================================================================== BUG: KASAN: use-after-free in cleancache_fs_enabled_mapping include/linux/cleancache.h:54 [inline] BUG: KASAN: use-after-free in cleancache_invalidate_page include/linux/cleancache.h:108 [inline] BUG: KASAN: use-after-free in unaccount_page_cache_page+0x639/0x6b0 mm/filemap.c:169 Read of size 4 at addr ffff8881952ed488 by task syz-executor.3/13369 CPU: 0 PID: 13369 Comm: syz-executor.3 Not tainted 5.4.233-syzkaller-00032-g21086923c1e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 print_address_description+0x8c/0x600 mm/kasan/report.c:384 __kasan_report+0xf3/0x120 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 cleancache_fs_enabled_mapping include/linux/cleancache.h:54 [inline] cleancache_invalidate_page include/linux/cleancache.h:108 [inline] unaccount_page_cache_page+0x639/0x6b0 mm/filemap.c:169 __delete_from_page_cache+0xc3/0x510 mm/filemap.c:237 __remove_mapping+0x46e/0x550 mm/vmscan.c:978 shrink_page_list+0x2467/0x3e70 mm/vmscan.c:1482 shrink_inactive_list+0x4f6/0xfd0 mm/vmscan.c:2001 shrink_list mm/vmscan.c:2293 [inline] shrink_node_memcg+0xc42/0x2430 mm/vmscan.c:2623 shrink_node+0x396/0x12b0 mm/vmscan.c:2836 shrink_zones mm/vmscan.c:3053 [inline] do_try_to_free_pages+0x625/0x1280 mm/vmscan.c:3111 try_to_free_mem_cgroup_pages+0x3f6/0x9b0 mm/vmscan.c:3412 memory_max_write+0x235/0x3c0 mm/memcontrol.c:6220 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315 __vfs_write+0x103/0x750 fs/read_write.c:494 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Allocated by task 12206: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] __kasan_kmalloc+0x130/0x1d0 mm/kasan/common.c:529 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:690 [inline] ops_init+0x86/0x4a0 net/core/net_namespace.c:128 setup_net+0x214/0x990 net/core/net_namespace.c:345 copy_net_ns+0x30f/0x510 net/core/net_namespace.c:486 create_new_namespaces+0x47a/0x570 kernel/nsproxy.c:103 copy_namespaces+0x169/0x1b0 kernel/nsproxy.c:161 copy_process+0x12da/0x3230 kernel/fork.c:2044 _do_fork+0x197/0x900 kernel/fork.c:2391 __do_sys_clone kernel/fork.c:2549 [inline] __se_sys_clone kernel/fork.c:2530 [inline] __x64_sys_clone+0x26b/0x2c0 kernel/fork.c:2530 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Freed by task 92: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] kasan_set_free_info mm/kasan/common.c:345 [inline] __kasan_slab_free+0x178/0x230 mm/kasan/common.c:487 slab_free_hook mm/slub.c:1455 [inline] slab_free_freelist_hook mm/slub.c:1494 [inline] slab_free mm/slub.c:3080 [inline] kfree+0xeb/0x320 mm/slub.c:4071 ops_free net/core/net_namespace.c:158 [inline] ops_free_list net/core/net_namespace.c:193 [inline] cleanup_net+0x899/0xc90 net/core/net_namespace.c:613 process_one_work+0x765/0xd20 kernel/workqueue.c:2287 worker_thread+0xaef/0x1470 kernel/workqueue.c:2433 kthread+0x2da/0x360 kernel/kthread.c:288 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354 The buggy address belongs to the object at ffff8881952ed000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1160 bytes inside of 2048-byte region [ffff8881952ed000, ffff8881952ed800) The buggy address belongs to the page: page:ffffea000654ba00 refcount:1 mapcount:0 mapping:ffff8881f5c0c000 index:0xffff8881952ed000 compound_mapcount: 0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 ffffea00076e8008 ffffea0007899a08 ffff8881f5c0c000 raw: ffff8881952ed000 0000000000080002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x18f/0x370 mm/page_alloc.c:2171 get_page_from_freelist+0x2ce8/0x2d70 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891 alloc_slab_page+0x39/0x3c0 mm/slub.c:343 allocate_slab mm/slub.c:1683 [inline] new_slab+0x97/0x440 mm/slub.c:1749 new_slab_objects mm/slub.c:2505 [inline] ___slab_alloc+0x2fe/0x490 mm/slub.c:2667 __slab_alloc+0x5a/0x90 mm/slub.c:2707 slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2837 [inline] __kmalloc_track_caller+0x168/0x290 mm/slub.c:4449 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0xb4/0x4d0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1079 [inline] nlmsg_new include/net/netlink.h:888 [inline] inet6_ifinfo_notify+0x69/0x110 net/ipv6/addrconf.c:5952 addrconf_notify+0xb3b/0xe50 net/ipv6/addrconf.c:3660 notifier_call_chain kernel/notifier.c:98 [inline] __raw_notifier_call_chain kernel/notifier.c:399 [inline] raw_notifier_call_chain+0x95/0x110 kernel/notifier.c:406 __dev_notify_flags+0x26e/0x510 net/core/dev.c:1670 dev_change_flags+0xe7/0x190 net/core/dev.c:8001 do_setlink+0xc4c/0x3b70 net/core/rtnetlink.c:2520 __rtnl_newlink net/core/rtnetlink.c:3163 [inline] rtnl_newlink+0x1666/0x2010 net/core/rtnetlink.c:3289 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1176 [inline] __free_pages_ok+0x83d/0x940 mm/page_alloc.c:1438 free_the_page mm/page_alloc.c:4953 [inline] __free_pages+0x91/0x140 mm/page_alloc.c:4959 __free_slab+0x221/0x2e0 mm/slub.c:1774 free_slab mm/slub.c:1789 [inline] discard_slab mm/slub.c:1795 [inline] unfreeze_partials+0x14e/0x180 mm/slub.c:2288 put_cpu_partial+0xb4/0x150 mm/slub.c:2324 __slab_free+0x288/0x350 mm/slub.c:2971 qlist_free_all+0x43/0xb0 mm/kasan/quarantine.c:167 quarantine_reduce+0x174/0x190 mm/kasan/quarantine.c:260 __kasan_kmalloc+0x43/0x1d0 mm/kasan/common.c:507 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slub.c:2829 [inline] slab_alloc mm/slub.c:2837 [inline] kmem_cache_alloc_trace+0xd7/0x240 mm/slub.c:2854 kmalloc include/linux/slab.h:556 [inline] syslog_print+0x56/0x3e0 kernel/printk/printk.c:1386 do_syslog+0x8f1/0x930 kernel/printk/printk.c:1559 __do_sys_syslog kernel/printk/printk.c:1650 [inline] __se_sys_syslog kernel/printk/printk.c:1648 [inline] __x64_sys_syslog+0x78/0x90 kernel/printk/printk.c:1648 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Memory state around the buggy address: ffff8881952ed380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881952ed400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881952ed480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881952ed500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881952ed580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== syz-executor.3 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 13369 Comm: syz-executor.3 Tainted: G B 5.4.233-syzkaller-00032-g21086923c1e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 dump_header+0xd5/0x670 mm/oom_kill.c:460 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315 __vfs_write+0x103/0x750 fs/read_write.c:494 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 memory: usage 10724kB, limit 0kB, failcnt 5314 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: anon 2453504 file 8417280 kernel_stack 0 slab 0 sock 0 shmem 8404992 file_mapped 135168 file_dirty 135168 file_writeback 135168 anon_thp 0 inactive_anon 8245248 active_anon 2703360 inactive_file 86016 active_file 135168 unevictable 0 slab_reclaimable 0 slab_unreclaimable 0 pgfault 611754 pgmajfault 0 workingset_refault 0 workingset_activate 0 workingset_nodereclaim 0 pgrefill 48893 pgscan 126987 pgsteal 86 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz3,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=12376,uid=0 Memory cgroup out of memory: Killed process 12376 (syz-executor.0) total-vm:52884kB, anon-rss:2504kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000 syz-executor.3 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 13369 Comm: syz-executor.3 Tainted: G B 5.4.233-syzkaller-00032-g21086923c1e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 dump_header+0xd5/0x670 mm/oom_kill.c:460 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315 __vfs_write+0x103/0x750 fs/read_write.c:494 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 memory: usage 8616kB, limit 0kB, failcnt 5314 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: anon 487424 file 8417280 kernel_stack 0 slab 0 sock 0 shmem 8404992 file_mapped 135168 file_dirty 135168 file_writeback 135168 anon_thp 0 inactive_anon 8245248 active_anon 675840 inactive_file 86016 active_file 135168 unevictable 0 slab_reclaimable 0 slab_unreclaimable 0 pgfault 611754 pgmajfault 0 workingset_refault 0 workingset_activate 0 workingset_nodereclaim 0 pgrefill 48893 