EXT2-fs (loop5): error: ext2_free_branches: Read failure, inode=16, block=262144 ================================================================== BUG: KASAN: use-after-free in arch_test_bit include/asm-generic/bitops/non-atomic.h:118 [inline] BUG: KASAN: use-after-free in test_bit_le include/asm-generic/bitops/le.h:85 [inline] BUG: KASAN: use-after-free in ext2_valid_block_bitmap+0x10c/0x2e0 fs/ext2/balloc.c:88 Read of size 8 at addr ffff00011d3a6ff8 by task syz-executor.5/8111 CPU: 0 PID: 8111 Comm: syz-executor.5 Not tainted 5.15.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load8_noabort+0x44/0x50 mm/kasan/report_generic.c:309 arch_test_bit include/asm-generic/bitops/non-atomic.h:118 [inline] test_bit_le include/asm-generic/bitops/le.h:85 [inline] ext2_valid_block_bitmap+0x10c/0x2e0 fs/ext2/balloc.c:88 read_block_bitmap+0x294/0x340 fs/ext2/balloc.c:154 ext2_free_blocks+0x280/0xa38 fs/ext2/balloc.c:515 ext2_free_data fs/ext2/inode.c:1121 [inline] ext2_free_branches+0x2f4/0x3c4 fs/ext2/inode.c:1178 ext2_free_branches+0x180/0x3c4 fs/ext2/inode.c:1169 ext2_free_branches+0x180/0x3c4 fs/ext2/inode.c:1169 __ext2_truncate_blocks+0x9a8/0xd00 fs/ext2/inode.c:1252 ext2_setsize fs/ext2/inode.c:1314 [inline] ext2_setattr+0x658/0x904 fs/ext2/inode.c:1692 notify_change+0xa34/0xcf8 fs/attr.c:505 do_truncate+0x1c0/0x28c fs/open.c:65 handle_truncate fs/namei.c:3195 [inline] do_open fs/namei.c:3542 [inline] path_openat+0x20e8/0x26f0 fs/namei.c:3672 do_filp_open+0x1a8/0x3b4 fs/namei.c:3699 do_sys_openat2+0x128/0x3d8 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1238 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 4646: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node_track_caller+0x234/0x448 mm/slub.c:4963 kmalloc_reserve+0xe8/0x270 net/core/skbuff.c:356 __alloc_skb+0x1a4/0x584 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1167 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:664 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:721 [inline] nsim_dev_trap_report_work+0x1e4/0x90c drivers/net/netdevsim/dev.c:762 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Freed by task 4646: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x84 mm/kasan/common.c:46 kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360 ____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0x178/0x410 mm/slub.c:4559 skb_free_head net/core/skbuff.c:655 [inline] skb_release_data+0x404/0x5fc net/core/skbuff.c:677 skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb net/core/skbuff.c:756 [inline] consume_skb+0x138/0x40c net/core/skbuff.c:914 nsim_dev_trap_report drivers/net/netdevsim/dev.c:737 [inline] nsim_dev_trap_report_work+0x618/0x90c drivers/net/netdevsim/dev.c:762 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:319 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff00011d3a6000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 4088 bytes inside of 4096-byte region [ffff00011d3a6000, ffff00011d3a7000) The buggy address belongs to the page: page:000000002f224ce2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d3a0 head:000000002f224ce2 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c0002a80 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff00011d3a6e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff00011d3a6f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff00011d3a6f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff00011d3a7000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff00011d3a7080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== EXT2-fs (loop5): error: ext2_valid_block_bitmap: Invalid block bitmap - block_group = 0, block = 0 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks in system zones - Block = 3, count = 3 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 983269, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 589827, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2185560079, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 18346, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks in system zones - Block = 2, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 33261, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: bit already cleared for block 100 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132791, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132791, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: bit already cleared for block 64 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 65536, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 268435456, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1803188595, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1701604449, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2054779762, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1819042155, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 7565925, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1937768448, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1634433657, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1919249516, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1803188595, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1701604449, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2054779762, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1819042155, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2037609061, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1818323834, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 3133565699, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 327680, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 150994944, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132791, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683928664, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 3925999616, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 3409668, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: bit already cleared for block 40 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1635017060, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1936876908, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1634433657, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1919249516, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1803188595, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1701604449, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2054779762, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1819042155, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2037609061, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1818323834, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1936876908, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: bit already cleared for block 9 EXT2-fs (loop5): error: ext2_free_blocks: bit already cleared for block 13 EXT2-fs (loop5): error: ext2_free_blocks: bit already cleared for block 32 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 163928, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 2683895808, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 1669132790, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks not in datazone - block = 131072, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks in system zones - Block = 5, count = 1 EXT2-fs (loop5): error: ext2_free_blocks: Freeing blocks in system zones - Block = 5, count = 1 EXT2-fs (loop5): error: ext2_free_branches: Read failure, inode=16, block=16777216