Hello, syzbot found the following issue on: HEAD commit: f1583cb1be35 Merge tag 'linux-kselftest-next-5.15-rc1' of .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16354043300000 kernel config: https://syzkaller.appspot.com/x/.config?x=5fe535c85e8d7384 dashboard link: https://syzkaller.appspot.com/bug?extid=488ddf8087564d6de6e2 compiler: aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 userspace arch: arm64 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+488ddf8087564d6de6e2@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: invalid-access in __entry_tramp_text_end+0xdfc/0x3000 Read at addr f4ff000002a361a0 by task kdevtmpfs/22 Pointer tag: [f4], memory tag: [fe] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller-09284-gf1583cb1be35 #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x0/0x1ac arch/arm64/kernel/stacktrace.c:76 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:215 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x68/0x84 lib/dump_stack.c:105 print_address_description+0x7c/0x2b4 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report+0x134/0x380 mm/kasan/report.c:459 __do_kernel_fault+0x128/0x1bc arch/arm64/mm/fault.c:317 do_bad_area arch/arm64/mm/fault.c:466 [inline] do_tag_check_fault+0x74/0x90 arch/arm64/mm/fault.c:737 do_mem_abort+0x44/0xb4 arch/arm64/mm/fault.c:813 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:357 el1h_64_sync_handler+0xb0/0xd0 arch/arm64/kernel/entry-common.c:408 el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:567 __entry_tramp_text_end+0xdfc/0x3000 d_lookup+0x44/0x70 fs/dcache.c:2370 lookup_dcache+0x24/0x84 fs/namei.c:1520 __lookup_hash+0x24/0xd0 fs/namei.c:1543 kern_path_locked+0x90/0x10c fs/namei.c:2567 handle_remove+0x38/0x284 drivers/base/devtmpfs.c:312 handle drivers/base/devtmpfs.c:382 [inline] devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline] devtmpfsd+0x8c/0xd0 drivers/base/devtmpfs.c:437 kthread+0x150/0x15c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:756 Allocated by task 22: kasan_save_stack+0x28/0x60 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0xb0/0x110 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:2959 [inline] slab_alloc mm/slub.c:2967 [inline] kmem_cache_alloc+0x1cc/0x340 mm/slub.c:2972 getname_kernel+0x30/0x150 fs/namei.c:226 kern_path_locked+0x2c/0x10c fs/namei.c:2558 handle_remove+0x38/0x284 drivers/base/devtmpfs.c:312 handle drivers/base/devtmpfs.c:382 [inline] devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline] devtmpfsd+0x8c/0xd0 drivers/base/devtmpfs.c:437 kthread+0x150/0x15c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:756 Freed by task 22: kasan_save_stack+0x28/0x60 mm/kasan/common.c:38 kasan_set_track+0x28/0x3c mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/tags.c:36 ____kasan_slab_free.constprop.0+0x178/0x1e0 mm/kasan/common.c:366 __kasan_slab_free+0x10/0x1c mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1628 [inline] slab_free_freelist_hook+0xc4/0x20c mm/slub.c:1653 slab_free mm/slub.c:3213 [inline] kmem_cache_free+0x9c/0x420 mm/slub.c:3229 putname.part.0+0x68/0x7c fs/namei.c:270 putname include/linux/err.h:41 [inline] filename_parentat fs/namei.c:2547 [inline] kern_path_locked+0x64/0x10c fs/namei.c:2558 handle_remove+0x38/0x284 drivers/base/devtmpfs.c:312 handle drivers/base/devtmpfs.c:382 [inline] devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline] devtmpfsd+0x8c/0xd0 drivers/base/devtmpfs.c:437 kthread+0x150/0x15c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:756 The buggy address belongs to the object at ffff000002a36180 which belongs to the cache names_cache of size 4096 The buggy address is located 32 bytes inside of 4096-byte region [ffff000002a36180, ffff000002a37180) The buggy address belongs to the page: page:00000000a105b3ae refcount:1 mapcount:0 mapping:0000000000000000 index:0xf3ff000002a34100 pfn:0x42a30 head:00000000a105b3ae order:3 compound_mapcount:0 compound_pincount:0 flags: 0x1ffc00000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0) raw: 01ffc00000010200 0000000000000000 dead000000000122 faff000002837700 raw: f3ff000002a34100 0000000080070003 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff000002a35f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff000002a36000: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe >ffff000002a36100: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffff000002a36200: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ffff000002a36300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ================================================================== --- This report is generated by a bot. 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