pgscan 126987 pgsteal 86 pgactivate 48840 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz3,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=5938,uid=0 Memory cgroup out of memory: Killed process 5938 (syz-executor.0) total-vm:48516kB, anon-rss:472kB, file-rss:15212kB, shmem-rss:64kB, UID:0 pgtables:88kB oom_score_adj:0 syz-executor.3 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 13369 Comm: syz-executor.3 Tainted: G B 5.4.233-syzkaller-00032-g21086923c1e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 dump_header+0xd5/0x670 mm/oom_kill.c:460 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315 __vfs_write+0x103/0x750 fs/read_write.c:494 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 memory: usage 8604kB, limit 0kB, failcnt 5314 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: anon 352256 file 8417280 kernel_stack 0 slab 0 sock 0 shmem 8404992 file_mapped 135168 file_dirty 135168 file_writeback 135168 anon_thp 0 inactive_anon 8245248 active_anon 675840 inactive_file 86016 active_file 135168 unevictable 0 slab_reclaimable 0 slab_unreclaimable 0 pgfault 611754 pgmajfault 0 workingset_refault 0 workingset_activate 0 workingset_nodereclaim 0 pgrefill 48893 pgscan 126987 pgsteal 86 pgactivate 48840 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz3,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=12393,uid=0 Memory cgroup out of memory: Killed process 12393 (syz-executor.0) total-vm:49308kB, anon-rss:508kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:88kB oom_score_adj:1000 syz-executor.3 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 13369 Comm: syz-executor.3 Tainted: G B 5.4.233-syzkaller-00032-g21086923c1e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 dump_header+0xd5/0x670 mm/oom_kill.c:460 oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974 out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315 __vfs_write+0x103/0x750 fs/read_write.c:494 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 memory: usage 8488kB, limit 0kB, failcnt 5314 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: anon 352256 file 8417280 kernel_stack 0 slab 0 sock 0 shmem 8404992 file_mapped 135168 file_dirty 135168 file_writeback 135168 anon_thp 0 inactive_anon 8245248 active_anon 540672 inactive_file 86016 active_file 135168 unevictable 0 slab_reclaimable 0 slab_unreclaimable 0 pgfault 611754 pgmajfault 0 workingset_refault 0 workingset_activate 0 workingset_nodereclaim 0 pgrefill 48893 pgscan 126987 pgsteal 86 pgactivate 48840 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz3,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=13326,uid=0 Memory cgroup out of memory: Killed process 13326 (syz-executor.0) total-vm:187664kB, anon-rss:476kB, file-rss:14336kB, shmem-rss:0kB, UID:0 pgtables:100kB oom_score_adj:1000 syz-executor.3 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 13369 Comm: syz-executor.3 Tainted: G B 5.4.233-syzkaller-00032-g21086923c1e6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x241 lib/dump_stack.c:118 dump_header+0xd5/0x670 mm/oom_kill.c:460 out_of_memory+0x642/0x890 mm/oom_kill.c:1100 mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611 memory_max_write+0x331/0x3c0 mm/memcontrol.c:6227 cgroup_file_write+0x275/0x5c0 kernel/cgroup/cgroup.c:3898 kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315 __vfs_write+0x103/0x750 fs/read_write.c:494 vfs_write+0x206/0x4e0 fs/read_write.c:558 ksys_write+0x199/0x2c0 fs/read_write.c:611 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 memory: usage 8324kB, limit 0kB, failcnt 5326 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: anon 57344 file 8417280 kernel_stack 0 slab 0 sock 0 shmem 8404992 file_mapped 135168 file_dirty 135168 file_writeback 135168 anon_thp 0 inactive_anon 8245248 active_anon 405504 inactive_file 86016 active_file 135168 unevictable 0 slab_reclaimable 0 slab_unreclaimable 0 pgfault 611787 pgmajfault 0 workingset_refault 0 workingset_activate 0 workingset_nodereclaim 0 pgrefill 48893 pgscan 126987 pgsteal 86 pgactivate 48840 Out of memory and no killable processes...