023291] ? find_held_lock+0x2c/0x110 [ 84.023813] do_vmi_align_munmap+0x2ba/0x11f0 [ 84.024370] ? lock_is_held_type+0x9f/0x120 [ 84.024904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 84.025518] ? mtree_range_walk+0x632/0x900 [ 84.026074] ? mas_walk+0x5c7/0x7c0 [ 84.026564] do_vmi_munmap+0x1f1/0x2b0 [ 84.027053] mmap_region+0x1f9/0x2660 [ 84.027535] ? vm_mmap_pgoff+0x15c/0x3a0 [ 84.028045] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 84.028762] ? __pfx_lock_acquire+0x10/0x10 [ 84.029294] ? __pfx_mmap_region+0x10/0x10 [ 84.029818] ? security_mmap_addr+0x7d/0xa0 [ 84.030353] ? get_unmapped_area+0x1f5/0x3f0 [ 84.030913] do_mmap+0x854/0xf00 [ 84.031352] vm_mmap_pgoff+0x1a6/0x3a0 [ 84.031847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 84.032405] ksys_mmap_pgoff+0x3af/0x500 [ 84.032911] do_syscall_64+0x3f/0x90 [ 84.033387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.034035] RIP: 0033:0x7fa916585d82 [ 84.034497] 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 [ 84.036626] RSP: 002b:00007ffc319cd6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 84.037531] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa916585d82 [ 84.038374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9159bf000 [ 84.039240] RBP: 00007fa9159bf000 R08: 0000000000000009 R09: 0000000000001000 [ 84.040088] R10: 0000000000000812 R11: 0000000000000206 R12: 000056140964bec0 [ 84.040932] R13: 00007ffc319cd6d0 R14: 00007ffc319cd700 R15: 00007ffc319cda60 [ 84.041785] [ 84.042078] [ 84.042294] Allocated by task 212: [ 84.042737] kasan_save_stack+0x22/0x50 [ 84.043252] kasan_set_track+0x25/0x30 [ 84.043751] __kasan_slab_alloc+0x59/0x70 [ 84.044279] kmem_cache_alloc+0x16b/0x370 [ 84.044801] vm_area_dup+0x20/0x160 [ 84.045261] __split_vma+0x170/0x950 [ 84.045727] split_vma+0xc6/0x110 [ 84.046166] mprotect_fixup+0x8d2/0xb30 [ 84.046702] do_mprotect_pkey+0x87e/0xd40 [ 84.047228] __x64_sys_mprotect+0x78/0xc0 [ 84.047744] do_syscall_64+0x3f/0x90 [ 84.048224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.048868] [ 84.049085] Freed by task 203: [ 84.049479] kasan_save_stack+0x22/0x50 [ 84.049981] kasan_set_track+0x25/0x30 [ 84.050480] kasan_save_free_info+0x2b/0x50 [ 84.051014] __kasan_slab_free+0x10a/0x190 [ 84.051543] kmem_cache_free+0x10d/0x4d0 [ 84.052054] rcu_core+0x8c8/0x2860 [ 84.052502] __do_softirq+0x1b7/0x7d4 [ 84.052979] [ 84.053197] Last potentially related work creation: [ 84.053783] kasan_save_stack+0x22/0x50 [ 84.054292] __kasan_record_aux_stack+0x8e/0xa0 [ 84.054894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 84.055583] remove_vma+0x139/0x170 [ 84.056056] do_vmi_align_munmap+0xd4a/0x11f0 [ 84.056647] do_vmi_munmap+0x1f1/0x2b0 [ 84.057152] __vm_munmap+0x138/0x3a0 [ 84.057652] __x64_sys_munmap+0x59/0x80 [ 84.058170] do_syscall_64+0x3f/0x90 [ 84.058680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.059356] [ 84.059579] Second to last potentially related work creation: [ 84.060309] kasan_save_stack+0x22/0x50 [ 84.060843] __kasan_record_aux_stack+0x8e/0xa0 [ 84.061451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 84.062119] remove_vma+0x139/0x170 [ 84.062585] do_vmi_align_munmap+0xd4a/0x11f0 [ 84.063153] do_vmi_munmap+0x1f1/0x2b0 [ 84.063649] mmap_region+0x1f9/0x2660 [ 84.064133] do_mmap+0x854/0xf00 [ 84.064564] vm_mmap_pgoff+0x1a6/0x3a0 [ 84.065061] ksys_mmap_pgoff+0x3af/0x500 [ 84.065578] do_syscall_64+0x3f/0x90 [ 84.066054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 84.066705] [ 84.066922] The buggy address belongs to the object at ffff88800e9199f8 [ 84.066922] which belongs to the cache vm_area_struct of size 168 [ 84.068407] The buggy address is located 88 bytes inside of [ 84.068407] freed 168-byte region [ffff88800e9199f8, ffff88800e919aa0) [ 84.069870] [ 84.070089] The buggy address belongs to the physical page: [ 84.070762] page:00000000df765de4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe919 [ 84.071859] memcg:ffff88800ea22401 [ 84.072293] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 84.073005] page_type: 0xffffffff() [ 84.073455] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3700 dead000000000003 [ 84.074384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea22401 [ 84.075302] page dumped because: kasan: bad access detected [ 84.075965] [ 84.076183] Memory state around the buggy address: [ 84.076777] ffff88800e919900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 84.077640] ffff88800e919980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 84.078526] >ffff88800e919a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 84.079406] ^ [ 84.080117] ffff88800e919a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 84.080979] ffff88800e919b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 84.081840] ================================================================== [ 84.082836] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 85.725842] BUG: Bad rss-counter state mm:00000000bc84c897 type:MM_FILEPAGES val:33 [ 85.726496] BUG: Bad rss-counter state mm:00000000bc84c897 type:MM_ANONPAGES val:22 [ 86.172677] BUG: Bad rss-counter state mm:00000000353b6350 type:MM_FILEPAGES val:33 [ 86.173873] BUG: Bad rss-counter state mm:00000000353b6350 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65333' (ECDSA) to the list of known hosts. 2023/06/19 10:53:40 fuzzer started 2023/06/19 10:53:40 dialing manager at localhost:44161 2023/06/19 10:53:40 checking machine... 2023/06/19 10:53:40 checking revisions... [ 86.772906] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:53:41 testing simple program... [ 86.813267] cgroup: Unknown subsys name 'net' [ 86.853775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:52:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffeb9af4608 CR3=000000000fda8000 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=2030343a33353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb1ab1 RBX=ffffffff85d8d58c RCX=ffffffff8110261e RDX=0000000000000000 RSI=ffffffff86090648 RDI=ffffffff85d8d57c RBP=ffffffff85d8d57c RSP=ffff88806cf099b8 R8 =ffffffff86090648 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000506a R12=ffffffff85d8d5a0 R13=ffffffff85d8d57c R14=ffffffff85d8d57c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----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 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=00007f1621e91ee0 CR3=000000000d58c000 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=ebf4124adcc27daee34e81face0a31e9 XMM02=0000000000121190ec2efd57dc4c00df XMM03=0000000000127be08aa39dd07266ea73 XMM04=03aeda4c371abdf400000000000ae988 XMM05=dfcdbad4f1609c370000000000138e50 XMM06=27b6cc49762c0cd00000000000138028 XMM07=e042d86d42eb936e0000000000127e60 XMM08=8aa39dd07266ea7300000000001211f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000